package main

import (
	"context"
	"doudizhu-server/internal/captcha"
	"doudizhu-server/internal/db"
	"doudizhu-server/internal/game"
	"doudizhu-server/internal/handlers"
	"doudizhu-server/internal/redis"
	"doudizhu-server/internal/ws"
	"log"
	"net/http"
	"os"
	"os/signal"
	"strconv"
	"syscall"
	"time"
)

func main() {
	redisAddr := getEnv("REDIS_ADDR", "localhost:6379")

	redisClient, err := redis.NewClient(redis.Config{
		Addr:     redisAddr,
		Password: "",
		DB:       0,
	})
	if err != nil {
		log.Fatalf("Failed to connect to Redis: %v", err)
	}
	defer redisClient.Close()
	log.Println("Connected to Redis:", redisAddr)

	dbHost := getEnv("DB_HOST", "localhost")
	dbPort, _ := strconv.Atoi(getEnv("DB_PORT", "5432"))
	dbUser := getEnv("DB_USER", "postgres")
	dbPassword := getEnv("DB_PASSWORD", "postgres")
	dbName := getEnv("DB_NAME", "doudizhu")

	database, err := db.New(db.Config{
		Host:     dbHost,
		Port:     dbPort,
		User:     dbUser,
		Password: dbPassword,
		Database: dbName,
	})
	if err != nil {
		log.Fatalf("Failed to connect to PostgreSQL: %v", err)
	}
	defer database.Close()
	log.Println("Connected to PostgreSQL:", dbHost)

	gameMgr := game.NewGameManager(redisClient)
	hub := ws.NewHub(gameMgr)
	go hub.Run()

	captchaMgr := captcha.NewManager(redisClient)
	h := handlers.NewHandler(gameMgr, hub, redisClient, database, captchaMgr)

	mux := http.NewServeMux()

	mux.HandleFunc("/api/auth/captcha", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "GET" {
			h.GetCaptcha(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/auth/register", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "POST" {
			h.Register(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/auth/login", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "POST" {
			h.Login(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/auth/validate", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "GET" {
			h.ValidateToken(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/auth/logout", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "POST" {
			h.Logout(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/rooms", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "POST" {
			h.CreateRoom(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/rooms/current", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "GET" {
			h.GetCurrentRoom(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/rooms/leave", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "POST" {
			h.LeaveRoom(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/rooms/", func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "POST" {
			h.JoinRoom(w, r)
		} else {
			http.NotFound(w, r)
		}
	})

	mux.HandleFunc("/api/ws", h.WebSocket)

	srv := &http.Server{
		Addr:    ":8080",
		Handler: mux,
	}

	go func() {
		log.Println("App server starting on :8080")
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatal(err)
		}
	}()

	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit
	log.Println("Shutting down server...")

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

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

	hub.Stop()
	gameMgr.Stop()
	log.Println("Server stopped")
}

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