////////////////////////////////////////////////////////////////////////////////
//    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_ObjectGroupEntry_hpp_INCLUDE__
#define __INCLUDE_ObjectGroupEntry_hpp_INCLUDE__

#include <common/FixedVector.hpp>
#include <set>

class ObjectGroupEntryReference;
class ObjectGroup;
class ObjectGroups;
class NamedNetBuffer;
class NetBufferReader;

class ObjectGroupEntry
{
public:
	enum ObjectType
	{
		TypeTarget,
		TypeParticle
	};

	ObjectGroupEntry( ObjectGroups& groups );
	virtual ~ObjectGroupEntry();

	std::set< ObjectGroup* >& getAllGroups() { return containment_; }

	void removeFromAllGroups();

	virtual ObjectGroupEntry::ObjectType getType()   = 0;
	virtual void*                        getObject() = 0;

	virtual FixedVector& getPosition() = 0;
	virtual FixedVector& getVelocity() = 0;
	virtual unsigned int getPlayerId() = 0;

	virtual bool writeMessage( NamedNetBuffer& buffer );
	virtual bool readMessage( NetBufferReader& reader );

private:
	friend class ObjectGroup;
	friend class ObjectGroupEntryReference;

	void addToGroup( ObjectGroup* group );
	void removeFromGroup( ObjectGroup* group );

protected:
	ObjectGroups&                          groups_;
	std::set< ObjectGroup* >               containment_;
	std::set< ObjectGroupEntryReference* > references_;
};

class ObjectGroupEntryReference
{
public:
	ObjectGroupEntryReference( ObjectGroupEntry* entry ) : entry_( entry )
	{
		if ( entry_ ) entry_->references_.insert( this );
	}

	virtual ~ObjectGroupEntryReference()
	{
		if ( entry_ ) entry_->references_.erase( this );
		entry_ = nullptr;
	}

	ObjectGroupEntry* getEntry() { return entry_; }

	void clearEntry() { entry_ = nullptr; }

protected:
	ObjectGroupEntry* entry_;
};

#endif  // __INCLUDE_ObjectGroupEntry_hpp_INCLUDE__
