package cluster

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"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:"

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 (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
		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, 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
		ORDER BY n.created_at DESC
	`, clusterID)
	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) 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) 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) GetJoinRequestForBootstrap(ctx context.Context, input GetJoinRequestBootstrapInput) (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"
	}

	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 _, 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,
		Bootstrap: NodeBootstrap{
			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) 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, 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, input.NodeID)
	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, 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, input.NodeID)
	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) 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) 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, link_status, latency_ms, quality_score, metadata, observed_at
		FROM mesh_latest_links
		WHERE cluster_id = $1::uuid
		ORDER BY observed_at DESC
	`, clusterID)
	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, $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) 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 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
		FROM vpn_connections
		WHERE cluster_id = $1::uuid
		ORDER BY 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 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
		FROM vpn_connections
		WHERE cluster_id = $1::uuid
		  AND 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) 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')
		             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')
			             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, clusterID string, limit int) ([]ClusterAuditEvent, error) {
	if limit <= 0 || limit > 200 {
		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
		ORDER BY created_at DESC
		LIMIT $2
	`, clusterID, 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()
}

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,
	); err != nil {
		return ClusterAuthorityKey{}, err
	}
	item.SchemaVersion = clusterauth.AuthoritySchemaVersion
	return item, nil
}

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 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 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 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 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)
	}
}