using System;
using System.Net.Sockets;
using System.Threading;
using System.Threading.Tasks;

namespace Mistox.Server {
    public class TCPConnection : IDisposable {
        
        TcpClient _client;
        MistoxServer _instance;
        string _connectionID;

        public TCPConnection( TcpClient tcpClient, MistoxServer ServerInstance, string ConnectionID ) {
            _client = tcpClient;
            _instance = ServerInstance;
            _connectionID = ConnectionID;
            _client.NoDelay = true;

            // Start the receive thread
            Thread receiveThread = new Thread(async () => await ReceiveThread() );
            receiveThread.Start();
        }

        public async Task ReceiveThread() {
            while( _client.Connected && _instance.Connections[_connectionID].Connected ) {
                try {
                    _instance.Connections[_connectionID].LastHeartbeat = DateTime.UtcNow;
                    byte[] StreamData = new byte[1024];
                    int bytesRead = await _client.GetStream().ReadAsync(StreamData, 0, StreamData.Length);
                    if( bytesRead > 0 ) {
                        dynamic data = mSerialize.tReceive( StreamData.Sub( 0, bytesRead ) );
                        if( data != null ) {
                            _instance.onReceived?.Invoke( data, new EventArgs() );
                        }
                    }
                } catch( Exception ) {
                    Console.WriteLine( "User disconnected" );
                    Dispose();
                }
            }
        }

        public async Task Send<T>( T packet ) {
            byte[] byteData = DataPacket.Serialize( packet );
            await _client.GetStream().WriteAsync( byteData, 0, byteData.Length );
        }

        public void Dispose() {
            _instance.Connections[_connectionID].Connected = false;
            _instance.onUserDisconnected?.Invoke( _instance.Connections[_connectionID], new EventArgs() );
            _instance.Connections.TryRemove( _connectionID, out _ );
        }
    }
}