package testutil

import (
	"context"
	"log"
	"os"
	"path/filepath"
	"tercul/internal/app"
	"tercul/internal/app/translation"
	"tercul/internal/data/sql"
	"tercul/internal/domain"
	"tercul/internal/domain/search"
	"time"

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

// mockSearchClient is a mock implementation of the SearchClient interface.
type mockSearchClient struct{}

func (m *mockSearchClient) IndexWork(ctx context.Context, work *domain.Work, pipeline string) error {
	return nil
}


// IntegrationTestSuite provides a comprehensive test environment with either in-memory SQLite or mock repositories
type IntegrationTestSuite struct {
	suite.Suite
	App   *app.Application
	DB    *gorm.DB
	Repos *sql.Repositories
}

// 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()
	}

	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
	db.AutoMigrate(
		&domain.Work{}, &domain.User{}, &domain.Author{}, &domain.Translation{},
		&domain.Comment{}, &domain.Like{}, &domain.Bookmark{}, &domain.Collection{},
		&domain.Tag{}, &domain.Category{}, &domain.Book{}, &domain.Publisher{},
		&domain.Source{}, &domain.Copyright{}, &domain.Monetization{},
		&domain.WorkStats{}, &domain.Trending{}, &domain.UserSession{}, &domain.Localization{},
		&domain.LanguageAnalysis{}, &domain.TextMetadata{}, &domain.ReadabilityScore{},
		&domain.TranslationStats{}, &TestEntity{},
	)

	s.Repos = sql.NewRepositories(s.DB)
	var searchClient search.SearchClient = &mockSearchClient{}
	s.App = app.NewApplication(s.Repos, searchClient, nil)
}

// 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.DB.Exec("DELETE FROM trendings")
		s.DB.Exec("DELETE FROM work_stats")
		s.DB.Exec("DELETE FROM translation_stats")
	}
}

// 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,
		},
	}
	createdWork, err := s.App.Work.Commands.CreateWork(context.Background(), work)
	s.Require().NoError(err)
	if content != "" {
		translationInput := translation.CreateTranslationInput{
			Title:            title,
			Content:          content,
			Language:         language,
			TranslatableID:   createdWork.ID,
			TranslatableType: "works",
		}
		_, err = s.App.Translation.Commands.CreateTranslation(context.Background(), translationInput)
		s.Require().NoError(err)
	}
	return createdWork
}

// CreateTestTranslation creates a test translation for a work.
func (s *IntegrationTestSuite) CreateTestTranslation(workID uint, language, content string) *domain.Translation {
	translationInput := translation.CreateTranslationInput{
		Title:            "Test Translation",
		Content:          content,
		Language:         language,
		TranslatableID:   workID,
		TranslatableType: "works",
	}
	createdTranslation, err := s.App.Translation.Commands.CreateTranslation(context.Background(), translationInput)
	s.Require().NoError(err)
	return createdTranslation
}