////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2011, 2026
//
//    This file is part of Scorched3D.
//
//    Scorched3D is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D 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 General Public License for more details.
//
//    You should have received a copy of the GNU General Public License along
//    with this program; if not, write to the Free Software Foundation, Inc.,
//    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
////////////////////////////////////////////////////////////////////////////////

#ifndef __INCLUDE_ServerSyncCheck_hpp_INCLUDE__
#define __INCLUDE_ServerSyncCheck_hpp_INCLUDE__

#include <time.h>
#include <coms/ComsSyncCheckMessage.hpp>
#include <coms/ComsMessageHandler.hpp>
#include <map>
#include <set>

class ServerSyncCheck : public ComsMessageHandlerI
{
public:
	ServerSyncCheck( ComsMessageHandler& comsMessageHandler );
	virtual ~ServerSyncCheck();

	void enterState();
	void simulate();

	void addServerSyncCheck( ComsSyncCheckMessage* message );
	void sendAutoSyncCheck();
	void sendSyncCheck();
	void sentSyncCheck( unsigned int syncId );

	// Inherited from ComsMessageHandlerI
	virtual bool processMessage( NetMessage& message, const char* messageType, NetBufferReader& reader );

protected:
	static ServerSyncCheck* instance_;
	time_t                  lastTime_;

	struct SyncContext
	{
		SyncContext();
		~SyncContext();

		ComsSyncCheckMessage*                           serverMessage;
		std::map< unsigned int, ComsSyncCheckMessage* > clientMessages;
		std::set< unsigned int >                        clientDestinations;
	};

	std::map< unsigned int, SyncContext* > contexts_;

	bool checkContext( SyncContext* context );
	bool compareSyncChecks( ComsSyncCheckMessage* server, unsigned int destinationId, ComsSyncCheckMessage* client );
	bool compareHeightMaps(
		unsigned int destinationId,
		unsigned int syncId,
		const char*  mapName,
		NetBuffer&   serverBuffer,
		NetBuffer&   clientBuffer
	);
};

#endif  // __INCLUDE_ServerSyncCheck_hpp_INCLUDE__
