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

namespace Mistox.Server {
    public class TCPConnection : IDisposable {
        
        TcpClient _client;
        TcpClientConnection _connection;

        public TCPConnection( TcpClient tcpClient, string ConnectionID ) {
            _client = tcpClient;
            _client.NoDelay = true;
            _connection = ServerInterface.Connections[ConnectionID];
            ServerInterface.ServerInstance.InvokeUserConnected( ServerInterface.Connections[ConnectionID] );
            // Start the receive thread
            Thread receiveThread = new Thread(async () => await ReceiveThread() );
            receiveThread.Start();
        }

        public async Task ReceiveThread() {
            while( _client.Connected && _connection.Connected && ServerInterface.ServerInstance.Alive ) {
                try {
                    _connection.LastHeartbeat = DateTime.UtcNow;
                    byte[] StreamData = new byte[1024];
                    int bytesRead = await _client.GetStream().ReadAsync(StreamData, 0, StreamData.Length);
                    if( bytesRead > 0 ) {
                        dynamic data = Serializer.tReceive( StreamData.Sub( 0, bytesRead ) );
                        if( data != null ) {
                            ServerInterface.ServerInstance.InvokeDataReceived( data );
                        }
                    }
                } 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() {
            _connection.Connected = false;
            ServerInterface.ServerInstance.InvokeUserDisconnected( _connection );
            ServerInterface.ServerInstance.Alive = false;
            ServerInterface.Connections.TryRemove( _connection.UserName, out _ );
        }
    }
}