package cluster

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"net"
	"net/url"
	"strings"
	"time"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5"
	"github.com/jackc/pgx/v5/pgconn"
	"github.com/jackc/pgx/v5/pgxpool"

	"github.com/example/remote-access-platform/backend/internal/platform/authority"
	"github.com/example/remote-access-platform/backend/internal/platform/clusterauth"
	"github.com/example/remote-access-platform/backend/internal/platform/secrets"
)

type PostgresStore struct {
	db                  *pgxpool.Pool
	authority           *authority.Verifier
	clusterKeyEncryptor *secrets.Encryptor
}

const encryptedClusterAuthorityKeyPrefix = "enc:v1:"

const nodeHeartbeatStaleIntervalSQL = "1 minute"
const meshLinkStaleIntervalSQL = "2 minutes"

func NewPostgresStore(db *pgxpool.Pool, verifiers ...*authority.Verifier) *PostgresStore {
	var authorityVerifier *authority.Verifier
	if len(verifiers) > 0 {
		authorityVerifier = verifiers[0]
	}
	return &PostgresStore{db: db, authority: authorityVerifier}
}

func (s *PostgresStore) WithClusterKeyEncryptor(encryptor *secrets.Encryptor) *PostgresStore {
	if s != nil {
		s.clusterKeyEncryptor = encryptor
	}
	return s
}

func (s *PostgresStore) encodeClusterAuthorityPrivateKey(clusterID, privateKey string) (string, error) {
	if s == nil || s.clusterKeyEncryptor == nil {
		return privateKey, nil
	}
	encrypted, err := s.clusterKeyEncryptor.Encrypt([]byte(privateKey), clusterAuthorityPrivateKeyAAD(clusterID))
	if err != nil {
		return "", err
	}
	payload, err := json.Marshal(encrypted)
	if err != nil {
		return "", err
	}
	return encryptedClusterAuthorityKeyPrefix + string(payload), nil
}

func (s *PostgresStore) decodeClusterAuthorityPrivateKey(clusterID, stored string) (string, error) {
	if !strings.HasPrefix(stored, encryptedClusterAuthorityKeyPrefix) {
		if s != nil && s.clusterKeyEncryptor != nil {
			return "", fmt.Errorf("cluster authority private key is not encrypted")
		}
		return stored, nil
	}
	if s == nil || s.clusterKeyEncryptor == nil {
		return "", secrets.ErrSecretEncryptionKeyMissing
	}
	var encrypted secrets.EncryptedPayload
	if err := json.Unmarshal([]byte(strings.TrimPrefix(stored, encryptedClusterAuthorityKeyPrefix)), &encrypted); err != nil {
		return "", fmt.Errorf("decode encrypted cluster authority private key: %w", err)
	}
	plaintext, err := s.clusterKeyEncryptor.Decrypt(encrypted, clusterAuthorityPrivateKeyAAD(clusterID))
	if err != nil {
		return "", err
	}
	return string(plaintext), nil
}

func clusterAuthorityPrivateKeyAAD(clusterID string) []byte {
	return []byte("rap-cluster-authority-v1|" + strings.TrimSpace(clusterID))
}

func stringPtrValue(value *string) string {
	if value == nil {
		return ""
	}
	return strings.TrimSpace(*value)
}

func (s *PostgresStore) GetPlatformRole(ctx context.Context, userID string) (string, error) {
	return authority.EffectivePlatformRole(ctx, s.db, s.authority, userID)
}

func (s *PostgresStore) ListClusters(ctx context.Context) ([]Cluster, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, slug, name, status, region, metadata, created_at, updated_at
		FROM clusters
		ORDER BY created_at DESC
	`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []Cluster
	for rows.Next() {
		item, err := scanCluster(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) GetCluster(ctx context.Context, clusterID string) (Cluster, error) {
	row := s.db.QueryRow(ctx, `
		SELECT id::text, slug, name, status, region, metadata, created_at, updated_at
		FROM clusters
		WHERE id = $1::uuid
	`, clusterID)
	return scanCluster(row)
}

func (s *PostgresStore) CreateCluster(ctx context.Context, input CreateClusterInput) (Cluster, error) {
	id := uuid.NewString()
	now := time.Now().UTC()
	keys, err := clusterauth.GenerateKeyPair()
	if err != nil {
		return Cluster{}, err
	}
	storedPrivateKey, err := s.encodeClusterAuthorityPrivateKey(id, keys.PrivateKeyB64)
	if err != nil {
		return Cluster{}, err
	}
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return Cluster{}, err
	}
	defer func() { _ = tx.Rollback(ctx) }()

	row := tx.QueryRow(ctx, `
		INSERT INTO clusters (id, slug, name, status, region, metadata, created_at, updated_at)
		VALUES ($1::uuid, $2, $3, 'active', $4, $5::jsonb, $6, $6)
		RETURNING id::text, slug, name, status, region, metadata, created_at, updated_at
	`, id, input.Slug, input.Name, input.Region, []byte(input.Metadata), now)
	item, err := scanCluster(row)
	if err != nil {
		return Cluster{}, err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_authority_states (cluster_id, authority_state, mutation_mode, term, notes, updated_by_user_id, updated_at)
		VALUES ($1::uuid, 'authoritative', 'normal', 1, 'cluster created with authority key', $2::uuid, $3)
		ON CONFLICT (cluster_id) DO NOTHING
	`, id, input.ActorUserID, now); err != nil {
		return Cluster{}, err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_authorities (
			cluster_id, authority_state, key_algorithm, public_key, public_key_fingerprint,
			private_key, created_by_user_id, created_at, updated_at, metadata
		) VALUES ($1::uuid, 'active', 'ed25519', $2, $3, $4, $5::uuid, $6, $6, $7::jsonb)
	`, id, keys.PublicKeyB64, keys.Fingerprint, storedPrivateKey, input.ActorUserID, now, []byte(`{"storage":"database_signer","production_target":"external_cluster_signer_or_hsm"}`)); err != nil {
		return Cluster{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return Cluster{}, err
	}
	return item, nil
}

func (s *PostgresStore) UpdateCluster(ctx context.Context, input UpdateClusterInput) (Cluster, error) {
	now := time.Now().UTC()
	row := s.db.QueryRow(ctx, `
		UPDATE clusters
		SET name = $2,
		    status = $3,
		    region = $4,
		    metadata = $5::jsonb,
		    updated_at = $6
		WHERE id = $1::uuid
		RETURNING id::text, slug, name, status, region, metadata, created_at, updated_at
	`, input.ClusterID, input.Name, input.Status, input.Region, []byte(input.Metadata), now)
	return scanCluster(row)
}

func (s *PostgresStore) GetClusterAuthority(ctx context.Context, clusterID string) (ClusterAuthorityKey, error) {
	row := s.db.QueryRow(ctx, `
		SELECT cluster_id::text, authority_state, key_algorithm, public_key,
		       public_key_fingerprint, private_key, created_at, updated_at, metadata
		FROM cluster_authorities
		WHERE cluster_id = $1::uuid
	`, clusterID)
	item, err := scanClusterAuthority(row)
	if err != nil {
		return ClusterAuthorityKey{}, err
	}
	privateKey, err := s.decodeClusterAuthorityPrivateKey(item.ClusterID, item.PrivateKey)
	if err != nil {
		return ClusterAuthorityKey{}, err
	}
	item.PrivateKey = privateKey
	return item, nil
}

func (s *PostgresStore) EnsureClusterAuthority(ctx context.Context, clusterID string, actorUserID *string) (ClusterAuthorityKey, error) {
	keys, err := clusterauth.GenerateKeyPair()
	if err != nil {
		return ClusterAuthorityKey{}, err
	}
	storedPrivateKey, err := s.encodeClusterAuthorityPrivateKey(clusterID, keys.PrivateKeyB64)
	if err != nil {
		return ClusterAuthorityKey{}, err
	}
	now := time.Now().UTC()
	_, err = s.db.Exec(ctx, `
		INSERT INTO cluster_authorities (
			cluster_id, authority_state, key_algorithm, public_key, public_key_fingerprint,
			private_key, created_by_user_id, created_at, updated_at, metadata
		)
		SELECT c.id, 'active', 'ed25519', $2, $3, $4, $5::uuid, $6, $6,
		       '{"storage":"database_signer","created_by":"ensure_cluster_authority"}'::jsonb
		FROM clusters c
		WHERE c.id = $1::uuid
		ON CONFLICT (cluster_id) DO NOTHING
	`, clusterID, keys.PublicKeyB64, keys.Fingerprint, storedPrivateKey, actorUserID, now)
	if err != nil {
		return ClusterAuthorityKey{}, err
	}
	_, _ = s.db.Exec(ctx, `
		INSERT INTO cluster_authority_states (cluster_id, authority_state, mutation_mode, term, notes, updated_by_user_id, updated_at)
		VALUES ($1::uuid, 'authoritative', 'normal', 1, 'authority key ensured', $2::uuid, $3)
		ON CONFLICT (cluster_id) DO NOTHING
	`, clusterID, actorUserID, now)
	return s.GetClusterAuthority(ctx, clusterID)
}

func (s *PostgresStore) ListClusterNodes(ctx context.Context, clusterID string) ([]ClusterNode, error) {
	rows, err := s.db.Query(ctx, `
		SELECT n.id::text, n.owner_organization_id::text, n.node_key, n.name, n.ownership_type,
		       n.registration_status,
		       CASE
		           WHEN n.registration_status = 'active'
		            AND COALESCE(n.last_seen_at, n.updated_at, n.created_at) < NOW() - $2::interval THEN 'offline'
		           ELSE n.health_status
		       END AS health_status,
		       CASE
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version = update_policy.target_version THEN 'current'
		           WHEN update_status.status IN ('failed', 'error') THEN 'failed'
		           WHEN update_status.phase = 'rollback' OR update_status.status = 'rolled_back' THEN 'rollback'
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version IS DISTINCT FROM update_policy.target_version
		            AND update_status.target_version = update_policy.target_version
		            AND update_status.phase IN ('planned', 'download', 'apply', 'health_check')
		            AND update_status.status IN ('accepted', 'started', 'staged', 'running') THEN 'updating'
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version IS DISTINCT FROM update_policy.target_version THEN 'outdated'
		           ELSE n.version_state
		       END AS version_state,
		       n.partition_state,
		       n.reported_version, n.last_seen_at, cm.membership_status, cm.metadata,
		       ng.id::text, ng.name,
		       n.created_at, n.updated_at
		FROM cluster_memberships cm
		JOIN nodes n ON n.id = cm.node_id
		LEFT JOIN cluster_node_group_memberships ngm ON ngm.cluster_id = cm.cluster_id AND ngm.node_id = cm.node_id
		LEFT JOIN cluster_node_groups ng ON ng.cluster_id = ngm.cluster_id AND ng.id = ngm.group_id
		LEFT JOIN LATERAL (
			SELECT p.enabled, p.target_version
			FROM node_update_desired_policies p
			WHERE p.cluster_id = cm.cluster_id
			  AND p.node_id = cm.node_id
			  AND p.product = 'rap-node-agent'
			  AND p.enabled
			ORDER BY p.updated_at DESC
			LIMIT 1
		) update_policy ON true
		LEFT JOIN LATERAL (
			SELECT s.target_version, s.phase, s.status
			FROM node_update_status_reports s
			WHERE s.cluster_id = cm.cluster_id
			  AND s.node_id = cm.node_id
			  AND s.product = 'rap-node-agent'
			ORDER BY s.observed_at DESC
			LIMIT 1
		) update_status ON true
		WHERE cm.cluster_id = $1::uuid
		ORDER BY n.created_at DESC
	`, clusterID, nodeHeartbeatStaleIntervalSQL)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []ClusterNode
	for rows.Next() {
		item, err := scanClusterNode(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) RegisterFabricNode(ctx context.Context, input RegisterFabricNodeInput) (ClusterNode, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return ClusterNode{}, err
	}
	defer tx.Rollback(ctx)

	now := time.Now().UTC()
	nodeID := uuid.NewString()
	row := tx.QueryRow(ctx, `
		INSERT INTO nodes (
			id, owner_organization_id, node_key, name, ownership_type, registration_status, health_status,
			version_state, partition_state, reported_version, metadata, created_at, updated_at
		) VALUES ($1::uuid, $2::uuid, $3, $4, $5, 'active', 'healthy', 'current', 'healthy', $6, $7::jsonb, $8, $8)
		ON CONFLICT (node_key) DO UPDATE SET
			owner_organization_id = COALESCE(EXCLUDED.owner_organization_id, nodes.owner_organization_id),
			name = EXCLUDED.name,
			ownership_type = EXCLUDED.ownership_type,
			registration_status = 'active',
			health_status = 'healthy',
			reported_version = COALESCE(EXCLUDED.reported_version, nodes.reported_version),
			metadata = nodes.metadata || EXCLUDED.metadata,
			updated_at = EXCLUDED.updated_at
		RETURNING id::text
	`, nodeID, input.OwnerOrganizationID, input.NodeKey, input.Name, input.OwnershipType, input.ReportedVersion, []byte(input.Metadata), now)
	if err := row.Scan(&nodeID); err != nil {
		return ClusterNode{}, err
	}

	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_memberships (cluster_id, node_id, membership_status, joined_at, last_seen_at, metadata)
		VALUES ($1::uuid, $2::uuid, 'active', $3, $3, $4::jsonb)
		ON CONFLICT (cluster_id, node_id) DO UPDATE SET
			membership_status = 'active',
			last_seen_at = EXCLUDED.last_seen_at,
			metadata = cluster_memberships.metadata || EXCLUDED.metadata
	`, input.ClusterID, nodeID, now, []byte(`{"source":"fabric_control_register"}`)); err != nil {
		return ClusterNode{}, err
	}

	itemRow := tx.QueryRow(ctx, `
		SELECT n.id::text, n.owner_organization_id::text, n.node_key, n.name, n.ownership_type,
		       n.registration_status, n.health_status, n.version_state, n.partition_state,
		       n.reported_version, n.last_seen_at, cm.membership_status, cm.metadata,
		       ng.id::text, ng.name,
		       n.created_at, n.updated_at
		FROM cluster_memberships cm
		JOIN nodes n ON n.id = cm.node_id
		LEFT JOIN cluster_node_group_memberships ngm ON ngm.cluster_id = cm.cluster_id AND ngm.node_id = cm.node_id
		LEFT JOIN cluster_node_groups ng ON ng.cluster_id = ngm.cluster_id AND ng.id = ngm.group_id
		WHERE cm.cluster_id = $1::uuid
		  AND cm.node_id = $2::uuid
	`, input.ClusterID, nodeID)
	item, err := scanClusterNode(itemRow)
	if err != nil {
		return ClusterNode{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return ClusterNode{}, err
	}
	return item, nil
}

func (s *PostgresStore) ListNodeGroups(ctx context.Context, clusterID string) ([]ClusterNodeGroup, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, parent_group_id::text, name, description,
		       sort_order, metadata, created_by_user_id::text, created_at, updated_at
		FROM cluster_node_groups
		WHERE cluster_id = $1::uuid
		ORDER BY sort_order, name
	`, clusterID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []ClusterNodeGroup
	for rows.Next() {
		item, err := scanNodeGroup(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	if out == nil {
		out = []ClusterNodeGroup{}
	}
	return out, rows.Err()
}

func (s *PostgresStore) CreateNodeGroup(ctx context.Context, input CreateNodeGroupInput) (ClusterNodeGroup, error) {
	id := uuid.NewString()
	row := s.db.QueryRow(ctx, `
		WITH parent_ok AS (
			SELECT $3::uuid AS parent_group_id
			WHERE $3::uuid IS NULL
			   OR EXISTS (
			       SELECT 1
			       FROM cluster_node_groups parent
			       WHERE parent.cluster_id = $2::uuid
			         AND parent.id = $3::uuid
			   )
		)
		INSERT INTO cluster_node_groups (
			id, cluster_id, parent_group_id, name, description, sort_order, metadata, created_by_user_id, created_at, updated_at
		)
		SELECT $1::uuid, $2::uuid, parent_group_id, $4, $5, $6, $7::jsonb, $8::uuid, NOW(), NOW()
		FROM parent_ok
		RETURNING id::text, cluster_id::text, parent_group_id::text, name, description,
		          sort_order, metadata, created_by_user_id::text, created_at, updated_at
	`, id, input.ClusterID, input.ParentGroupID, input.Name, input.Description, input.SortOrder, []byte(input.Metadata), input.ActorUserID)
	item, err := scanNodeGroup(row)
	if err != nil {
		return ClusterNodeGroup{}, err
	}
	_ = s.RecordAudit(ctx, ClusterAuditEvent{
		ClusterID:   &input.ClusterID,
		ActorUserID: &input.ActorUserID,
		EventType:   "cluster_node_group.created",
		TargetType:  "cluster_node_group",
		TargetID:    &item.ID,
		Payload:     json.RawMessage(`{"hierarchical":true}`),
		CreatedAt:   time.Now().UTC(),
	})
	return item, nil
}

func (s *PostgresStore) CreateJoinToken(ctx context.Context, input CreateJoinTokenInput, tokenHash string) (NodeJoinToken, error) {
	id := uuid.NewString()
	row := s.db.QueryRow(ctx, `
		INSERT INTO node_join_tokens (
			id, cluster_id, token_hash, scope, expires_at, max_uses, used_count, status, created_by_user_id, created_at
		) VALUES ($1::uuid, $2::uuid, $3, $4::jsonb, $5, $6, 0, 'active', $7::uuid, NOW())
		RETURNING id::text, cluster_id::text, scope, expires_at, max_uses, used_count, status,
		          created_by_user_id::text, created_at, revoked_at, authority_payload, authority_signature
	`, id, input.ClusterID, tokenHash, []byte(input.Scope), input.ExpiresAt, input.MaxUses, input.ActorUserID)
	return scanJoinToken(row)
}

func (s *PostgresStore) ListJoinTokens(ctx context.Context, clusterID string) ([]NodeJoinToken, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, scope, expires_at, max_uses, used_count, status,
		       created_by_user_id::text, created_at, revoked_at, authority_payload, authority_signature
		FROM node_join_tokens
		WHERE cluster_id = $1::uuid
		ORDER BY created_at DESC
	`, clusterID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeJoinToken
	for rows.Next() {
		item, err := scanJoinToken(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	if out == nil {
		out = []NodeJoinToken{}
	}
	return out, rows.Err()
}

func (s *PostgresStore) SetJoinTokenAuthority(ctx context.Context, clusterID, tokenID string, payload json.RawMessage, signature ClusterSignature) (NodeJoinToken, error) {
	signatureJSON, err := json.Marshal(signature)
	if err != nil {
		return NodeJoinToken{}, err
	}
	row := s.db.QueryRow(ctx, `
		UPDATE node_join_tokens
		SET authority_payload = $3::jsonb,
		    authority_signature = $4::jsonb
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		RETURNING id::text, cluster_id::text, scope, expires_at, max_uses, used_count, status,
		          created_by_user_id::text, created_at, revoked_at, authority_payload, authority_signature
	`, clusterID, tokenID, []byte(payload), signatureJSON)
	return scanJoinToken(row)
}

func (s *PostgresStore) GetValidJoinTokenByHash(ctx context.Context, clusterID, tokenHash string) (NodeJoinToken, error) {
	row := s.db.QueryRow(ctx, `
		SELECT id::text, cluster_id::text, scope, expires_at, max_uses, used_count, status,
		       created_by_user_id::text, created_at, revoked_at, authority_payload, authority_signature
		FROM node_join_tokens
		WHERE cluster_id = $1::uuid
		  AND token_hash = $2
		  AND status = 'active'
		  AND expires_at > NOW()
		  AND used_count < max_uses
	`, clusterID, tokenHash)
	return scanJoinToken(row)
}

func (s *PostgresStore) RevokeJoinToken(ctx context.Context, input RevokeJoinTokenInput) (NodeJoinToken, error) {
	row := s.db.QueryRow(ctx, `
		UPDATE node_join_tokens
		SET status = 'revoked',
		    revoked_at = NOW()
		WHERE id = $1::uuid
		  AND cluster_id = $2::uuid
		  AND status = 'active'
		RETURNING id::text, cluster_id::text, scope, expires_at, max_uses, used_count, status,
		          created_by_user_id::text, created_at, revoked_at, authority_payload, authority_signature
	`, input.TokenID, input.ClusterID)
	return scanJoinToken(row)
}

func (s *PostgresStore) ExpireJoinTokens(ctx context.Context, clusterID string) error {
	_, err := s.db.Exec(ctx, `
		UPDATE node_join_tokens
		SET status = 'expired'
		WHERE cluster_id = $1::uuid
		  AND status = 'active'
		  AND expires_at <= NOW()
	`, clusterID)
	return err
}

func (s *PostgresStore) CreateJoinRequest(ctx context.Context, input CreateJoinRequestInput, joinTokenID string) (NodeJoinRequest, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return NodeJoinRequest{}, err
	}
	defer tx.Rollback(ctx)

	tag, err := tx.Exec(ctx, `
		UPDATE node_join_tokens
		SET used_count = used_count + 1
		WHERE id = $1::uuid
		  AND cluster_id = $2::uuid
		  AND status = 'active'
		  AND expires_at > NOW()
		  AND used_count < max_uses
	`, joinTokenID, input.ClusterID)
	if err != nil {
		return NodeJoinRequest{}, err
	}
	if tag.RowsAffected() != 1 {
		return NodeJoinRequest{}, pgx.ErrNoRows
	}

	id := uuid.NewString()
	row := tx.QueryRow(ctx, `
		INSERT INTO node_join_requests (
			id, cluster_id, join_token_id, node_name, node_fingerprint, public_key,
			reported_capabilities, reported_facts, requested_roles, status, created_at, updated_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, $5, $6, $7::jsonb, $8::jsonb, $9::jsonb, 'pending', NOW(), NOW())
		RETURNING id::text, cluster_id::text, join_token_id::text, node_name, node_fingerprint, public_key,
		          reported_capabilities, reported_facts, requested_roles, status, reviewed_by_user_id::text,
		          reviewed_at, approved_node_id::text, rejection_reason, created_at, updated_at, approval_payload, approval_signature
	`, id, input.ClusterID, joinTokenID, input.NodeName, input.NodeFingerprint, input.PublicKey, []byte(input.ReportedCapabilities), []byte(input.ReportedFacts), []byte(input.RequestedRoles))
	item, err := scanJoinRequest(row)
	if err != nil {
		return NodeJoinRequest{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return NodeJoinRequest{}, err
	}
	return item, nil
}

func (s *PostgresStore) GetJoinRequestForJoin(ctx context.Context, input GetJoinRequestJoinInput) (NodeJoinRequest, error) {
	row := s.db.QueryRow(ctx, `
		SELECT id::text, cluster_id::text, join_token_id::text, node_name, node_fingerprint, public_key,
		       reported_capabilities, reported_facts, requested_roles, status, reviewed_by_user_id::text,
		       reviewed_at, approved_node_id::text, rejection_reason, created_at, updated_at, approval_payload, approval_signature
		FROM node_join_requests
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		  AND node_fingerprint = $3
		  AND public_key = $4
	`, input.ClusterID, input.JoinRequestID, input.NodeFingerprint, input.PublicKey)
	return scanJoinRequest(row)
}

func (s *PostgresStore) ListJoinRequests(ctx context.Context, clusterID string) ([]NodeJoinRequest, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, join_token_id::text, node_name, node_fingerprint, public_key,
		       reported_capabilities, reported_facts, requested_roles, status, reviewed_by_user_id::text,
		       reviewed_at, approved_node_id::text, rejection_reason, created_at, updated_at, approval_payload, approval_signature
		FROM node_join_requests
		WHERE cluster_id = $1::uuid
		ORDER BY created_at DESC
	`, clusterID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeJoinRequest
	for rows.Next() {
		item, err := scanJoinRequest(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) ApproveJoinRequest(ctx context.Context, input ApproveJoinRequestInput) (ApprovedJoinRequest, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return ApprovedJoinRequest{}, err
	}
	defer tx.Rollback(ctx)

	req, err := getJoinRequestForUpdate(ctx, tx, input.ClusterID, input.JoinRequestID)
	if err != nil {
		return ApprovedJoinRequest{}, err
	}
	if req.Status != JoinRequestStatusPending {
		return ApprovedJoinRequest{}, errors.New("join request is not pending")
	}

	now := time.Now().UTC()
	nodeID := uuid.NewString()
	nodeKey := input.NodeKey
	if nodeKey == "" {
		nodeKey = req.NodeFingerprint
	}
	ownershipType := input.OwnershipType
	if ownershipType == "" {
		ownershipType = "platform_managed"
	}
	nodeGroupID := strings.TrimSpace(stringPtrValue(input.NodeGroupID))
	if nodeGroupID == "" {
		nodeGroupID, err = s.joinRequestTokenNodeGroupID(ctx, tx, req)
		if err != nil {
			return ApprovedJoinRequest{}, err
		}
	}

	if _, err := tx.Exec(ctx, `
		INSERT INTO nodes (
			id, owner_organization_id, node_key, name, ownership_type, registration_status, health_status,
			version_state, partition_state, metadata, created_at, updated_at
		) VALUES ($1::uuid, $2::uuid, $3, $4, $5, 'active', 'unknown', 'unknown', 'healthy', $6::jsonb, $7, $7)
	`, nodeID, input.OwnerOrganizationID, nodeKey, req.NodeName, ownershipType, []byte(`{"created_from_join_request":true}`), now); err != nil {
		return ApprovedJoinRequest{}, err
	}

	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_memberships (cluster_id, node_id, membership_status, joined_at, metadata)
		VALUES ($1::uuid, $2::uuid, 'active', $3, $4::jsonb)
	`, input.ClusterID, nodeID, now, []byte(`{"created_from_join_request":true}`)); err != nil {
		return ApprovedJoinRequest{}, err
	}
	if nodeGroupID != "" {
		tag, err := tx.Exec(ctx, `
			INSERT INTO cluster_node_group_memberships (cluster_id, node_id, group_id, assigned_by_user_id, assigned_at, metadata)
			SELECT $1::uuid, $2::uuid, id, $4::uuid, $5, $6::jsonb
			FROM cluster_node_groups
			WHERE cluster_id = $1::uuid
			  AND id = $3::uuid
		`, input.ClusterID, nodeID, nodeGroupID, input.ActorUserID, now, []byte(`{"source":"join_token_scope"}`))
		if err != nil {
			return ApprovedJoinRequest{}, err
		}
		if tag.RowsAffected() != 1 {
			return ApprovedJoinRequest{}, ErrInvalidPayload
		}
	}
	roles, err := s.joinRequestTokenRoles(ctx, tx, req)
	if err != nil {
		return ApprovedJoinRequest{}, err
	}
	for _, role := range roles {
		if _, ok := allowedNodeRoles[role]; !ok {
			return ApprovedJoinRequest{}, ErrInvalidPayload
		}
		if _, err := tx.Exec(ctx, `
			INSERT INTO node_role_assignments (id, cluster_id, node_id, role, status, policy, assigned_by_user_id, assigned_at)
			VALUES ($1::uuid, $2::uuid, $3::uuid, $4, 'active', $5::jsonb, $6::uuid, $7)
			ON CONFLICT DO NOTHING
		`, uuid.NewString(), input.ClusterID, nodeID, role, []byte(`{"source":"join_token_scope"}`), input.ActorUserID, now); err != nil {
			return ApprovedJoinRequest{}, err
		}
	}

	if _, err := tx.Exec(ctx, `
		INSERT INTO node_identities (node_id, public_key, identity_status, metadata, created_at, updated_at)
		VALUES ($1::uuid, $2, 'active', $3::jsonb, $4, $4)
	`, nodeID, req.PublicKey, []byte(`{"source":"join_request"}`), now); err != nil {
		return ApprovedJoinRequest{}, err
	}

	row := tx.QueryRow(ctx, `
		UPDATE node_join_requests
		SET status = 'approved',
		    reviewed_by_user_id = $3::uuid,
		    reviewed_at = $4,
		    approved_node_id = $5::uuid,
		    updated_at = $4
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		RETURNING id::text, cluster_id::text, join_token_id::text, node_name, node_fingerprint, public_key,
		          reported_capabilities, reported_facts, requested_roles, status, reviewed_by_user_id::text,
		          reviewed_at, approved_node_id::text, rejection_reason, created_at, updated_at, approval_payload, approval_signature
	`, input.ClusterID, input.JoinRequestID, input.ActorUserID, now, nodeID)
	updated, err := scanJoinRequest(row)
	if err != nil {
		return ApprovedJoinRequest{}, err
	}

	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_audit_events (cluster_id, actor_user_id, event_type, target_type, target_id, payload, created_at)
		VALUES ($1::uuid, $2::uuid, 'node_join_request.approved', 'node_join_request', $3, $4::jsonb, $5)
	`, input.ClusterID, input.ActorUserID, input.JoinRequestID, []byte(fmt.Sprintf(`{"node_id":%q}`, nodeID)), now); err != nil {
		return ApprovedJoinRequest{}, err
	}

	if err := tx.Commit(ctx); err != nil {
		return ApprovedJoinRequest{}, err
	}
	return ApprovedJoinRequest{
		JoinRequest: updated,
		JoinContract: NodeJoinContract{
			NodeID:         nodeID,
			ClusterID:      input.ClusterID,
			IdentityStatus: "active",
			Certificate: map[string]any{
				"status": "pending_issuer_integration",
			},
			HeartbeatEndpoint: fmt.Sprintf("/api/v1/clusters/%s/nodes/%s/heartbeats", input.ClusterID, nodeID),
		},
	}, nil
}

func (s *PostgresStore) joinRequestTokenNodeGroupID(ctx context.Context, tx pgx.Tx, req NodeJoinRequest) (string, error) {
	if req.JoinTokenID == nil || strings.TrimSpace(*req.JoinTokenID) == "" {
		return "", nil
	}
	var scopeBytes []byte
	if err := tx.QueryRow(ctx, `
		SELECT scope
		FROM node_join_tokens
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
	`, req.ClusterID, *req.JoinTokenID).Scan(&scopeBytes); err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return "", nil
		}
		return "", err
	}
	var scope struct {
		NodeGroupID string `json:"node_group_id"`
	}
	if len(scopeBytes) == 0 || !json.Valid(scopeBytes) {
		return "", nil
	}
	if err := json.Unmarshal(scopeBytes, &scope); err != nil {
		return "", err
	}
	return strings.TrimSpace(scope.NodeGroupID), nil
}

func (s *PostgresStore) joinRequestTokenRoles(ctx context.Context, tx pgx.Tx, req NodeJoinRequest) ([]string, error) {
	if req.JoinTokenID == nil || strings.TrimSpace(*req.JoinTokenID) == "" {
		return nil, nil
	}
	var scopeBytes []byte
	if err := tx.QueryRow(ctx, `
		SELECT scope
		FROM node_join_tokens
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
	`, req.ClusterID, *req.JoinTokenID).Scan(&scopeBytes); err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return nil, nil
		}
		return nil, err
	}
	var scope struct {
		Roles []string `json:"roles"`
	}
	if len(scopeBytes) == 0 || !json.Valid(scopeBytes) {
		return nil, nil
	}
	if err := json.Unmarshal(scopeBytes, &scope); err != nil {
		return nil, err
	}
	out := make([]string, 0, len(scope.Roles))
	seen := map[string]struct{}{}
	for _, role := range scope.Roles {
		role = strings.TrimSpace(role)
		if role == "" {
			continue
		}
		if _, ok := seen[role]; ok {
			continue
		}
		seen[role] = struct{}{}
		out = append(out, role)
	}
	return out, nil
}

func (s *PostgresStore) SetJoinRequestApprovalAuthority(ctx context.Context, clusterID, joinRequestID string, payload json.RawMessage, signature ClusterSignature) (NodeJoinRequest, error) {
	signatureJSON, err := json.Marshal(signature)
	if err != nil {
		return NodeJoinRequest{}, err
	}
	row := s.db.QueryRow(ctx, `
		UPDATE node_join_requests
		SET approval_payload = $3::jsonb,
		    approval_signature = $4::jsonb,
		    updated_at = NOW()
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		RETURNING id::text, cluster_id::text, join_token_id::text, node_name, node_fingerprint, public_key,
		          reported_capabilities, reported_facts, requested_roles, status, reviewed_by_user_id::text,
		          reviewed_at, approved_node_id::text, rejection_reason, created_at, updated_at, approval_payload, approval_signature
	`, clusterID, joinRequestID, []byte(payload), signatureJSON)
	return scanJoinRequest(row)
}

func (s *PostgresStore) RejectJoinRequest(ctx context.Context, input RejectJoinRequestInput) (NodeJoinRequest, error) {
	now := time.Now().UTC()
	row := s.db.QueryRow(ctx, `
		UPDATE node_join_requests
		SET status = 'rejected',
		    reviewed_by_user_id = $3::uuid,
		    reviewed_at = $4,
		    rejection_reason = $5,
		    updated_at = $4
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		  AND status = 'pending'
		RETURNING id::text, cluster_id::text, join_token_id::text, node_name, node_fingerprint, public_key,
		          reported_capabilities, reported_facts, requested_roles, status, reviewed_by_user_id::text,
		          reviewed_at, approved_node_id::text, rejection_reason, created_at, updated_at, approval_payload, approval_signature
	`, input.ClusterID, input.JoinRequestID, input.ActorUserID, now, input.Reason)
	return scanJoinRequest(row)
}

func (s *PostgresStore) AssignNodeRole(ctx context.Context, input AssignNodeRoleInput) (NodeRoleAssignment, error) {
	id := uuid.NewString()
	status := input.Status
	if status == "" {
		status = "active"
	}
	if status != "active" {
		row := s.db.QueryRow(ctx, `
			UPDATE node_role_assignments
			SET status = $6,
			    revoked_at = CASE WHEN $6 = 'revoked' THEN NOW() ELSE revoked_at END,
			    policy = $7::jsonb,
			    assigned_by_user_id = $8::uuid
			WHERE cluster_id = $2::uuid
			  AND node_id = $3::uuid
			  AND role = $5
			  AND COALESCE(organization_id, '00000000-0000-0000-0000-000000000000'::uuid) =
			      COALESCE($4::uuid, '00000000-0000-0000-0000-000000000000'::uuid)
			  AND status = 'active'
			RETURNING id::text, cluster_id::text, node_id::text, organization_id::text, role, status,
			          policy, assigned_by_user_id::text, assigned_at, revoked_at
		`, id, input.ClusterID, input.NodeID, input.OrganizationID, input.Role, status, []byte(input.Policy), input.ActorUserID)
		return scanRoleAssignment(row)
	}
	row := s.db.QueryRow(ctx, `
		INSERT INTO node_role_assignments (
			id, cluster_id, node_id, organization_id, role, status, policy, assigned_by_user_id, assigned_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4::uuid, $5, $6, $7::jsonb, $8::uuid, NOW())
		ON CONFLICT (cluster_id, node_id, role, COALESCE(organization_id, '00000000-0000-0000-0000-000000000000'::uuid))
		WHERE status = 'active'
		DO UPDATE SET
			policy = EXCLUDED.policy,
			assigned_by_user_id = EXCLUDED.assigned_by_user_id
		RETURNING id::text, cluster_id::text, node_id::text, organization_id::text, role, status,
		          policy, assigned_by_user_id::text, assigned_at, revoked_at
	`, id, input.ClusterID, input.NodeID, input.OrganizationID, input.Role, status, []byte(input.Policy), input.ActorUserID)
	return scanRoleAssignment(row)
}

func (s *PostgresStore) ListNodeRoleAssignments(ctx context.Context, clusterID, nodeID string) ([]NodeRoleAssignment, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, node_id::text, organization_id::text, role, status,
		       policy, assigned_by_user_id::text, assigned_at, revoked_at
		FROM node_role_assignments
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
		ORDER BY assigned_at DESC
	`, clusterID, nodeID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeRoleAssignment
	for rows.Next() {
		item, err := scanRoleAssignment(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) AttachExistingNodeToCluster(ctx context.Context, input AttachExistingNodeInput) (ClusterNode, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return ClusterNode{}, err
	}
	defer tx.Rollback(ctx)

	now := time.Now().UTC()
	membershipMetadata, err := json.Marshal(map[string]any{
		"attached_from_existing_node": true,
		"attached_at":                 now.Format(time.RFC3339Nano),
	})
	if err != nil {
		return ClusterNode{}, err
	}
	tag, err := tx.Exec(ctx, `
		WITH eligible_node AS (
			SELECT id
			FROM nodes
			WHERE id = $2::uuid
			  AND registration_status = 'active'
		)
		INSERT INTO cluster_memberships (cluster_id, node_id, membership_status, joined_at, metadata)
		SELECT $1::uuid, id, 'active', $3, $4::jsonb
		FROM eligible_node
		ON CONFLICT (cluster_id, node_id) DO UPDATE SET
			membership_status = 'active',
			metadata = cluster_memberships.metadata || EXCLUDED.metadata
		WHERE cluster_memberships.membership_status <> 'revoked'
	`, input.ClusterID, input.NodeID, now, membershipMetadata)
	if err != nil {
		return ClusterNode{}, err
	}
	if tag.RowsAffected() != 1 {
		return ClusterNode{}, pgx.ErrNoRows
	}

	for _, role := range input.Roles {
		_, err := tx.Exec(ctx, `
			INSERT INTO node_role_assignments (
				id, cluster_id, node_id, role, status, policy, assigned_by_user_id, assigned_at
			) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, 'active', '{}'::jsonb, $5::uuid, $6)
			ON CONFLICT DO NOTHING
		`, uuid.NewString(), input.ClusterID, input.NodeID, role, input.ActorUserID, now)
		if err != nil {
			return ClusterNode{}, err
		}
	}

	auditPayload, err := json.Marshal(map[string]any{
		"attached_from_existing_node": true,
		"roles":                       input.Roles,
	})
	if err != nil {
		return ClusterNode{}, err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_audit_events (cluster_id, actor_user_id, event_type, target_type, target_id, payload, created_at)
		VALUES ($1::uuid, $2::uuid, 'cluster_membership.attached_existing_node', 'node', $3, $4::jsonb, $5)
	`, input.ClusterID, input.ActorUserID, input.NodeID, auditPayload, now); err != nil {
		return ClusterNode{}, err
	}

	row := tx.QueryRow(ctx, `
		SELECT n.id::text, n.owner_organization_id::text, n.node_key, n.name, n.ownership_type,
		       n.registration_status,
		       CASE
		           WHEN n.registration_status = 'active'
		            AND COALESCE(n.last_seen_at, n.updated_at, n.created_at) < NOW() - $3::interval THEN 'offline'
		           ELSE n.health_status
		       END AS health_status,
		       CASE
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version = update_policy.target_version THEN 'current'
		           WHEN update_status.status IN ('failed', 'error') THEN 'failed'
		           WHEN update_status.phase = 'rollback' OR update_status.status = 'rolled_back' THEN 'rollback'
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version IS DISTINCT FROM update_policy.target_version
		            AND update_status.target_version = update_policy.target_version
		            AND update_status.phase IN ('planned', 'download', 'apply', 'health_check')
		            AND update_status.status IN ('accepted', 'started', 'staged', 'running') THEN 'updating'
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version IS DISTINCT FROM update_policy.target_version THEN 'outdated'
		           ELSE n.version_state
		       END AS version_state,
		       n.partition_state,
		       n.reported_version, n.last_seen_at, cm.membership_status, cm.metadata,
		       ng.id::text, ng.name,
		       n.created_at, n.updated_at
		FROM cluster_memberships cm
		JOIN nodes n ON n.id = cm.node_id
		LEFT JOIN cluster_node_group_memberships ngm ON ngm.cluster_id = cm.cluster_id AND ngm.node_id = cm.node_id
		LEFT JOIN cluster_node_groups ng ON ng.cluster_id = ngm.cluster_id AND ng.id = ngm.group_id
		LEFT JOIN LATERAL (
			SELECT p.enabled, p.target_version
			FROM node_update_desired_policies p
			WHERE p.cluster_id = cm.cluster_id
			  AND p.node_id = cm.node_id
			  AND p.product = 'rap-node-agent'
			  AND p.enabled
			ORDER BY p.updated_at DESC
			LIMIT 1
		) update_policy ON true
		LEFT JOIN LATERAL (
			SELECT s.target_version, s.phase, s.status
			FROM node_update_status_reports s
			WHERE s.cluster_id = cm.cluster_id
			  AND s.node_id = cm.node_id
			  AND s.product = 'rap-node-agent'
			ORDER BY s.observed_at DESC
			LIMIT 1
		) update_status ON true
		WHERE cm.cluster_id = $1::uuid
		  AND cm.node_id = $2::uuid
	`, input.ClusterID, input.NodeID, nodeHeartbeatStaleIntervalSQL)
	item, err := scanClusterNode(row)
	if err != nil {
		return ClusterNode{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return ClusterNode{}, err
	}
	return item, nil
}

func (s *PostgresStore) AssignNodeToGroup(ctx context.Context, input AssignNodeGroupInput) (ClusterNode, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return ClusterNode{}, err
	}
	defer tx.Rollback(ctx)

	now := time.Now().UTC()
	if input.GroupID == nil {
		tag, err := tx.Exec(ctx, `
			DELETE FROM cluster_node_group_memberships
			WHERE cluster_id = $1::uuid
			  AND node_id = $2::uuid
			  AND EXISTS (
			      SELECT 1
			      FROM cluster_memberships cm
			      WHERE cm.cluster_id = $1::uuid
			        AND cm.node_id = $2::uuid
			        AND cm.membership_status <> 'revoked'
			  )
		`, input.ClusterID, input.NodeID)
		if err != nil {
			return ClusterNode{}, err
		}
		if tag.RowsAffected() == 0 {
			var exists bool
			if err := tx.QueryRow(ctx, `
				SELECT EXISTS (
					SELECT 1
					FROM cluster_memberships
					WHERE cluster_id = $1::uuid
					  AND node_id = $2::uuid
					  AND membership_status <> 'revoked'
				)
			`, input.ClusterID, input.NodeID).Scan(&exists); err != nil {
				return ClusterNode{}, err
			}
			if !exists {
				return ClusterNode{}, pgx.ErrNoRows
			}
		}
	} else {
		tag, err := tx.Exec(ctx, `
			INSERT INTO cluster_node_group_memberships (
				cluster_id, node_id, group_id, assigned_by_user_id, assigned_at, metadata
			)
			SELECT $1::uuid, $2::uuid, $3::uuid, $4::uuid, $5, '{}'::jsonb
			WHERE EXISTS (
			    SELECT 1
			    FROM cluster_memberships cm
			    WHERE cm.cluster_id = $1::uuid
			      AND cm.node_id = $2::uuid
			      AND cm.membership_status <> 'revoked'
			)
			  AND EXISTS (
			    SELECT 1
			    FROM cluster_node_groups ng
			    WHERE ng.cluster_id = $1::uuid
			      AND ng.id = $3::uuid
			)
			ON CONFLICT (cluster_id, node_id) DO UPDATE SET
				group_id = EXCLUDED.group_id,
				assigned_by_user_id = EXCLUDED.assigned_by_user_id,
				assigned_at = EXCLUDED.assigned_at
		`, input.ClusterID, input.NodeID, input.GroupID, input.ActorUserID, now)
		if err != nil {
			return ClusterNode{}, err
		}
		if tag.RowsAffected() != 1 {
			return ClusterNode{}, pgx.ErrNoRows
		}
	}

	auditPayload := json.RawMessage(`{"group_id":null}`)
	if input.GroupID != nil {
		auditPayload = json.RawMessage(fmt.Sprintf(`{"group_id":%q}`, *input.GroupID))
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_audit_events (cluster_id, actor_user_id, event_type, target_type, target_id, payload, created_at)
		VALUES ($1::uuid, $2::uuid, 'cluster_node_group.assigned', 'node', $3, $4::jsonb, $5)
	`, input.ClusterID, input.ActorUserID, input.NodeID, auditPayload, now); err != nil {
		return ClusterNode{}, err
	}

	row := tx.QueryRow(ctx, `
		SELECT n.id::text, n.owner_organization_id::text, n.node_key, n.name, n.ownership_type,
		       n.registration_status,
		       CASE
		           WHEN n.registration_status = 'active'
		            AND COALESCE(n.last_seen_at, n.updated_at, n.created_at) < NOW() - $3::interval THEN 'offline'
		           ELSE n.health_status
		       END AS health_status,
		       CASE
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version = update_policy.target_version THEN 'current'
		           WHEN update_status.status IN ('failed', 'error') THEN 'failed'
		           WHEN update_status.phase = 'rollback' OR update_status.status = 'rolled_back' THEN 'rollback'
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version IS DISTINCT FROM update_policy.target_version
		            AND update_status.target_version = update_policy.target_version
		            AND update_status.phase IN ('planned', 'download', 'apply', 'health_check')
		            AND update_status.status IN ('accepted', 'started', 'staged', 'running') THEN 'updating'
		           WHEN update_policy.enabled
		            AND update_policy.target_version IS NOT NULL
		            AND n.reported_version IS DISTINCT FROM update_policy.target_version THEN 'outdated'
		           ELSE n.version_state
		       END AS version_state,
		       n.partition_state,
		       n.reported_version, n.last_seen_at, cm.membership_status, cm.metadata,
		       ng.id::text, ng.name,
		       n.created_at, n.updated_at
		FROM cluster_memberships cm
		JOIN nodes n ON n.id = cm.node_id
		LEFT JOIN cluster_node_group_memberships ngm ON ngm.cluster_id = cm.cluster_id AND ngm.node_id = cm.node_id
		LEFT JOIN cluster_node_groups ng ON ng.cluster_id = ngm.cluster_id AND ng.id = ngm.group_id
		LEFT JOIN LATERAL (
			SELECT p.enabled, p.target_version
			FROM node_update_desired_policies p
			WHERE p.cluster_id = cm.cluster_id
			  AND p.node_id = cm.node_id
			  AND p.product = 'rap-node-agent'
			  AND p.enabled
			ORDER BY p.updated_at DESC
			LIMIT 1
		) update_policy ON true
		LEFT JOIN LATERAL (
			SELECT s.target_version, s.phase, s.status
			FROM node_update_status_reports s
			WHERE s.cluster_id = cm.cluster_id
			  AND s.node_id = cm.node_id
			  AND s.product = 'rap-node-agent'
			ORDER BY s.observed_at DESC
			LIMIT 1
		) update_status ON true
		WHERE cm.cluster_id = $1::uuid
		  AND cm.node_id = $2::uuid
	`, input.ClusterID, input.NodeID, nodeHeartbeatStaleIntervalSQL)
	item, err := scanClusterNode(row)
	if err != nil {
		return ClusterNode{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return ClusterNode{}, err
	}
	return item, nil
}

func (s *PostgresStore) RecordHeartbeat(ctx context.Context, input RecordHeartbeatInput) (NodeHeartbeat, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return NodeHeartbeat{}, err
	}
	defer tx.Rollback(ctx)

	id := uuid.NewString()
	now := time.Now().UTC()
	row := tx.QueryRow(ctx, `
		INSERT INTO node_heartbeats (
			id, cluster_id, node_id, health_status, reported_version, capabilities, service_states, metadata, observed_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, $5, $6::jsonb, $7::jsonb, $8::jsonb, $9)
		RETURNING id::text, cluster_id::text, node_id::text, health_status, reported_version,
		          capabilities, service_states, metadata, observed_at
	`, id, input.ClusterID, input.NodeID, input.HealthStatus, input.ReportedVersion, []byte(input.Capabilities), []byte(input.ServiceStates), []byte(input.Metadata), now)
	heartbeat, err := scanHeartbeat(row)
	if err != nil {
		return NodeHeartbeat{}, err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO node_latest_heartbeats (
			cluster_id, node_id, heartbeat_id, health_status, reported_version, capabilities, service_states, metadata, observed_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, $5, $6::jsonb, $7::jsonb, $8::jsonb, $9)
		ON CONFLICT (cluster_id, node_id) DO UPDATE SET
			heartbeat_id = EXCLUDED.heartbeat_id,
			health_status = EXCLUDED.health_status,
			reported_version = EXCLUDED.reported_version,
			capabilities = EXCLUDED.capabilities,
			service_states = EXCLUDED.service_states,
			metadata = EXCLUDED.metadata,
			observed_at = EXCLUDED.observed_at
	`, input.ClusterID, input.NodeID, heartbeat.ID, heartbeat.HealthStatus, heartbeat.ReportedVersion, []byte(heartbeat.Capabilities), []byte(heartbeat.ServiceStates), []byte(heartbeat.Metadata), heartbeat.ObservedAt); err != nil {
		return NodeHeartbeat{}, err
	}
	if _, err := tx.Exec(ctx, `
		UPDATE nodes
		SET health_status = $2,
		    reported_version = COALESCE($3, reported_version),
		    last_seen_at = $4,
		    updated_at = $4
		WHERE id = $1::uuid
	`, input.NodeID, input.HealthStatus, input.ReportedVersion, heartbeat.ObservedAt); err != nil {
		return NodeHeartbeat{}, err
	}
	if _, err := tx.Exec(ctx, `
		UPDATE cluster_memberships
		SET last_seen_at = $3
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
	`, input.ClusterID, input.NodeID, heartbeat.ObservedAt); err != nil {
		return NodeHeartbeat{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return NodeHeartbeat{}, err
	}
	return heartbeat, nil
}

func (s *PostgresStore) ListNodeHeartbeats(ctx context.Context, clusterID, nodeID string, limit int) ([]NodeHeartbeat, error) {
	if limit <= 0 || limit > 500 {
		limit = 100
	}
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, node_id::text, health_status, reported_version,
		       capabilities, service_states, metadata, observed_at
		FROM node_heartbeats
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
		ORDER BY observed_at DESC
		LIMIT $3
	`, clusterID, nodeID, limit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeHeartbeat
	for rows.Next() {
		item, err := scanHeartbeat(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) CreateReleaseVersion(ctx context.Context, input CreateReleaseVersionInput) (ReleaseVersion, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return ReleaseVersion{}, err
	}
	defer tx.Rollback(ctx)

	releaseID := uuid.NewString()
	row := tx.QueryRow(ctx, `
		INSERT INTO release_versions (
			id, cluster_id, product, version, channel, status, compatibility, changelog, created_by_user_id, created_at
		) VALUES ($1::uuid, $2::uuid, $3, $4, $5, $6, $7::jsonb, $8, $9::uuid, NOW())
		RETURNING id::text, cluster_id::text, product, version, channel, status, compatibility,
		          changelog, created_by_user_id::text, created_at, authority_payload, authority_signature
	`, releaseID, input.ClusterID, input.Product, input.Version, input.Channel, input.Status, []byte(input.Compatibility), input.Changelog, input.ActorUserID)
	item, err := scanReleaseVersion(row)
	if err != nil {
		return ReleaseVersion{}, err
	}
	for _, artifact := range input.Artifacts {
		artifactID := uuid.NewString()
		row := tx.QueryRow(ctx, `
			INSERT INTO release_artifacts (
				id, release_id, cluster_id, product, version, os, arch, install_type, kind,
				url, sha256, size_bytes, signature, metadata, created_at
			) VALUES (
				$1::uuid, $2::uuid, $3::uuid, $4, $5, $6, $7, $8, $9,
				$10, $11, $12, $13, $14::jsonb, NOW()
			)
			RETURNING id::text, release_id::text, cluster_id::text, product, version, os, arch,
			          install_type, kind, url, sha256, size_bytes, signature, metadata, created_at
		`, artifactID, releaseID, input.ClusterID, input.Product, input.Version, artifact.OS, artifact.Arch, artifact.InstallType, artifact.Kind, artifact.URL, artifact.SHA256, artifact.SizeBytes, artifact.Signature, []byte(artifact.Metadata))
		storedArtifact, err := scanReleaseArtifact(row)
		if err != nil {
			return ReleaseVersion{}, err
		}
		item.Artifacts = append(item.Artifacts, storedArtifact)
	}
	if err := tx.Commit(ctx); err != nil {
		return ReleaseVersion{}, err
	}
	return item, nil
}

func (s *PostgresStore) ListReleaseVersions(ctx context.Context, clusterID, product, channel string) ([]ReleaseVersion, error) {
	query := `
		SELECT id::text, cluster_id::text, product, version, channel, status, compatibility,
		       changelog, created_by_user_id::text, created_at, authority_payload, authority_signature
		FROM release_versions
		WHERE cluster_id = $1::uuid
		  AND ($2 = '' OR product = $2)
		  AND ($3 = '' OR channel = $3)
		ORDER BY created_at DESC, version DESC
	`
	rows, err := s.db.Query(ctx, query, clusterID, product, channel)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []ReleaseVersion
	for rows.Next() {
		item, err := scanReleaseVersion(rows)
		if err != nil {
			return nil, err
		}
		artifacts, err := s.listReleaseArtifacts(ctx, item.ID)
		if err != nil {
			return nil, err
		}
		item.Artifacts = artifacts
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) listReleaseArtifacts(ctx context.Context, releaseID string) ([]ReleaseArtifact, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, release_id::text, cluster_id::text, product, version, os, arch,
		       install_type, kind, url, sha256, size_bytes, signature, metadata, created_at
		FROM release_artifacts
		WHERE release_id = $1::uuid
		ORDER BY os, arch, install_type, kind
	`, releaseID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []ReleaseArtifact
	for rows.Next() {
		item, err := scanReleaseArtifact(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) GetReleaseArtifact(ctx context.Context, clusterID, artifactID string) (ReleaseArtifact, error) {
	row := s.db.QueryRow(ctx, `
		SELECT id::text, release_id::text, cluster_id::text, product, version, os, arch,
		       install_type, kind, url, sha256, size_bytes, signature, metadata, created_at
		FROM release_artifacts
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
	`, clusterID, artifactID)
	return scanReleaseArtifact(row)
}

func (s *PostgresStore) ListNodeUpdateServiceCandidates(ctx context.Context, clusterID string) ([]NodeUpdateServiceCandidate, error) {
	rows, err := s.db.Query(ctx, `
		SELECT n.id::text,
		       n.name,
		       COALESCE(lh.metadata #>> '{mesh_endpoint_report,peer_endpoint}', '') AS endpoint,
		       COALESCE(lh.metadata #>> '{mesh_endpoint_report,region}', '') AS region,
		       n.last_seen_at
		FROM node_role_assignments r
		JOIN nodes n ON n.id = r.node_id
		JOIN cluster_memberships cm ON cm.cluster_id = r.cluster_id AND cm.node_id = r.node_id
		LEFT JOIN node_latest_heartbeats lh ON lh.cluster_id = r.cluster_id AND lh.node_id = r.node_id
		WHERE r.cluster_id = $1::uuid
		  AND r.role = 'update-cache'
		  AND r.status = 'active'
		  AND cm.membership_status = 'active'
		  AND n.registration_status = 'active'
		  AND n.health_status = 'healthy'
		  AND COALESCE(n.last_seen_at, n.updated_at, n.created_at) >= NOW() - $2::interval
		ORDER BY
		  CASE WHEN COALESCE(lh.metadata #>> '{mesh_endpoint_report,peer_endpoint}', '') = '' THEN 1 ELSE 0 END,
		  n.last_seen_at DESC NULLS LAST,
		  n.name ASC
	`, clusterID, nodeHeartbeatStaleIntervalSQL)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeUpdateServiceCandidate
	for rows.Next() {
		var item NodeUpdateServiceCandidate
		if err := rows.Scan(&item.NodeID, &item.NodeName, &item.Endpoint, &item.Region, &item.LastSeenAt); err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) UpsertNodeUpdatePolicy(ctx context.Context, input UpsertNodeUpdatePolicyInput) (NodeUpdatePolicy, error) {
	row := s.db.QueryRow(ctx, `
		INSERT INTO node_update_desired_policies (
			cluster_id, node_id, product, channel, target_version, strategy, enabled,
			rollback_allowed, health_window_seconds, updated_by_user_id, updated_at
		) VALUES (
			$1::uuid, $2::uuid, $3, $4, $5, $6, $7, $8, $9, $10::uuid, NOW()
		)
		ON CONFLICT (cluster_id, node_id, product) DO UPDATE SET
			channel = EXCLUDED.channel,
			target_version = EXCLUDED.target_version,
			strategy = EXCLUDED.strategy,
			enabled = EXCLUDED.enabled,
			rollback_allowed = EXCLUDED.rollback_allowed,
			health_window_seconds = EXCLUDED.health_window_seconds,
			updated_by_user_id = EXCLUDED.updated_by_user_id,
			updated_at = NOW()
		RETURNING cluster_id::text, node_id::text, product, channel, target_version,
		          strategy, enabled, rollback_allowed, health_window_seconds,
		          updated_by_user_id::text, updated_at
	`, input.ClusterID, input.NodeID, input.Product, input.Channel, input.TargetVersion, input.Strategy, input.Enabled, input.RollbackAllowed, input.HealthWindowSec, input.ActorUserID)
	return scanNodeUpdatePolicy(row)
}

func (s *PostgresStore) GetNodeUpdatePolicy(ctx context.Context, clusterID, nodeID, product string) (NodeUpdatePolicy, error) {
	row := s.db.QueryRow(ctx, `
		SELECT cluster_id::text, node_id::text, product, channel, target_version,
		       strategy, enabled, rollback_allowed, health_window_seconds,
		       updated_by_user_id::text, updated_at
		FROM node_update_desired_policies
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
		  AND product = $3
	`, clusterID, nodeID, product)
	return scanNodeUpdatePolicy(row)
}

func (s *PostgresStore) ReportNodeUpdateStatus(ctx context.Context, input ReportNodeUpdateStatusInput) (NodeUpdateStatus, error) {
	id := uuid.NewString()
	row := s.db.QueryRow(ctx, `
		INSERT INTO node_update_status_reports (
			id, cluster_id, node_id, product, current_version, target_version, phase, status,
			attempt_id, error_message, rollback_version, payload, observed_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, $5, $6, $7, $8, $9, $10, $11, $12::jsonb, $13)
		RETURNING id::text, cluster_id::text, node_id::text, product, current_version,
		          target_version, phase, status, attempt_id, error_message, rollback_version,
		          payload, observed_at
	`, id, input.ClusterID, input.NodeID, input.Product, input.CurrentVersion, input.TargetVersion, input.Phase, input.Status, input.AttemptID, input.ErrorMessage, input.RollbackVersion, []byte(input.Payload), input.ObservedAt)
	return scanNodeUpdateStatus(row)
}

func (s *PostgresStore) ListNodeUpdateStatuses(ctx context.Context, clusterID, nodeID string, limit int) ([]NodeUpdateStatus, error) {
	if limit <= 0 || limit > 200 {
		limit = 50
	}
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, node_id::text, product, current_version, target_version,
		       phase, status, attempt_id, error_message, rollback_version, payload, observed_at
		FROM node_update_status_reports
		WHERE cluster_id = $1::uuid AND node_id = $2::uuid
		ORDER BY observed_at DESC
		LIMIT $3
	`, clusterID, nodeID, limit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	out := []NodeUpdateStatus{}
	for rows.Next() {
		item, err := scanNodeUpdateStatus(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) RevokeNodeIdentity(ctx context.Context, input RevokeNodeIdentityInput) error {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return err
	}
	defer tx.Rollback(ctx)
	now := time.Now().UTC()
	tag, err := tx.Exec(ctx, `
		UPDATE node_identities
		SET identity_status = 'revoked',
		    revoked_at = $3,
		    updated_at = $3,
		    metadata = metadata || $4::jsonb
		WHERE node_id = $1::uuid
		  AND EXISTS (
		      SELECT 1 FROM cluster_memberships cm
		      WHERE cm.cluster_id = $2::uuid
		        AND cm.node_id = node_identities.node_id
		  )
	`, input.NodeID, input.ClusterID, now, []byte(fmt.Sprintf(`{"revocation_reason":%q}`, input.Reason)))
	if err != nil {
		return err
	}
	if tag.RowsAffected() != 1 {
		return pgx.ErrNoRows
	}
	if _, err := tx.Exec(ctx, `
		UPDATE nodes
		SET registration_status = 'revoked',
		    updated_at = $2
		WHERE id = $1::uuid
	`, input.NodeID, now); err != nil {
		return err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_audit_events (cluster_id, actor_user_id, event_type, target_type, target_id, payload, created_at)
		VALUES ($1::uuid, $2::uuid, 'node_identity.revoked', 'node', $3, $4::jsonb, $5)
	`, input.ClusterID, input.ActorUserID, input.NodeID, []byte(fmt.Sprintf(`{"reason":%q}`, input.Reason)), now); err != nil {
		return err
	}
	return tx.Commit(ctx)
}

func (s *PostgresStore) DisableClusterMembership(ctx context.Context, input DisableMembershipInput) error {
	now := time.Now().UTC()
	tag, err := s.db.Exec(ctx, `
		UPDATE cluster_memberships
		SET membership_status = 'disabled',
		    metadata = metadata || $4::jsonb
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
		  AND membership_status <> 'revoked'
	`, input.ClusterID, input.NodeID, now, []byte(fmt.Sprintf(`{"disabled_reason":%q,"disabled_at":%q}`, input.Reason, now.Format(time.RFC3339Nano))))
	if err != nil {
		return err
	}
	if tag.RowsAffected() != 1 {
		return pgx.ErrNoRows
	}
	return s.RecordAudit(ctx, ClusterAuditEvent{
		ClusterID:   &input.ClusterID,
		ActorUserID: &input.ActorUserID,
		EventType:   "cluster_membership.disabled",
		TargetType:  "node",
		TargetID:    &input.NodeID,
		Payload:     json.RawMessage(fmt.Sprintf(`{"reason":%q}`, input.Reason)),
		CreatedAt:   now,
	})
}

func (s *PostgresStore) DeleteClusterNode(ctx context.Context, input DeleteClusterNodeInput) error {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return err
	}
	defer tx.Rollback(ctx)
	now := time.Now().UTC()
	var nodeName string
	if err := tx.QueryRow(ctx, `
		SELECT n.name
		FROM cluster_memberships cm
		JOIN nodes n ON n.id = cm.node_id
		WHERE cm.cluster_id = $1::uuid
		  AND cm.node_id = $2::uuid
	`, input.ClusterID, input.NodeID).Scan(&nodeName); err != nil {
		return err
	}
	auditPayload, err := json.Marshal(map[string]any{
		"reason":     input.Reason,
		"node_name":  nodeName,
		"deleted_at": now.Format(time.RFC3339Nano),
	})
	if err != nil {
		return err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO cluster_audit_events (cluster_id, actor_user_id, event_type, target_type, target_id, payload, created_at)
		VALUES ($1::uuid, $2::uuid, 'cluster_node.deleted', 'node', $3, $4::jsonb, $5)
	`, input.ClusterID, input.ActorUserID, input.NodeID, auditPayload, now); err != nil {
		return err
	}
	if _, err := tx.Exec(ctx, `
		UPDATE node_identities
		SET identity_status = 'revoked',
		    revoked_at = COALESCE(revoked_at, $2),
		    updated_at = $2,
		    metadata = metadata || $3::jsonb
		WHERE node_id = $1::uuid
	`, input.NodeID, now, []byte(fmt.Sprintf(`{"revocation_reason":%q,"revoked_by_delete":true}`, input.Reason))); err != nil {
		return err
	}
	if _, err := tx.Exec(ctx, `
		DELETE FROM cluster_node_group_memberships
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
	`, input.ClusterID, input.NodeID); err != nil {
		return err
	}
	tag, err := tx.Exec(ctx, `
		DELETE FROM cluster_memberships
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
	`, input.ClusterID, input.NodeID)
	if err != nil {
		return err
	}
	if tag.RowsAffected() != 1 {
		return pgx.ErrNoRows
	}
	if _, err := tx.Exec(ctx, `
		DELETE FROM nodes n
		WHERE n.id = $1::uuid
		  AND NOT EXISTS (
		      SELECT 1
		      FROM cluster_memberships cm
		      WHERE cm.node_id = n.id
		  )
	`, input.NodeID); err != nil {
		return err
	}
	return tx.Commit(ctx)
}

func (s *PostgresStore) UpsertFabricTestingFlag(ctx context.Context, input UpsertFabricTestingFlagInput) (FabricTestingFlag, error) {
	if input.HistoryRetentionHours <= 0 {
		input.HistoryRetentionHours = 24
	}
	if len(input.Metadata) == 0 {
		input.Metadata = json.RawMessage(`{}`)
	}
	row := s.db.QueryRow(ctx, `
		UPDATE fabric_testing_flags
		SET enabled = $4,
		    telemetry_enabled = $5,
		    synthetic_links_enabled = $6,
		    history_retention_hours = $7,
		    metadata = $8::jsonb,
		    updated_by_user_id = $9::uuid,
		    updated_at = NOW()
		WHERE scope_type = $1
		  AND COALESCE(scope_id, '00000000-0000-0000-0000-000000000000'::uuid) = COALESCE($2::uuid, '00000000-0000-0000-0000-000000000000'::uuid)
		  AND COALESCE(cluster_id, '00000000-0000-0000-0000-000000000000'::uuid) = COALESCE($3::uuid, '00000000-0000-0000-0000-000000000000'::uuid)
		RETURNING id::text, scope_type, scope_id::text, cluster_id::text, enabled, telemetry_enabled,
		          synthetic_links_enabled, history_retention_hours, metadata, updated_by_user_id::text, updated_at
	`, input.ScopeType, input.ScopeID, input.ClusterID, input.Enabled, input.TelemetryEnabled, input.SyntheticLinksEnabled, input.HistoryRetentionHours, []byte(input.Metadata), input.ActorUserID)
	item, err := scanFabricTestingFlag(row)
	if err == nil {
		return item, nil
	}
	if !errors.Is(err, pgx.ErrNoRows) {
		return FabricTestingFlag{}, err
	}
	row = s.db.QueryRow(ctx, `
		INSERT INTO fabric_testing_flags (
			id, scope_type, scope_id, cluster_id, enabled, telemetry_enabled, synthetic_links_enabled,
			history_retention_hours, metadata, updated_by_user_id, updated_at
		) VALUES ($1::uuid, $2, $3::uuid, $4::uuid, $5, $6, $7, $8, $9::jsonb, $10::uuid, NOW())
		RETURNING id::text, scope_type, scope_id::text, cluster_id::text, enabled, telemetry_enabled,
		          synthetic_links_enabled, history_retention_hours, metadata, updated_by_user_id::text, updated_at
	`, uuid.NewString(), input.ScopeType, input.ScopeID, input.ClusterID, input.Enabled, input.TelemetryEnabled, input.SyntheticLinksEnabled, input.HistoryRetentionHours, []byte(input.Metadata), input.ActorUserID)
	return scanFabricTestingFlag(row)
}

func (s *PostgresStore) ListFabricTestingFlags(ctx context.Context) ([]FabricTestingFlag, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, scope_type, scope_id::text, cluster_id::text, enabled, telemetry_enabled,
		       synthetic_links_enabled, history_retention_hours, metadata, updated_by_user_id::text, updated_at
		FROM fabric_testing_flags
		ORDER BY scope_type, updated_at DESC
	`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []FabricTestingFlag
	for rows.Next() {
		item, err := scanFabricTestingFlag(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) GetEffectiveNodeTestingFlags(ctx context.Context, clusterID, nodeID string) (EffectiveNodeTestingFlags, error) {
	rows, err := s.db.Query(ctx, `
		WITH node_scope AS (
		    SELECT n.owner_organization_id
		    FROM nodes n
		    JOIN cluster_memberships cm ON cm.node_id = n.id AND cm.cluster_id = $1::uuid
		    WHERE n.id = $2::uuid
		)
		SELECT f.scope_type, f.enabled, f.telemetry_enabled, f.synthetic_links_enabled,
		       f.history_retention_hours, f.metadata
		FROM fabric_testing_flags f
		LEFT JOIN node_scope ns ON TRUE
		WHERE (
		    f.scope_type = 'platform'
		    OR (f.scope_type = 'organization' AND f.scope_id = ns.owner_organization_id)
		    OR (f.scope_type = 'node' AND f.scope_id = $2::uuid)
		)
		  AND (f.cluster_id IS NULL OR f.cluster_id = $1::uuid)
		ORDER BY CASE f.scope_type
		    WHEN 'platform' THEN 1
		    WHEN 'organization' THEN 2
		    WHEN 'node' THEN 3
		    ELSE 4
		END
	`, clusterID, nodeID)
	if err != nil {
		return EffectiveNodeTestingFlags{}, err
	}
	defer rows.Close()
	out := EffectiveNodeTestingFlags{HistoryRetentionHours: 24, Metadata: json.RawMessage(`{}`)}
	for rows.Next() {
		var scope string
		var metadata json.RawMessage
		var retention int
		var enabled, telemetry, links bool
		if err := rows.Scan(&scope, &enabled, &telemetry, &links, &retention, &metadata); err != nil {
			return EffectiveNodeTestingFlags{}, err
		}
		if enabled {
			out.Enabled = true
		}
		if telemetry {
			out.TelemetryEnabled = true
		}
		if links {
			out.SyntheticLinksEnabled = true
		}
		if retention > 0 {
			out.HistoryRetentionHours = retention
		}
		out.AppliedScopes = append(out.AppliedScopes, scope)
		if len(metadata) > 0 && string(metadata) != "{}" {
			out.Metadata = metadata
		}
	}
	return out, rows.Err()
}

func (s *PostgresStore) RecordNodeTelemetry(ctx context.Context, input RecordNodeTelemetryInput) (NodeTelemetryObservation, error) {
	if input.ObservedAt.IsZero() {
		input.ObservedAt = time.Now().UTC()
	}
	if len(input.Payload) == 0 {
		input.Payload = json.RawMessage(`{}`)
	}
	row := s.db.QueryRow(ctx, `
		INSERT INTO node_telemetry_observations (
			id, cluster_id, node_id, cpu_percent, memory_used_bytes, memory_total_bytes,
			disk_used_bytes, disk_total_bytes, network_rx_bytes, network_tx_bytes,
			process_count, payload, observed_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, $5, $6, $7, $8, $9, $10, $11, $12::jsonb, $13)
		RETURNING id::text, cluster_id::text, node_id::text, cpu_percent, memory_used_bytes,
		          memory_total_bytes, disk_used_bytes, disk_total_bytes, network_rx_bytes,
		          network_tx_bytes, process_count, payload, observed_at
	`, uuid.NewString(), input.ClusterID, input.NodeID, input.CPUPercent, input.MemoryUsedBytes, input.MemoryTotalBytes, input.DiskUsedBytes, input.DiskTotalBytes, input.NetworkRxBytes, input.NetworkTxBytes, input.ProcessCount, []byte(input.Payload), input.ObservedAt)
	return scanNodeTelemetry(row)
}

func (s *PostgresStore) ListNodeTelemetry(ctx context.Context, clusterID, nodeID string, limit int) ([]NodeTelemetryObservation, error) {
	if limit <= 0 || limit > 1000 {
		limit = 240
	}
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, node_id::text, cpu_percent, memory_used_bytes,
		       memory_total_bytes, disk_used_bytes, disk_total_bytes, network_rx_bytes,
		       network_tx_bytes, process_count, payload, observed_at
		FROM node_telemetry_observations
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
		ORDER BY observed_at DESC
		LIMIT $3
	`, clusterID, nodeID, limit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeTelemetryObservation
	for rows.Next() {
		item, err := scanNodeTelemetry(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) SetDesiredWorkload(ctx context.Context, input SetDesiredWorkloadInput) (NodeWorkloadDesiredState, error) {
	row := s.db.QueryRow(ctx, `
		INSERT INTO node_workload_desired_states (
			cluster_id, node_id, service_type, desired_state, version, runtime_mode,
			artifact_ref, config, environment, updated_by_user_id, updated_at
		) VALUES ($1::uuid, $2::uuid, $3, $4, $5, $6, $7, $8::jsonb, $9::jsonb, $10::uuid, NOW())
		ON CONFLICT (cluster_id, node_id, service_type) DO UPDATE SET
			desired_state = EXCLUDED.desired_state,
			version = EXCLUDED.version,
			runtime_mode = EXCLUDED.runtime_mode,
			artifact_ref = EXCLUDED.artifact_ref,
			config = EXCLUDED.config,
			environment = EXCLUDED.environment,
			updated_by_user_id = EXCLUDED.updated_by_user_id,
			updated_at = EXCLUDED.updated_at
		RETURNING cluster_id::text, node_id::text, service_type, desired_state, version, runtime_mode,
		          artifact_ref, config, environment, updated_by_user_id::text, updated_at
	`, input.ClusterID, input.NodeID, input.ServiceType, input.DesiredState, input.Version, input.RuntimeMode, input.ArtifactRef, []byte(input.Config), []byte(input.Environment), input.ActorUserID)
	return scanDesiredWorkload(row)
}

func (s *PostgresStore) ListDesiredWorkloads(ctx context.Context, clusterID, nodeID string) ([]NodeWorkloadDesiredState, error) {
	rows, err := s.db.Query(ctx, `
		SELECT cluster_id::text, node_id::text, service_type, desired_state, version, runtime_mode,
		       artifact_ref, config, environment, updated_by_user_id::text, updated_at
		FROM node_workload_desired_states
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
		ORDER BY service_type
	`, clusterID, nodeID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeWorkloadDesiredState
	for rows.Next() {
		item, err := scanDesiredWorkload(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) ReportWorkloadStatus(ctx context.Context, input ReportWorkloadStatusInput) (NodeWorkloadStatus, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return NodeWorkloadStatus{}, err
	}
	defer tx.Rollback(ctx)

	id := uuid.NewString()
	row := tx.QueryRow(ctx, `
		INSERT INTO node_workload_status_reports (
			id, cluster_id, node_id, service_type, reported_state, runtime_mode, version, status_payload, observed_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, $5, $6, $7, $8::jsonb, NOW())
		RETURNING id::text, cluster_id::text, node_id::text, service_type, reported_state,
		          runtime_mode, version, status_payload, observed_at
	`, id, input.ClusterID, input.NodeID, input.ServiceType, input.ReportedState, input.RuntimeMode, input.Version, []byte(input.StatusPayload))
	status, err := scanWorkloadStatus(row)
	if err != nil {
		return NodeWorkloadStatus{}, err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO node_workload_latest_statuses (
			cluster_id, node_id, service_type, status_report_id, reported_state, runtime_mode, version, status_payload, observed_at
		) VALUES ($1::uuid, $2::uuid, $3, $4::uuid, $5, $6, $7, $8::jsonb, $9)
		ON CONFLICT (cluster_id, node_id, service_type) DO UPDATE SET
			status_report_id = EXCLUDED.status_report_id,
			reported_state = EXCLUDED.reported_state,
			runtime_mode = EXCLUDED.runtime_mode,
			version = EXCLUDED.version,
			status_payload = EXCLUDED.status_payload,
			observed_at = EXCLUDED.observed_at
	`, status.ClusterID, status.NodeID, status.ServiceType, status.ID, status.ReportedState, status.RuntimeMode, status.Version, []byte(status.StatusPayload), status.ObservedAt); err != nil {
		return NodeWorkloadStatus{}, err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO node_services (node_id, service_type, enabled, desired_state, reported_state, last_reported_at, metadata, updated_at)
		VALUES ($1::uuid, $2, FALSE, 'disabled', $3, $4, $5::jsonb, $4)
		ON CONFLICT (node_id, service_type) DO UPDATE SET
			reported_state = EXCLUDED.reported_state,
			last_reported_at = EXCLUDED.last_reported_at,
			metadata = EXCLUDED.metadata,
			updated_at = EXCLUDED.updated_at
	`, status.NodeID, status.ServiceType, status.ReportedState, status.ObservedAt, []byte(status.StatusPayload)); err != nil {
		return NodeWorkloadStatus{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return NodeWorkloadStatus{}, err
	}
	return status, nil
}

func (s *PostgresStore) ListLatestWorkloadStatuses(ctx context.Context, clusterID, nodeID string) ([]NodeWorkloadStatus, error) {
	rows, err := s.db.Query(ctx, `
		SELECT COALESCE(status_report_id::text, '00000000-0000-0000-0000-000000000000'), cluster_id::text, node_id::text,
		       service_type, reported_state, runtime_mode, version, status_payload, observed_at
		FROM node_workload_latest_statuses
		WHERE cluster_id = $1::uuid
		  AND node_id = $2::uuid
		ORDER BY service_type
	`, clusterID, nodeID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeWorkloadStatus
	for rows.Next() {
		item, err := scanWorkloadStatus(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) ReportMeshLink(ctx context.Context, input ReportMeshLinkInput) (MeshLinkObservation, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return MeshLinkObservation{}, err
	}
	defer tx.Rollback(ctx)

	id := uuid.NewString()
	row := tx.QueryRow(ctx, `
		INSERT INTO mesh_link_observations (
			id, cluster_id, source_node_id, target_node_id, link_status, latency_ms, quality_score, metadata, observed_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4::uuid, $5, $6, $7, $8::jsonb, NOW())
		RETURNING id::text, cluster_id::text, source_node_id::text, target_node_id::text, link_status,
		          latency_ms, quality_score, metadata, observed_at
	`, id, input.ClusterID, input.SourceNodeID, input.TargetNodeID, input.LinkStatus, input.LatencyMs, input.QualityScore, []byte(input.Metadata))
	observation, err := scanMeshLink(row)
	if err != nil {
		return MeshLinkObservation{}, err
	}
	observationKey := meshLatestObservationKey(observation.Metadata)
	if _, err := tx.Exec(ctx, `
		INSERT INTO mesh_latest_links (
			cluster_id, source_node_id, target_node_id, observation_id, link_status, latency_ms, quality_score, metadata, observed_at, observation_key
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4::uuid, $5, $6, $7, $8::jsonb, $9, $10)
		ON CONFLICT (cluster_id, source_node_id, target_node_id, observation_key) DO UPDATE SET
			observation_id = EXCLUDED.observation_id,
			link_status = EXCLUDED.link_status,
			latency_ms = EXCLUDED.latency_ms,
			quality_score = EXCLUDED.quality_score,
			metadata = EXCLUDED.metadata,
			observed_at = EXCLUDED.observed_at
	`, observation.ClusterID, observation.SourceNodeID, observation.TargetNodeID, observation.ID, observation.LinkStatus, observation.LatencyMs, observation.QualityScore, []byte(observation.Metadata), observation.ObservedAt, observationKey); err != nil {
		return MeshLinkObservation{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return MeshLinkObservation{}, err
	}
	return observation, nil
}

func meshLatestObservationKey(metadata json.RawMessage) string {
	var values map[string]any
	if err := json.Unmarshal(metadata, &values); err != nil {
		return "default"
	}
	observationType := meshMetadataString(values, "observation_type")
	if observationType == "" {
		observationType = "default"
	}
	switch observationType {
	case "synthetic_route_health":
		if routeID := meshMetadataString(values, "route_id"); routeID != "" {
			return observationType + ":" + routeID
		}
	case "peer_connection_manager":
		transportMode := meshMetadataString(values, "transport_mode")
		relayNodeID := meshMetadataString(values, "relay_node_id")
		if transportMode != "" || relayNodeID != "" {
			return observationType + ":" + transportMode + ":" + relayNodeID
		}
	}
	return observationType
}

func meshMetadataString(values map[string]any, key string) string {
	value, ok := values[key].(string)
	if !ok {
		return ""
	}
	return value
}

func (s *PostgresStore) ListMeshLinks(ctx context.Context, clusterID string) ([]MeshLinkObservation, error) {
	rows, err := s.db.Query(ctx, `
		SELECT COALESCE(observation_id::text, '00000000-0000-0000-0000-000000000000'),
		       cluster_id::text, source_node_id::text, target_node_id::text,
		       CASE WHEN stale THEN 'stale' ELSE link_status END AS link_status,
		       latency_ms, quality_score,
		       CASE
		           WHEN stale THEN metadata || jsonb_build_object(
		               'derived_link_status', 'stale',
		               'derived_link_stale', true,
		               'derived_link_stale_reason',
		                   CASE
		                       WHEN observation_stale THEN 'observation_expired'
		                       WHEN source_stale THEN 'source_node_offline'
		                       WHEN target_stale THEN 'target_node_offline'
		                       ELSE 'endpoint_unavailable'
		                   END
		           )
		           ELSE metadata
		       END AS metadata,
		       observed_at
		FROM (
			SELECT ml.*,
			       ml.observed_at < NOW() - $2::interval AS observation_stale,
			       sn.registration_status = 'active'
			           AND COALESCE(sn.last_seen_at, sn.updated_at, sn.created_at) < NOW() - $3::interval AS source_stale,
			       tn.registration_status = 'active'
			           AND COALESCE(tn.last_seen_at, tn.updated_at, tn.created_at) < NOW() - $3::interval AS target_stale,
			       ml.observed_at < NOW() - $2::interval
			           OR (sn.registration_status = 'active'
			               AND COALESCE(sn.last_seen_at, sn.updated_at, sn.created_at) < NOW() - $3::interval)
			           OR (tn.registration_status = 'active'
			               AND COALESCE(tn.last_seen_at, tn.updated_at, tn.created_at) < NOW() - $3::interval) AS stale
			FROM mesh_latest_links ml
			JOIN nodes sn ON sn.id = ml.source_node_id
			JOIN nodes tn ON tn.id = ml.target_node_id
			WHERE ml.cluster_id = $1::uuid
		) latest
		ORDER BY observed_at DESC
	`, clusterID, meshLinkStaleIntervalSQL, nodeHeartbeatStaleIntervalSQL)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []MeshLinkObservation
	for rows.Next() {
		item, err := scanMeshLink(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) CreateRouteIntent(ctx context.Context, input CreateRouteIntentInput) (MeshRouteIntent, error) {
	id := uuid.NewString()
	row := s.db.QueryRow(ctx, `
		INSERT INTO mesh_route_intents (
			id, cluster_id, source_selector, destination_selector, service_class,
			priority, status, policy, created_by_user_id, created_at, updated_at
		) VALUES ($1::uuid, $2::uuid, $3::jsonb, $4::jsonb, $5, $6, 'active', $7::jsonb, NULLIF($8, '')::uuid, NOW(), NOW())
		RETURNING id::text, cluster_id::text, source_selector, destination_selector, service_class,
		          priority, status, policy, created_by_user_id::text, created_at, updated_at
	`, id, input.ClusterID, []byte(input.SourceSelector), []byte(input.DestinationSelector), input.ServiceClass, input.Priority, []byte(input.Policy), input.ActorUserID)
	return scanRouteIntent(row)
}

func (s *PostgresStore) ListRouteIntents(ctx context.Context, clusterID string) ([]MeshRouteIntent, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, source_selector, destination_selector, service_class,
		       priority, status, policy, created_by_user_id::text, created_at, updated_at
		FROM mesh_route_intents
		WHERE cluster_id = $1::uuid
		ORDER BY priority ASC, created_at DESC
	`, clusterID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []MeshRouteIntent
	for rows.Next() {
		item, err := scanRouteIntent(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) ExpireRouteIntent(ctx context.Context, input RouteIntentLifecycleInput, expiresAt time.Time) (MeshRouteIntent, error) {
	expiresText := expiresAt.UTC().Format(time.RFC3339Nano)
	reason := strings.TrimSpace(input.Reason)
	row := s.db.QueryRow(ctx, `
		UPDATE mesh_route_intents
		SET policy = jsonb_set(
				jsonb_set(COALESCE(policy, '{}'::jsonb), '{expires_at}', to_jsonb($3::text), true),
				'{operator_expire}',
				jsonb_build_object('expired_at', $3::text, 'reason', $4::text),
				true
			),
			updated_at = NOW()
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		RETURNING id::text, cluster_id::text, source_selector, destination_selector, service_class,
		          priority, status, policy, created_by_user_id::text, created_at, updated_at
	`, input.ClusterID, input.RouteIntentID, expiresText, reason)
	return scanRouteIntent(row)
}

func (s *PostgresStore) DisableRouteIntent(ctx context.Context, input RouteIntentLifecycleInput) (MeshRouteIntent, error) {
	reason := strings.TrimSpace(input.Reason)
	disabledAt := time.Now().UTC().Format(time.RFC3339Nano)
	row := s.db.QueryRow(ctx, `
		UPDATE mesh_route_intents
		SET status = 'disabled',
			policy = jsonb_set(
				COALESCE(policy, '{}'::jsonb),
				'{operator_disable}',
				jsonb_build_object('disabled_at', $3::text, 'reason', $4::text),
				true
			),
			updated_at = NOW()
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		RETURNING id::text, cluster_id::text, source_selector, destination_selector, service_class,
		          priority, status, policy, created_by_user_id::text, created_at, updated_at
	`, input.ClusterID, input.RouteIntentID, disabledAt, reason)
	return scanRouteIntent(row)
}

func (s *PostgresStore) RecordFabricServiceChannelRouteFeedback(ctx context.Context, input RecordFabricServiceChannelRouteFeedbackInput) (FabricServiceChannelRouteFeedbackObservation, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return FabricServiceChannelRouteFeedbackObservation{}, err
	}
	defer tx.Rollback(ctx)

	id := uuid.NewString()
	observedAt := input.ObservedAt.UTC()
	if observedAt.IsZero() {
		observedAt = time.Now().UTC()
	}
	if input.FeedbackStatus != "healthy" {
		var currentPayload json.RawMessage
		err := tx.QueryRow(ctx, `
			SELECT payload
			FROM fabric_service_channel_route_feedback_latest
			WHERE cluster_id = $1::uuid
			  AND reporter_node_id = $2::uuid
			  AND route_id = $3
		`, input.ClusterID, input.ReporterNodeID, input.RouteID).Scan(&currentPayload)
		if err != nil && !errors.Is(err, pgx.ErrNoRows) {
			return FabricServiceChannelRouteFeedbackObservation{}, err
		}
		if cooldownUntil := fabricServiceChannelRetryCooldownUntil(currentPayload); cooldownUntil != nil && cooldownUntil.After(observedAt) {
			input = fabricServiceChannelFeedbackSuppressedByOperatorCooldown(input, *cooldownUntil, observedAt)
		}
	}
	expiresAt := input.ExpiresAt.UTC()
	if expiresAt.IsZero() {
		expiresAt = observedAt.Add(fabricServiceChannelFeedbackMaxAge)
	}
	row := tx.QueryRow(ctx, `
		INSERT INTO fabric_service_channel_route_feedback_observations (
			id, cluster_id, reporter_node_id, route_id, service_class, feedback_status,
			score_adjustment, reasons, last_error, consecutive_failures, stall_count,
			last_send_duration_ms, payload, observed_at, expires_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13::jsonb, $14, $15)
		RETURNING id::text, cluster_id::text, reporter_node_id::text, route_id, service_class,
		          feedback_status, score_adjustment, reasons, last_error, consecutive_failures,
		          stall_count, last_send_duration_ms, payload, observed_at, expires_at
	`, id, input.ClusterID, input.ReporterNodeID, input.RouteID, input.ServiceClass, input.FeedbackStatus, input.ScoreAdjustment,
		input.Reasons, input.LastError, input.ConsecutiveFailures, input.StallCount, input.LastSendDurationMs, []byte(input.Payload), observedAt, expiresAt)
	item, err := scanFabricServiceChannelRouteFeedback(row)
	if err != nil {
		return FabricServiceChannelRouteFeedbackObservation{}, err
	}
	if _, err := tx.Exec(ctx, `
		INSERT INTO fabric_service_channel_route_feedback_latest (
			cluster_id, reporter_node_id, route_id, observation_id, service_class, feedback_status,
			score_adjustment, reasons, last_error, consecutive_failures, stall_count,
			last_send_duration_ms, payload, observed_at, expires_at
		) VALUES ($1::uuid, $2::uuid, $3, $4::uuid, $5, $6, $7, $8, $9, $10, $11, $12, $13::jsonb, $14, $15)
		ON CONFLICT (cluster_id, reporter_node_id, route_id) DO UPDATE SET
			observation_id = EXCLUDED.observation_id,
			service_class = EXCLUDED.service_class,
			feedback_status = EXCLUDED.feedback_status,
			score_adjustment = EXCLUDED.score_adjustment,
			reasons = EXCLUDED.reasons,
			last_error = EXCLUDED.last_error,
			consecutive_failures = EXCLUDED.consecutive_failures,
			stall_count = EXCLUDED.stall_count,
			last_send_duration_ms = EXCLUDED.last_send_duration_ms,
			payload = EXCLUDED.payload,
			observed_at = EXCLUDED.observed_at,
			expires_at = EXCLUDED.expires_at
		WHERE fabric_service_channel_route_feedback_latest.observed_at <= EXCLUDED.observed_at
		  AND NOT (
		      EXCLUDED.feedback_status = 'healthy'
		      AND fabric_service_channel_route_feedback_latest.feedback_status IN ('degraded', 'fenced')
		      AND fabric_service_channel_route_feedback_latest.expires_at > EXCLUDED.observed_at
		      AND NOT (
		          EXCLUDED.consecutive_failures = 0
		          AND EXCLUDED.stall_count = 0
		          AND COALESCE(NULLIF(EXCLUDED.payload->>'quality_window_failure_count', '')::int, 0) = 0
		          AND COALESCE(NULLIF(EXCLUDED.payload->>'quality_window_drop_count', '')::int, 0) = 0
		          AND COALESCE(NULLIF(EXCLUDED.payload->>'quality_window_slow_count', '')::int, 0) = 0
		      )
		  )
	`, item.ClusterID, item.ReporterNodeID, item.RouteID, item.ID, item.ServiceClass, item.FeedbackStatus, item.ScoreAdjustment,
		item.Reasons, item.LastError, item.ConsecutiveFailures, item.StallCount, item.LastSendDurationMs, []byte(item.Payload), item.ObservedAt, item.ExpiresAt); err != nil {
		return FabricServiceChannelRouteFeedbackObservation{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return FabricServiceChannelRouteFeedbackObservation{}, err
	}
	return item, nil
}

func (s *PostgresStore) ListFabricServiceChannelRouteFeedback(ctx context.Context, input ListFabricServiceChannelRouteFeedbackInput) ([]FabricServiceChannelRouteFeedbackObservation, error) {
	now := input.Now.UTC()
	if now.IsZero() {
		now = time.Now().UTC()
	}
	rows, err := s.db.Query(ctx, `
		SELECT observation_id::text, cluster_id::text, reporter_node_id::text, route_id, service_class,
		       feedback_status, score_adjustment, reasons, last_error, consecutive_failures,
		       stall_count, last_send_duration_ms, payload, observed_at, expires_at
		FROM fabric_service_channel_route_feedback_latest
		WHERE cluster_id = $1::uuid
		  AND (NULLIF($2, '') IS NULL OR reporter_node_id = NULLIF($2, '')::uuid)
		  AND ($3 = '' OR route_id = $3)
		  AND ($4 = '' OR service_class = $4)
		  AND ($5 = '' OR feedback_status = $5)
		  AND ($6::boolean OR expires_at > $7)
		ORDER BY observed_at DESC
	`, input.ClusterID, input.ReporterNodeID, input.RouteID, input.ServiceClass, input.FeedbackStatus, input.IncludeExpired, now)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	out := []FabricServiceChannelRouteFeedbackObservation{}
	for rows.Next() {
		item, err := scanFabricServiceChannelRouteFeedback(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) StoreFabricServiceChannelLease(ctx context.Context, input StoreFabricServiceChannelLeaseInput) (FabricServiceChannelLeaseRecord, error) {
	lease := input.Lease
	if lease.ClusterID == "" || lease.ChannelID == "" || input.TokenHash == "" {
		return FabricServiceChannelLeaseRecord{}, ErrInvalidPayload
	}
	storedLease := lease
	storedLease.Token.Token = ""
	rawLease, err := json.Marshal(storedLease)
	if err != nil {
		return FabricServiceChannelLeaseRecord{}, err
	}
	row := s.db.QueryRow(ctx, `
		INSERT INTO fabric_service_channel_leases (
			cluster_id, channel_id, token_hash, resource_id, service_class,
			selected_entry_node_id, expires_at, lease, created_at, updated_at
		) VALUES (
			$1::uuid, $2::uuid, $3, $4, $5, $6::uuid, $7, $8::jsonb, NOW(), NOW()
		)
		ON CONFLICT (cluster_id, channel_id) DO UPDATE SET
			token_hash = EXCLUDED.token_hash,
			resource_id = EXCLUDED.resource_id,
			service_class = EXCLUDED.service_class,
			selected_entry_node_id = EXCLUDED.selected_entry_node_id,
			expires_at = EXCLUDED.expires_at,
			lease = EXCLUDED.lease,
			updated_at = NOW()
		RETURNING cluster_id::text, channel_id::text, token_hash, resource_id, service_class,
		          selected_entry_node_id::text, expires_at, lease, created_at, updated_at
	`, lease.ClusterID, lease.ChannelID, input.TokenHash, lease.ResourceID, lease.ServiceClass, lease.SelectedEntryNodeID, lease.ExpiresAt, rawLease)
	return scanFabricServiceChannelLeaseRecord(row)
}

func (s *PostgresStore) GetFabricServiceChannelLease(ctx context.Context, clusterID, channelID string) (FabricServiceChannelLeaseRecord, error) {
	row := s.db.QueryRow(ctx, `
		SELECT cluster_id::text, channel_id::text, token_hash, resource_id, service_class,
		       selected_entry_node_id::text, expires_at, lease, created_at, updated_at
		FROM fabric_service_channel_leases
		WHERE cluster_id = $1::uuid
		  AND channel_id = $2::uuid
	`, clusterID, channelID)
	return scanFabricServiceChannelLeaseRecord(row)
}

func (s *PostgresStore) ListFabricServiceChannelLeases(ctx context.Context, input ListFabricServiceChannelLeasesInput) ([]FabricServiceChannelLeaseRecord, error) {
	now := input.Now.UTC()
	if now.IsZero() {
		now = time.Now().UTC()
	}
	if input.Limit <= 0 || input.Limit > 500 {
		input.Limit = 100
	}
	rows, err := s.db.Query(ctx, `
		SELECT cluster_id::text, channel_id::text, token_hash, resource_id, service_class,
		       selected_entry_node_id::text, expires_at, lease, created_at, updated_at
		FROM fabric_service_channel_leases
		WHERE cluster_id = $1::uuid
		  AND ($2 = '' OR service_class = $2)
		  AND (NULLIF($3, '') IS NULL OR selected_entry_node_id = NULLIF($3, '')::uuid)
		  AND ($4 = '' OR resource_id = $4)
		  AND ($5::boolean OR expires_at > $6)
		ORDER BY expires_at DESC
		LIMIT $7
	`, input.ClusterID, input.ServiceClass, input.EntryNodeID, input.ResourceID, input.IncludeExpired, now, input.Limit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	out := []FabricServiceChannelLeaseRecord{}
	for rows.Next() {
		item, err := scanFabricServiceChannelLeaseRecord(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) CleanupExpiredFabricServiceChannelLeases(ctx context.Context, clusterID string, now time.Time, limit int) (int, error) {
	if now.IsZero() {
		now = time.Now().UTC()
	}
	if limit <= 0 || limit > 1000 {
		limit = 100
	}
	tag, err := s.db.Exec(ctx, `
		DELETE FROM fabric_service_channel_leases
		WHERE (cluster_id, channel_id) IN (
			SELECT cluster_id, channel_id
			FROM fabric_service_channel_leases
			WHERE cluster_id = $1::uuid
			  AND expires_at <= $2
			ORDER BY expires_at ASC
			LIMIT $3
		)
	`, clusterID, now.UTC(), limit)
	if err != nil {
		return 0, err
	}
	return int(tag.RowsAffected()), nil
}

func (s *PostgresStore) RecordFabricServiceChannelRouteRebuildAttempt(ctx context.Context, input RecordFabricServiceChannelRouteRebuildAttemptInput) (FabricServiceChannelRouteRebuildAttempt, error) {
	id := uuid.NewString()
	payload := defaultJSON(input.Payload, `{}`)
	row := s.db.QueryRow(ctx, `
		INSERT INTO fabric_service_channel_route_rebuild_attempts (
			id, cluster_id, reporter_node_id, service_class, route_id, replacement_route_id,
			rebuild_request_id, rebuild_status, rebuild_reason, rebuild_attempt, decision_source,
			outcome, generation, policy_fingerprint, observed_policy_fingerprint,
			observed_route_generation, effective_route_generation, feedback_status,
			feedback_score_adjustment, feedback_effective_score_adjustment, feedback_reasons,
			last_error, consecutive_failures, stall_count, last_send_duration_ms,
			quality_window_sample_count, quality_window_failure_count, quality_window_drop_count,
			quality_window_slow_count, old_hops, replacement_hops, payload
		) VALUES (
			$1::uuid, $2::uuid, $3::uuid, $4, $5, $6,
			$7, $8, $9, $10, $11,
			$12, $13, $14, $15,
			$16, $17, $18,
			$19, $20, $21,
			$22, $23, $24, $25,
			$26, $27, $28,
			$29, $30, $31, $32::jsonb
		)
		ON CONFLICT (cluster_id, reporter_node_id, service_class, route_id, rebuild_request_id) DO UPDATE SET
			replacement_route_id = EXCLUDED.replacement_route_id,
			rebuild_status = EXCLUDED.rebuild_status,
			rebuild_reason = EXCLUDED.rebuild_reason,
			rebuild_attempt = EXCLUDED.rebuild_attempt,
			decision_source = EXCLUDED.decision_source,
			outcome = EXCLUDED.outcome,
			generation = EXCLUDED.generation,
			policy_fingerprint = EXCLUDED.policy_fingerprint,
			observed_policy_fingerprint = EXCLUDED.observed_policy_fingerprint,
			observed_route_generation = EXCLUDED.observed_route_generation,
			effective_route_generation = EXCLUDED.effective_route_generation,
			feedback_status = EXCLUDED.feedback_status,
			feedback_score_adjustment = EXCLUDED.feedback_score_adjustment,
			feedback_effective_score_adjustment = EXCLUDED.feedback_effective_score_adjustment,
			feedback_reasons = EXCLUDED.feedback_reasons,
			last_error = EXCLUDED.last_error,
			consecutive_failures = EXCLUDED.consecutive_failures,
			stall_count = EXCLUDED.stall_count,
			last_send_duration_ms = EXCLUDED.last_send_duration_ms,
			quality_window_sample_count = EXCLUDED.quality_window_sample_count,
			quality_window_failure_count = EXCLUDED.quality_window_failure_count,
			quality_window_drop_count = EXCLUDED.quality_window_drop_count,
			quality_window_slow_count = EXCLUDED.quality_window_slow_count,
			old_hops = EXCLUDED.old_hops,
			replacement_hops = EXCLUDED.replacement_hops,
			payload = EXCLUDED.payload,
			updated_at = NOW()
		RETURNING id::text, cluster_id::text, reporter_node_id::text, service_class, route_id,
		          replacement_route_id, rebuild_request_id, rebuild_status, rebuild_reason,
		          rebuild_attempt, decision_source, outcome, generation, policy_fingerprint,
		          observed_policy_fingerprint, observed_route_generation, effective_route_generation,
		          feedback_status, feedback_score_adjustment, feedback_effective_score_adjustment,
		          feedback_reasons, last_error, consecutive_failures, stall_count,
		          last_send_duration_ms, quality_window_sample_count, quality_window_failure_count,
		          quality_window_drop_count, quality_window_slow_count, old_hops, replacement_hops,
		          node_transition_status, node_transition_generation, node_transition_observed_at,
		          node_transition_matched, node_route_generation_status, node_route_generation_applied_at,
		          node_route_generation_withdrawn_at, node_route_generation_matched,
		          post_rebuild_selected_route_id, post_rebuild_send_packets, post_rebuild_send_failures,
		          post_rebuild_send_flow_packets, post_rebuild_send_flow_dropped,
		          guard_status, guard_severity, guard_reason, guard_transition_deadline_seconds,
		          guard_traffic_deadline_seconds, correlation_timeline, correlation_snapshot_at,
		          payload, created_at, updated_at
	`, id, input.ClusterID, input.ReporterNodeID, input.ServiceClass, input.RouteID, input.ReplacementRouteID,
		input.RebuildRequestID, input.RebuildStatus, input.RebuildReason, input.RebuildAttempt, input.DecisionSource,
		input.Outcome, input.Generation, input.PolicyFingerprint, input.ObservedPolicyFingerprint,
		input.ObservedRouteGeneration, input.EffectiveRouteGeneration, input.FeedbackStatus,
		input.FeedbackScoreAdjustment, input.FeedbackEffectiveScoreAdjustment, input.FeedbackReasons,
		input.LastError, input.ConsecutiveFailures, input.StallCount, input.LastSendDurationMs,
		input.QualityWindowSampleCount, input.QualityWindowFailureCount, input.QualityWindowDropCount,
		input.QualityWindowSlowCount, input.OldHops, input.ReplacementHops, []byte(payload))
	return scanFabricServiceChannelRouteRebuildAttempt(row)
}

func (s *PostgresStore) ListFabricServiceChannelRouteRebuildAttempts(ctx context.Context, input ListFabricServiceChannelRouteRebuildAttemptsInput) ([]FabricServiceChannelRouteRebuildAttempt, error) {
	limit := input.Limit
	if limit <= 0 || limit > 200 {
		limit = 100
	}
	offset := input.Offset
	if offset < 0 {
		offset = 0
	}
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, reporter_node_id::text, service_class, route_id,
		       replacement_route_id, rebuild_request_id, rebuild_status, rebuild_reason,
		       rebuild_attempt, decision_source, outcome, generation, policy_fingerprint,
		       observed_policy_fingerprint, observed_route_generation, effective_route_generation,
		       feedback_status, feedback_score_adjustment, feedback_effective_score_adjustment,
		       feedback_reasons, last_error, consecutive_failures, stall_count,
		       last_send_duration_ms, quality_window_sample_count, quality_window_failure_count,
		       quality_window_drop_count, quality_window_slow_count, old_hops, replacement_hops,
		       node_transition_status, node_transition_generation, node_transition_observed_at,
		       node_transition_matched, node_route_generation_status, node_route_generation_applied_at,
		       node_route_generation_withdrawn_at, node_route_generation_matched,
		       post_rebuild_selected_route_id, post_rebuild_send_packets, post_rebuild_send_failures,
		       post_rebuild_send_flow_packets, post_rebuild_send_flow_dropped,
		       guard_status, guard_severity, guard_reason, guard_transition_deadline_seconds,
		       guard_traffic_deadline_seconds, correlation_timeline, correlation_snapshot_at,
		       payload, created_at, updated_at
		FROM fabric_service_channel_route_rebuild_attempts
		WHERE cluster_id = $1::uuid
		  AND (NULLIF($2, '') IS NULL OR reporter_node_id = NULLIF($2, '')::uuid)
		  AND ($3 = '' OR route_id = $3)
		  AND ($4 = '' OR replacement_route_id = $4)
		  AND ($5 = '' OR service_class = $5)
		  AND ($6 = '' OR rebuild_status = $6)
		  AND ($7 = '' OR rebuild_request_id = $7)
		  AND ($8 = '' OR generation = $8)
		  AND ($9 = '' OR payload->>'feedback_source' = $9)
		  AND ($10 = '' OR payload->>'feedback_channel_id' = $10)
		  AND ($11 = '' OR payload->>'feedback_violation_status' = $11)
		ORDER BY updated_at DESC
		LIMIT $12 OFFSET $13
	`, input.ClusterID, input.ReporterNodeID, input.RouteID, input.ReplacementRouteID, input.ServiceClass, input.RebuildStatus, input.RebuildRequestID, input.Generation, input.FeedbackSource, input.FeedbackChannelID, input.FeedbackViolationStatus, limit, offset)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	out := []FabricServiceChannelRouteRebuildAttempt{}
	for rows.Next() {
		item, err := scanFabricServiceChannelRouteRebuildAttempt(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) UpdateFabricServiceChannelRouteRebuildCorrelationSnapshot(ctx context.Context, input UpdateFabricServiceChannelRouteRebuildCorrelationSnapshotInput) error {
	timeline := mustJSONRaw(input.Timeline)
	_, err := s.db.Exec(ctx, `
		UPDATE fabric_service_channel_route_rebuild_attempts
		SET node_transition_status = $2,
		    node_transition_generation = $3,
		    node_transition_observed_at = $4,
		    node_transition_matched = $5,
		    node_route_generation_status = $6,
		    node_route_generation_applied_at = $7,
		    node_route_generation_withdrawn_at = $8,
		    node_route_generation_matched = $9,
		    post_rebuild_selected_route_id = $10,
		    post_rebuild_send_packets = $11,
		    post_rebuild_send_failures = $12,
		    post_rebuild_send_flow_packets = $13,
		    post_rebuild_send_flow_dropped = $14,
		    guard_status = $15,
		    guard_severity = $16,
		    guard_reason = $17,
		    guard_transition_deadline_seconds = $18,
		    guard_traffic_deadline_seconds = $19,
		    correlation_timeline = $20::jsonb,
		    correlation_snapshot_at = $21
		WHERE id = $1::uuid
	`, input.ID, input.NodeTransitionStatus, input.NodeTransitionGeneration, input.NodeTransitionObservedAt,
		input.NodeTransitionMatched, input.NodeRouteGenerationStatus, input.NodeRouteGenerationAppliedAt,
		input.NodeRouteGenerationWithdrawnAt, input.NodeRouteGenerationMatched, input.PostRebuildSelectedRouteID,
		int64(input.PostRebuildSendPackets), int64(input.PostRebuildSendFailures), int64(input.PostRebuildSendFlowPackets),
		int64(input.PostRebuildSendFlowDropped), input.GuardStatus, input.GuardSeverity, input.GuardReason,
		input.GuardTransitionDeadlineSeconds, input.GuardTrafficDeadlineSeconds, []byte(timeline), input.CorrelationSnapshotAt)
	return err
}

func (s *PostgresStore) GetFabricServiceChannelSchemaStatus(ctx context.Context, input GetFabricServiceChannelSchemaStatusInput) (FabricServiceChannelSchemaStatus, error) {
	checks := fabricServiceChannelRequiredSchemaChecks()
	status := FabricServiceChannelSchemaStatus{
		ClusterID:         input.ClusterID,
		ObservedAt:        time.Now().UTC(),
		Status:            "ready",
		Reason:            "schema_ready",
		RequiredMigration: "000028_fabric_service_channel_rebuild_correlation_snapshot",
		RequiredChecks:    make([]FabricServiceChannelSchemaCheck, 0, len(checks)),
	}
	for _, check := range checks {
		exists, err := s.fabricServiceChannelSchemaCheckExists(ctx, check)
		if err != nil {
			return FabricServiceChannelSchemaStatus{}, err
		}
		check.Status = "present"
		if !exists {
			check.Status = "missing"
			status.MissingChecks = append(status.MissingChecks, check)
		}
		status.RequiredChecks = append(status.RequiredChecks, check)
	}
	status.RequiredCheckCount = len(status.RequiredChecks)
	status.MissingCheckCount = len(status.MissingChecks)
	status.PassedCheckCount = status.RequiredCheckCount - status.MissingCheckCount
	if status.MissingCheckCount > 0 {
		status.Status = "blocked"
		status.Reason = "schema_migration_required"
		status.RecommendedOperatorAction = "Apply backend migration 000028 before swapping or using this backend build."
	}
	return status, nil
}

func (s *PostgresStore) fabricServiceChannelSchemaCheckExists(ctx context.Context, check FabricServiceChannelSchemaCheck) (bool, error) {
	if check.ColumnName == "" {
		var exists bool
		err := s.db.QueryRow(ctx, `
			SELECT EXISTS (
				SELECT 1
				FROM information_schema.tables
				WHERE table_schema = 'public'
				  AND table_name = $1
			)
		`, check.RelationName).Scan(&exists)
		return exists, err
	}
	var exists bool
	err := s.db.QueryRow(ctx, `
		SELECT EXISTS (
			SELECT 1
			FROM information_schema.columns
			WHERE table_schema = 'public'
			  AND table_name = $1
			  AND column_name = $2
		)
	`, check.RelationName, check.ColumnName).Scan(&exists)
	return exists, err
}

func fabricServiceChannelRequiredSchemaChecks() []FabricServiceChannelSchemaCheck {
	const migration = "000028_fabric_service_channel_rebuild_correlation_snapshot"
	const table = "fabric_service_channel_route_rebuild_attempts"
	columns := []string{
		"node_transition_status",
		"node_transition_generation",
		"node_transition_observed_at",
		"node_transition_matched",
		"node_route_generation_status",
		"node_route_generation_applied_at",
		"node_route_generation_withdrawn_at",
		"node_route_generation_matched",
		"post_rebuild_selected_route_id",
		"post_rebuild_send_packets",
		"post_rebuild_send_failures",
		"post_rebuild_send_flow_packets",
		"post_rebuild_send_flow_dropped",
		"guard_status",
		"guard_severity",
		"guard_reason",
		"guard_transition_deadline_seconds",
		"guard_traffic_deadline_seconds",
		"correlation_timeline",
		"correlation_snapshot_at",
	}
	checks := []FabricServiceChannelSchemaCheck{{
		CheckID:      table,
		RelationName: table,
		RequiredBy:   migration,
	}}
	for _, column := range columns {
		checks = append(checks, FabricServiceChannelSchemaCheck{
			CheckID:      table + "." + column,
			RelationName: table,
			ColumnName:   column,
			RequiredBy:   migration,
		})
	}
	return checks
}

func (s *PostgresStore) UpsertFabricServiceChannelRouteRebuildAlertSilence(ctx context.Context, input SilenceFabricServiceChannelRouteRebuildAlertInput, expiresAt time.Time) (FabricServiceChannelRouteRebuildAlertSilence, error) {
	payload := mustJSONRaw(map[string]any{
		"schema_version":  "rap.fabric_service_channel_rebuild_alert_silence.v1",
		"reason":          input.Reason,
		"incident_source": input.IncidentSource,
		"channel_id":      input.ChannelID,
	})
	row := s.db.QueryRow(ctx, `
		INSERT INTO fabric_service_channel_rebuild_alert_silences (
			cluster_id, reporter_node_id, route_id, guard_status, generation,
			reason, created_by_user_id, expires_at, payload
		)
		VALUES ($1::uuid, $2::uuid, $3, $4, $5, $6, NULLIF($7, '')::uuid, $8, $9::jsonb)
		ON CONFLICT (cluster_id, reporter_node_id, route_id, guard_status, generation)
		DO UPDATE SET reason = EXCLUDED.reason,
		              created_by_user_id = EXCLUDED.created_by_user_id,
		              created_at = NOW(),
		              expires_at = EXCLUDED.expires_at,
		              payload = EXCLUDED.payload
		RETURNING id::text, cluster_id::text, reporter_node_id::text, route_id,
		          guard_status, generation, reason, created_by_user_id::text,
		          created_at, expires_at, payload
	`, input.ClusterID, input.ReporterNodeID, input.RouteID, input.GuardStatus, input.Generation, input.Reason, input.ActorUserID, expiresAt, []byte(payload))
	return scanFabricServiceChannelRouteRebuildAlertSilence(row)
}

func (s *PostgresStore) ListFabricServiceChannelRouteRebuildAlertSilences(ctx context.Context, clusterID string, now time.Time) ([]FabricServiceChannelRouteRebuildAlertSilence, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, reporter_node_id::text, route_id,
		       guard_status, generation, reason, created_by_user_id::text,
		       created_at, expires_at, payload
		FROM fabric_service_channel_rebuild_alert_silences
		WHERE cluster_id = $1::uuid
		  AND expires_at > $2
		ORDER BY created_at DESC
	`, clusterID, now.UTC())
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	out := []FabricServiceChannelRouteRebuildAlertSilence{}
	for rows.Next() {
		item, err := scanFabricServiceChannelRouteRebuildAlertSilence(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) DeleteFabricServiceChannelRouteRebuildAlertSilence(ctx context.Context, input UnsilenceFabricServiceChannelRouteRebuildAlertInput) (FabricServiceChannelRouteRebuildAlertSilence, error) {
	row := s.db.QueryRow(ctx, `
		DELETE FROM fabric_service_channel_rebuild_alert_silences
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		RETURNING id::text, cluster_id::text, reporter_node_id::text, route_id,
		          guard_status, generation, reason, created_by_user_id::text,
		          created_at, expires_at, payload
	`, input.ClusterID, input.SilenceID)
	return scanFabricServiceChannelRouteRebuildAlertSilence(row)
}

func (s *PostgresStore) ExpireFabricServiceChannelRouteFeedback(ctx context.Context, input ExpireFabricServiceChannelRouteFeedbackInput) (ExpireFabricServiceChannelRouteFeedbackResult, error) {
	now := input.Now.UTC()
	if now.IsZero() {
		now = time.Now().UTC()
	}
	cooldownUntil := now.Add(fabricServiceChannelOperatorExpireCooldown)
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return ExpireFabricServiceChannelRouteFeedbackResult{}, err
	}
	defer tx.Rollback(ctx)

	expiredAtText := now.Format(time.RFC3339Nano)
	cooldownUntilText := cooldownUntil.Format(time.RFC3339Nano)
	rows, err := tx.Query(ctx, `
		UPDATE fabric_service_channel_route_feedback_latest
		SET expires_at = $6,
		    payload = jsonb_set(
		        jsonb_set(
		            jsonb_set(
		                jsonb_set(payload, '{operator_expired}', 'true'::jsonb, true),
		                '{operator_expire_reason}', to_jsonb($5::text), true
		            ),
		            '{operator_expired_at}', to_jsonb($8::text), true
		        ),
		        '{operator_retry_cooldown_until}', to_jsonb($7::text), true
		    )
		WHERE cluster_id = $1::uuid
		  AND route_id = $2
		  AND (NULLIF($3, '') IS NULL OR reporter_node_id = NULLIF($3, '')::uuid)
		  AND ($4 = '' OR service_class = $4)
		  AND expires_at > $6
		RETURNING observation_id::text
	`, input.ClusterID, input.RouteID, input.ReporterNodeID, input.ServiceClass, input.Reason, now, cooldownUntilText, expiredAtText)
	if err != nil {
		return ExpireFabricServiceChannelRouteFeedbackResult{}, err
	}
	var observationIDs []string
	for rows.Next() {
		var id string
		if err := rows.Scan(&id); err != nil {
			rows.Close()
			return ExpireFabricServiceChannelRouteFeedbackResult{}, err
		}
		observationIDs = append(observationIDs, id)
	}
	if err := rows.Err(); err != nil {
		rows.Close()
		return ExpireFabricServiceChannelRouteFeedbackResult{}, err
	}
	rows.Close()
	if len(observationIDs) > 0 {
		for _, observationID := range observationIDs {
			if _, err := tx.Exec(ctx, `
				UPDATE fabric_service_channel_route_feedback_observations
				SET expires_at = $2,
				    payload = jsonb_set(
				        jsonb_set(
				            jsonb_set(
				                jsonb_set(payload, '{operator_expired}', 'true'::jsonb, true),
				                '{operator_expire_reason}', to_jsonb($3::text), true
				            ),
				            '{operator_expired_at}', to_jsonb($5::text), true
				        ),
				        '{operator_retry_cooldown_until}', to_jsonb($4::text), true
				    )
				WHERE id = $1::uuid
			`, observationID, now, input.Reason, cooldownUntilText, expiredAtText); err != nil {
				return ExpireFabricServiceChannelRouteFeedbackResult{}, err
			}
		}
	}
	if err := tx.Commit(ctx); err != nil {
		return ExpireFabricServiceChannelRouteFeedbackResult{}, err
	}
	return ExpireFabricServiceChannelRouteFeedbackResult{
		ClusterID:      input.ClusterID,
		ReporterNodeID: input.ReporterNodeID,
		RouteID:        input.RouteID,
		ServiceClass:   input.ServiceClass,
		ExpiredCount:   len(observationIDs),
		ExpiredAt:      now,
		CooldownUntil:  cooldownUntil,
	}, nil
}

func (s *PostgresStore) ListQoSPolicies(ctx context.Context, clusterID string) ([]MeshQoSPolicy, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, service_class, priority, reliability_mode,
		       drop_policy, bandwidth_policy, metadata, created_at, updated_at
		FROM mesh_qos_policies
		WHERE cluster_id = $1::uuid
		ORDER BY priority ASC
	`, clusterID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []MeshQoSPolicy
	for rows.Next() {
		item, err := scanQoSPolicy(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) ListFabricEntryPoints(ctx context.Context, clusterID string) ([]FabricEntryPoint, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, name, status, endpoint_type, public_endpoint,
		       policy, metadata, created_by_user_id::text, created_at, updated_at
		FROM fabric_entry_points
		WHERE cluster_id = $1::uuid
		ORDER BY name
	`, clusterID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []FabricEntryPoint
	for rows.Next() {
		item, err := scanFabricEntryPoint(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	if out == nil {
		out = []FabricEntryPoint{}
	}
	return out, rows.Err()
}

func (s *PostgresStore) CreateFabricEntryPoint(ctx context.Context, input CreateFabricEntryPointInput) (FabricEntryPoint, error) {
	id := uuid.NewString()
	row := s.db.QueryRow(ctx, `
		INSERT INTO fabric_entry_points (
			id, cluster_id, name, status, endpoint_type, public_endpoint,
			policy, metadata, created_by_user_id, created_at, updated_at
		) VALUES ($1::uuid, $2::uuid, $3, $4, $5, $6, $7::jsonb, $8::jsonb, $9::uuid, NOW(), NOW())
		RETURNING id::text, cluster_id::text, name, status, endpoint_type, public_endpoint,
		          policy, metadata, created_by_user_id::text, created_at, updated_at
	`, id, input.ClusterID, input.Name, input.Status, input.EndpointType, input.PublicEndpoint, []byte(input.Policy), []byte(input.Metadata), input.ActorUserID)
	return scanFabricEntryPoint(row)
}

func (s *PostgresStore) SetFabricEntryPointNode(ctx context.Context, input SetFabricEntryPointNodeInput) (FabricEntryPointNode, error) {
	row := s.db.QueryRow(ctx, `
		WITH endpoint_ok AS (
			SELECT id
			FROM fabric_entry_points
			WHERE id = $2::uuid
			  AND cluster_id = $1::uuid
		), membership_ok AS (
			SELECT node_id
			FROM cluster_memberships
			WHERE cluster_id = $1::uuid
			  AND node_id = $3::uuid
			  AND membership_status = 'active'
		)
		INSERT INTO fabric_entry_point_nodes (
			entry_point_id, cluster_id, node_id, status, priority, metadata, added_by_user_id, added_at
		)
		SELECT endpoint_ok.id, $1::uuid, membership_ok.node_id, $4, $5, $6::jsonb, $7::uuid, NOW()
		FROM endpoint_ok
		CROSS JOIN membership_ok
		ON CONFLICT (entry_point_id, node_id) DO UPDATE SET
			status = EXCLUDED.status,
			priority = EXCLUDED.priority,
			metadata = EXCLUDED.metadata
		RETURNING entry_point_id::text, cluster_id::text, node_id::text, status, priority,
		          metadata, added_by_user_id::text, added_at
	`, input.ClusterID, input.EntryPointID, input.NodeID, input.Status, input.Priority, []byte(input.Metadata), input.ActorUserID)
	return scanFabricEntryPointNode(row)
}

func (s *PostgresStore) ListFabricEntryPointNodes(ctx context.Context, clusterID, entryPointID string) ([]FabricEntryPointNode, error) {
	rows, err := s.db.Query(ctx, `
		SELECT entry_point_id::text, cluster_id::text, node_id::text, status, priority,
		       metadata, added_by_user_id::text, added_at
		FROM fabric_entry_point_nodes
		WHERE cluster_id = $1::uuid
		  AND entry_point_id = $2::uuid
		ORDER BY priority, added_at
	`, clusterID, entryPointID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []FabricEntryPointNode
	for rows.Next() {
		item, err := scanFabricEntryPointNode(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	if out == nil {
		out = []FabricEntryPointNode{}
	}
	return out, rows.Err()
}

func (s *PostgresStore) ListFabricEgressPools(ctx context.Context, clusterID string) ([]FabricEgressPool, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, name, status, description, route_scope,
		       policy, metadata, created_by_user_id::text, created_at, updated_at
		FROM fabric_egress_pools
		WHERE cluster_id = $1::uuid
		ORDER BY name
	`, clusterID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []FabricEgressPool
	for rows.Next() {
		item, err := scanFabricEgressPool(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	if out == nil {
		out = []FabricEgressPool{}
	}
	return out, rows.Err()
}

func (s *PostgresStore) CreateFabricEgressPool(ctx context.Context, input CreateFabricEgressPoolInput) (FabricEgressPool, error) {
	id := uuid.NewString()
	row := s.db.QueryRow(ctx, `
		INSERT INTO fabric_egress_pools (
			id, cluster_id, name, status, description, route_scope,
			policy, metadata, created_by_user_id, created_at, updated_at
		) VALUES ($1::uuid, $2::uuid, $3, $4, $5, $6::jsonb, $7::jsonb, $8::jsonb, $9::uuid, NOW(), NOW())
		RETURNING id::text, cluster_id::text, name, status, description, route_scope,
		          policy, metadata, created_by_user_id::text, created_at, updated_at
	`, id, input.ClusterID, input.Name, input.Status, input.Description, []byte(input.RouteScope), []byte(input.Policy), []byte(input.Metadata), input.ActorUserID)
	return scanFabricEgressPool(row)
}

func (s *PostgresStore) SetFabricEgressPoolNode(ctx context.Context, input SetFabricEgressPoolNodeInput) (FabricEgressPoolNode, error) {
	row := s.db.QueryRow(ctx, `
		WITH pool_ok AS (
			SELECT id
			FROM fabric_egress_pools
			WHERE id = $2::uuid
			  AND cluster_id = $1::uuid
		), membership_ok AS (
			SELECT node_id
			FROM cluster_memberships
			WHERE cluster_id = $1::uuid
			  AND node_id = $3::uuid
			  AND membership_status = 'active'
		)
		INSERT INTO fabric_egress_pool_nodes (
			egress_pool_id, cluster_id, node_id, status, priority, metadata, added_by_user_id, added_at
		)
		SELECT pool_ok.id, $1::uuid, membership_ok.node_id, $4, $5, $6::jsonb, $7::uuid, NOW()
		FROM pool_ok
		CROSS JOIN membership_ok
		ON CONFLICT (egress_pool_id, node_id) DO UPDATE SET
			status = EXCLUDED.status,
			priority = EXCLUDED.priority,
			metadata = EXCLUDED.metadata
		RETURNING egress_pool_id::text, cluster_id::text, node_id::text, status, priority,
		          metadata, added_by_user_id::text, added_at
	`, input.ClusterID, input.EgressPoolID, input.NodeID, input.Status, input.Priority, []byte(input.Metadata), input.ActorUserID)
	return scanFabricEgressPoolNode(row)
}

func (s *PostgresStore) ListFabricEgressPoolNodes(ctx context.Context, clusterID, egressPoolID string) ([]FabricEgressPoolNode, error) {
	rows, err := s.db.Query(ctx, `
		SELECT egress_pool_id::text, cluster_id::text, node_id::text, status, priority,
		       metadata, added_by_user_id::text, added_at
		FROM fabric_egress_pool_nodes
		WHERE cluster_id = $1::uuid
		  AND egress_pool_id = $2::uuid
		ORDER BY priority, added_at
	`, clusterID, egressPoolID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []FabricEgressPoolNode
	for rows.Next() {
		item, err := scanFabricEgressPoolNode(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	if out == nil {
		out = []FabricEgressPoolNode{}
	}
	return out, rows.Err()
}

func (s *PostgresStore) GetClusterAuthorityState(ctx context.Context, clusterID string) (ClusterAuthorityState, error) {
	row := s.db.QueryRow(ctx, `
		SELECT cluster_id::text, authority_state, mutation_mode, term, notes, updated_by_user_id::text, updated_at
		FROM cluster_authority_states
		WHERE cluster_id = $1::uuid
	`, clusterID)
	return scanAuthorityState(row)
}

func (s *PostgresStore) UpdateClusterAuthorityState(ctx context.Context, input UpdateClusterAuthorityInput) (ClusterAuthorityState, error) {
	row := s.db.QueryRow(ctx, `
		INSERT INTO cluster_authority_states (
			cluster_id, authority_state, mutation_mode, term, notes, updated_by_user_id, updated_at
		) VALUES ($1::uuid, $2, $3, 1, $4, $5::uuid, NOW())
		ON CONFLICT (cluster_id) DO UPDATE SET
			authority_state = EXCLUDED.authority_state,
			mutation_mode = EXCLUDED.mutation_mode,
			term = cluster_authority_states.term + 1,
			notes = EXCLUDED.notes,
			updated_by_user_id = EXCLUDED.updated_by_user_id,
			updated_at = EXCLUDED.updated_at
		RETURNING cluster_id::text, authority_state, mutation_mode, term, notes, updated_by_user_id::text, updated_at
	`, input.ClusterID, input.AuthorityState, input.MutationMode, input.Notes, input.ActorUserID)
	return scanAuthorityState(row)
}

func (s *PostgresStore) ListClusterAdminSummaries(ctx context.Context) ([]ClusterAdminSummary, error) {
	rows, err := s.db.Query(ctx, `
		SELECT cluster_id::text, slug, name, status, region, authority_state, mutation_mode,
		       cluster_key_algorithm, cluster_key_fingerprint,
		       node_count, healthy_node_count, pending_join_count, active_role_assignment_count, last_node_seen_at
		FROM cluster_admin_summaries
		ORDER BY name
	`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []ClusterAdminSummary
	for rows.Next() {
		var item ClusterAdminSummary
		if err := rows.Scan(
			&item.ClusterID,
			&item.Slug,
			&item.Name,
			&item.Status,
			&item.Region,
			&item.AuthorityState,
			&item.MutationMode,
			&item.ClusterKeyAlgorithm,
			&item.ClusterKeyFingerprint,
			&item.NodeCount,
			&item.HealthyNodeCount,
			&item.PendingJoinCount,
			&item.ActiveRoleAssignmentCount,
			&item.LastNodeSeenAt,
		); err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) CreateVPNConnection(ctx context.Context, input CreateVPNConnectionInput) (VPNConnection, error) {
	id := uuid.NewString()
	status := VPNConnectionStatusDisabled
	if input.DesiredState == VPNConnectionDesiredEnabled {
		status = VPNConnectionStatusEnabled
	}
	row := s.db.QueryRow(ctx, `
		INSERT INTO vpn_connections (
			id, cluster_id, organization_id, name, target_endpoint, protocol_family,
			credential_ref, mode, desired_state, allowed_node_policy, routing_usage,
			route_policy, qos_policy, placement_policy, status, metadata,
			created_by_user_id, updated_by_user_id, created_at, updated_at
		) VALUES (
			$1::uuid, $2::uuid, $3::uuid, $4, $5::jsonb, $6,
			$7, $8, $9, $10::jsonb, $11::jsonb,
			$12::jsonb, $13::jsonb, $14::jsonb, $15, $16::jsonb,
			$17::uuid, $17::uuid, NOW(), NOW()
		)
		RETURNING id::text, cluster_id::text, organization_id::text, name, target_endpoint,
		          protocol_family, credential_ref, mode, desired_state, allowed_node_policy,
		          routing_usage, route_policy, qos_policy, placement_policy, status, metadata,
		          created_by_user_id::text, updated_by_user_id::text, created_at, updated_at
	`, id, input.ClusterID, input.OrganizationID, input.Name, []byte(input.TargetEndpoint), input.ProtocolFamily,
		input.CredentialRef, input.Mode, input.DesiredState, []byte(input.AllowedNodePolicy), []byte(input.RoutingUsage),
		[]byte(input.RoutePolicy), []byte(input.QoSPolicy), []byte(input.PlacementPolicy), status, []byte(input.Metadata),
		input.ActorUserID)
	return scanVPNConnection(row)
}

func (s *PostgresStore) ListVPNConnections(ctx context.Context, clusterID string) ([]VPNConnection, error) {
	rows, err := s.db.Query(ctx, `
		SELECT vpn_connections.id::text, vpn_connections.cluster_id::text, organization_id::text, name, target_endpoint,
		       protocol_family, credential_ref, mode, desired_state, allowed_node_policy,
		       routing_usage, route_policy, qos_policy, placement_policy, vpn_connections.status,
		       vpn_connections.metadata || CASE WHEN l.id IS NULL THEN '{}'::jsonb ELSE jsonb_build_object(
		           'client_config',
		           COALESCE(vpn_connections.metadata->'client_config', '{}'::jsonb) ||
		           jsonb_build_object('vpn_address', '10.77.0.2/24') ||
		           CASE
		               WHEN COALESCE((vpn_connections.route_policy->>'full_tunnel')::boolean, false)
		               THEN jsonb_build_object('routes', jsonb_build_array('0.0.0.0/0'))
		               ELSE '{}'::jsonb
		           END ||
		           CASE
		               WHEN jsonb_typeof(gateway_status.status_payload->'exit_dns_servers') = 'array'
		                AND jsonb_array_length(gateway_status.status_payload->'exit_dns_servers') > 0
		               THEN jsonb_build_object('dns_servers', gateway_status.status_payload->'exit_dns_servers')
		               WHEN jsonb_typeof(vpn_connections.route_policy->'dns_servers') = 'array'
		                AND jsonb_array_length(vpn_connections.route_policy->'dns_servers') > 0
		               THEN jsonb_build_object('dns_servers', vpn_connections.route_policy->'dns_servers')
		               WHEN jsonb_typeof(vpn_connections.target_endpoint->'dns_servers') = 'array'
		                AND jsonb_array_length(vpn_connections.target_endpoint->'dns_servers') > 0
		               THEN jsonb_build_object('dns_servers', vpn_connections.target_endpoint->'dns_servers')
		               ELSE '{}'::jsonb
		           END ||
		           jsonb_strip_nulls(jsonb_build_object(
		               'runtime_status', CASE
		                   WHEN COALESCE((gateway_status.status_payload->>'packet_forwarding')::boolean, false) THEN 'packet_forwarding_active'
		                   WHEN COALESCE((gateway_status.status_payload->>'runtime_available')::boolean, false) THEN 'runtime_available'
		                   WHEN gateway_status.observed_status IS NOT NULL THEN gateway_status.observed_status
		                   ELSE 'lease_active'
		               END,
		               'gateway_node_id', l.owner_node_id::text,
		               'gateway_assignment_status', gateway_status.observed_status,
		               'gateway_interface', gateway_status.status_payload->>'gateway_interface',
		               'gateway_vpn_cidr', gateway_status.status_payload->>'gateway_vpn_cidr',
		               'relay_transport', gateway_status.status_payload->>'relay_transport',
		               'packet_forwarding', COALESCE((gateway_status.status_payload->>'packet_forwarding')::boolean, false),
		               'runtime_available', COALESCE((gateway_status.status_payload->>'runtime_available')::boolean, false),
		               'runtime_observed_at', gateway_status.observed_at
		           ))
		       ) END AS metadata,
		       created_by_user_id::text, updated_by_user_id::text, vpn_connections.created_at, vpn_connections.updated_at
		FROM vpn_connections
		LEFT JOIN vpn_connection_leases l
		       ON l.cluster_id = vpn_connections.cluster_id
		      AND l.vpn_connection_id = vpn_connections.id
		      AND l.status = 'active'
		      AND l.expires_at > NOW()
		LEFT JOIN vpn_connection_assignment_latest_statuses gateway_status
		       ON gateway_status.cluster_id = vpn_connections.cluster_id
		      AND gateway_status.vpn_connection_id = vpn_connections.id
		      AND gateway_status.node_id = l.owner_node_id
		WHERE vpn_connections.cluster_id = $1::uuid
		ORDER BY vpn_connections.created_at DESC
	`, clusterID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	return scanVPNConnections(rows)
}

func (s *PostgresStore) GetVPNConnection(ctx context.Context, clusterID, vpnConnectionID string) (VPNConnection, error) {
	row := s.db.QueryRow(ctx, `
		SELECT vpn_connections.id::text, vpn_connections.cluster_id::text, organization_id::text, name, target_endpoint,
		       protocol_family, credential_ref, mode, desired_state, allowed_node_policy,
		       routing_usage, route_policy, qos_policy, placement_policy, vpn_connections.status,
		       vpn_connections.metadata || CASE WHEN l.id IS NULL THEN '{}'::jsonb ELSE jsonb_build_object(
		           'client_config',
		           COALESCE(vpn_connections.metadata->'client_config', '{}'::jsonb) ||
		           jsonb_build_object('vpn_address', '10.77.0.2/24') ||
		           CASE
		               WHEN COALESCE((vpn_connections.route_policy->>'full_tunnel')::boolean, false)
		               THEN jsonb_build_object('routes', jsonb_build_array('0.0.0.0/0'))
		               ELSE '{}'::jsonb
		           END ||
		           CASE
		               WHEN jsonb_typeof(gateway_status.status_payload->'exit_dns_servers') = 'array'
		                AND jsonb_array_length(gateway_status.status_payload->'exit_dns_servers') > 0
		               THEN jsonb_build_object('dns_servers', gateway_status.status_payload->'exit_dns_servers')
		               WHEN jsonb_typeof(vpn_connections.route_policy->'dns_servers') = 'array'
		                AND jsonb_array_length(vpn_connections.route_policy->'dns_servers') > 0
		               THEN jsonb_build_object('dns_servers', vpn_connections.route_policy->'dns_servers')
		               WHEN jsonb_typeof(vpn_connections.target_endpoint->'dns_servers') = 'array'
		                AND jsonb_array_length(vpn_connections.target_endpoint->'dns_servers') > 0
		               THEN jsonb_build_object('dns_servers', vpn_connections.target_endpoint->'dns_servers')
		               ELSE '{}'::jsonb
		           END ||
		           jsonb_strip_nulls(jsonb_build_object(
		               'runtime_status', CASE
		                   WHEN COALESCE((gateway_status.status_payload->>'packet_forwarding')::boolean, false) THEN 'packet_forwarding_active'
		                   WHEN COALESCE((gateway_status.status_payload->>'runtime_available')::boolean, false) THEN 'runtime_available'
		                   WHEN gateway_status.observed_status IS NOT NULL THEN gateway_status.observed_status
		                   ELSE 'lease_active'
		               END,
		               'gateway_node_id', l.owner_node_id::text,
		               'gateway_assignment_status', gateway_status.observed_status,
		               'gateway_interface', gateway_status.status_payload->>'gateway_interface',
		               'gateway_vpn_cidr', gateway_status.status_payload->>'gateway_vpn_cidr',
		               'relay_transport', gateway_status.status_payload->>'relay_transport',
		               'packet_forwarding', COALESCE((gateway_status.status_payload->>'packet_forwarding')::boolean, false),
		               'runtime_available', COALESCE((gateway_status.status_payload->>'runtime_available')::boolean, false),
		               'runtime_observed_at', gateway_status.observed_at
		           ))
		       ) END AS metadata,
		       created_by_user_id::text, updated_by_user_id::text, vpn_connections.created_at, vpn_connections.updated_at
		FROM vpn_connections
		LEFT JOIN vpn_connection_leases l
		       ON l.cluster_id = vpn_connections.cluster_id
		      AND l.vpn_connection_id = vpn_connections.id
		      AND l.status = 'active'
		      AND l.expires_at > NOW()
		LEFT JOIN vpn_connection_assignment_latest_statuses gateway_status
		       ON gateway_status.cluster_id = vpn_connections.cluster_id
		      AND gateway_status.vpn_connection_id = vpn_connections.id
		      AND gateway_status.node_id = l.owner_node_id
		WHERE vpn_connections.cluster_id = $1::uuid
		  AND vpn_connections.id = $2::uuid
	`, clusterID, vpnConnectionID)
	return scanVPNConnection(row)
}

func (s *PostgresStore) UpdateVPNConnectionDesiredState(ctx context.Context, input UpdateVPNConnectionDesiredStateInput) (VPNConnection, error) {
	status := VPNConnectionStatusDisabled
	if input.DesiredState == VPNConnectionDesiredEnabled {
		status = VPNConnectionStatusEnabled
	}
	row := s.db.QueryRow(ctx, `
		UPDATE vpn_connections
		SET desired_state = $3,
		    status = $4,
		    updated_by_user_id = $5::uuid,
		    updated_at = NOW()
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		RETURNING id::text, cluster_id::text, organization_id::text, name, target_endpoint,
		          protocol_family, credential_ref, mode, desired_state, allowed_node_policy,
		          routing_usage, route_policy, qos_policy, placement_policy, status, metadata,
		          created_by_user_id::text, updated_by_user_id::text, created_at, updated_at
	`, input.ClusterID, input.VPNConnectionID, input.DesiredState, status, input.ActorUserID)
	return scanVPNConnection(row)
}

func (s *PostgresStore) UpsertVPNConnectionRoutePolicy(ctx context.Context, input UpsertVPNConnectionRoutePolicyInput) (VPNConnectionRoutePolicy, error) {
	id := uuid.NewString()
	row := s.db.QueryRow(ctx, `
		INSERT INTO vpn_connection_route_policies (
			id, vpn_connection_id, cluster_id, organization_id, route_type, destination,
			action, service_type, priority, policy, status, created_by_user_id, created_at, updated_at
		)
		SELECT $1::uuid, vc.id, vc.cluster_id, vc.organization_id, $4, $5,
		       $6, $7, $8, $9::jsonb, $10, $11::uuid, NOW(), NOW()
		FROM vpn_connections vc
		WHERE vc.cluster_id = $2::uuid
		  AND vc.id = $3::uuid
		RETURNING id::text, vpn_connection_id::text, cluster_id::text, organization_id::text,
		          route_type, destination, action, service_type, priority, policy, status,
		          created_by_user_id::text, created_at, updated_at
	`, id, input.ClusterID, input.VPNConnectionID, input.RouteType, input.Destination, input.Action,
		input.ServiceType, input.Priority, []byte(input.Policy), input.Status, input.ActorUserID)
	return scanVPNRoutePolicy(row)
}

func (s *PostgresStore) ListVPNConnectionRoutePolicies(ctx context.Context, clusterID, vpnConnectionID string) ([]VPNConnectionRoutePolicy, error) {
	rows, err := s.db.Query(ctx, `
		SELECT id::text, vpn_connection_id::text, cluster_id::text, organization_id::text,
		       route_type, destination, action, service_type, priority, policy, status,
		       created_by_user_id::text, created_at, updated_at
		FROM vpn_connection_route_policies
		WHERE cluster_id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		ORDER BY priority ASC, created_at DESC
	`, clusterID, vpnConnectionID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	return scanVPNRoutePolicies(rows)
}

func (s *PostgresStore) SetVPNConnectionAllowedNodes(ctx context.Context, input SetVPNConnectionAllowedNodesInput) ([]VPNConnectionAllowedNode, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return nil, err
	}
	defer tx.Rollback(ctx)

	var exists string
	if err := tx.QueryRow(ctx, `
		SELECT id::text
		FROM vpn_connections
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		FOR UPDATE
	`, input.ClusterID, input.VPNConnectionID).Scan(&exists); err != nil {
		return nil, err
	}
	if _, err := tx.Exec(ctx, `
		DELETE FROM vpn_connection_allowed_nodes
		WHERE cluster_id = $1::uuid
		  AND vpn_connection_id = $2::uuid
	`, input.ClusterID, input.VPNConnectionID); err != nil {
		return nil, err
	}
	for _, nodeID := range input.NodeIDs {
		if _, err := tx.Exec(ctx, `
			INSERT INTO vpn_connection_allowed_nodes (
				vpn_connection_id, cluster_id, node_id, role_preference, status,
				metadata, created_by_user_id, created_at
			) VALUES ($1::uuid, $2::uuid, $3::uuid, $4, 'active', $5::jsonb, $6::uuid, NOW())
		`, input.VPNConnectionID, input.ClusterID, nodeID, input.RolePreference, []byte(input.Metadata), input.ActorUserID); err != nil {
			return nil, err
		}
	}
	items, err := listVPNConnectionAllowedNodes(ctx, tx, input.ClusterID, input.VPNConnectionID)
	if err != nil {
		return nil, err
	}
	if err := tx.Commit(ctx); err != nil {
		return nil, err
	}
	return items, nil
}

func (s *PostgresStore) ListVPNConnectionAllowedNodes(ctx context.Context, clusterID, vpnConnectionID string) ([]VPNConnectionAllowedNode, error) {
	return listVPNConnectionAllowedNodes(ctx, s.db, clusterID, vpnConnectionID)
}

func (s *PostgresStore) AcquireVPNConnectionLease(ctx context.Context, input AcquireVPNConnectionLeaseInput, expiresAt time.Time, fencingToken string) (VPNConnectionLease, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return VPNConnectionLease{}, err
	}
	defer tx.Rollback(ctx)

	if _, err := tx.Exec(ctx, `
		UPDATE vpn_connection_leases
		SET status = 'expired'
		WHERE vpn_connection_id = $1::uuid
		  AND cluster_id = $2::uuid
		  AND status = 'active'
		  AND expires_at <= NOW()
	`, input.VPNConnectionID, input.ClusterID); err != nil {
		return VPNConnectionLease{}, err
	}

	existingRow := tx.QueryRow(ctx, `
		SELECT id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		       lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		       released_at, fenced_at, metadata
		FROM vpn_connection_leases
		WHERE vpn_connection_id = $1::uuid
		  AND cluster_id = $2::uuid
		  AND status = 'active'
		  AND expires_at > NOW()
		FOR UPDATE
	`, input.VPNConnectionID, input.ClusterID)
	existing, err := scanVPNLease(existingRow)
	if err == nil {
		if existing.OwnerNodeID == input.OwnerNodeID {
			if err := tx.Commit(ctx); err != nil {
				return VPNConnectionLease{}, err
			}
			return existing, nil
		}
		return VPNConnectionLease{}, ErrVPNLeaseAlreadyActive
	}
	if !errors.Is(err, pgx.ErrNoRows) {
		return VPNConnectionLease{}, err
	}

	id := uuid.NewString()
	row := tx.QueryRow(ctx, `
		WITH next_generation AS (
			SELECT COALESCE(MAX(lease_generation), 0) + 1 AS value
			FROM vpn_connection_leases
			WHERE vpn_connection_id = $2::uuid
		)
		INSERT INTO vpn_connection_leases (
			id, vpn_connection_id, cluster_id, owner_node_id, lease_generation,
			fencing_token, status, acquired_at, renewed_at, expires_at, metadata
		)
		SELECT $1::uuid, vc.id, vc.cluster_id, $4::uuid, next_generation.value,
		       $5, 'active', NOW(), NOW(), $6, $7::jsonb
		FROM vpn_connections vc, next_generation
		WHERE vc.cluster_id = $3::uuid
		  AND vc.id = $2::uuid
		RETURNING id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		          lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		          released_at, fenced_at, metadata
	`, id, input.VPNConnectionID, input.ClusterID, input.OwnerNodeID, fencingToken, expiresAt, []byte(input.Metadata))
	item, err := scanVPNLease(row)
	if err != nil {
		if isUniqueViolation(err) {
			return VPNConnectionLease{}, ErrVPNLeaseAlreadyActive
		}
		return VPNConnectionLease{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return VPNConnectionLease{}, err
	}
	return item, nil
}

func (s *PostgresStore) RenewVPNConnectionLease(ctx context.Context, input RenewVPNConnectionLeaseInput, expiresAt time.Time) (VPNConnectionLease, error) {
	row := s.db.QueryRow(ctx, `
		UPDATE vpn_connection_leases
		SET renewed_at = NOW(),
		    expires_at = $6
		WHERE id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		  AND cluster_id = $3::uuid
		  AND owner_node_id = $4::uuid
		  AND fencing_token = $5
		  AND status = 'active'
		  AND expires_at > NOW()
		RETURNING id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		          lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		          released_at, fenced_at, metadata
	`, input.LeaseID, input.VPNConnectionID, input.ClusterID, input.OwnerNodeID, input.FencingToken, expiresAt)
	return scanVPNLease(row)
}

func (s *PostgresStore) RenewNodeVPNAssignmentLease(ctx context.Context, input RenewNodeVPNAssignmentLeaseInput, expiresAt time.Time) (VPNConnectionLease, error) {
	row := s.db.QueryRow(ctx, `
		UPDATE vpn_connection_leases
		SET renewed_at = NOW(),
		    expires_at = $5
		WHERE id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		  AND cluster_id = $3::uuid
		  AND owner_node_id = $4::uuid
		  AND status = 'active'
		  AND expires_at > NOW()
		RETURNING id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		          lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		          released_at, fenced_at, metadata
	`, input.LeaseID, input.VPNConnectionID, input.ClusterID, input.OwnerNodeID, expiresAt)
	return scanVPNLease(row)
}

func (s *PostgresStore) ReleaseVPNConnectionLease(ctx context.Context, input ReleaseVPNConnectionLeaseInput) (VPNConnectionLease, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return VPNConnectionLease{}, err
	}
	defer tx.Rollback(ctx)

	row := tx.QueryRow(ctx, `
		UPDATE vpn_connection_leases
		SET status = 'released',
		    released_at = NOW()
		WHERE id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		  AND cluster_id = $3::uuid
		  AND owner_node_id = $4::uuid
		  AND fencing_token = $5
		  AND status = 'active'
		RETURNING id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		          lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		          released_at, fenced_at, metadata
	`, input.LeaseID, input.VPNConnectionID, input.ClusterID, input.OwnerNodeID, input.FencingToken)
	item, err := scanVPNLease(row)
	if err == nil {
		if err := tx.Commit(ctx); err != nil {
			return VPNConnectionLease{}, err
		}
		return item, nil
	}
	if !errors.Is(err, pgx.ErrNoRows) {
		return VPNConnectionLease{}, err
	}
	row = tx.QueryRow(ctx, `
		SELECT id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		       lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		       released_at, fenced_at, metadata
		FROM vpn_connection_leases
		WHERE id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		  AND cluster_id = $3::uuid
		  AND owner_node_id = $4::uuid
		  AND fencing_token = $5
		  AND status = 'released'
	`, input.LeaseID, input.VPNConnectionID, input.ClusterID, input.OwnerNodeID, input.FencingToken)
	item, err = scanVPNLease(row)
	if err != nil {
		return VPNConnectionLease{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return VPNConnectionLease{}, err
	}
	return item, nil
}

func (s *PostgresStore) FenceVPNConnectionLease(ctx context.Context, input FenceVPNConnectionLeaseInput) (VPNConnectionLease, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return VPNConnectionLease{}, err
	}
	defer tx.Rollback(ctx)

	row := tx.QueryRow(ctx, `
		UPDATE vpn_connection_leases
		SET status = 'fenced',
		    fenced_at = NOW(),
		    metadata = metadata || $4::jsonb
		WHERE id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		  AND cluster_id = $3::uuid
		  AND status = 'active'
		RETURNING id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		          lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		          released_at, fenced_at, metadata
	`, input.LeaseID, input.VPNConnectionID, input.ClusterID, []byte(fmt.Sprintf(`{"fence_reason":%q}`, input.Reason)))
	item, err := scanVPNLease(row)
	if err == nil {
		if err := tx.Commit(ctx); err != nil {
			return VPNConnectionLease{}, err
		}
		return item, nil
	}
	if !errors.Is(err, pgx.ErrNoRows) {
		return VPNConnectionLease{}, err
	}
	row = tx.QueryRow(ctx, `
		SELECT id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		       lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		       released_at, fenced_at, metadata
		FROM vpn_connection_leases
		WHERE id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		  AND cluster_id = $3::uuid
		  AND status = 'fenced'
	`, input.LeaseID, input.VPNConnectionID, input.ClusterID)
	item, err = scanVPNLease(row)
	if err != nil {
		return VPNConnectionLease{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return VPNConnectionLease{}, err
	}
	return item, nil
}

func (s *PostgresStore) GetActiveVPNConnectionLease(ctx context.Context, clusterID, vpnConnectionID string) (VPNConnectionLease, error) {
	row := s.db.QueryRow(ctx, `
		SELECT id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		       lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		       released_at, fenced_at, metadata
		FROM vpn_connection_leases
		WHERE cluster_id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		  AND status = 'active'
		  AND expires_at > NOW()
	`, clusterID, vpnConnectionID)
	return scanVPNLease(row)
}

func (s *PostgresStore) CheckVPNLeaseOwnerEligibility(ctx context.Context, clusterID, vpnConnectionID, ownerNodeID string) (VPNLeaseOwnerEligibility, error) {
	row := s.db.QueryRow(ctx, `
		SELECT vc.id::text,
		       vc.cluster_id::text,
		       vc.organization_id::text,
		       $3::text AS owner_node_id,
		       COALESCE(cm.membership_status, '') AS membership_status,
		       COALESCE(n.registration_status, '') AS node_registration_status,
		       (
		           COALESCE(vc.allowed_node_policy->>'mode', 'explicit') = 'any_capable'
		           OR EXISTS (
		               SELECT 1
		               FROM vpn_connection_allowed_nodes van
		               WHERE van.vpn_connection_id = vc.id
		                 AND van.cluster_id = vc.cluster_id
		                 AND van.node_id = $3::uuid
		                 AND van.status = 'active'
		           )
		           OR (
		               COALESCE(vc.allowed_node_policy->>'mode', 'explicit') = 'explicit'
		               AND COALESCE(vc.allowed_node_policy->'node_ids', '[]'::jsonb) ? $3::text
		           )
		       ) AS allowed_by_policy,
		       EXISTS (
		           SELECT 1
		           FROM node_role_assignments nra
		           WHERE nra.cluster_id = vc.cluster_id
		             AND nra.node_id = $3::uuid
		             AND nra.status = 'active'
		             AND nra.role IN ('vpn-exit', 'vpn-connector', 'ipv4-egress')
		             AND (nra.organization_id IS NULL OR nra.organization_id = vc.organization_id)
		       ) AS has_authorized_role
		FROM vpn_connections vc
		LEFT JOIN cluster_memberships cm ON cm.cluster_id = vc.cluster_id AND cm.node_id = $3::uuid
		LEFT JOIN nodes n ON n.id = $3::uuid
		WHERE vc.cluster_id = $1::uuid
		  AND vc.id = $2::uuid
	`, clusterID, vpnConnectionID, ownerNodeID)
	var item VPNLeaseOwnerEligibility
	if err := row.Scan(
		&item.VPNConnectionID,
		&item.ClusterID,
		&item.OrganizationID,
		&item.OwnerNodeID,
		&item.MembershipStatus,
		&item.NodeRegistrationStatus,
		&item.AllowedByPolicy,
		&item.HasAuthorizedRole,
	); err != nil {
		return VPNLeaseOwnerEligibility{}, err
	}
	return item, nil
}

func (s *PostgresStore) ExpireStaleVPNConnectionLeases(ctx context.Context, clusterID string, now time.Time) ([]VPNConnectionLease, error) {
	rows, err := s.db.Query(ctx, `
		UPDATE vpn_connection_leases
		SET status = 'expired'
		WHERE cluster_id = $1::uuid
		  AND status = 'active'
		  AND expires_at <= $2
		RETURNING id::text, vpn_connection_id::text, cluster_id::text, owner_node_id::text,
		          lease_generation, fencing_token, status, acquired_at, renewed_at, expires_at,
		          released_at, fenced_at, metadata
	`, clusterID, now)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []VPNConnectionLease
	for rows.Next() {
		item, err := scanVPNLease(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) ListNodeVPNAssignments(ctx context.Context, clusterID, nodeID string) ([]NodeVPNAssignment, error) {
	rows, err := s.db.Query(ctx, `
		WITH active_node AS (
			SELECT 1
			FROM cluster_memberships cm
			JOIN nodes n ON n.id = cm.node_id
			WHERE cm.cluster_id = $1::uuid
			  AND cm.node_id = $2::uuid
			  AND cm.membership_status = 'active'
			  AND n.registration_status = 'active'
		),
		visible AS (
			SELECT vc.*,
			       (
			           COALESCE(vc.allowed_node_policy->>'mode', 'explicit') = 'any_capable'
			           OR EXISTS (
			               SELECT 1
			               FROM vpn_connection_allowed_nodes van
			               WHERE van.vpn_connection_id = vc.id
			                 AND van.cluster_id = vc.cluster_id
			                 AND van.node_id = $2::uuid
			                 AND van.status = 'active'
			           )
			           OR (
			               COALESCE(vc.allowed_node_policy->>'mode', 'explicit') = 'explicit'
			               AND COALESCE(vc.allowed_node_policy->'node_ids', '[]'::jsonb) ? $2::text
			           )
			       ) AS allowed_by_policy,
			       EXISTS (
			           SELECT 1
			           FROM node_role_assignments nra
			           WHERE nra.cluster_id = vc.cluster_id
			             AND nra.node_id = $2::uuid
			             AND nra.status = 'active'
			             AND nra.role IN ('vpn-exit', 'vpn-connector', 'ipv4-egress')
			             AND (nra.organization_id IS NULL OR nra.organization_id = vc.organization_id)
			       ) AS has_authorized_role,
			       EXISTS (
			           SELECT 1
			           FROM vpn_connection_leases active_owner
			           WHERE active_owner.cluster_id = vc.cluster_id
			             AND active_owner.vpn_connection_id = vc.id
			             AND active_owner.owner_node_id = $2::uuid
			             AND active_owner.status = 'active'
			             AND active_owner.expires_at > NOW()
			       ) AS is_active_owner
			FROM vpn_connections vc
			WHERE vc.cluster_id = $1::uuid
			  AND vc.desired_state = 'enabled'
		)
		SELECT v.id::text,
		       v.cluster_id::text,
		       v.organization_id::text,
		       v.name,
		       v.target_endpoint,
		       v.protocol_family,
		       v.mode,
		       v.desired_state,
		       v.routing_usage,
		       v.route_policy,
		       v.qos_policy,
		       v.placement_policy,
		       v.status,
		       (v.credential_ref IS NOT NULL) AS has_credential_ref,
		       CASE WHEN v.is_active_owner THEN 'active_owner' ELSE 'eligible_candidate' END AS assignment_reason,
		       CASE WHEN l.id IS NULL THEN NULL ELSE jsonb_build_object(
		           'lease_id', l.id::text,
		           'owner_node_id', l.owner_node_id::text,
		           'lease_generation', l.lease_generation,
		           'status', l.status,
		           'renewed_at', l.renewed_at,
		           'expires_at', l.expires_at
		       ) END AS active_lease,
		       v.updated_at
		FROM visible v
		JOIN active_node an ON TRUE
		LEFT JOIN vpn_connection_leases l
		       ON l.cluster_id = v.cluster_id
		      AND l.vpn_connection_id = v.id
		      AND l.status = 'active'
		      AND l.expires_at > NOW()
		WHERE (v.allowed_by_policy AND v.has_authorized_role)
		   OR v.is_active_owner
		ORDER BY v.name ASC, v.id ASC
	`, clusterID, nodeID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []NodeVPNAssignment
	for rows.Next() {
		item, err := scanNodeVPNAssignment(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func (s *PostgresStore) ReportNodeVPNAssignmentStatus(ctx context.Context, input ReportNodeVPNAssignmentStatusInput) (NodeVPNAssignmentStatus, error) {
	tx, err := s.db.Begin(ctx)
	if err != nil {
		return NodeVPNAssignmentStatus{}, err
	}
	defer func() { _ = tx.Rollback(ctx) }()

	id := uuid.NewString()
	row := tx.QueryRow(ctx, `
		INSERT INTO vpn_connection_assignment_status_reports (
			id, vpn_connection_id, cluster_id, node_id, observed_status, status_payload, observed_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4::uuid, $5, $6::jsonb, $7)
		RETURNING id::text, vpn_connection_id::text, cluster_id::text, node_id::text,
		          observed_status, status_payload, observed_at
	`, id, input.VPNConnectionID, input.ClusterID, input.NodeID, input.ObservedStatus, []byte(input.StatusPayload), input.ObservedAt)
	item, err := scanNodeVPNAssignmentStatus(row)
	if err != nil {
		return NodeVPNAssignmentStatus{}, err
	}

	if _, err := tx.Exec(ctx, `
		INSERT INTO vpn_connection_assignment_latest_statuses (
			vpn_connection_id, cluster_id, node_id, report_id, observed_status, status_payload, observed_at, updated_at
		) VALUES ($1::uuid, $2::uuid, $3::uuid, $4::uuid, $5, $6::jsonb, $7, NOW())
		ON CONFLICT (vpn_connection_id, node_id) DO UPDATE SET
			report_id = EXCLUDED.report_id,
			observed_status = EXCLUDED.observed_status,
			status_payload = EXCLUDED.status_payload,
			observed_at = EXCLUDED.observed_at,
			updated_at = NOW()
	`, input.VPNConnectionID, input.ClusterID, input.NodeID, item.ID, input.ObservedStatus, []byte(input.StatusPayload), input.ObservedAt); err != nil {
		return NodeVPNAssignmentStatus{}, err
	}
	if err := tx.Commit(ctx); err != nil {
		return NodeVPNAssignmentStatus{}, err
	}
	return item, nil
}

func (s *PostgresStore) RecordAudit(ctx context.Context, event ClusterAuditEvent) error {
	if len(event.Payload) == 0 {
		event.Payload = json.RawMessage(`{}`)
	}
	_, err := s.db.Exec(ctx, `
		INSERT INTO cluster_audit_events (id, cluster_id, actor_user_id, event_type, target_type, target_id, payload, created_at)
		VALUES ($1::uuid, $2::uuid, $3::uuid, $4, $5, $6, $7::jsonb, COALESCE($8, NOW()))
	`, uuid.NewString(), event.ClusterID, event.ActorUserID, event.EventType, event.TargetType, event.TargetID, []byte(event.Payload), event.CreatedAt)
	return err
}

func (s *PostgresStore) ListAuditEvents(ctx context.Context, input ListAuditEventsInput) ([]ClusterAuditEvent, error) {
	input.ClusterID = strings.TrimSpace(input.ClusterID)
	input.EventTypes = compactStringSlice(input.EventTypes)
	input.TargetTypes = compactStringSlice(input.TargetTypes)
	if input.Limit <= 0 || input.Limit > 200 {
		input.Limit = 100
	}
	rows, err := s.db.Query(ctx, `
		SELECT id::text, cluster_id::text, actor_user_id::text, event_type, target_type, target_id, payload, created_at
		FROM cluster_audit_events
		WHERE cluster_id = $1::uuid
		  AND (cardinality($2::text[]) = 0 OR event_type = ANY($2::text[]))
		  AND (cardinality($3::text[]) = 0 OR target_type = ANY($3::text[]))
		ORDER BY created_at DESC
		LIMIT $4
	`, input.ClusterID, input.EventTypes, input.TargetTypes, input.Limit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []ClusterAuditEvent
	for rows.Next() {
		item, err := scanAuditEvent(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func compactStringSlice(values []string) []string {
	out := []string{}
	for _, value := range values {
		trimmed := strings.TrimSpace(value)
		if trimmed == "" || containsString(out, trimmed) {
			continue
		}
		out = append(out, trimmed)
	}
	return out
}

type scanner interface {
	Scan(dest ...any) error
}

type rowQuerier interface {
	Query(ctx context.Context, sql string, args ...any) (pgx.Rows, error)
}

func scanCluster(row scanner) (Cluster, error) {
	var item Cluster
	if err := row.Scan(&item.ID, &item.Slug, &item.Name, &item.Status, &item.Region, &item.Metadata, &item.CreatedAt, &item.UpdatedAt); err != nil {
		return Cluster{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanClusterAuthority(row scanner) (ClusterAuthorityKey, error) {
	var item ClusterAuthorityKey
	if err := row.Scan(
		&item.ClusterID,
		&item.AuthorityState,
		&item.KeyAlgorithm,
		&item.PublicKey,
		&item.PublicKeyFingerprint,
		&item.PrivateKey,
		&item.CreatedAt,
		&item.UpdatedAt,
		&item.Metadata,
	); err != nil {
		return ClusterAuthorityKey{}, err
	}
	item.SchemaVersion = clusterauth.AuthoritySchemaVersion
	ensureRaw(&item.Metadata, `{}`)
	item.QuorumDescriptor = clusterAuthorityQuorumDescriptorFromMetadata(item.Metadata)
	return item, nil
}

func clusterAuthorityQuorumDescriptorFromMetadata(metadata json.RawMessage) *QuorumDescriptor {
	if len(metadata) == 0 || !json.Valid(metadata) {
		return nil
	}
	var envelope struct {
		QuorumDescriptor *QuorumDescriptor `json:"quorum_descriptor"`
		Quorum           *QuorumDescriptor `json:"quorum"`
	}
	if err := json.Unmarshal(metadata, &envelope); err != nil {
		return nil
	}
	if envelope.QuorumDescriptor != nil {
		return envelope.QuorumDescriptor
	}
	return envelope.Quorum
}

func scanNodeGroup(row scanner) (ClusterNodeGroup, error) {
	var item ClusterNodeGroup
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.ParentGroupID,
		&item.Name,
		&item.Description,
		&item.SortOrder,
		&item.Metadata,
		&item.CreatedByUserID,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return ClusterNodeGroup{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanClusterNode(row scanner) (ClusterNode, error) {
	var item ClusterNode
	if err := row.Scan(
		&item.ID,
		&item.OwnerOrganizationID,
		&item.NodeKey,
		&item.Name,
		&item.OwnershipType,
		&item.RegistrationStatus,
		&item.HealthStatus,
		&item.VersionState,
		&item.PartitionState,
		&item.ReportedVersion,
		&item.LastSeenAt,
		&item.MembershipStatus,
		&item.MembershipMetadata,
		&item.NodeGroupID,
		&item.NodeGroupName,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return ClusterNode{}, err
	}
	ensureRaw(&item.MembershipMetadata, `{}`)
	return item, nil
}

func scanJoinToken(row scanner) (NodeJoinToken, error) {
	var item NodeJoinToken
	var signatureRaw json.RawMessage
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.Scope,
		&item.ExpiresAt,
		&item.MaxUses,
		&item.UsedCount,
		&item.Status,
		&item.CreatedByUserID,
		&item.CreatedAt,
		&item.RevokedAt,
		&item.AuthorityPayload,
		&signatureRaw,
	); err != nil {
		return NodeJoinToken{}, err
	}
	ensureRaw(&item.Scope, `{}`)
	ensureRaw(&item.AuthorityPayload, `{}`)
	if len(signatureRaw) > 0 && string(signatureRaw) != "{}" {
		var signature ClusterSignature
		if err := json.Unmarshal(signatureRaw, &signature); err != nil {
			return NodeJoinToken{}, err
		}
		item.AuthoritySignature = &signature
	}
	return item, nil
}

func scanJoinRequest(row scanner) (NodeJoinRequest, error) {
	var item NodeJoinRequest
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.JoinTokenID,
		&item.NodeName,
		&item.NodeFingerprint,
		&item.PublicKey,
		&item.ReportedCapabilities,
		&item.ReportedFacts,
		&item.RequestedRoles,
		&item.Status,
		&item.ReviewedByUserID,
		&item.ReviewedAt,
		&item.ApprovedNodeID,
		&item.RejectionReason,
		&item.CreatedAt,
		&item.UpdatedAt,
		&item.ApprovalPayload,
		&item.ApprovalSignature,
	); err != nil {
		return NodeJoinRequest{}, err
	}
	ensureRaw(&item.ReportedCapabilities, `{}`)
	ensureRaw(&item.ReportedFacts, `{}`)
	ensureRaw(&item.RequestedRoles, `[]`)
	ensureRaw(&item.ApprovalPayload, `{}`)
	ensureRaw(&item.ApprovalSignature, `{}`)
	return item, nil
}

func scanRoleAssignment(row scanner) (NodeRoleAssignment, error) {
	var item NodeRoleAssignment
	if err := row.Scan(&item.ID, &item.ClusterID, &item.NodeID, &item.OrganizationID, &item.Role, &item.Status, &item.Policy, &item.AssignedByUserID, &item.AssignedAt, &item.RevokedAt); err != nil {
		return NodeRoleAssignment{}, err
	}
	ensureRaw(&item.Policy, `{}`)
	return item, nil
}

func scanHeartbeat(row scanner) (NodeHeartbeat, error) {
	var item NodeHeartbeat
	if err := row.Scan(&item.ID, &item.ClusterID, &item.NodeID, &item.HealthStatus, &item.ReportedVersion, &item.Capabilities, &item.ServiceStates, &item.Metadata, &item.ObservedAt); err != nil {
		return NodeHeartbeat{}, err
	}
	ensureRaw(&item.Capabilities, `{}`)
	ensureRaw(&item.ServiceStates, `{}`)
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanReleaseVersion(row scanner) (ReleaseVersion, error) {
	var item ReleaseVersion
	var signatureRaw json.RawMessage
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.Product,
		&item.Version,
		&item.Channel,
		&item.Status,
		&item.Compatibility,
		&item.Changelog,
		&item.CreatedByUserID,
		&item.CreatedAt,
		&item.AuthorityPayload,
		&signatureRaw,
	); err != nil {
		return ReleaseVersion{}, err
	}
	ensureRaw(&item.Compatibility, `{}`)
	ensureRaw(&item.AuthorityPayload, `{}`)
	if len(signatureRaw) > 0 && string(signatureRaw) != "{}" {
		var signature ClusterSignature
		if err := json.Unmarshal(signatureRaw, &signature); err != nil {
			return ReleaseVersion{}, err
		}
		item.AuthoritySignature = &signature
	}
	return item, nil
}

func scanReleaseArtifact(row scanner) (ReleaseArtifact, error) {
	var item ReleaseArtifact
	if err := row.Scan(
		&item.ID,
		&item.ReleaseID,
		&item.ClusterID,
		&item.Product,
		&item.Version,
		&item.OS,
		&item.Arch,
		&item.InstallType,
		&item.Kind,
		&item.URL,
		&item.SHA256,
		&item.SizeBytes,
		&item.Signature,
		&item.Metadata,
		&item.CreatedAt,
	); err != nil {
		return ReleaseArtifact{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	item.URLs = releaseArtifactURLsFromMetadata(item.Metadata)
	return item, nil
}

func releaseArtifactURLsFromMetadata(metadata json.RawMessage) []string {
	var payload map[string]json.RawMessage
	if len(metadata) == 0 || json.Unmarshal(metadata, &payload) != nil {
		return nil
	}
	for _, key := range []string{"artifact_urls", "urls"} {
		raw, ok := payload[key]
		if !ok {
			continue
		}
		var urls []string
		if json.Unmarshal(raw, &urls) != nil {
			continue
		}
		out := make([]string, 0, len(urls))
		seen := map[string]bool{}
		for _, url := range urls {
			url = strings.TrimSpace(url)
			if url == "" || seen[url] {
				continue
			}
			seen[url] = true
			out = append(out, url)
		}
		return out
	}
	return nil
}

func scanNodeUpdatePolicy(row scanner) (NodeUpdatePolicy, error) {
	var item NodeUpdatePolicy
	if err := row.Scan(
		&item.ClusterID,
		&item.NodeID,
		&item.Product,
		&item.Channel,
		&item.TargetVersion,
		&item.Strategy,
		&item.Enabled,
		&item.RollbackAllowed,
		&item.HealthWindowSec,
		&item.UpdatedByUserID,
		&item.UpdatedAt,
	); err != nil {
		return NodeUpdatePolicy{}, err
	}
	return item, nil
}

func scanNodeUpdateStatus(row scanner) (NodeUpdateStatus, error) {
	var item NodeUpdateStatus
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.NodeID,
		&item.Product,
		&item.CurrentVersion,
		&item.TargetVersion,
		&item.Phase,
		&item.Status,
		&item.AttemptID,
		&item.ErrorMessage,
		&item.RollbackVersion,
		&item.Payload,
		&item.ObservedAt,
	); err != nil {
		return NodeUpdateStatus{}, err
	}
	ensureRaw(&item.Payload, `{}`)
	return item, nil
}

func scanAuditEvent(row scanner) (ClusterAuditEvent, error) {
	var item ClusterAuditEvent
	if err := row.Scan(&item.ID, &item.ClusterID, &item.ActorUserID, &item.EventType, &item.TargetType, &item.TargetID, &item.Payload, &item.CreatedAt); err != nil {
		return ClusterAuditEvent{}, err
	}
	ensureRaw(&item.Payload, `{}`)
	return item, nil
}

func scanFabricTestingFlag(row scanner) (FabricTestingFlag, error) {
	var item FabricTestingFlag
	if err := row.Scan(
		&item.ID,
		&item.ScopeType,
		&item.ScopeID,
		&item.ClusterID,
		&item.Enabled,
		&item.TelemetryEnabled,
		&item.SyntheticLinksEnabled,
		&item.HistoryRetentionHours,
		&item.Metadata,
		&item.UpdatedByUserID,
		&item.UpdatedAt,
	); err != nil {
		return FabricTestingFlag{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanNodeTelemetry(row scanner) (NodeTelemetryObservation, error) {
	var item NodeTelemetryObservation
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.NodeID,
		&item.CPUPercent,
		&item.MemoryUsedBytes,
		&item.MemoryTotalBytes,
		&item.DiskUsedBytes,
		&item.DiskTotalBytes,
		&item.NetworkRxBytes,
		&item.NetworkTxBytes,
		&item.ProcessCount,
		&item.Payload,
		&item.ObservedAt,
	); err != nil {
		return NodeTelemetryObservation{}, err
	}
	ensureRaw(&item.Payload, `{}`)
	return item, nil
}

func scanDesiredWorkload(row scanner) (NodeWorkloadDesiredState, error) {
	var item NodeWorkloadDesiredState
	if err := row.Scan(
		&item.ClusterID,
		&item.NodeID,
		&item.ServiceType,
		&item.DesiredState,
		&item.Version,
		&item.RuntimeMode,
		&item.ArtifactRef,
		&item.Config,
		&item.Environment,
		&item.UpdatedByUserID,
		&item.UpdatedAt,
	); err != nil {
		return NodeWorkloadDesiredState{}, err
	}
	ensureRaw(&item.Config, `{}`)
	ensureRaw(&item.Environment, `{}`)
	return item, nil
}

func scanWorkloadStatus(row scanner) (NodeWorkloadStatus, error) {
	var item NodeWorkloadStatus
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.NodeID,
		&item.ServiceType,
		&item.ReportedState,
		&item.RuntimeMode,
		&item.Version,
		&item.StatusPayload,
		&item.ObservedAt,
	); err != nil {
		return NodeWorkloadStatus{}, err
	}
	ensureRaw(&item.StatusPayload, `{}`)
	return item, nil
}

func scanMeshLink(row scanner) (MeshLinkObservation, error) {
	var item MeshLinkObservation
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.SourceNodeID,
		&item.TargetNodeID,
		&item.LinkStatus,
		&item.LatencyMs,
		&item.QualityScore,
		&item.Metadata,
		&item.ObservedAt,
	); err != nil {
		return MeshLinkObservation{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanRouteIntent(row scanner) (MeshRouteIntent, error) {
	var item MeshRouteIntent
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.SourceSelector,
		&item.DestinationSelector,
		&item.ServiceClass,
		&item.Priority,
		&item.Status,
		&item.Policy,
		&item.CreatedByUserID,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return MeshRouteIntent{}, err
	}
	ensureRaw(&item.SourceSelector, `{}`)
	ensureRaw(&item.DestinationSelector, `{}`)
	ensureRaw(&item.Policy, `{}`)
	return item, nil
}

func scanFabricServiceChannelRouteFeedback(row scanner) (FabricServiceChannelRouteFeedbackObservation, error) {
	var item FabricServiceChannelRouteFeedbackObservation
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.ReporterNodeID,
		&item.RouteID,
		&item.ServiceClass,
		&item.FeedbackStatus,
		&item.ScoreAdjustment,
		&item.Reasons,
		&item.LastError,
		&item.ConsecutiveFailures,
		&item.StallCount,
		&item.LastSendDurationMs,
		&item.Payload,
		&item.ObservedAt,
		&item.ExpiresAt,
	); err != nil {
		return FabricServiceChannelRouteFeedbackObservation{}, err
	}
	ensureRaw(&item.Payload, `{}`)
	item.RetryCooldownUntil = fabricServiceChannelRetryCooldownUntil(item.Payload)
	return item, nil
}

func scanFabricServiceChannelLeaseRecord(row scanner) (FabricServiceChannelLeaseRecord, error) {
	var item FabricServiceChannelLeaseRecord
	var rawLease json.RawMessage
	if err := row.Scan(
		&item.ClusterID,
		&item.ChannelID,
		&item.TokenHash,
		&item.ResourceID,
		&item.ServiceClass,
		&item.SelectedEntryNodeID,
		&item.ExpiresAt,
		&rawLease,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return FabricServiceChannelLeaseRecord{}, err
	}
	if len(rawLease) > 0 {
		if err := json.Unmarshal(rawLease, &item.Lease); err != nil {
			return FabricServiceChannelLeaseRecord{}, err
		}
	}
	return item, nil
}

func scanFabricServiceChannelRouteRebuildAttempt(row scanner) (FabricServiceChannelRouteRebuildAttempt, error) {
	var item FabricServiceChannelRouteRebuildAttempt
	var timeline json.RawMessage
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.ReporterNodeID,
		&item.ServiceClass,
		&item.RouteID,
		&item.ReplacementRouteID,
		&item.RebuildRequestID,
		&item.RebuildStatus,
		&item.RebuildReason,
		&item.RebuildAttempt,
		&item.DecisionSource,
		&item.Outcome,
		&item.Generation,
		&item.PolicyFingerprint,
		&item.ObservedPolicyFingerprint,
		&item.ObservedRouteGeneration,
		&item.EffectiveRouteGeneration,
		&item.FeedbackStatus,
		&item.FeedbackScoreAdjustment,
		&item.FeedbackEffectiveScoreAdjustment,
		&item.FeedbackReasons,
		&item.LastError,
		&item.ConsecutiveFailures,
		&item.StallCount,
		&item.LastSendDurationMs,
		&item.QualityWindowSampleCount,
		&item.QualityWindowFailureCount,
		&item.QualityWindowDropCount,
		&item.QualityWindowSlowCount,
		&item.OldHops,
		&item.ReplacementHops,
		&item.NodeTransitionStatus,
		&item.NodeTransitionGeneration,
		&item.NodeTransitionObservedAt,
		&item.NodeTransitionMatched,
		&item.NodeRouteGenerationStatus,
		&item.NodeRouteGenerationAppliedAt,
		&item.NodeRouteGenerationWithdrawnAt,
		&item.NodeRouteGenerationMatched,
		&item.PostRebuildSelectedRouteID,
		&item.PostRebuildSendPackets,
		&item.PostRebuildSendFailures,
		&item.PostRebuildSendFlowPackets,
		&item.PostRebuildSendFlowDropped,
		&item.GuardStatus,
		&item.GuardSeverity,
		&item.GuardReason,
		&item.GuardTransitionDeadlineSeconds,
		&item.GuardTrafficDeadlineSeconds,
		&timeline,
		&item.CorrelationSnapshotAt,
		&item.Payload,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return FabricServiceChannelRouteRebuildAttempt{}, err
	}
	ensureRaw(&item.Payload, `{}`)
	if len(timeline) > 0 && string(timeline) != "null" {
		_ = json.Unmarshal(timeline, &item.Timeline)
	}
	enrichFabricServiceChannelRouteRebuildAttemptFeedbackCorrelation(&item)
	return item, nil
}

func enrichFabricServiceChannelRouteRebuildAttemptFeedbackCorrelation(item *FabricServiceChannelRouteRebuildAttempt) {
	if item == nil || len(item.Payload) == 0 || !json.Valid(item.Payload) {
		return
	}
	payload := jsonObject(item.Payload)
	item.FeedbackObservationID = firstNonEmptyString(item.FeedbackObservationID, jsonString(payload, "feedback_observation_id"))
	item.FeedbackSource = firstNonEmptyString(item.FeedbackSource, jsonString(payload, "feedback_source"))
	item.FeedbackChannelID = firstNonEmptyString(item.FeedbackChannelID, jsonString(payload, "feedback_channel_id"))
	item.FeedbackResourceID = firstNonEmptyString(item.FeedbackResourceID, jsonString(payload, "feedback_resource_id"))
	item.FeedbackViolationStatus = firstNonEmptyString(item.FeedbackViolationStatus, jsonString(payload, "feedback_violation_status"))
	item.FeedbackViolationReason = firstNonEmptyString(item.FeedbackViolationReason, jsonString(payload, "feedback_violation_reason"))
	if item.FeedbackObservedAt == nil {
		item.FeedbackObservedAt = parseOptionalPayloadTime(jsonString(payload, "feedback_observed_at"))
	}
	if item.FeedbackExpiresAt == nil {
		item.FeedbackExpiresAt = parseOptionalPayloadTime(jsonString(payload, "feedback_expires_at"))
	}
}

func parseOptionalPayloadTime(value string) *time.Time {
	value = strings.TrimSpace(value)
	if value == "" {
		return nil
	}
	parsed, err := time.Parse(time.RFC3339Nano, value)
	if err != nil {
		return nil
	}
	parsed = parsed.UTC()
	return &parsed
}

func scanFabricServiceChannelRouteRebuildAlertSilence(row scanner) (FabricServiceChannelRouteRebuildAlertSilence, error) {
	var item FabricServiceChannelRouteRebuildAlertSilence
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.ReporterNodeID,
		&item.RouteID,
		&item.GuardStatus,
		&item.Generation,
		&item.Reason,
		&item.CreatedByUserID,
		&item.CreatedAt,
		&item.ExpiresAt,
		&item.Payload,
	); err != nil {
		return FabricServiceChannelRouteRebuildAlertSilence{}, err
	}
	ensureRaw(&item.Payload, `{}`)
	item.DisplayRouteID = item.RouteID
	var payload map[string]any
	if err := json.Unmarshal(item.Payload, &payload); err == nil && payload != nil {
		if value, ok := payload["incident_source"].(string); ok {
			item.IncidentSource = strings.TrimSpace(value)
		}
		if value, ok := payload["channel_id"].(string); ok {
			item.ChannelID = strings.TrimSpace(value)
		}
	}
	if channelID, routeID, ok := fabricServiceChannelParseAccessDecisionSilenceRouteID(item.RouteID); ok {
		item.IncidentSource = firstNonEmptyString(item.IncidentSource, "access_decision")
		item.ChannelID = firstNonEmptyString(item.ChannelID, channelID)
		item.DisplayRouteID = routeID
	}
	return item, nil
}

func scanQoSPolicy(row scanner) (MeshQoSPolicy, error) {
	var item MeshQoSPolicy
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.ServiceClass,
		&item.Priority,
		&item.ReliabilityMode,
		&item.DropPolicy,
		&item.BandwidthPolicy,
		&item.Metadata,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return MeshQoSPolicy{}, err
	}
	ensureRaw(&item.BandwidthPolicy, `{}`)
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanFabricEntryPoint(row scanner) (FabricEntryPoint, error) {
	var item FabricEntryPoint
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.Name,
		&item.Status,
		&item.EndpointType,
		&item.PublicEndpoint,
		&item.Policy,
		&item.Metadata,
		&item.CreatedByUserID,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return FabricEntryPoint{}, err
	}
	ensureRaw(&item.Policy, `{}`)
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanFabricEntryPointNode(row scanner) (FabricEntryPointNode, error) {
	var item FabricEntryPointNode
	if err := row.Scan(
		&item.EntryPointID,
		&item.ClusterID,
		&item.NodeID,
		&item.Status,
		&item.Priority,
		&item.Metadata,
		&item.AddedByUserID,
		&item.AddedAt,
	); err != nil {
		return FabricEntryPointNode{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanFabricEgressPool(row scanner) (FabricEgressPool, error) {
	var item FabricEgressPool
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.Name,
		&item.Status,
		&item.Description,
		&item.RouteScope,
		&item.Policy,
		&item.Metadata,
		&item.CreatedByUserID,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return FabricEgressPool{}, err
	}
	ensureRaw(&item.RouteScope, `{}`)
	ensureRaw(&item.Policy, `{}`)
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanFabricEgressPoolNode(row scanner) (FabricEgressPoolNode, error) {
	var item FabricEgressPoolNode
	if err := row.Scan(
		&item.EgressPoolID,
		&item.ClusterID,
		&item.NodeID,
		&item.Status,
		&item.Priority,
		&item.Metadata,
		&item.AddedByUserID,
		&item.AddedAt,
	); err != nil {
		return FabricEgressPoolNode{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanAuthorityState(row scanner) (ClusterAuthorityState, error) {
	var item ClusterAuthorityState
	if err := row.Scan(
		&item.ClusterID,
		&item.AuthorityState,
		&item.MutationMode,
		&item.Term,
		&item.Notes,
		&item.UpdatedByUserID,
		&item.UpdatedAt,
	); err != nil {
		return ClusterAuthorityState{}, err
	}
	return item, nil
}

func (s *PostgresStore) GetVPNClientProfile(
	ctx context.Context,
	clusterID, organizationID, userID, preferredEntryNodeID, preferredExitNodeID string,
	generatedAt time.Time,
) (VPNClientProfile, error) {
	var allowed bool
	if err := s.db.QueryRow(ctx, `
		SELECT EXISTS (
			SELECT 1
			FROM organization_memberships
			WHERE organization_id = $1::uuid
			  AND user_id = $2::uuid
			  AND status = 'active'
		)
	`, organizationID, userID).Scan(&allowed); err != nil {
		return VPNClientProfile{}, err
	}
	if !allowed {
		return VPNClientProfile{}, ErrVPNLeaseOwnerNotAllowed
	}
	rows, err := s.db.Query(ctx, `
		SELECT vc.id::text,
		       vc.name,
		       vc.protocol_family,
		       vc.mode,
		       vc.desired_state,
		       vc.status,
		       vc.target_endpoint,
		       vc.routing_usage,
		       vc.route_policy,
		       vc.qos_policy,
		       vc.placement_policy,
		       COALESCE((
		           SELECT jsonb_agg(van.node_id::text ORDER BY van.created_at, van.node_id::text)
		           FROM vpn_connection_allowed_nodes van
		           WHERE van.vpn_connection_id = vc.id
		             AND van.status = 'active'
		       ), '[]'::jsonb) AS allowed_node_ids,
		       COALESCE(vc.placement_policy->'entry_node_ids', '[]'::jsonb) AS entry_node_ids,
		       COALESCE(vc.placement_policy->>'exit_node_id', '') AS exit_node_id,
		       COALESCE(pool.id::text, '') AS exit_pool_id,
		       COALESCE(pool.name, vc.name) AS exit_pool_name,
		       CASE WHEN l.id IS NULL THEN NULL ELSE jsonb_build_object(
		           'lease_id', l.id::text,
		           'owner_node_id', l.owner_node_id::text,
		           'lease_generation', l.lease_generation,
		           'status', l.status,
		           'renewed_at', l.renewed_at,
		           'expires_at', l.expires_at
		       ) END AS active_lease,
		       COALESCE((
		           SELECT jsonb_agg(jsonb_build_object(
		               'id', rp.id::text,
		               'route_type', rp.route_type,
		               'destination', rp.destination,
		               'action', rp.action,
		               'service_type', rp.service_type,
		               'priority', rp.priority,
		               'policy', rp.policy,
		               'status', rp.status
		           ) ORDER BY rp.priority, rp.destination)
		           FROM vpn_connection_route_policies rp
		           WHERE rp.vpn_connection_id = vc.id
		             AND rp.status = 'active'
		       ), '[]'::jsonb) AS route_policies,
		       COALESCE(vc.metadata->'client_config', '{}'::jsonb) ||
		       jsonb_build_object('vpn_address', '10.77.0.2/24') ||
		       CASE
		           WHEN COALESCE((vc.route_policy->>'full_tunnel')::boolean, false)
		           THEN jsonb_build_object('routes', jsonb_build_array('0.0.0.0/0'))
		           ELSE '{}'::jsonb
		       END ||
		       CASE
		           WHEN jsonb_typeof(gateway_status.status_payload->'exit_dns_servers') = 'array'
		            AND jsonb_array_length(gateway_status.status_payload->'exit_dns_servers') > 0
		           THEN jsonb_build_object('dns_servers', gateway_status.status_payload->'exit_dns_servers')
		           WHEN jsonb_typeof(vc.route_policy->'dns_servers') = 'array'
		            AND jsonb_array_length(vc.route_policy->'dns_servers') > 0
		           THEN jsonb_build_object('dns_servers', vc.route_policy->'dns_servers')
		           WHEN jsonb_typeof(vc.target_endpoint->'dns_servers') = 'array'
		            AND jsonb_array_length(vc.target_endpoint->'dns_servers') > 0
		           THEN jsonb_build_object('dns_servers', vc.target_endpoint->'dns_servers')
		           ELSE '{}'::jsonb
		       END ||
		       CASE WHEN l.id IS NULL THEN '{}'::jsonb ELSE jsonb_strip_nulls(jsonb_build_object(
		           'runtime_status', CASE
		               WHEN COALESCE((gateway_status.status_payload->>'packet_forwarding')::boolean, false) THEN 'packet_forwarding_active'
		               WHEN COALESCE((gateway_status.status_payload->>'runtime_available')::boolean, false) THEN 'runtime_available'
		               WHEN gateway_status.observed_status IS NOT NULL THEN gateway_status.observed_status
		               ELSE 'lease_active'
		           END,
		           'gateway_node_id', l.owner_node_id::text,
		           'gateway_assignment_status', gateway_status.observed_status,
		           'gateway_interface', gateway_status.status_payload->>'gateway_interface',
		           'gateway_vpn_cidr', gateway_status.status_payload->>'gateway_vpn_cidr',
		           'relay_transport', gateway_status.status_payload->>'relay_transport',
		           'packet_forwarding', COALESCE((gateway_status.status_payload->>'packet_forwarding')::boolean, false),
		           'runtime_available', COALESCE((gateway_status.status_payload->>'runtime_available')::boolean, false),
		           'runtime_observed_at', gateway_status.observed_at
		       )) END AS client_config
		FROM vpn_connections vc
		LEFT JOIN LATERAL (
		    SELECT ep.id, ep.name
		    FROM fabric_egress_pools ep
		    WHERE ep.cluster_id = vc.cluster_id
		      AND ep.status = 'active'
		      AND (
		          ep.id::text = COALESCE(vc.placement_policy->>'exit_pool_id', '')
		          OR ep.name = COALESCE(vc.placement_policy->>'exit_pool_name', '')
		          OR EXISTS (
		              SELECT 1
		              FROM fabric_egress_pool_nodes epn
		              WHERE epn.egress_pool_id = ep.id
		                AND epn.cluster_id = vc.cluster_id
		                AND epn.status = 'active'
		                AND epn.node_id::text = ANY (
		                    SELECT jsonb_array_elements_text(COALESCE(vc.placement_policy->'exit_node_ids', '[]'::jsonb))
		                )
		          )
		      )
		    ORDER BY
		        CASE
		            WHEN ep.id::text = COALESCE(vc.placement_policy->>'exit_pool_id', '') THEN 0
		            WHEN ep.name = COALESCE(vc.placement_policy->>'exit_pool_name', '') THEN 1
		            ELSE 2
		        END,
		        ep.name
		    LIMIT 1
		) pool ON TRUE
		LEFT JOIN vpn_connection_leases l
		       ON l.cluster_id = vc.cluster_id
		      AND l.vpn_connection_id = vc.id
		      AND l.status = 'active'
		      AND l.expires_at > NOW()
		LEFT JOIN vpn_connection_assignment_latest_statuses gateway_status
		       ON gateway_status.cluster_id = vc.cluster_id
		      AND gateway_status.vpn_connection_id = vc.id
		      AND gateway_status.node_id = l.owner_node_id
		WHERE vc.cluster_id = $1::uuid
		  AND vc.organization_id = $2::uuid
		  AND vc.desired_state = 'enabled'
		ORDER BY vc.name ASC, vc.id ASC
	`, clusterID, organizationID)
	if err != nil {
		return VPNClientProfile{}, err
	}
	defer rows.Close()
	profile := VPNClientProfile{
		SchemaVersion:  "rap.vpn_client_profile.v1",
		ClusterID:      clusterID,
		OrganizationID: organizationID,
		UserID:         userID,
		GeneratedAt:    generatedAt,
	}
	for rows.Next() {
		var item VPNClientConnection
		var allowedRaw, entryRaw []byte
		var activeLeaseRaw []byte
		if err := rows.Scan(
			&item.ID,
			&item.Name,
			&item.ProtocolFamily,
			&item.Mode,
			&item.DesiredState,
			&item.Status,
			&item.TargetEndpoint,
			&item.RoutingUsage,
			&item.RoutePolicy,
			&item.QoSPolicy,
			&item.PlacementPolicy,
			&allowedRaw,
			&entryRaw,
			&item.ExitNodeID,
			&item.ExitPoolID,
			&item.ExitPoolName,
			&activeLeaseRaw,
			&item.RoutePolicies,
			&item.ClientConfig,
		); err != nil {
			return VPNClientProfile{}, err
		}
		_ = json.Unmarshal(allowedRaw, &item.AllowedNodeIDs)
		_ = json.Unmarshal(entryRaw, &item.EntryNodeIDs)
		if len(activeLeaseRaw) > 0 && string(activeLeaseRaw) != "null" {
			var lease NodeVPNAssignmentLease
			if err := json.Unmarshal(activeLeaseRaw, &lease); err == nil {
				item.ActiveLease = &lease
			}
		}
		ensureRaw(&item.TargetEndpoint, `{}`)
		ensureRaw(&item.RoutingUsage, `[]`)
		ensureRaw(&item.RoutePolicy, `{}`)
		ensureRaw(&item.QoSPolicy, `{}`)
		ensureRaw(&item.PlacementPolicy, `{}`)
		ensureRaw(&item.RoutePolicies, `[]`)
		ensureRaw(&item.ClientConfig, `{}`)
		if item.ExitPoolName != "" || item.ExitPoolID != "" {
			item.ClientConfig = mergeJSONObjects(item.ClientConfig, map[string]any{
				"exit_pool": map[string]any{
					"id":   item.ExitPoolID,
					"name": firstNonEmptyMetadataString(item.ExitPoolName, item.Name),
					"kind": "virtual_pool",
				},
			})
		}
		item.ClientConfig = enrichVPNClientFabricRoute(item, preferredEntryNodeID, preferredExitNodeID)
		profile.Connections = append(profile.Connections, item)
	}
	if err := rows.Err(); err != nil {
		return VPNClientProfile{}, err
	}
	entryEndpoints, err := s.vpnEntryEndpointCandidates(ctx, clusterID, vpnProfileEntryNodeIDs(profile))
	if err != nil {
		return VPNClientProfile{}, err
	}
	exitEndpoints, err := s.vpnEntryEndpointCandidates(ctx, clusterID, vpnProfileExitNodeIDs(profile))
	if err != nil {
		return VPNClientProfile{}, err
	}
	for i := range profile.Connections {
		profile.Connections[i].ClientConfig = enrichVPNClientEntryEndpointCandidates(profile.Connections[i], entryEndpoints)
		profile.Connections[i].ClientConfig = enrichVPNClientExitEndpointCandidates(profile.Connections[i], exitEndpoints)
	}
	return profile, nil
}

func scanVPNConnection(row scanner) (VPNConnection, error) {
	var item VPNConnection
	if err := row.Scan(
		&item.ID,
		&item.ClusterID,
		&item.OrganizationID,
		&item.Name,
		&item.TargetEndpoint,
		&item.ProtocolFamily,
		&item.CredentialRef,
		&item.Mode,
		&item.DesiredState,
		&item.AllowedNodePolicy,
		&item.RoutingUsage,
		&item.RoutePolicy,
		&item.QoSPolicy,
		&item.PlacementPolicy,
		&item.Status,
		&item.Metadata,
		&item.CreatedByUserID,
		&item.UpdatedByUserID,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return VPNConnection{}, err
	}
	ensureRaw(&item.TargetEndpoint, `{}`)
	ensureRaw(&item.AllowedNodePolicy, `{"mode":"explicit","node_ids":[]}`)
	ensureRaw(&item.RoutingUsage, `[]`)
	ensureRaw(&item.RoutePolicy, `{}`)
	ensureRaw(&item.QoSPolicy, `{}`)
	ensureRaw(&item.PlacementPolicy, `{}`)
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanVPNConnections(rows pgx.Rows) ([]VPNConnection, error) {
	var out []VPNConnection
	for rows.Next() {
		item, err := scanVPNConnection(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func scanVPNAllowedNode(row scanner) (VPNConnectionAllowedNode, error) {
	var item VPNConnectionAllowedNode
	if err := row.Scan(
		&item.VPNConnectionID,
		&item.ClusterID,
		&item.NodeID,
		&item.RolePreference,
		&item.Status,
		&item.Metadata,
		&item.CreatedByUserID,
		&item.CreatedAt,
	); err != nil {
		return VPNConnectionAllowedNode{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func vpnProfileEntryNodeIDs(profile VPNClientProfile) []string {
	var out []string
	for _, connection := range profile.Connections {
		route := vpnFabricRouteFromClientConfig(connection.ClientConfig)
		out = append(out, route.SelectedEntryNodeID)
		out = append(out, connection.EntryNodeIDs...)
	}
	return dedupeStrings(out)
}

func vpnProfileExitNodeIDs(profile VPNClientProfile) []string {
	var out []string
	for _, connection := range profile.Connections {
		route := vpnFabricRouteFromClientConfig(connection.ClientConfig)
		out = append(out, route.SelectedExitNodeID)
		out = append(out, route.ExitPoolNodeIDs...)
		out = append(out, connection.ExitNodeID)
		out = append(out, connection.AllowedNodeIDs...)
	}
	return dedupeStrings(out)
}

func (s *PostgresStore) vpnEntryEndpointCandidates(ctx context.Context, clusterID string, entryNodeIDs []string) (map[string][]map[string]any, error) {
	entryNodeIDs = dedupeStrings(entryNodeIDs)
	out := make(map[string][]map[string]any, len(entryNodeIDs))
	if len(entryNodeIDs) == 0 {
		return out, nil
	}
	rows, err := s.db.Query(ctx, `
		SELECT node_id::text, capabilities, metadata
		FROM node_latest_heartbeats
		WHERE cluster_id = $1::uuid
		  AND node_id::text = ANY($2::text[])
	`, clusterID, entryNodeIDs)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	for rows.Next() {
		var nodeID string
		var capabilities json.RawMessage
		var metadata json.RawMessage
		if err := rows.Scan(&nodeID, &capabilities, &metadata); err != nil {
			return nil, err
		}
		candidates := vpnEntryEndpointCandidatesFromHeartbeat(nodeID, capabilities, metadata)
		if len(candidates) > 0 {
			out[nodeID] = candidates
		}
	}
	return out, rows.Err()
}

func vpnEntryEndpointCandidatesFromHeartbeat(nodeID string, capabilities json.RawMessage, metadata json.RawMessage) []map[string]any {
	var payload struct {
		MeshEndpointReport struct {
			PeerEndpoint       string                  `json:"peer_endpoint"`
			Transport          string                  `json:"transport"`
			ConnectivityMode   string                  `json:"connectivity_mode"`
			NATType            string                  `json:"nat_type"`
			Region             string                  `json:"region"`
			EndpointCandidates []PeerEndpointCandidate `json:"endpoint_candidates"`
		} `json:"mesh_endpoint_report"`
	}
	if len(metadata) == 0 || json.Unmarshal(metadata, &payload) != nil {
		return nil
	}
	certByCandidate := endpointCandidateCertsFromHeartbeatMetadata(metadata)
	report := payload.MeshEndpointReport
	var out []map[string]any
	seen := map[string]struct{}{}
	for _, candidate := range report.EndpointCandidates {
		address := strings.TrimSpace(candidate.Address)
		candidateNodeID := strings.TrimSpace(candidate.NodeID)
		if candidateNodeID == "" {
			candidateNodeID = nodeID
		}
		transport := strings.TrimSpace(candidate.Transport)
		if transport == "" {
			transport = strings.TrimSpace(report.Transport)
		}
		if !usableVPNFabricPeerEndpoint(address, transport) {
			continue
		}
		connectivityMode := strings.TrimSpace(candidate.ConnectivityMode)
		if connectivityMode == "" {
			connectivityMode = strings.TrimSpace(report.ConnectivityMode)
		}
		natType := strings.TrimSpace(candidate.NATType)
		if natType == "" {
			natType = strings.TrimSpace(report.NATType)
		}
		region := strings.TrimSpace(candidate.Region)
		if region == "" {
			region = strings.TrimSpace(report.Region)
		}
		reachability := strings.TrimSpace(candidate.Reachability)
		if reachability == "" {
			reachability = "unverified"
		}
		endpointID := strings.TrimSpace(candidate.EndpointID)
		if endpointID == "" {
			endpointID = "mesh-" + candidateNodeID
		}
		key := candidateNodeID + "\x00" + strings.ToLower(transport) + "\x00" + strings.ToLower(address)
		if _, ok := seen[key]; ok {
			continue
		}
		seen[key] = struct{}{}
		item := map[string]any{
			"node_id":           candidateNodeID,
			"endpoint_id":       endpointID,
			"transport":         transport,
			"address":           address,
			"reachability":      reachability,
			"connectivity_mode": connectivityMode,
			"nat_type":          natType,
			"region":            region,
			"priority":          candidate.Priority,
			"status":            "reported",
			"source":            "node_latest_heartbeat.mesh_endpoint_report.endpoint_candidates",
		}
		if certSHA256 := firstNonEmptyMetadataString(
			endpointCandidateMetadataString(candidate.Metadata, "tls_cert_sha256", "peer_cert_sha256"),
			certByCandidate[endpointID],
			certByCandidate[address],
			certByCandidate[candidateNodeID+"\x00"+address],
		); certSHA256 != "" {
			item["tls_cert_sha256"] = certSHA256
			item["peer_cert_sha256"] = certSHA256
		}
		out = append(out, item)
	}
	if len(out) == 0 {
		address := strings.TrimSpace(report.PeerEndpoint)
		if usableVPNFabricPeerEndpoint(address, strings.TrimSpace(report.Transport)) {
			item := map[string]any{
				"node_id":           nodeID,
				"endpoint_id":       "mesh-peer-endpoint-" + nodeID,
				"transport":         strings.TrimSpace(report.Transport),
				"address":           address,
				"reachability":      "unverified",
				"connectivity_mode": strings.TrimSpace(report.ConnectivityMode),
				"nat_type":          strings.TrimSpace(report.NATType),
				"region":            strings.TrimSpace(report.Region),
				"priority":          100,
				"status":            "reported",
				"source":            "node_latest_heartbeat.mesh_endpoint_report.peer_endpoint",
			}
			out = append(out, item)
		}
	}
	return out
}

func endpointCandidateCertsFromHeartbeatMetadata(metadata json.RawMessage) map[string]string {
	out := map[string]string{}
	var payload map[string]any
	if len(metadata) == 0 || json.Unmarshal(metadata, &payload) != nil {
		return out
	}
	report, _ := payload["mesh_endpoint_report"].(map[string]any)
	candidates, _ := report["endpoint_candidates"].([]any)
	for _, raw := range candidates {
		candidate, _ := raw.(map[string]any)
		if candidate == nil {
			continue
		}
		meta, _ := candidate["metadata"].(map[string]any)
		cert := strings.TrimSpace(metadataAnyString(meta["tls_cert_sha256"]))
		if cert == "" {
			cert = strings.TrimSpace(metadataAnyString(meta["peer_cert_sha256"]))
		}
		if cert == "" {
			continue
		}
		endpointID := strings.TrimSpace(metadataAnyString(candidate["endpoint_id"]))
		address := strings.TrimSpace(metadataAnyString(candidate["address"]))
		nodeID := strings.TrimSpace(metadataAnyString(candidate["node_id"]))
		if endpointID != "" {
			out[endpointID] = cert
		}
		if address != "" {
			out[address] = cert
		}
		if nodeID != "" && address != "" {
			out[nodeID+"\x00"+address] = cert
		}
	}
	return out
}

func metadataAnyString(value any) string {
	switch typed := value.(type) {
	case string:
		return typed
	default:
		return ""
	}
}

func firstNonEmptyMetadataString(values ...string) string {
	for _, value := range values {
		if strings.TrimSpace(value) != "" {
			return strings.TrimSpace(value)
		}
	}
	return ""
}

func usableVPNFabricPeerEndpoint(address string, transport string) bool {
	address = strings.TrimSpace(address)
	if address == "" {
		return false
	}
	transport = strings.ToLower(strings.TrimSpace(transport))
	if !strings.Contains(transport, "quic") {
		return false
	}
	parsed, err := url.Parse(address)
	if err != nil {
		return false
	}
	if strings.ToLower(parsed.Scheme) != "quic" {
		return false
	}
	host := parsed.Hostname()
	if host == "" {
		return false
	}
	ip := net.ParseIP(host)
	if ip == nil {
		return true
	}
	if ip.IsUnspecified() || ip.IsLoopback() {
		return false
	}
	return true
}

func endpointCandidateMetadataString(metadata json.RawMessage, keys ...string) string {
	if len(metadata) == 0 {
		return ""
	}
	var values map[string]any
	if json.Unmarshal(metadata, &values) != nil {
		return ""
	}
	for _, key := range keys {
		if value, ok := values[key].(string); ok && strings.TrimSpace(value) != "" {
			return strings.TrimSpace(value)
		}
	}
	return ""
}

func heartbeatCapabilityEnabled(capabilities json.RawMessage, name string) bool {
	var cfg map[string]any
	if len(capabilities) == 0 || json.Unmarshal(capabilities, &cfg) != nil {
		return false
	}
	value, ok := cfg[name]
	if !ok {
		return false
	}
	switch typed := value.(type) {
	case bool:
		return typed
	case string:
		return strings.EqualFold(strings.TrimSpace(typed), "true") || strings.EqualFold(strings.TrimSpace(typed), "enabled")
	default:
		return false
	}
}

func enrichVPNClientEntryEndpointCandidates(connection VPNClientConnection, endpoints map[string][]map[string]any) json.RawMessage {
	var cfg map[string]any
	if err := json.Unmarshal(connection.ClientConfig, &cfg); err != nil || cfg == nil {
		cfg = map[string]any{}
	}
	route := vpnFabricRouteFromClientConfig(connection.ClientConfig)
	entryIDs := dedupeStrings(append([]string{route.SelectedEntryNodeID}, connection.EntryNodeIDs...))
	var candidates []map[string]any
	seen := map[string]struct{}{}
	for _, nodeID := range entryIDs {
		for _, candidate := range endpoints[nodeID] {
			address, _ := candidate["address"].(string)
			endpointID, _ := candidate["endpoint_id"].(string)
			key := nodeID + "\x00" + endpointID + "\x00" + address
			if _, ok := seen[key]; ok {
				continue
			}
			seen[key] = struct{}{}
			enriched := make(map[string]any, len(candidate)+1)
			for k, v := range candidate {
				enriched[k] = v
			}
			enriched["selected_entry"] = nodeID != "" && nodeID == route.SelectedEntryNodeID
			candidates = append(candidates, enriched)
		}
	}
	cfg["vpn_entry_endpoint_candidates"] = candidates
	cfg["vpn_entry_endpoint_candidate_count"] = len(candidates)
	out, err := json.Marshal(cfg)
	if err != nil {
		return connection.ClientConfig
	}
	return out
}

func enrichVPNClientExitEndpointCandidates(connection VPNClientConnection, endpoints map[string][]map[string]any) json.RawMessage {
	var cfg map[string]any
	if err := json.Unmarshal(connection.ClientConfig, &cfg); err != nil || cfg == nil {
		cfg = map[string]any{}
	}
	route := vpnFabricRouteFromClientConfig(connection.ClientConfig)
	exitIDs := dedupeStrings(append([]string{route.SelectedExitNodeID}, route.ExitPoolNodeIDs...))
	exitIDs = dedupeStrings(append(exitIDs, connection.ExitNodeID))
	exitIDs = dedupeStrings(append(exitIDs, connection.AllowedNodeIDs...))
	var candidates []map[string]any
	seen := map[string]struct{}{}
	for _, nodeID := range exitIDs {
		for _, candidate := range endpoints[nodeID] {
			address, _ := candidate["address"].(string)
			endpointID, _ := candidate["endpoint_id"].(string)
			key := nodeID + "\x00" + endpointID + "\x00" + address
			if _, ok := seen[key]; ok {
				continue
			}
			seen[key] = struct{}{}
			enriched := make(map[string]any, len(candidate)+2)
			for k, v := range candidate {
				enriched[k] = v
			}
			enriched["selected_exit"] = nodeID != "" && nodeID == route.SelectedExitNodeID
			enriched["exit_pool_member"] = true
			candidates = append(candidates, enriched)
		}
	}
	cfg["vpn_exit_endpoint_candidates"] = candidates
	cfg["vpn_exit_endpoint_candidate_count"] = len(candidates)
	out, err := json.Marshal(cfg)
	if err != nil {
		return connection.ClientConfig
	}
	return out
}

func listVPNConnectionAllowedNodes(ctx context.Context, q rowQuerier, clusterID, vpnConnectionID string) ([]VPNConnectionAllowedNode, error) {
	rows, err := q.Query(ctx, `
		SELECT vpn_connection_id::text, cluster_id::text, node_id::text, role_preference,
		       status, metadata, created_by_user_id::text, created_at
		FROM vpn_connection_allowed_nodes
		WHERE cluster_id = $1::uuid
		  AND vpn_connection_id = $2::uuid
		ORDER BY role_preference, created_at DESC
	`, clusterID, vpnConnectionID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var out []VPNConnectionAllowedNode
	for rows.Next() {
		item, err := scanVPNAllowedNode(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func scanVPNRoutePolicy(row scanner) (VPNConnectionRoutePolicy, error) {
	var item VPNConnectionRoutePolicy
	if err := row.Scan(
		&item.ID,
		&item.VPNConnectionID,
		&item.ClusterID,
		&item.OrganizationID,
		&item.RouteType,
		&item.Destination,
		&item.Action,
		&item.ServiceType,
		&item.Priority,
		&item.Policy,
		&item.Status,
		&item.CreatedByUserID,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		return VPNConnectionRoutePolicy{}, err
	}
	ensureRaw(&item.Policy, `{}`)
	return item, nil
}

func scanVPNRoutePolicies(rows pgx.Rows) ([]VPNConnectionRoutePolicy, error) {
	var out []VPNConnectionRoutePolicy
	for rows.Next() {
		item, err := scanVPNRoutePolicy(rows)
		if err != nil {
			return nil, err
		}
		out = append(out, item)
	}
	return out, rows.Err()
}

func scanVPNLease(row scanner) (VPNConnectionLease, error) {
	var item VPNConnectionLease
	if err := row.Scan(
		&item.ID,
		&item.VPNConnectionID,
		&item.ClusterID,
		&item.OwnerNodeID,
		&item.LeaseGeneration,
		&item.FencingToken,
		&item.Status,
		&item.AcquiredAt,
		&item.RenewedAt,
		&item.ExpiresAt,
		&item.ReleasedAt,
		&item.FencedAt,
		&item.Metadata,
	); err != nil {
		return VPNConnectionLease{}, err
	}
	ensureRaw(&item.Metadata, `{}`)
	return item, nil
}

func scanNodeVPNAssignment(row scanner) (NodeVPNAssignment, error) {
	var item NodeVPNAssignment
	var activeLeaseRaw json.RawMessage
	if err := row.Scan(
		&item.VPNConnectionID,
		&item.ClusterID,
		&item.OrganizationID,
		&item.Name,
		&item.TargetEndpoint,
		&item.ProtocolFamily,
		&item.Mode,
		&item.DesiredState,
		&item.RoutingUsage,
		&item.RoutePolicy,
		&item.QoSPolicy,
		&item.PlacementPolicy,
		&item.Status,
		&item.HasCredentialRef,
		&item.AssignmentReason,
		&activeLeaseRaw,
		&item.UpdatedAt,
	); err != nil {
		return NodeVPNAssignment{}, err
	}
	ensureRaw(&item.TargetEndpoint, `{}`)
	ensureRaw(&item.RoutingUsage, `[]`)
	ensureRaw(&item.RoutePolicy, `{}`)
	ensureRaw(&item.QoSPolicy, `{}`)
	ensureRaw(&item.PlacementPolicy, `{}`)
	if len(activeLeaseRaw) > 0 && string(activeLeaseRaw) != "null" {
		var lease NodeVPNAssignmentLease
		if err := json.Unmarshal(activeLeaseRaw, &lease); err != nil {
			return NodeVPNAssignment{}, err
		}
		item.ActiveLease = &lease
	}
	return item, nil
}

func scanNodeVPNAssignmentStatus(row scanner) (NodeVPNAssignmentStatus, error) {
	var item NodeVPNAssignmentStatus
	if err := row.Scan(
		&item.ID,
		&item.VPNConnectionID,
		&item.ClusterID,
		&item.NodeID,
		&item.ObservedStatus,
		&item.StatusPayload,
		&item.ObservedAt,
	); err != nil {
		return NodeVPNAssignmentStatus{}, err
	}
	ensureRaw(&item.StatusPayload, `{}`)
	return item, nil
}

func isUniqueViolation(err error) bool {
	var pgErr *pgconn.PgError
	if errors.As(err, &pgErr) {
		return pgErr.Code == "23505"
	}
	return false
}

func getJoinRequestForUpdate(ctx context.Context, tx pgx.Tx, clusterID, joinRequestID string) (NodeJoinRequest, error) {
	row := tx.QueryRow(ctx, `
		SELECT id::text, cluster_id::text, join_token_id::text, node_name, node_fingerprint, public_key,
		       reported_capabilities, reported_facts, requested_roles, status, reviewed_by_user_id::text,
		       reviewed_at, approved_node_id::text, rejection_reason, created_at, updated_at, approval_payload, approval_signature
		FROM node_join_requests
		WHERE cluster_id = $1::uuid
		  AND id = $2::uuid
		FOR UPDATE
	`, clusterID, joinRequestID)
	return scanJoinRequest(row)
}

func ensureRaw(raw *json.RawMessage, fallback string) {
	if len(*raw) == 0 {
		*raw = json.RawMessage(fallback)
	}
}

func mergeJSONObjects(raw json.RawMessage, values map[string]any) json.RawMessage {
	out := map[string]any{}
	_ = json.Unmarshal(raw, &out)
	if out == nil {
		out = map[string]any{}
	}
	for key, value := range values {
		out[key] = value
	}
	payload, err := json.Marshal(out)
	if err != nil {
		return raw
	}
	return payload
}

func enrichVPNClientFabricRoute(item VPNClientConnection, preferredEntryNodeID, preferredExitNodeID string) json.RawMessage {
	var cfg map[string]any
	if err := json.Unmarshal(item.ClientConfig, &cfg); err != nil || cfg == nil {
		cfg = map[string]any{}
	}
	entryPool := dedupeStrings(append([]string{}, item.EntryNodeIDs...))
	placementPolicy := jsonObjectFromRaw(item.PlacementPolicy)
	entrySelector, _ := placementPolicy["entry_selector"].(string)
	clientNodeEntry := strings.EqualFold(strings.TrimSpace(entrySelector), "client_node") || placementPolicy["ipv4_ingress_node_target"] == true || placementPolicy["android_node_agent_target"] == true
	if len(entryPool) == 0 && !clientNodeEntry {
		entryPool = dedupeStrings(append([]string{}, item.AllowedNodeIDs...))
	}
	exitPool := []string{}
	if item.ExitNodeID != "" {
		exitPool = append(exitPool, item.ExitNodeID)
	}
	if item.ActiveLease != nil && item.ActiveLease.OwnerNodeID != "" {
		exitPool = append(exitPool, item.ActiveLease.OwnerNodeID)
	}
	exitPool = append(exitPool, item.AllowedNodeIDs...)
	exitPool = dedupeStrings(exitPool)

	preferredEntryNodeID = strings.TrimSpace(preferredEntryNodeID)
	selectedEntry := ""
	if !clientNodeEntry {
		selectedEntry = selectPreferredNode(entryPool, preferredEntryNodeID)
	}
	selectedExit := selectPreferredNode(exitPool, preferredExitNodeID)
	if selectedExit == "" && item.ActiveLease != nil && item.ActiveLease.OwnerNodeID != "" {
		selectedExit = item.ActiveLease.OwnerNodeID
	}
	status := "waiting_for_entry_and_exit"
	switch {
	case selectedEntry != "" && selectedExit != "":
		status = "planned"
	case clientNodeEntry && selectedExit != "":
		status = "planned"
	case selectedEntry == "":
		status = "waiting_for_entry"
	case selectedExit == "":
		status = "waiting_for_exit"
	}
	routeCandidates := vpnFabricRouteCandidates(entryPool, exitPool, selectedEntry, selectedExit)

	cfg["vpn_fabric_route"] = map[string]any{
		"schema_version":          "rap.vpn_fabric_route.v1",
		"status":                  status,
		"preferred_data_plane":    "fabric_service_channel",
		"fallback_data_plane":     "none",
		"backend_relay_fallback":  false,
		"selection_mode":          "farm_authoritative_client_node_to_exit_pool",
		"route_authority":         "fabric_farm",
		"entry_selector":          firstNonEmptyString(entrySelector, "entry-node"),
		"client_node_entry":       clientNodeEntry,
		"vpn_builds_routes":       false,
		"vpn_builds_tunnels":      false,
		"farm_builds_routes":      true,
		"farm_builds_tunnels":     true,
		"entry_pool_node_ids":     entryPool,
		"exit_pool_node_ids":      exitPool,
		"selected_entry_node_id":  selectedEntry,
		"selected_exit_node_id":   selectedExit,
		"active_lease_owner_node": selectedExit,
		"route_candidates":        routeCandidates,
		"route_candidate_count":   len(routeCandidates),
		"route_policy":            "full_tunnel_or_connection_policy",
	}
	cfg["vpn_dataplane_contract"] = map[string]any{
		"schema_version":                  "rap.vpn_packet_dataplane.v1",
		"tunnel_type":                     "universal_ip_packet",
		"application_protocol_agnostic":   true,
		"packet_forwarding_channel":       "vpn_packet",
		"control_plane_packet_relay_mode": "fabric_service_channel_only",
		"route_authority":                 "fabric_farm",
		"backend_relay_allowed":           false,
		"requires_fabric_service_channel": true,
		"vpn_builds_routes":               false,
		"vpn_builds_tunnels":              false,
		"farm_builds_routes":              true,
		"farm_builds_tunnels":             true,
		"traffic_contract": map[string]any{
			"all_ip_traffic":                      true,
			"protocol_specific_routing":           false,
			"diagnostics_only_protocol_summaries": true,
		},
		"route_selection": map[string]any{
			"mode":                   "farm_authoritative_lowest_latency_healthy_route_to_exit_pool",
			"entry_selector":         firstNonEmptyString(entrySelector, "entry-node"),
			"client_node_entry":      clientNodeEntry,
			"selected_entry_node_id": selectedEntry,
			"selected_exit_node_id":  selectedExit,
			"route_candidates":       routeCandidates,
		},
		"failover": map[string]any{
			"enabled":                    true,
			"owner":                      "fabric_farm",
			"client_topology_hidden":     true,
			"preserve_vpn_connection_id": true,
			"alternate_route_count":      alternateVPNRouteCount(routeCandidates, selectedEntry, selectedExit),
			"reroute_triggers": []string{
				"client_node_mesh_path_unhealthy",
				"exit_unhealthy",
				"mesh_route_latency_regression",
				"mesh_route_loss_regression",
				"queue_backpressure",
				"lease_owner_replaced",
			},
		},
		"backpressure": map[string]any{
			"queue_policy":       "bounded_queue_then_route_failover",
			"drop_policy":        "drop_only_when_all_routes_unavailable_or_queue_full",
			"bulk_and_realtime":  "same_packet_path",
			"flow_isolation":     "opaque_packet_hash_shards",
			"target_dataplane":   "fabric_farm_entry_to_exit_service_channel",
			"temporary_fallback": "none",
		},
	}
	out, err := json.Marshal(cfg)
	if err != nil {
		return item.ClientConfig
	}
	return out
}

func jsonObjectFromRaw(raw json.RawMessage) map[string]any {
	var out map[string]any
	if len(raw) == 0 || json.Unmarshal(raw, &out) != nil || out == nil {
		return map[string]any{}
	}
	return out
}

func vpnFabricRouteCandidates(entryPool, exitPool []string, selectedEntry, selectedExit string) []map[string]any {
	type pair struct {
		entry string
		exit  string
	}
	pairs := make([]pair, 0, len(entryPool)*len(exitPool)+1)
	if len(entryPool) == 0 && selectedExit != "" {
		pairs = append(pairs, pair{exit: selectedExit})
	}
	if len(entryPool) == 0 {
		for _, exit := range exitPool {
			if exit != "" {
				pairs = append(pairs, pair{exit: exit})
			}
		}
	}
	if selectedEntry != "" && selectedExit != "" {
		pairs = append(pairs, pair{entry: selectedEntry, exit: selectedExit})
	}
	for _, entry := range entryPool {
		for _, exit := range exitPool {
			if entry == "" || exit == "" {
				continue
			}
			pairs = append(pairs, pair{entry: entry, exit: exit})
		}
	}
	seen := map[string]struct{}{}
	out := make([]map[string]any, 0, len(pairs))
	for _, pair := range pairs {
		if pair.exit == "" {
			continue
		}
		key := pair.entry + "\x00" + pair.exit
		if _, ok := seen[key]; ok {
			continue
		}
		seen[key] = struct{}{}
		priority := len(out) + 1
		role := "alternate"
		if pair.exit == selectedExit && (pair.entry == selectedEntry || selectedEntry == "") {
			role = "preferred"
			priority = 0
		}
		candidate := map[string]any{
			"exit_node_id": pair.exit,
			"role":         role,
			"priority":     priority,
			"status":       "candidate",
			"source_role":  "ipv4-ingress",
			"route_scope":  "ipv4_ingress_to_egress_pool",
		}
		if pair.entry != "" {
			candidate["entry_node_id"] = pair.entry
		}
		out = append(out, candidate)
	}
	return out
}

func alternateVPNRouteCount(candidates []map[string]any, selectedEntry, selectedExit string) int {
	count := 0
	for _, candidate := range candidates {
		entry, _ := candidate["entry_node_id"].(string)
		exit, _ := candidate["exit_node_id"].(string)
		if entry == "" || exit == "" {
			continue
		}
		if entry == selectedEntry && exit == selectedExit {
			continue
		}
		count++
	}
	return count
}

func selectPreferredNode(pool []string, preferred string) string {
	preferred = strings.TrimSpace(preferred)
	if preferred != "" {
		for _, value := range pool {
			if value == preferred {
				return value
			}
		}
	}
	if len(pool) > 0 {
		return pool[0]
	}
	return ""
}

func dedupeStrings(values []string) []string {
	seen := make(map[string]struct{}, len(values))
	out := make([]string, 0, len(values))
	for _, value := range values {
		if value == "" {
			continue
		}
		if _, ok := seen[value]; ok {
			continue
		}
		seen[value] = struct{}{}
		out = append(out, value)
	}
	return out
}