package queryapi_test

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"testing"
	"time"

	queryapi "queryorchestration/api/queryAPI"
	"queryorchestration/internal/cognitoauth"
	"queryorchestration/internal/eula"
	"queryorchestration/internal/test"

	"github.com/google/uuid"
	"github.com/labstack/echo/v4"
	"github.com/oapi-codegen/nullable"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// ptrTime is a helper to create a pointer to a time.Time value.
func ptrTime(t time.Time) *time.Time {
	return &t
}

// setupEulaTestContext creates an echo context with the specified path and method.
func setupEulaTestContext(method, path string, body interface{}) (echo.Context, *httptest.ResponseRecorder) {
	e := echo.New()
	var req *http.Request

	if body != nil {
		jsonBody, _ := json.Marshal(body)
		req = httptest.NewRequest(method, path, bytes.NewReader(jsonBody))
		req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	} else {
		req = httptest.NewRequest(method, path, nil)
	}

	rec := httptest.NewRecorder()
	ctx := e.NewContext(req, rec)
	return ctx, rec
}

// setupEulaTestContextWithUser creates an echo context with user info set.
func setupEulaTestContextWithUser(method, path string, body interface{}, userSubject, userEmail string) (echo.Context, *httptest.ResponseRecorder) {
	ctx, rec := setupEulaTestContext(method, path, body)

	// Set up user info in context (simulating authenticated user)
	// Note: GetUserSubject expects map[string]interface{} with "sub" key
	// Note: GetUserInfo expects cognitoauth.UserInfo (not pointer)
	ctx.Set("user_claims", map[string]interface{}{
		"sub":   userSubject,
		"email": userEmail,
	})
	ctx.Set("user_info", cognitoauth.UserInfo{
		Email: userEmail,
	})

	return ctx, rec
}

// createTestEulaVersion creates a test EULA version in the database.
func createTestEulaVersion(t *testing.T, svc *eula.Service, version, title string, activate bool) *uuid.UUID {
	ctx := t.Context()

	input := &eula.CreateVersionInput{
		Version:       version,
		Title:         title,
		Content:       "# Test EULA\n\nThis is test content.",
		EffectiveDate: ptrTime(time.Now()),
		CreatedBy:     "admin@test.com",
	}

	created, err := svc.CreateVersion(ctx, input)
	require.NoError(t, err)

	if activate {
		_, err = svc.ActivateVersion(ctx, created.ID, "admin@test.com")
		require.NoError(t, err)
	}

	return &created.ID
}

func TestGetCurrentEula(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	t.Run("returns current EULA version", func(t *testing.T) {
		// Create and activate a version
		versionStr := "1.0.0-test-" + uuid.New().String()[:8]
		createTestEulaVersion(t, svc.Eula, versionStr, "Test EULA", true)

		ctx, rec := setupEulaTestContext(http.MethodGet, "/eula", nil)

		err := cons.GetCurrentEula(ctx)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaPublicResponse
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.Equal(t, versionStr, response.Version)
	})

	t.Run("returns 404 when no current version", func(t *testing.T) {
		// Create a new config without any EULA versions activated
		cfg2 := &ControllerConfig{}
		test.CreateDB(t, cfg2)
		initializeTestConfig(t, cfg2)

		svc2 := createControllerServices(cfg2)
		cons2 := queryapi.NewControllers(svc2, cfg2)

		ctx, rec := setupEulaTestContext(http.MethodGet, "/eula", nil)

		err := cons2.GetCurrentEula(ctx)
		require.NoError(t, err)
		assert.Equal(t, http.StatusNotFound, rec.Code)
	})
}

func TestGetEulaStatus(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	// Create and activate a version
	versionStr := "status-test-" + uuid.New().String()[:8]
	versionID := createTestEulaVersion(t, svc.Eula, versionStr, "Status Test EULA", true)

	t.Run("returns status for unagreed user", func(t *testing.T) {
		userSubject := "user-" + uuid.New().String()[:8]
		ctx, rec := setupEulaTestContextWithUser(http.MethodGet, "/eula/status", nil, userSubject, "user@test.com")

		err := cons.GetEulaStatus(ctx)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaStatusResponse
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.False(t, response.HasAgreed)
		assert.Equal(t, versionStr, response.CurrentVersion)
	})

	t.Run("returns status for agreed user", func(t *testing.T) {
		userSubject := "agreed-user-" + uuid.New().String()[:8]
		userEmail := "agreed@test.com"

		// Record agreement
		_, err := svc.Eula.RecordAgreement(t.Context(), &eula.RecordAgreementInput{
			CognitoSubjectID: userSubject,
			UserEmail:        userEmail,
			EulaVersionID:    *versionID,
			IPAddress:        "192.168.1.1",
		})
		require.NoError(t, err)

		ctx, rec := setupEulaTestContextWithUser(http.MethodGet, "/eula/status", nil, userSubject, userEmail)

		err = cons.GetEulaStatus(ctx)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaStatusResponse
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.True(t, response.HasAgreed)
	})

	t.Run("returns 401 for unauthenticated user", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodGet, "/eula/status", nil)
		// Don't set user info

		err := cons.GetEulaStatus(ctx)
		require.NoError(t, err)
		assert.Equal(t, http.StatusUnauthorized, rec.Code)
	})
}

func TestAgreeToEula(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	// Create and activate a version
	versionStr := "agree-test-" + uuid.New().String()[:8]
	createTestEulaVersion(t, svc.Eula, versionStr, "Agree Test EULA", true)

	t.Run("records new agreement", func(t *testing.T) {
		userSubject := "agree-user-" + uuid.New().String()[:8]
		userEmail := "agreeuser@test.com"
		ctx, rec := setupEulaTestContextWithUser(http.MethodPost, "/eula/agree", nil, userSubject, userEmail)
		ctx.Request().RemoteAddr = "192.168.1.100:12345"

		err := cons.AgreeToEula(ctx)
		require.NoError(t, err)
		assert.Equal(t, http.StatusCreated, rec.Code)

		var response queryapi.EulaAgreementResponse
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.Equal(t, versionStr, response.EulaVersion)
	})

	t.Run("idempotent - returns 200 for existing agreement", func(t *testing.T) {
		userSubject := "idempotent-user-" + uuid.New().String()[:8]
		userEmail := "idempotent@test.com"

		// First call
		ctx1, rec1 := setupEulaTestContextWithUser(http.MethodPost, "/eula/agree", nil, userSubject, userEmail)
		ctx1.Request().RemoteAddr = "192.168.1.100:12345"
		err := cons.AgreeToEula(ctx1)
		require.NoError(t, err)
		assert.Equal(t, http.StatusCreated, rec1.Code)

		// Second call (same user)
		ctx2, rec2 := setupEulaTestContextWithUser(http.MethodPost, "/eula/agree", nil, userSubject, userEmail)
		ctx2.Request().RemoteAddr = "192.168.1.100:12345"
		err = cons.AgreeToEula(ctx2)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec2.Code)
	})

	t.Run("returns 401 for unauthenticated user", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodPost, "/eula/agree", nil)

		err := cons.AgreeToEula(ctx)
		require.NoError(t, err)
		assert.Equal(t, http.StatusUnauthorized, rec.Code)
	})
}

func TestListEulaVersions(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	// Create multiple versions
	for i := 0; i < 5; i++ {
		createTestEulaVersion(t, svc.Eula, "list-v"+uuid.New().String()[:8], "List EULA", false)
	}

	t.Run("lists all versions with pagination", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula?page=1&page_size=3", nil)

		page := int32(1)
		pageSize := int32(3)
		params := queryapi.ListEulaVersionsParams{
			Page:     &page,
			PageSize: &pageSize,
		}

		err := cons.ListEulaVersions(ctx, params)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaVersionList
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.LessOrEqual(t, len(response.Versions), 3)
		assert.GreaterOrEqual(t, response.Total, int32(5))
	})
}

func TestCreateEulaVersion(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	t.Run("creates new EULA version", func(t *testing.T) {
		versionStr := "create-test-" + uuid.New().String()[:8]
		body := queryapi.EulaVersionCreate{
			Version:       versionStr,
			Title:         "Created EULA",
			Content:       "# Created EULA Content\n\nTest content here.",
			EffectiveDate: nullable.NewNullableWithValue(time.Now().Add(24 * time.Hour)),
		}

		ctx, rec := setupEulaTestContextWithUser(http.MethodPost, "/admin/eula", body, "admin-subject", "admin@test.com")

		err := cons.CreateEulaVersion(ctx)
		require.NoError(t, err)
		assert.Equal(t, http.StatusCreated, rec.Code)

		var response queryapi.EulaVersion
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.Equal(t, versionStr, response.Version)
		assert.Equal(t, "Created EULA", response.Title)
	})

	t.Run("returns 409 for duplicate version", func(t *testing.T) {
		versionStr := "dup-test-" + uuid.New().String()[:8]
		body := queryapi.EulaVersionCreate{
			Version:       versionStr,
			Title:         "First EULA",
			Content:       "Content",
			EffectiveDate: nullable.NewNullableWithValue(time.Now()),
		}

		// First creation
		ctx1, _ := setupEulaTestContextWithUser(http.MethodPost, "/admin/eula", body, "admin-subject", "admin@test.com")
		err := cons.CreateEulaVersion(ctx1)
		require.NoError(t, err)

		// Second creation (same version)
		ctx2, rec2 := setupEulaTestContextWithUser(http.MethodPost, "/admin/eula", body, "admin-subject", "admin@test.com")
		err = cons.CreateEulaVersion(ctx2)
		require.NoError(t, err)
		assert.Equal(t, http.StatusConflict, rec2.Code)
	})
}

func TestGetEulaVersion(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	t.Run("gets existing version by ID", func(t *testing.T) {
		versionStr := "get-test-" + uuid.New().String()[:8]
		versionID := createTestEulaVersion(t, svc.Eula, versionStr, "Get Test EULA", false)

		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula/"+versionID.String(), nil)

		err := cons.GetEulaVersion(ctx, *versionID)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaVersion
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.Equal(t, versionStr, response.Version)
	})

	t.Run("returns 404 for non-existent version", func(t *testing.T) {
		nonExistentID := uuid.New()
		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula/"+nonExistentID.String(), nil)

		err := cons.GetEulaVersion(ctx, nonExistentID)
		require.NoError(t, err)
		assert.Equal(t, http.StatusNotFound, rec.Code)
	})
}

func TestUpdateEulaVersion(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	t.Run("updates version title", func(t *testing.T) {
		versionStr := "update-test-" + uuid.New().String()[:8]
		versionID := createTestEulaVersion(t, svc.Eula, versionStr, "Original Title", false)

		newTitle := "Updated Title"
		body := queryapi.EulaVersionUpdate{
			Title: &newTitle,
		}

		ctx, rec := setupEulaTestContext(http.MethodPatch, "/admin/eula/"+versionID.String(), body)

		err := cons.UpdateEulaVersion(ctx, *versionID)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaVersion
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.Equal(t, newTitle, response.Title)
	})
}

func TestActivateEulaVersion(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	t.Run("activates version", func(t *testing.T) {
		versionStr := "activate-test-" + uuid.New().String()[:8]
		versionID := createTestEulaVersion(t, svc.Eula, versionStr, "Activate Test EULA", false)

		ctx, rec := setupEulaTestContextWithUser(http.MethodPost, "/admin/eula/"+versionID.String()+"/activate", nil, "admin-subject", "admin@test.com")

		err := cons.ActivateEulaVersion(ctx, *versionID)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaVersion
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.True(t, response.IsCurrent)
	})

	t.Run("returns 404 for non-existent version", func(t *testing.T) {
		nonExistentID := uuid.New()
		ctx, rec := setupEulaTestContextWithUser(http.MethodPost, "/admin/eula/"+nonExistentID.String()+"/activate", nil, "admin-subject", "admin@test.com")

		err := cons.ActivateEulaVersion(ctx, nonExistentID)
		require.NoError(t, err)
		assert.Equal(t, http.StatusNotFound, rec.Code)
	})
}

func TestListEulaAgreements(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	// Create version and some agreements
	versionID := createTestEulaVersion(t, svc.Eula, "agreements-test-"+uuid.New().String()[:8], "Agreements Test", true)

	for i := 0; i < 3; i++ {
		_, err := svc.Eula.RecordAgreement(t.Context(), &eula.RecordAgreementInput{
			CognitoSubjectID: "user-" + uuid.New().String()[:8],
			UserEmail:        "user" + uuid.New().String()[:4] + "@test.com",
			EulaVersionID:    *versionID,
			IPAddress:        "192.168.1.1",
		})
		require.NoError(t, err)
	}

	t.Run("lists agreements", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula/agreements", nil)

		page := int32(1)
		pageSize := int32(10)
		params := queryapi.ListEulaAgreementsParams{
			Page:     &page,
			PageSize: &pageSize,
		}

		err := cons.ListEulaAgreements(ctx, params)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaAgreementList
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)
		assert.GreaterOrEqual(t, len(response.Agreements), 3)
	})
}

func TestGetEulaCompliance(t *testing.T) {
	// This test requires real Cognito access - opt-in via env var
	if os.Getenv("ENABLE_COGNITO_INTEGRATION_TESTS") != "true" {
		t.Skip("Skipping Cognito integration test: set ENABLE_COGNITO_INTEGRATION_TESTS=true to run")
	}

	userPoolID := os.Getenv("COGNITO_USER_POOL_ID")
	awsRegion := os.Getenv("AWS_REGION")
	if awsRegion == "" {
		awsRegion = os.Getenv("AUTH_REGION")
	}

	if userPoolID == "" || awsRegion == "" {
		t.Skip("Skipping compliance handler test: COGNITO_USER_POOL_ID and AWS_REGION/AUTH_REGION must be set")
	}

	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	// Create and activate a version for testing
	versionStr := "compliance-handler-" + uuid.New().String()[:8]
	createTestEulaVersion(t, svc.Eula, versionStr, "Compliance Handler Test EULA", true)

	t.Run("returns_compliance_report", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula/compliance", nil)

		params := queryapi.GetEulaComplianceParams{}
		err := cons.GetEulaCompliance(ctx, params)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaComplianceReport
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)

		// Verify structure
		assert.NotEmpty(t, response.EulaVersion.Id)
		assert.NotEmpty(t, response.EulaVersion.Version)
		assert.GreaterOrEqual(t, response.Summary.TotalUsers, int32(0))
		assert.Equal(t, response.Summary.TotalUsers, response.Summary.AgreedCount+response.Summary.NotAgreedCount)
	})

	t.Run("returns_404_for_nonexistent_version", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula/compliance?version_id=00000000-0000-0000-0000-000000000000", nil)

		nonExistentID := uuid.MustParse("00000000-0000-0000-0000-000000000000")
		params := queryapi.GetEulaComplianceParams{
			VersionId: (*queryapi.EulaVersionID)(&nonExistentID),
		}
		err := cons.GetEulaCompliance(ctx, params)
		require.NoError(t, err)
		assert.Equal(t, http.StatusNotFound, rec.Code)
	})

	t.Run("filters_by_agreed_status", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula/compliance?agreed=false", nil)

		agreed := false
		params := queryapi.GetEulaComplianceParams{
			Agreed: &agreed,
		}
		err := cons.GetEulaCompliance(ctx, params)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaComplianceReport
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)

		// All users in the result should have agreed=false
		for _, user := range response.Users {
			assert.False(t, user.Agreed)
		}
	})

	t.Run("pagination_params_work", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula/compliance?page=1&page_size=5", nil)

		page := int32(1)
		pageSize := int32(5)
		params := queryapi.GetEulaComplianceParams{
			Page:     &page,
			PageSize: &pageSize,
		}
		err := cons.GetEulaCompliance(ctx, params)
		require.NoError(t, err)
		assert.Equal(t, http.StatusOK, rec.Code)

		var response queryapi.EulaComplianceReport
		err = json.Unmarshal(rec.Body.Bytes(), &response)
		require.NoError(t, err)

		assert.Equal(t, int32(1), response.Pagination.Page)
		assert.Equal(t, int32(5), response.Pagination.PageSize)
		assert.LessOrEqual(t, len(response.Users), 5)
	})
}

func TestGetEulaComplianceNoCurrentVersion(t *testing.T) {
	// This test requires real Cognito access - opt-in via env var
	if os.Getenv("ENABLE_COGNITO_INTEGRATION_TESTS") != "true" {
		t.Skip("Skipping Cognito integration test: set ENABLE_COGNITO_INTEGRATION_TESTS=true to run")
	}

	userPoolID := os.Getenv("COGNITO_USER_POOL_ID")
	awsRegion := os.Getenv("AWS_REGION")
	if awsRegion == "" {
		awsRegion = os.Getenv("AUTH_REGION")
	}

	if userPoolID == "" || awsRegion == "" {
		t.Skip("Skipping compliance handler test: COGNITO_USER_POOL_ID and AWS_REGION/AUTH_REGION must be set")
	}

	// Fresh database with no EULA versions
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	t.Run("returns_404_no_current_eula", func(t *testing.T) {
		ctx, rec := setupEulaTestContext(http.MethodGet, "/admin/eula/compliance", nil)

		params := queryapi.GetEulaComplianceParams{}
		err := cons.GetEulaCompliance(ctx, params)
		require.NoError(t, err)
		assert.Equal(t, http.StatusNotFound, rec.Code)
	})
}