namespace Holo.Socketservers
{
    using Holo;
    using Holo.Virtual.Users;
    using System;
    using System.Collections.Generic;
    using System.Net;
    using System.Net.Sockets;

    public static class gameSocketServer
    {
        private static int _acceptedConnections;
        private static HashSet<int> _activeConnections;
        private static int _maxConnections;
        private static int _Port;
        private static Socket socketHandler;

        private static void connectionRequest(IAsyncResult iAr)
        {
            try
            {
                int item = 0;
                for (int i = 1; i < _maxConnections; i++)
                {
                    if (!_activeConnections.Contains(i))
                    {
                        item = i;
                        break;
                    }
                }
                if (item > 0)
                {
                    Socket connectionSocket = ((Socket) iAr.AsyncState).EndAccept(iAr);
                    Out.WriteLine(string.Concat(new object[] { "Connessione accettata [", item, "] da ", connectionSocket.RemoteEndPoint.ToString().Split(new char[] { ':' })[0] }));
                    _activeConnections.Add(item);
                    _acceptedConnections++;
                    virtualUser user = new virtualUser(item, connectionSocket);
                }
            }
            catch
            {
            }
            socketHandler.BeginAccept(new AsyncCallback(gameSocketServer.connectionRequest), socketHandler);
        }

        internal static void freeConnection(int connectionID)
        {
            if (_activeConnections.Contains(connectionID))
            {
                _activeConnections.Remove(connectionID);
                Out.WriteLine("Connessione siglata [" + connectionID + "] libera.");
            }
        }

        internal static bool Init(int bindPort, int maxConnections)
        {
            _Port = bindPort;
            _maxConnections = maxConnections;
            _activeConnections = new HashSet<int>();
            socketHandler = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            Out.WriteLine("Avvio del server di gioco asincrono sulla porta " + bindPort + "...");
            try
            {
                socketHandler.Bind(new IPEndPoint(IPAddress.Any, bindPort));
                socketHandler.Listen(0x19);
                socketHandler.BeginAccept(new AsyncCallback(gameSocketServer.connectionRequest), socketHandler);
                Out.WriteLine("Server di gioco asincrono avviato sulla porta " + bindPort);
                Out.WriteLine("Massimo di connessioni simultane " + maxConnections);
                return true;
            }
            catch
            {
                Out.WriteError("Errore durante il tentativo di avvio del server di gioco sulla porta " + bindPort);
                Out.WriteError("Porta " + bindPort + " invalida o gi\x00e0 occupata.");
                return false;
            }
        }

        internal static int acceptedConnections
        {
            get
            {
                return _acceptedConnections;
            }
        }

        internal static int maxConnections
        {
            get
            {
                return _maxConnections;
            }
            set
            {
                _maxConnections = value;
            }
        }
    }
}