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using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;
using Dapper;
using L2dotNET.DataContracts;
using L2dotNET.Encryption;
using L2dotNET.Models.Player;
using L2dotNET.Network;
using L2dotNET.Network.serverpackets;
using L2dotNET.Services.Contracts;
using L2dotNET.Utility;
using L2dotNET.World;
using Microsoft.Extensions.DependencyInjection;
using NLog;
namespace L2dotNET
{
public class GameClient
{
private static readonly Logger Log = LogManager.GetCurrentClassLogger();
public EndPoint Address { get; }
public TcpClient Client { get; }
public NetworkStream Stream { get; }
public byte[] BlowfishKey { get; set; }
public ScrambledKeyPair ScrambledPair { get; set; }
public L2Player CurrentPlayer { get; set; }
public AccountContract Account { get; set; }
public SessionKey SessionKey { get; set; }
public string AccountType { get; set; }
public string AccountTimeEnd { get; set; }
public DateTime AccountTimeLogIn { get; set; }
public bool IsDisconnected { get; set; }
public List<L2Player> AccountCharacters { get; private set; }
private readonly ICrudService<CharacterContract> _characterCrudService;
private readonly ClientManager _clientManager;
private readonly GamePacketHandler _gamePacketHandler;
private readonly GameCrypt _crypt;
private readonly ICharacterService _characterService;
public GameClient(ClientManager clientManager, TcpClient tcpClient, GamePacketHandler gamePacketHandler)
{
Log.Info($"Connection from {tcpClient.Client.RemoteEndPoint}");
Address = tcpClient.Client.RemoteEndPoint;
Client = tcpClient;
Stream = tcpClient.GetStream();
AccountCharacters = new List<L2Player>();
_crypt = new GameCrypt();
_characterCrudService = GameServer.ServiceProvider.GetService<ICrudService<CharacterContract>>();
_characterService = GameServer.ServiceProvider.GetService<ICharacterService>();
_gamePacketHandler = gamePacketHandler;
_clientManager = clientManager;
Task.Factory.StartNew(Read);
}
public byte[] EnableCrypt()
{
byte[] key = BlowFishKeygen.GetRandomKey();
_crypt.SetKey(key);
return key;
}
public async Task SendPacketAsync(GameserverPacket sbp)
{
if (IsDisconnected)
{
return;
}
sbp.Write();
byte[] data = sbp.ToByteArray();
_crypt.Encrypt(data);
List<byte> bytes = new List<byte>();
bytes.AddRange(BitConverter.GetBytes((short)(data.Length + 2)));
bytes.AddRange(data);
try
{
await Stream.WriteAsync(bytes.ToArray(), 0, bytes.Count);
await Stream.FlushAsync();
}
catch
{
Log.Info($"Client {Account?.AccountId} terminated.");
CloseConnection();
}
}
public void CloseConnection()
{
Log.Info("termination");
IsDisconnected = true;
Stream.Close();
Client.Close();
if(CurrentPlayer?.Online == 1)
{
CurrentPlayer?.SetOffline();
}
_clientManager.Disconnect(Address.ToString());
}
public async void Read()
{
try
{
while (true)
{
if (IsDisconnected)
{
return;
}
byte[] _buffer = new byte[2];
int bytesRead = await Stream.ReadAsync(_buffer, 0, 2);
if (bytesRead == 0)
{
Log.Debug("Client closed connection");
CloseConnection();
return;
}
if (bytesRead != 2)
{
throw new Exception("Wrong packet");
}
short length = BitConverter.ToInt16(_buffer, 0);
_buffer = new byte[length - 2];
bytesRead = await Stream.ReadAsync(_buffer, 0, length - 2);
if (bytesRead != length - 2)
{
throw new Exception("Wrong packet");
}
_crypt.Decrypt(_buffer);
Task.Factory.StartNew(() => _gamePacketHandler.HandlePacket(_buffer.ToPacket(), this));
}
}
catch(Exception e)
{
Log.Error(e);
CloseConnection();
}
}
public void DeleteCharacter(int charSlot)
{
AccountCharacters.RemoveAll(x => x.CharacterSlot == charSlot);
for (int i = 0; i < AccountCharacters.Count; i++)
{
AccountCharacters[i].CharacterSlot = i;
}
AccountCharacters.Select(x => x.ToContract())
.AsList()
.ForEach(x => _characterCrudService.Update(x));
}
public async Task Disconnect()
{
await CurrentPlayer?.SetOffline();
CurrentPlayer = null;
}
public async Task FetchAccountCharacters()
{
IEnumerable<L2Player> players = await _characterService.GetPlayersOnAccount(Account.AccountId);
AccountCharacters = new List<L2Player>();
int slot = 0;
foreach (L2Player player in players)
{
if (player.CharDeleteTimeExpired())
{
_characterService.DeleteCharById(player.ObjectId);
continue;
}
player.CharacterSlot = slot++;
player.Account = Account;
AccountCharacters.Add(player);
}
}
}
}