package main

import (
	"flag"
	"fmt"
	"os"
	"os/signal"
	"strconv"
	"syscall"

	dubboclient "dubbo.apache.org/dubbo-go/v3/client"
	_ "dubbo.apache.org/dubbo-go/v3/imports"
	"dubbo.apache.org/dubbo-go/v3/protocol"
	"dubbo.apache.org/dubbo-go/v3/server"

	"github.com/topfans/backend/pkg/database"
	"github.com/topfans/backend/pkg/logger"
	"github.com/topfans/backend/pkg/models"
	pbAsset "github.com/topfans/backend/pkg/proto/asset"
	pbGallery "github.com/topfans/backend/pkg/proto/gallery"
	pbUser "github.com/topfans/backend/pkg/proto/user"
	rpcclient "github.com/topfans/backend/services/galleryService/client"
	"github.com/topfans/backend/services/galleryService/provider"
	"github.com/topfans/backend/services/galleryService/repository"
	"github.com/topfans/backend/services/galleryService/service"
)

var (
	port            = flag.Int("port", getEnvInt("PORT", 20001), "Dubbo service port")
	dbHost          = flag.String("db-host", getEnv("DB_HOST", "localhost"), "Database host")
	dbPort          = flag.Int("db-port", getEnvInt("DB_PORT", 5432), "Database port")
	dbUser          = flag.String("db-user", getEnv("DB_USER", "postgres"), "Database user")
	dbPassword      = flag.String("db-password", getEnv("DB_PASSWORD", ""), "Database password")
	dbName          = flag.String("db-name", getEnv("DB_NAME", "top-fans"), "Database name")
	assetServiceURL = flag.String("asset-service-url", getEnv("ASSET_SERVICE_URL", "tri://localhost:20003"), "Asset service URL")
	userServiceURL  = flag.String("user-service-url", getEnv("USER_SERVICE_URL", "tri://localhost:20000"), "User service URL")
)

func getEnv(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}

func getEnvInt(key string, fallback int) int {
	if v := os.Getenv(key); v != "" {
		if n, err := strconv.Atoi(v); err == nil {
			return n
		}
	}
	return fallback
}

func main() {
	flag.Parse()

	// 初始化日志（必须在最前面）
	env := os.Getenv("ENV")
	if env == "" {
		env = "development"
	}

	if err := logger.Init(logger.Config{
		ServiceName: "gallery-service",
		Environment: env,
		LogLevel:    os.Getenv("LOG_LEVEL"),
	}); err != nil {
		panic(fmt.Sprintf("Failed to initialize logger: %v", err))
	}
	defer logger.Sync()

	logger.Logger.Info("Starting Gallery Service...")

	// 初始化数据库
	dbConfig := database.Config{
		Host:     *dbHost,
		Port:     *dbPort,
		User:     *dbUser,
		Password: *dbPassword,
		DBName:   *dbName,
		SSLMode:  "disable",
		TimeZone: "Asia/Shanghai",
	}

	if err := database.Init(dbConfig); err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to initialize database: %v", err))
	}
	logger.Logger.Info("Database initialized successfully")

	// 创建 Repository 层实例
	db := database.GetDB()
	// 自动迁移展馆相关表（booth_slots / exhibitions）
	if err := db.AutoMigrate(&models.BoothSlot{}, &models.Exhibition{}); err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to migrate gallery tables: %v", err))
	}

	galleryRepo := repository.NewGalleryRepository(db)
	logger.Logger.Info("Repository layer initialized")

	// 创建 Dubbo 客户端
	assetCli, err := dubboclient.NewClient(
		dubboclient.WithClientURL(*assetServiceURL),
	)
	if err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to create Asset Service Dubbo client: %v", err))
	}

	userCli, err := dubboclient.NewClient(
		dubboclient.WithClientURL(*userServiceURL),
	)
	if err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to create User Service Dubbo client: %v", err))
	}

	// 获取 Asset Service RPC 客户端
	assetServiceClient, err := pbAsset.NewAssetService(assetCli)
	if err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to create Asset Service RPC client: %v", err))
	}
	assetRPCClient := rpcclient.NewAssetRPCClient(assetServiceClient)
	logger.Logger.Info("Asset Service RPC client initialized")

	// 获取 User Service RPC 客户端
	userServiceClient, err := pbUser.NewUserSocialService(userCli)
	if err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to create User Service RPC client: %v", err))
	}
	userRPCClient := rpcclient.NewUserRPCClient(userServiceClient)
	logger.Logger.Info("User Service RPC client initialized")

	// 创建 Service 层实例
	galleryService := service.NewGalleryService(galleryRepo, assetRPCClient, userRPCClient)
	slotService := service.NewSlotService(galleryRepo, userRPCClient)
	exhibitionService := service.NewExhibitionService(galleryRepo, assetRPCClient)
	logger.Logger.Info("Service layer initialized")

	// 创建并启动清理 Worker（注入 assetRPCClient 以便下架时清除点赞记录）
	cleanupWorker := service.NewCleanupWorker(galleryRepo, assetRPCClient)
	go cleanupWorker.Start()
	logger.Logger.Info("Cleanup worker started")

	// 创建 Provider 层实例
	galleryProvider := provider.NewGalleryProvider(galleryService, slotService, exhibitionService)
	logger.Logger.Info("Provider layer initialized")

	// 创建 Dubbo 服务器
	srv, err := server.NewServer(
		server.WithServerProtocol(
			protocol.WithPort(*port),
			protocol.WithTriple(),
		),
	)
	if err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to create Dubbo server: %v", err))
	}

	// 使用 Triple 协议生成的 RegisterHandler 函数注册服务
	if err := pbGallery.RegisterGalleryServiceHandler(srv, galleryProvider); err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to register Gallery Service: %v", err))
	}

	// 启动服务
	if err := srv.Serve(); err != nil {
		logger.Logger.Fatal(fmt.Sprintf("Failed to start Gallery Service: %v", err))
	}

	logger.Logger.Info(fmt.Sprintf("Gallery Service started successfully on port %d", *port))

	// 等待退出信号
	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit

	logger.Logger.Info("Shutting down Gallery Service...")

	// 停止清理 Worker
	cleanupWorker.Stop()
	logger.Logger.Info("Cleanup worker stopped")
}