/*****************************************************************************
 * PokerTH - The open source texas holdem engine                             *
 * Copyright (C) 2006-2012 Felix Hammer, Florian Thauer, Lothar May          *
 *                                                                           *
 * This program is free software: you can redistribute it and/or modify      *
 * it under the terms of the GNU Affero General Public License as            *
 * published by the Free Software Foundation, either version 3 of the        *
 * License, or (at your option) any later version.                           *
 *                                                                           *
 * This program is distributed in the hope that it will be useful,           *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
 * GNU Affero General Public License for more details.                       *
 *                                                                           *
 * You should have received a copy of the GNU Affero General Public License  *
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.     *
 *                                                                           *
 *                                                                           *
 * Additional permission under GNU AGPL version 3 section 7                  *
 *                                                                           *
 * If you modify this program, or any covered work, by linking or            *
 * combining it with the OpenSSL project's OpenSSL library (or a             *
 * modified version of that library), containing parts covered by the        *
 * terms of the OpenSSL or SSLeay licenses, the authors of PokerTH           *
 * (Felix Hammer, Florian Thauer, Lothar May) grant you additional           *
 * permission to convey the resulting work.                                  *
 * Corresponding Source for a non-source form of such a combination          *
 * shall include the source code for the parts of OpenSSL used as well       *
 * as that of the covered work.                                              *
 *****************************************************************************/
/* Network server lobby thread. */

#ifndef _SERVERLOBBYTHREAD_H_
#define _SERVERLOBBYTHREAD_H_

#include <boost/asio.hpp>
#include <boost/asio/steady_timer.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <boost/uuid/uuid_generators.hpp>

#include <net/sessionmanager.h>
#include <net/netpacket.h>
#include <db/serverdbcallback.h>
#include <gui/guiinterface.h>
#include <gamedata.h>

#define NET_LOBBY_THREAD_TERMINATE_TIMEOUT_MSEC		20000
#define NET_ADMIN_IRC_TERMINATE_TIMEOUT_MSEC		4000


class SenderHelper;
class InternalServerCallback;
class ServerIrcBotCallback;
class ServerGame;
class ServerBanManager;
class ConfigFile;
class AvatarManager;
class ChatCleanerManager;
class ServerDBInterface;
struct GameData;
class Game;
struct Gsasl;

class ServerLobbyThread : public Thread, public boost::enable_shared_from_this<ServerLobbyThread>
{
public:
	ServerLobbyThread(GuiInterface &gui, ServerMode mode, ServerIrcBotCallback &ircBotCb, ConfigFile &serverConfig, AvatarManager &avatarManager,
					  boost::shared_ptr<boost::asio::io_service> ioService);
	virtual ~ServerLobbyThread();

	void Init(const std::string &logDir);
	virtual void SignalTermination();

	void AddConnection(boost::shared_ptr<SessionData> sessionData);
	void ReAddSession(boost::shared_ptr<SessionData> session, int reason, unsigned gameId);
	void MoveSessionToGame(boost::shared_ptr<ServerGame> game, boost::shared_ptr<SessionData> session, bool autoLeave, bool spectateOnly);
	void SessionError(boost::shared_ptr<SessionData> session, int errorCode);
	void ResubscribeLobbyMsg(boost::shared_ptr<SessionData> session);
	void NotifyPlayerJoinedLobby(unsigned playerId);
	void NotifyPlayerLeftLobby(unsigned playerId);
	void NotifyPlayerJoinedGame(unsigned gameId, unsigned playerId);
	void NotifyPlayerLeftGame(unsigned gameId, unsigned playerId);
	void NotifySpectatorJoinedGame(unsigned gameId, unsigned playerId);
	void NotifySpectatorLeftGame(unsigned gameId, unsigned playerId);
	void NotifyGameAdminChanged(unsigned gameId, unsigned newAdminPlayerId);
	void NotifyStartingGame(unsigned gameId);
	void NotifyReopeningGame(unsigned gameId);

	void DispatchPacket(boost::shared_ptr<SessionData> session, boost::shared_ptr<NetPacket> packet);
	void HandleGameRetrievePlayerInfo(boost::shared_ptr<SessionData> session, const PlayerInfoRequestMessage &playerInfoRequest);
	void HandleGameRetrieveAvatar(boost::shared_ptr<SessionData> session, const AvatarRequestMessage &retrieveAvatar);
	void HandleGameReportGame(boost::shared_ptr<SessionData> session, const ReportGameMessage &reportGame);
	void HandleChatRequest(boost::shared_ptr<SessionData> session, const ChatRequestMessage &chatRequest);
	void HandleAdminRemoveGame(boost::shared_ptr<SessionData> session, const AdminRemoveGameMessage &removeGame);
	void HandleAdminBanPlayer(boost::shared_ptr<SessionData> session, const AdminBanPlayerMessage &banPlayer);

	bool KickPlayerByName(const std::string &playerName);
	bool RemoveGameByPlayerName(const std::string &playerName);
	std::string GetPlayerIPAddress(const std::string &playerName) const;
	std::string GetPlayerNameFromId(unsigned playerId) const;
	void RemovePlayer(unsigned playerId, unsigned errorCode);
	void MutePlayerInGame(unsigned playerId);

	void SendGlobalChat(const std::string &message);
	void SendGlobalMsgBox(const std::string &message);
	void SendChatBotMsg(const std::string &message);
	void SendChatBotMsg(unsigned gameId, const std::string &message);
	void ReconnectChatBot();

	void AddComputerPlayer(boost::shared_ptr<PlayerData> player);
	void RemoveComputerPlayer(boost::shared_ptr<PlayerData> player);

	bool SendToLobbyPlayer(unsigned playerId, boost::shared_ptr<NetPacket> packet);

	u_int32_t GetNextSessionId();
	u_int32_t GetNextUniquePlayerId();
	u_int32_t GetNextGameId();
	ServerCallback &GetCallback();

	AvatarManager &GetAvatarManager();
	ChatCleanerManager &GetChatCleaner();

	ServerStats GetStats() const;
	boost::posix_time::ptime GetStartTime() const;
	ServerMode GetServerMode() const;

	SenderHelper &GetSender();
	boost::asio::io_service &GetIOService();
	boost::shared_ptr<ServerDBInterface> GetDatabase();
	ServerBanManager &GetBanManager();

	SessionDataCallback &GetSessionDataCallback();

protected:

	typedef std::deque<boost::shared_ptr<boost::asio::ip::tcp::socket> > ConnectQueue;
	typedef std::list<boost::shared_ptr<SessionData> > SessionList;
	typedef std::list<SessionId> SessionIdList;
	typedef std::map<SessionId, boost::timers::portable::microsec_timer> TimerSessionMap;
	typedef std::map<unsigned, boost::shared_ptr<ServerGame> > GameMap;
	typedef std::map<std::string, boost::timers::portable::microsec_timer> TimerClientAddressMap;
	typedef std::list<unsigned> RemoveGameList;

	// Main function of the thread.
	virtual void Main();
	void RegisterTimers();
	void CancelTimers();
	void InitAuthContext();
	void ClearAuthContext();
	void InitChatCleaner();

	void HandlePacket(boost::shared_ptr<SessionData> session, boost::shared_ptr<NetPacket> packet);
	void HandleNetPacketInit(boost::shared_ptr<SessionData> session, const InitMessage &initMessage);
	void HandleNetPacketAuthClientResponse(boost::shared_ptr<SessionData> session, const AuthClientResponseMessage &clientResponse);
	void HandleNetPacketAvatarHeader(boost::shared_ptr<SessionData> session, const AvatarHeaderMessage &avatarHeader);
	void HandleNetPacketUnknownAvatar(boost::shared_ptr<SessionData> session, const UnknownAvatarMessage &unknownAvatar);
	void HandleNetPacketAvatarFile(boost::shared_ptr<SessionData> session, const AvatarDataMessage &avatarData);
	void HandleNetPacketAvatarEnd(boost::shared_ptr<SessionData> session, const AvatarEndMessage &avatarEnd);
	void HandleNetPacketRetrievePlayerInfo(boost::shared_ptr<SessionData> session, const PlayerInfoRequestMessage &playerInfoRequest);
	void HandleNetPacketRetrieveAvatar(boost::shared_ptr<SessionData> session, const AvatarRequestMessage &retrieveAvatar);
	void HandleNetPacketCreateGame(boost::shared_ptr<SessionData> session, const JoinNewGameMessage &newGame);
	void HandleNetPacketJoinGame(boost::shared_ptr<SessionData> session, const JoinExistingGameMessage &joinGame);
	void HandleNetPacketRejoinGame(boost::shared_ptr<SessionData> session, const RejoinExistingGameMessage &rejoinGame);
	void HandleNetPacketChatRequest(boost::shared_ptr<SessionData> session, const ChatRequestMessage &chatRequest);
	void HandleNetPacketRejectGameInvitation(boost::shared_ptr<SessionData> session, const RejectGameInvitationMessage &reject);
	void HandleNetPacketReportGame(boost::shared_ptr<SessionData> session, const ReportGameMessage &report);
	void HandleNetPacketAdminRemoveGame(boost::shared_ptr<SessionData> session, const AdminRemoveGameMessage &removeGame);
	void HandleNetPacketAdminBanPlayer(boost::shared_ptr<SessionData> session, const AdminBanPlayerMessage &banPlayer);
	// TODO would be better to use state pattern here.
	void AuthChallenge(boost::shared_ptr<SessionData> session, const std::string &secret);
	void CheckAvatarBlacklist(boost::shared_ptr<SessionData> session);
	void AvatarBlacklisted(unsigned playerId);
	void AvatarOK(unsigned playerId);
	void InitAfterLogin(boost::shared_ptr<SessionData> session);
	void EstablishSession(boost::shared_ptr<SessionData> session);
	void AuthenticatePlayer(boost::shared_ptr<SessionData> session);
	void UserValid(unsigned playerId, const DBPlayerData &dbPlayerData);
	void UserInvalid(unsigned playerId);
	void UserBlocked(unsigned playerId);

	void SendReportAvatarResult(unsigned byPlayerId, unsigned reportedPlayerId, bool success);
	void SendReportGameResult(unsigned byPlayerId, unsigned reportedGameId, bool success);
	void SendAdminBanPlayerResult(unsigned byPlayerId, unsigned reportedPlayerId, bool success);
	void RequestPlayerAvatar(boost::shared_ptr<SessionData> session);
	void TimerRemoveGame(const boost::system::error_code &ec);
	void TimerRemovePlayer(const boost::system::error_code &ec);
	void TimerUpdateClientLoginLock(const boost::system::error_code &ec);
	void TimerCleanupAvatarCache(const boost::system::error_code &ec);

	bool IsGameNameInUse(const std::string &gameName) const;
	boost::shared_ptr<ServerGame> InternalGetGameFromId(unsigned gameId);
	void InternalAddGame(boost::shared_ptr<ServerGame> game);
	void InternalRemoveGame(boost::shared_ptr<ServerGame> game);
	void InternalRemovePlayer(unsigned playerId, unsigned errorCode);
	void InternalMutePlayerInGame(unsigned playerId);
	void InternalResubscribeMsg(boost::shared_ptr<SessionData> session);

	void HandleReAddedSession(boost::shared_ptr<SessionData> session);

	void SessionTimeoutWarning(boost::shared_ptr<SessionData> session, unsigned remainingSec);

	void CleanupSessionMap();

	void CloseSession(boost::shared_ptr<SessionData> session);
	void SendError(boost::shared_ptr<SessionData> s, int errorCode);
	void SendJoinGameFailed(boost::shared_ptr<SessionData> s, unsigned gameId, int reason);
	void SendPlayerList(boost::shared_ptr<SessionData> s);
	void SendGameList(boost::shared_ptr<SessionData> s);
	void UpdateStatisticsNumberOfPlayers();
	void BroadcastStatisticsUpdate(const ServerStats &stats);

	void ReadStatisticsFile();
	void TimerSaveStatisticsFile(const boost::system::error_code &ec);

	InternalServerCallback &GetSenderCallback();
	GuiInterface &GetGui();
	ServerIrcBotCallback &GetIrcBotCallback();

	unsigned GetPlayerId(const std::string &name) const;

	static boost::shared_ptr<NetPacket> CreateNetPacketPlayerListNew(unsigned playerId);
	static boost::shared_ptr<NetPacket> CreateNetPacketPlayerListLeft(unsigned playerId);
	static boost::shared_ptr<NetPacket> CreateNetPacketGameListNew(const ServerGame &game);
	static boost::shared_ptr<NetPacket> CreateNetPacketGameListUpdate(unsigned gameId, GameMode mode);

	u_int32_t GetRejoinGameIdForPlayer(const std::string &playerName, const std::string &guid, unsigned &outPlayerUniqueId);

private:

	boost::shared_ptr<boost::asio::io_service> m_ioService;

	boost::shared_ptr<InternalServerCallback> m_internalServerCallback;
	boost::shared_ptr<SenderHelper> m_sender;

	SessionManager m_sessionManager;
	SessionManager m_gameSessionManager;

	Gsasl *m_authContext;

	TimerClientAddressMap m_timerClientAddressMap;
	mutable boost::mutex m_timerClientAddressMapMutex;

	RemoveGameList m_removeGameList;
	mutable boost::mutex m_removeGameListMutex;

	PlayerDataMap m_computerPlayers;
	mutable boost::mutex m_computerPlayersMutex;

	GameMap m_gameMap;

	GuiInterface &m_gui;
	ServerIrcBotCallback &m_ircBotCb;
	AvatarManager &m_avatarManager;

	const ServerMode m_mode;
	std::string m_statisticsFileName;
	ConfigFile &m_serverConfig;
	u_int32_t m_curGameId;

	u_int32_t m_curUniquePlayerId;
	u_int32_t m_curSessionId;
	mutable boost::mutex m_curUniquePlayerIdMutex;

	ServerStats m_statData;
	bool m_statDataChanged;
	mutable boost::mutex m_statMutex;

	boost::shared_ptr<ServerBanManager> m_banManager;
	boost::shared_ptr<ChatCleanerManager> m_chatCleanerManager;
	boost::shared_ptr<ServerDBInterface> m_database;

	boost::asio::steady_timer m_removeGameTimer;
	boost::asio::steady_timer m_saveStatisticsTimer;
	boost::asio::steady_timer m_loginLockTimer;

	boost::uuids::random_generator m_sessionIdGenerator;

	const boost::posix_time::ptime m_startTime;

	friend class InternalServerCallback;
};

#endif