using LiteNetLib;
using LiteNetLib.Utils;

const int    PORT           = 9500;
const string CONNECTION_KEY = "game";

var listener = new EventBasedNetListener();
var server   = new NetManager(listener);

listener.ConnectionRequestEvent += request =>
{
    request.AcceptIfKey(CONNECTION_KEY);
};

listener.PeerConnectedEvent += peer =>
{
    Console.WriteLine($"[CONNECT] {peer.Port}  (ID:{peer.Id}, Total:{server.ConnectedPeersCount})");
};

listener.PeerDisconnectedEvent += (peer, info) =>
{
    Console.WriteLine($"[DISCONNECT] {peer.Port}  Reason:{info.Reason}  (Remaining:{server.ConnectedPeersCount})");
};

listener.NetworkReceiveEvent += (fromPeer, reader, channel, deliveryMethod) =>
{
    var msg = reader.GetString();
    Console.WriteLine($"[RECV] ID:{fromPeer.Id} → {msg}");

    // 클라이언트 ReceivedCount 증가시키려면 응답 필요
    var writer = new NetDataWriter();
    writer.Put($"ack:{msg}");
    fromPeer.Send(writer, deliveryMethod);

    reader.Recycle();
};

server.Start(PORT);
Console.WriteLine($"[SERVER] Started on port {PORT}. Press Enter to stop.");

while (!Console.KeyAvailable)
{
    server.PollEvents();
    Thread.Sleep(15);
}

server.Stop();
Console.WriteLine("[SERVER] Stopped.");