package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/gin-gonic/gin"

	"market-data-service/adapter"
	"market-data-service/adapter/tushare"
	"market-data-service/api"
	"market-data-service/internal/handler"
	"market-data-service/internal/monitor"
	"market-data-service/internal/repository"
	"market-data-service/internal/service"
	"market-data-service/internal/websocket"
)

func main() {
	// 配置
	port := getEnv("PORT", "8080")
	dbURL := getEnv("DATABASE_URL", "postgres://user:password@localhost:5432/marketdata?sslmode=disable")
	configPath := getEnv("CONFIG_PATH", "./config.json")
	tushareToken := getEnv("TUSHARE_TOKEN", "")

	// 设置运行模式
	ginMode := getEnv("GIN_MODE", "debug")
	gin.SetMode(ginMode)

	// 连接数据库
	db, err := repository.NewDB(dbURL)
	if err != nil {
		log.Fatalf("Failed to connect to database: %v", err)
	}
	defer db.Close()

	// 初始化配置服务
	configService, err := service.NewConfigService(configPath)
	if err != nil {
		log.Printf("Warning: Failed to load config from %s: %v", configPath, err)
		configService, _ = service.NewConfigService("")
	}

	// 初始化适配器服务
	adapterService := service.NewAdapterService()

	// 初始化测试服务
	testService := service.NewTestService()

	// 初始化Repository
	stockRepo := repository.NewStockRepository(db)
	futuresRepo := repository.NewFuturesRepository(db)

	// 初始化数据源适配器（如果配置了token）
	var dataSourceAdapter adapter.DataSourceAdapter
	if tushareToken != "" {
		tushareAdapter := tushare.NewAdapter()
		if err := tushareAdapter.Connect(map[string]string{
			"token": tushareToken,
		}); err != nil {
			log.Printf("Warning: Failed to connect to Tushare: %v", err)
		} else {
			dataSourceAdapter = tushareAdapter
			log.Println("Tushare adapter initialized successfully")
		}
	} else {
		log.Println("Warning: TUSHARE_TOKEN not set, fallback to source is disabled")
	}

	// 初始化Service（注入adapter实现回源功能）
	stockService := service.NewStockService(stockRepo, dataSourceAdapter)
	futuresService := service.NewFuturesService(futuresRepo, dataSourceAdapter)
	adminService := service.NewAdminService(db)

	// 初始化Handler
	h := handler.NewHandler(stockService, futuresService, adminService)

	// 初始化管理后台Handler
	adminHandler := handler.NewAdminHandlerImpl(configService, adapterService, testService)

	// 初始化WebSocket Hub
	hub := websocket.NewHub()
	go hub.Run()

	// 初始化WebSocket Server
	wsServer := websocket.NewServer(hub)

	// 初始化数据质量监控
	alertSender := &monitor.LogAlertSender{}
	dataMonitor := monitor.NewMonitor(db, stockRepo, futuresRepo, alertSender)

	// 启动每日检查定时任务
	ctx := context.Background()
	dataMonitor.StartDailyCheckCron(ctx)

	// 创建Gin引擎
	router := gin.New()
	router.Use(gin.Recovery())
	router.Use(loggerMiddleware())

	// 注册API路由
	apiRouter := api.NewRouter(h)
	apiRouter.Register(router)

	// 注册WebSocket路由
	router.GET("/v1/stream", wsServer.HandleWebSocket)

	// 注册管理后台路由
	adminRouter := api.NewAdminRouter(h, adminHandler, adminHandler, adminHandler)
	adminRouter.Register(router)

	// 创建HTTP服务器
	srv := &http.Server{
		Addr:    ":" + port,
		Handler: router,
	}

	// 启动服务器（异步）
	go func() {
		log.Printf("Server starting on port %s", port)
		log.Printf("Admin dashboard: http://localhost:%s/admin", port)
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("Server failed to start: %v", err)
		}
	}()

	// 等待中断信号
	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
	<-quit

	log.Println("Shutting down server...")

	// 优雅关闭
	shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	if err := srv.Shutdown(shutdownCtx); err != nil {
		log.Printf("Server forced to shutdown: %v", err)
	}

	log.Println("Server exited")
}

// loggerMiddleware 日志中间件
func loggerMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		start := time.Now()
		path := c.Request.URL.Path
		raw := c.Request.URL.RawQuery

		c.Next()

		latency := time.Since(start)
		clientIP := c.ClientIP()
		method := c.Request.Method
		statusCode := c.Writer.Status()

		if raw != "" {
			path = path + "?" + raw
		}

		log.Printf("[GIN] %v | %3d | %13v | %15s | %-7s %s",
			start.Format("2006/01/02 - 15:04:05"),
			statusCode,
			latency,
			clientIP,
			method,
			path,
		)
	}
}

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