using UnityEngine;
using System.Net.Sockets;
using System.Net;
using System.Text;
using System.Threading;
using System.Collections.Generic;

public class DisplayServer : MonoBehaviour
{
    private TcpListener listener;
    private Thread listenThread;
    private bool isRunning = true;

    public Transform background;
    private string latestMsg = "";


    void Start()
    {
        Screen.SetResolution(3328, 1352, false);

        listener = new TcpListener(IPAddress.Any, 8888);
        listener.Start();

        listenThread = new Thread(ListenForClients);
        listenThread.Start();

        Debug.Log("显示端服务器已启动，等待触摸端连接...");

        ShowPage("首页");
    }

    private void ListenForClients()
    {
        while (isRunning)
        {
            TcpClient client = listener.AcceptTcpClient();
            Debug.Log("触摸端已连接！");

            Thread clientThread = new Thread(HandleClientComm);
            clientThread.Start(client);
        }
    }

    private void HandleClientComm(object clientObj)
    {
        TcpClient tcpClient = (TcpClient)clientObj;
        NetworkStream clientStream = tcpClient.GetStream();

        byte[] message = new byte[4096];
        int bytesRead;

        while (isRunning)
        {
            try
            {
                bytesRead = clientStream.Read(message, 0, 4096);
            }
            catch
            {
                Debug.Log("触摸端断开连接");
                break;
            }

            if (bytesRead == 0) break;

            string data = Encoding.UTF8.GetString(message, 0, bytesRead);
            Debug.Log("收到指令: " + data); 
            latestMsg = data;
        }
    }

    private void Update()
    {
        if (!string.IsNullOrEmpty(latestMsg))
        {
            if (!string.IsNullOrEmpty(latestMsg))
            {
                ShowPage(latestMsg);
                latestMsg = "";
            }
        }
    }

    private void ShowPage(string pageName)
    {
        if (background == null)
        {
            Debug.LogError($"BG未绑定！");
            return;
        }

        foreach (Transform child in background)
        {
            child.gameObject.SetActive(child.name == pageName);
        }
        Debug.Log($"显示端切换页面：{pageName}");
    }

    private void OnApplicationQuit()
    {
        isRunning = false;
        listener.Stop();
    }
}