package main

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

	"github.com/gorilla/websocket"
)

var upgrader = websocket.Upgrader{
	ReadBufferSize:  1024,
	WriteBufferSize: 1024,
	CheckOrigin: func(r *http.Request) bool {
		return true // 生产环境应校验来源域名
	},
}

func wsHandler(w http.ResponseWriter, r *http.Request) {
	conn, err := upgrader.Upgrade(w, r, nil) // 升级HTTP为WebSocket
	if err != nil {
		log.Println("升级失败:", err)
		return
	}
	defer conn.Close()

	for {
		messageType, p, err := conn.ReadMessage() // 接收消息
		if err != nil {
			log.Println("读取失败:", err)
			break
		}
		log.Printf("收到: %s", p)

		// 处理消息（示例：原样返回）
		if err := conn.WriteMessage(messageType, p); err != nil {
			log.Println("写入失败:", err)
			break
		}
	}
}

func main() {
	http.HandleFunc("/ws", wsHandler)
	log.Fatal(http.ListenAndServe(":8080", nil))
}

// 处理关闭信号的函数
func handleShutdownSignals() {
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)

	// 阻塞等待信号
	sig := <-sigChan
	log.Printf("接收到信号: %v, 关闭所有浏览器...", sig)

	// 强制退出程序
	os.Exit(0)
}