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

public class BroadcastServer : MonoBehaviour
{
    private UdpClient udpBroadcaster;
    private Thread broadcastThread;
    private bool isRunning = true;

    void Start()
    {
        udpBroadcaster = new UdpClient();
        udpBroadcaster.EnableBroadcast = true;

        broadcastThread = new Thread(BroadcastIP);
        broadcastThread.Start();

        Debug.Log("ÏÔʾ¶ËÕýÔڹ㲥IP...");
    }

    private void BroadcastIP()
    {
        IPEndPoint endPoint = new IPEndPoint(IPAddress.Broadcast, 9999);
        string localIP = GetLocalIPAddress();

        while (isRunning)
        {
            byte[] data = Encoding.UTF8.GetBytes(localIP);
            udpBroadcaster.Send(data, data.Length, endPoint);
            Thread.Sleep(1000);
        }
    }

    private string GetLocalIPAddress()
    {
        string localIP = "127.0.0.1";
        foreach (var ip in Dns.GetHostEntry(Dns.GetHostName()).AddressList)
        {
            if (ip.AddressFamily == AddressFamily.InterNetwork)
            {
                localIP = ip.ToString();
                break;
            }
        }
        return localIP;
    }

    private void OnApplicationQuit()
    {
        isRunning = false;
        udpBroadcaster?.Close();
    }
}