package main

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"git.cin.su/m/Assistant/contracts/capability"
	"git.cin.su/m/Assistant/contracts/interaction"
	interactiondomain "git.cin.su/m/Assistant/modules/interaction/domain"
)

func TestBearerTokenRequiresBearerScheme(t *testing.T) {
	request := httptest.NewRequest("GET", "/", nil)
	request.Header.Set("Authorization", "Basic value")
	if token := bearerToken(request); token != "" {
		t.Fatalf("unexpected token %q", token)
	}
	request.Header.Set("Authorization", "Bearer creator-session")
	if token := bearerToken(request); token != "creator-session" {
		t.Fatalf("token = %q", token)
	}
}

func TestCognitiveChannelQuestionUsesHumanSafeHealthReply(t *testing.T) {
	reply := humanCognitiveChannelReply(interaction.InformationRequestCognitiveChannelStatus, interaction.SpeechActQuestion, capability.Health{State: capability.HealthAvailable, CapabilityID: "provider-secret-model"}, nil)
	if !strings.Contains(reply, "доступен") || strings.Contains(reply, "provider-secret-model") {
		t.Fatalf("unexpected safe reply: %q", reply)
	}
}

func TestCognitiveConfigurationRequestDoesNotPretendToMutate(t *testing.T) {
	reply := humanCognitiveChannelReply(interaction.InformationRequestCognitiveRecovery, interaction.SpeechActDirective, capability.Health{State: capability.HealthUnavailable}, nil)
	if !strings.Contains(reply, "Домовой жив") || !strings.Contains(reply, "аварийн") {
		t.Fatalf("unexpected configuration reply: %q", reply)
	}
}

func TestCognitiveDegradedReplyKeepsDomovoyAlive(t *testing.T) {
	reply := humanCognitiveDegradedReply("Помоги настроить локальную модель")
	if !strings.Contains(reply, "Домовой жив") || !strings.Contains(reply, "принято") {
		t.Fatalf("unexpected degraded reply: %q", reply)
	}
}

func TestModelInventoryQuestionUsesReadOnlyFastPath(t *testing.T) {
	for _, message := range []string{"какие модели доступны?", "напиши список настроек ИИ", "какие есть подключения ИИ"} {
		result, err := interactiondomain.InterpretUtterance(interaction.HumanUtterance{Content: message}, nil, nil, time.Now())
		if err != nil {
			t.Fatalf("interpretation failed for %q: %v", message, err)
		}
		if result.InformationRequestKind != interaction.InformationRequestCognitiveModelInventory {
			t.Fatalf("semantic inventory request %q was not recognized: kind=%q act=%q hints=%v", message, result.InformationRequestKind, result.Interpretation.SpeechAct, result.CapabilityHints)
		}
	}
	ordinary, err := interactiondomain.InterpretUtterance(interaction.HumanUtterance{Content: "настрой локальную модель"}, nil, nil, time.Now())
	if err != nil {
		t.Fatal(err)
	}
	if ordinary.InformationRequestKind == interaction.InformationRequestCognitiveModelInventory {
		t.Fatal("configuration mutation must not use read-only model inventory path")
	}
}

func TestHumanCognitiveModelInventoryDoesNotExposeSecrets(t *testing.T) {
	cost := int64(25)
	text := humanCognitiveModelInventory([]capability.ResolvedCognitiveBinding{{
		Binding:  capability.CognitiveBinding{DataPolicy: capability.DataPolicyExternalMessageOnly, Activation: capability.ActivationActive},
		Provider: capability.ProviderInstance{Kind: "openai-compatible-chat-v1", CredentialRef: "secret-ref", AuthMode: capability.AuthKey, BillingMode: capability.BillingPerRequest, RequestCostMicros: &cost, Health: capability.HealthAvailable},
		Model:    capability.ModelDescriptor{ProviderModelID: "example-model", Health: capability.HealthAvailable},
	}}, nil)
	if strings.Contains(text, "secret-ref") || strings.Contains(text, "25") || !strings.Contains(text, "example-model") || !strings.Contains(text, "API-ключ") {
		t.Fatalf("unsafe or incomplete inventory: %q", text)
	}
}

func TestCreatorSessionHandlerAcceptsConfiguredCredentials(t *testing.T) {
	handler := creatorSessionHandler("recovery", "m", "password", []byte("01234567890123456789012345678901"), func() time.Time { return time.Unix(1000, 0) })
	request := httptest.NewRequest(http.MethodPost, "/v1/creator/sessions", strings.NewReader(`{"username":"m","password":"password"}`))
	response := httptest.NewRecorder()
	handler(response, request)
	if response.Code != http.StatusOK {
		t.Fatalf("status = %d body=%s", response.Code, response.Body.String())
	}
	var issued struct {
		Token string
	}
	if err := json.NewDecoder(response.Body).Decode(&issued); err != nil || issued.Token == "" {
		t.Fatalf("session response = %+v, err=%v", issued, err)
	}
}

func TestCreatorSessionHandlerFailsClosed(t *testing.T) {
	handler := creatorSessionHandler("recovery", "m", "password", []byte("01234567890123456789012345678901"), time.Now)
	tests := []string{
		`{"username":"wrong","password":"password"}`,
		`{"username":"m","password":"wrong"}`,
		`{"username":"","password":""}`,
		`{"username":"m","password":"password","actor":"attacker"}`,
		`{`,
		`{"username":"m","password":"password"}{}`,
	}
	for _, body := range tests {
		request := httptest.NewRequest(http.MethodPost, "/v1/creator/sessions", strings.NewReader(body))
		response := httptest.NewRecorder()
		handler(response, request)
		if response.Code != http.StatusUnauthorized || strings.TrimSpace(response.Body.String()) != "creator authentication denied" {
			t.Fatalf("body %q: status=%d response=%q", body, response.Code, response.Body.String())
		}
	}
}

func TestCreatorSessionHandlerPreservesBootstrapRecovery(t *testing.T) {
	handler := creatorSessionHandler("recovery", "", "", []byte("01234567890123456789012345678901"), time.Now)
	request := httptest.NewRequest(http.MethodPost, "/v1/creator/sessions", nil)
	request.Header.Set("Authorization", "Bearer recovery")
	response := httptest.NewRecorder()
	handler(response, request)
	if response.Code != http.StatusOK {
		t.Fatalf("bootstrap recovery status = %d", response.Code)
	}
}

func TestReadRequiredSecretFromEnvironment(t *testing.T) {
	t.Setenv("TEST_CREATOR_SECRET", "direct-value")
	value, err := readRequiredSecret("TEST_CREATOR_SECRET")
	if err != nil || value != "direct-value" {
		t.Fatalf("value=%q err=%v", value, err)
	}
}

func TestReadRequiredSecretFromFile(t *testing.T) {
	fileName := filepath.Join(t.TempDir(), "secret")
	if err := os.WriteFile(fileName, []byte("file-value\r\n"), 0o600); err != nil {
		t.Fatal(err)
	}
	t.Setenv("TEST_CREATOR_SECRET_FILE", fileName)
	value, err := readRequiredSecret("TEST_CREATOR_SECRET")
	if err != nil || value != "file-value" {
		t.Fatalf("value=%q err=%v", value, err)
	}
}

func TestReadRequiredSecretFailsClosed(t *testing.T) {
	t.Run("both sources", func(t *testing.T) {
		t.Setenv("TEST_CREATOR_SECRET", "direct")
		t.Setenv("TEST_CREATOR_SECRET_FILE", filepath.Join(t.TempDir(), "secret"))
		if _, err := readRequiredSecret("TEST_CREATOR_SECRET"); err == nil {
			t.Fatal("expected ambiguous configuration to fail")
		}
	})
	t.Run("empty file", func(t *testing.T) {
		fileName := filepath.Join(t.TempDir(), "secret")
		if err := os.WriteFile(fileName, nil, 0o600); err != nil {
			t.Fatal(err)
		}
		t.Setenv("TEST_CREATOR_SECRET_FILE", fileName)
		if _, err := readRequiredSecret("TEST_CREATOR_SECRET"); err == nil {
			t.Fatal("expected empty secret to fail")
		}
	})
	t.Run("multiline file", func(t *testing.T) {
		fileName := filepath.Join(t.TempDir(), "secret")
		if err := os.WriteFile(fileName, []byte("first\nsecond\n"), 0o600); err != nil {
			t.Fatal(err)
		}
		t.Setenv("TEST_CREATOR_SECRET_FILE", fileName)
		if _, err := readRequiredSecret("TEST_CREATOR_SECRET"); err == nil {
			t.Fatal("expected multiline secret to fail")
		}
	})
	t.Run("missing file", func(t *testing.T) {
		t.Setenv("TEST_CREATOR_SECRET_FILE", filepath.Join(t.TempDir(), "missing"))
		if _, err := readRequiredSecret("TEST_CREATOR_SECRET"); err == nil {
			t.Fatal("expected missing secret file to fail")
		}
	})
}