package testutil

import (
	"context"
	"log"
	"os"
	"path/filepath"
	"time"

	"github.com/stretchr/testify/suite"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"

	graph "tercul/internal/adapters/graphql"
	"tercul/internal/app/auth"
	auth_platform "tercul/internal/platform/auth"
	"tercul/internal/app/localization"
	"tercul/internal/app/work"
	"tercul/internal/data/sql"
	"tercul/internal/domain"
)

// IntegrationTestSuite provides a comprehensive test environment with either in-memory SQLite or mock repositories
type IntegrationTestSuite struct {
	suite.Suite
	DB              *gorm.DB
	WorkRepo        domain.WorkRepository
	UserRepo        domain.UserRepository
	AuthorRepo      domain.AuthorRepository
	TranslationRepo domain.TranslationRepository
	CommentRepo     domain.CommentRepository
	LikeRepo        domain.LikeRepository
	BookmarkRepo    domain.BookmarkRepository
	CollectionRepo  domain.CollectionRepository
	TagRepo         domain.TagRepository
	CategoryRepo    domain.CategoryRepository

	// Services
	WorkCommands   *work.WorkCommands
	WorkQueries    *work.WorkQueries
	Localization   localization.Service
	AuthCommands   *auth.AuthCommands
	AuthQueries    *auth.AuthQueries

	// Test data
	TestWorks        []*domain.Work
	TestUsers        []*domain.User
	TestAuthors      []*domain.Author
	TestTranslations []*domain.Translation
}

// TestConfig holds configuration for the test environment
type TestConfig struct {
	UseInMemoryDB bool   // If true, use SQLite in-memory, otherwise use mock repositories
	DBPath        string // Path for SQLite file (only used if UseInMemoryDB is false)
	LogLevel      logger.LogLevel
}

// DefaultTestConfig returns a default test configuration
func DefaultTestConfig() *TestConfig {
	return &TestConfig{
		UseInMemoryDB: true,
		DBPath:        "",
		LogLevel:      logger.Silent,
	}
}

// SetupSuite sets up the test suite with the specified configuration
func (s *IntegrationTestSuite) SetupSuite(config *TestConfig) {
	if config == nil {
		config = DefaultTestConfig()
	}

	if config.UseInMemoryDB {
		s.setupInMemoryDB(config)
	} else {
		s.setupMockRepositories()
	}
	
	s.setupServices()
	s.setupTestData()
}

// setupInMemoryDB sets up an in-memory SQLite database for testing
func (s *IntegrationTestSuite) setupInMemoryDB(config *TestConfig) {
	var dbPath string
	if config.DBPath != "" {
		// Ensure directory exists
		dir := filepath.Dir(config.DBPath)
		if err := os.MkdirAll(dir, 0755); err != nil {
			s.T().Fatalf("Failed to create database directory: %v", err)
		}
		dbPath = config.DBPath
	} else {
		// Use in-memory database
		dbPath = ":memory:"
	}

	// Custom logger for tests
	newLogger := logger.New(
		log.New(os.Stdout, "\r\n", log.LstdFlags),
		logger.Config{
			SlowThreshold:             time.Second,
			LogLevel:                  config.LogLevel,
			IgnoreRecordNotFoundError: true,
			Colorful:                  false,
		},
	)

	db, err := gorm.Open(sqlite.Open(dbPath), &gorm.Config{
		Logger: newLogger,
	})
	if err != nil {
		s.T().Fatalf("Failed to connect to test database: %v", err)
	}

	s.DB = db

	// Run migrations
	if err := db.AutoMigrate(
		&domain.Work{},
		&domain.User{},
		&domain.Author{},
		&domain.Translation{},
		&domain.Comment{},
		&domain.Like{},
		&domain.Bookmark{},
		&domain.Collection{},
		&domain.Tag{},
		&domain.Category{},
		&domain.Country{},
		&domain.City{},
		&domain.Place{},
		&domain.Address{},
		&domain.Copyright{},
		&domain.CopyrightClaim{},
		&domain.Monetization{},
		&domain.Book{},
		&domain.Publisher{},
		&domain.Source{},
		// &domain.WorkAnalytics{}, // Commented out as it's not in models package
		&domain.ReadabilityScore{},
		&domain.WritingStyle{},
		&domain.Emotion{},
		&domain.TopicCluster{},
		&domain.Mood{},
		&domain.Concept{},
		&domain.LinguisticLayer{},
		&domain.WorkStats{},
		&domain.TextMetadata{},
		&domain.PoeticAnalysis{},
		&domain.TranslationField{},
	); err != nil {
		s.T().Fatalf("Failed to run migrations: %v", err)
	}

	// Create repository instances
	s.WorkRepo = sql.NewWorkRepository(db)
	s.UserRepo = sql.NewUserRepository(db)
	s.AuthorRepo = sql.NewAuthorRepository(db)
	s.TranslationRepo = sql.NewTranslationRepository(db)
	s.CommentRepo = sql.NewCommentRepository(db)
	s.LikeRepo = sql.NewLikeRepository(db)
	s.BookmarkRepo = sql.NewBookmarkRepository(db)
	s.CollectionRepo = sql.NewCollectionRepository(db)
	s.TagRepo = sql.NewTagRepository(db)
	s.CategoryRepo = sql.NewCategoryRepository(db)
}

// setupMockRepositories sets up mock repositories for testing
func (s *IntegrationTestSuite) setupMockRepositories() {
	s.WorkRepo = NewUnifiedMockWorkRepository()
	// Temporarily comment out problematic repositories until we fix the interface implementations
	// s.UserRepo = NewMockUserRepository()
	// s.AuthorRepo = NewMockAuthorRepository()
	// s.TranslationRepo = NewMockTranslationRepository()
	// s.CommentRepo = NewMockCommentRepository()
	// s.LikeRepo = NewMockLikeRepository()
	// s.BookmarkRepo = NewMockBookmarkRepository()
	// s.CollectionRepo = NewMockCollectionRepository()
	// s.TagRepo = NewMockTagRepository()
	// s.CategoryRepo = NewMockCategoryRepository()
}

// setupServices sets up service instances
func (s *IntegrationTestSuite) setupServices() {
	mockAnalyzer := &MockAnalyzer{}
	s.WorkCommands = work.NewWorkCommands(s.WorkRepo, mockAnalyzer)
	s.WorkQueries = work.NewWorkQueries(s.WorkRepo)
	s.Localization = localization.NewService(s.TranslationRepo)
	jwtManager := auth_platform.NewJWTManager()
	s.AuthCommands = auth.NewAuthCommands(s.UserRepo, jwtManager)
	s.AuthQueries = auth.NewAuthQueries(s.UserRepo, jwtManager)
}

// setupTestData creates initial test data
func (s *IntegrationTestSuite) setupTestData() {
	// Create test users
	s.TestUsers = []*domain.User{
		{Username: "testuser1", Email: "test1@example.com", FirstName: "Test", LastName: "User1"},
		{Username: "testuser2", Email: "test2@example.com", FirstName: "Test", LastName: "User2"},
	}

	for _, user := range s.TestUsers {
		if err := s.UserRepo.Create(context.Background(), user); err != nil {
			s.T().Logf("Warning: Failed to create test user: %v", err)
		}
	}

	// Create test authors
	s.TestAuthors = []*domain.Author{
		{Name: "Test Author 1", TranslatableModel: domain.TranslatableModel{Language: "en"}},
		{Name: "Test Author 2", TranslatableModel: domain.TranslatableModel{Language: "fr"}},
	}

	for _, author := range s.TestAuthors {
		if err := s.AuthorRepo.Create(context.Background(), author); err != nil {
			s.T().Logf("Warning: Failed to create test author: %v", err)
		}
	}

	// Create test works
	s.TestWorks = []*domain.Work{
		{Title: "Test Work 1", TranslatableModel: domain.TranslatableModel{Language: "en"}},
		{Title: "Test Work 2", TranslatableModel: domain.TranslatableModel{Language: "en"}},
		{Title: "Test Work 3", TranslatableModel: domain.TranslatableModel{Language: "fr"}},
	}

	for _, work := range s.TestWorks {
		if err := s.WorkRepo.Create(context.Background(), work); err != nil {
			s.T().Logf("Warning: Failed to create test work: %v", err)
		}
	}

	// Create test translations
	s.TestTranslations = []*domain.Translation{
		{
			Title:             "Test Work 1",
			Content:           "Test content for work 1",
			Language:          "en",
			TranslatableID:    s.TestWorks[0].ID,
			TranslatableType:  "Work",
			IsOriginalLanguage: true,
		},
		{
			Title:             "Test Work 2",
			Content:           "Test content for work 2",
			Language:          "en",
			TranslatableID:    s.TestWorks[1].ID,
			TranslatableType:  "Work",
			IsOriginalLanguage: true,
		},
		{
			Title:             "Test Work 3",
			Content:           "Test content for work 3",
			Language:          "fr",
			TranslatableID:    s.TestWorks[2].ID,
			TranslatableType:  "Work",
			IsOriginalLanguage: true,
		},
	}

	for _, translation := range s.TestTranslations {
		if err := s.TranslationRepo.Create(context.Background(), translation); err != nil {
			s.T().Logf("Warning: Failed to create test translation: %v", err)
		}
	}
}

// TearDownSuite cleans up the test suite
func (s *IntegrationTestSuite) TearDownSuite() {
	if s.DB != nil {
		sqlDB, err := s.DB.DB()
		if err == nil {
			sqlDB.Close()
		}
	}
}

// SetupTest resets test data for each test
func (s *IntegrationTestSuite) SetupTest() {
	if s.DB != nil {
		// Reset database for each test
		s.DB.Exec("DELETE FROM translations")
		s.DB.Exec("DELETE FROM works")
		s.DB.Exec("DELETE FROM authors")
		s.DB.Exec("DELETE FROM users")
		s.setupTestData()
	} else {
		// Reset mock repositories
		if mockRepo, ok := s.WorkRepo.(*UnifiedMockWorkRepository); ok {
			mockRepo.Reset()
		}
		// Add similar reset logic for other mock repositories
	}
}

// GetResolver returns a properly configured GraphQL resolver for testing
func (s *IntegrationTestSuite) GetResolver() *graph.Resolver {
	return &graph.Resolver{
	// This needs to be updated to reflect the new resolver structure
	}
}

// CreateTestWork creates a test work with optional content
func (s *IntegrationTestSuite) CreateTestWork(title, language string, content string) *domain.Work {
	work := &domain.Work{
		Title:             title,
		TranslatableModel: domain.TranslatableModel{Language: language},
	}

	if err := s.WorkRepo.Create(context.Background(), work); err != nil {
		s.T().Fatalf("Failed to create test work: %v", err)
	}

	if content != "" {
		translation := &domain.Translation{
			Title:             title,
			Content:           content,
			Language:          language,
			TranslatableID:    work.ID,
			TranslatableType:  "Work",
			IsOriginalLanguage: true,
		}

		if err := s.TranslationRepo.Create(context.Background(), translation); err != nil {
			s.T().Logf("Warning: Failed to create test translation: %v", err)
		}
	}

	return work
}

// CleanupTestData removes all test data
func (s *IntegrationTestSuite) CleanupTestData() {
	if s.DB != nil {
		s.DB.Exec("DELETE FROM translations")
		s.DB.Exec("DELETE FROM works")
		s.DB.Exec("DELETE FROM authors")
		s.DB.Exec("DELETE FROM users")
	}
}