using UnityEngine;
using UnityEngine.UI;
using System.Net.Sockets;
using System.Net;
using System.Text;
using System.Threading;

public class TouchClient : MonoBehaviour
{
    private TcpClient client;
    private NetworkStream stream;
    private bool isConnected = false;

    private UdpClient udpListener;
    private Thread udpThread;

    void Start()
    {
        udpListener = new UdpClient(9999);
        udpThread = new Thread(ListenForBroadcast);
        udpThread.Start();

        Debug.Log("触摸端等待显示端广播...");

    }

    private void ListenForBroadcast()
    {
        IPEndPoint endPoint = new IPEndPoint(IPAddress.Any, 9999);

        while (!isConnected)
        {
            byte[] data = udpListener.Receive(ref endPoint);
            string serverIp = Encoding.UTF8.GetString(data);

            Debug.Log("发现显示端IP: " + serverIp);
            ConnectToServer(serverIp, 8888);
        }
    }

    private void ConnectToServer(string ip, int port)
    {
        try
        {
            client = new TcpClient();
            client.Connect(ip, port);
            stream = client.GetStream();
            isConnected = true;
            Debug.Log("触摸端已连接到显示端: " + ip);
        }
        catch
        {
            Debug.Log("连接显示端失败");
        }
    }

    void SendMessageToServer(string msg)
    {
        if (isConnected && stream != null)
        {
            byte[] data = Encoding.UTF8.GetBytes(msg);
            stream.Write(data, 0, data.Length);
            Debug.Log("发送指令: " + msg);
        }
    }

    private void OnApplicationQuit()
    {
        udpListener?.Close();
        stream?.Close();
        client?.Close();
    }
}