package main

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

	"dubbo.apache.org/dubbo-go/v3/protocol"
	"dubbo.apache.org/dubbo-go/v3/server"

	_ "dubbo.apache.org/dubbo-go/v3/imports"

	"github.com/topfans/backend/pkg/database"
	"github.com/topfans/backend/pkg/logger"
	pb "github.com/topfans/backend/pkg/proto/moderation"
	"github.com/topfans/backend/services/moderationService/client"
	"github.com/topfans/backend/services/moderationService/config"
	"github.com/topfans/backend/services/moderationService/provider"
	"github.com/topfans/backend/services/moderationService/repository"
	"github.com/topfans/backend/services/moderationService/service"
)

var (
	port            = flag.Int("port", getEnvInt("PORT", 20011), "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")
	redisHost       = flag.String("redis-host", getEnv("REDIS_HOST", "localhost"), "Redis host")
	redisPort       = flag.Int("redis-port", getEnvInt("REDIS_PORT", 6379), "Redis port")
	redisPassword   = flag.String("redis-password", getEnv("REDIS_PASSWORD", ""), "Redis password")
	redisDB         = flag.Int("redis-db", getEnvInt("REDIS_DB", 0), "Redis DB")
)

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
	env := os.Getenv("ENV")
	if env == "" {
		env = "development"
	}
	if err := logger.Init(logger.Config{
		ServiceName: "moderation-service",
		Environment: env,
		LogLevel:    os.Getenv("LOG_LEVEL"),
	}); err != nil {
		panic(fmt.Sprintf("Failed to initialize logger: %v", err))
	}
	defer logger.Sync()
	logger.Sugar.Info("Starting Moderation Service on port ", *port)

	// 初始化数据库
	if err := initDatabase(); err != nil {
		logger.Sugar.Fatalf("Failed to initialize database: %v", err)
	}
	db := database.GetDB()

	// 初始化 Redis
	rdb := client.NewRedisClient(*redisHost, *redisPort, *redisPassword, *redisDB)

	// 初始化 Repository + TxHelper
	repo := repository.NewModerationRepository(db)
	tx := service.NewTxHelper(db)

	// 初始化 Client
	assetClient := client.NewAssetClient(db)
	userClient := client.NewUserClient(db)
	notifClient, err := client.NewNotificationClient("", nil)
	if err != nil {
		logger.Sugar.Fatalf("Failed to create notification client: %v", err)
	}

	// 初始化 Config
	cfg := config.Default

	// 初始化 Service
	categorySvc := service.NewCategoryService(repo)
	autoHideSvc := service.NewAutoHideService(repo, rdb, tx, cfg)
	reportSvc := service.NewReportService(repo, tx, assetClient, userClient, notifClient, autoHideSvc, categorySvc, cfg)
	feedbackSvc := service.NewFeedbackService(repo, categorySvc, notifClient, cfg)

	// 初始化 Provider
	modProvider := provider.NewModerationProvider(reportSvc, feedbackSvc, categorySvc)

	// 启动 Dubbo Server
	srv, err := server.NewServer(
		server.WithServerProtocol(
			protocol.WithPort(*port),
			protocol.WithTriple(),
		),
	)
	if err != nil {
		logger.Sugar.Fatalf("Failed to create Dubbo server: %v", err)
	}
	if err := pb.RegisterModerationServiceHandler(srv, modProvider); err != nil {
		logger.Sugar.Fatalf("Failed to register ModerationService handler: %v", err)
	}
	logger.Sugar.Info("Dubbo-go moderation provider registered successfully",
		"service", "topfans.moderation.ModerationService", "port", *port)

	// 后台启动 Dubbo
	go func() {
		if err := srv.Serve(); err != nil {
			logger.Sugar.Fatalf("Failed to serve Dubbo: %v", err)
		}
	}()

	// 优雅关闭
	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit
	logger.Sugar.Info("Shutting down moderation service...")
}

func initDatabase() error {
	cfg := database.Config{
		Host:     *dbHost,
		Port:     *dbPort,
		User:     *dbUser,
		Password: *dbPassword,
		DBName:   *dbName,
		SSLMode:  "disable",
		TimeZone: "Asia/Shanghai",
	}
	return database.Init(cfg)
}