/*****************************************************************************
 * PokerTH - The open source texas holdem engine                             *
 * Copyright (C) 2006-2016 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.                                              *
 *****************************************************************************/
/* Server database thread. */

#ifndef _SERVERDBTHREAD_H_
#define _SERVERDBTHREAD_H_

#include <boost/asio.hpp>
#include <boost/interprocess/sync/interprocess_semaphore.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <queue>
#include <db/serverdbinterface.h>
#include <db/serverdbcallback.h>
#include <dbofficial/dbidmanager.h>
#include <core/thread.h>

struct DBConnectionData;
class AsyncDBQuery;

class ServerDBThread : public ServerDBInterface, public Thread, public boost::enable_shared_from_this<ServerDBThread>
{
public:
	ServerDBThread(ServerDBCallback &cb, boost::shared_ptr<boost::asio::io_service> ioService);
	virtual ~ServerDBThread();

	virtual void SignalTermination();

	virtual void Init(const std::string &host, const std::string &user, const std::string &pwd,
					  const std::string &database, const std::string &encryptionKey);

	virtual void Start();
	virtual void Stop();

	virtual void AsyncPlayerLogin(unsigned requestId, const std::string &playerName);
	virtual void AsyncCheckAvatarBlacklist(unsigned requestId, const std::string &avatarHash);
	virtual void PlayerPostLogin(DB_id playerId, const std::string &avatarHash, const std::string &avatarType);
	virtual void PlayerLogout(DB_id playerId);

	virtual void AsyncCreateGame(unsigned requestId, const std::string &gameName);
	virtual void SetGamePlayerPlace(unsigned requestId, DB_id playerId, unsigned place);
	virtual void EndGame(unsigned requestId);

	virtual void AsyncReportAvatar(unsigned requestId, unsigned replyId, DB_id reportedPlayerId, const std::string &avatarHash, const std::string &avatarType, DB_id *byPlayerId);
	virtual void AsyncReportGame(unsigned requestId, unsigned replyId, DB_id *creatorPlayerId, unsigned gameId, const std::string &gameName, DB_id *byPlayerId);

	virtual void AsyncQueryAdminPlayers(unsigned requestId);
	virtual void AsyncBlockPlayer(unsigned requestId, unsigned replyId, DB_id playerId, int valid, int active);

	bool IsConnected() const;

protected:
	typedef std::queue<boost::shared_ptr<AsyncDBQuery> > AsyncDBQueryQueue;

	// Main function of the thread.
	virtual void Main();

	bool HasPermanentError() const;
	bool HasDBConnection() const;
	void EstablishDBConnection();
	void HandleNextQuery();

	void SetConnected(bool isConnected);
private:

	boost::shared_ptr<boost::asio::io_service> m_ioService;
	boost::interprocess::interprocess_semaphore m_semaphore;
	ServerDBCallback &m_callback;
	boost::shared_ptr<DBConnectionData> m_connData;
	mutable boost::mutex m_asyncQueueMutex;
	AsyncDBQueryQueue m_asyncQueue;
	DBIdManager m_dbIdManager;

	mutable boost::mutex m_isConnectedMutex;
	bool m_isConnected;
	bool m_permanentError;
	bool m_previouslyConnected;
};

#endif