////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2011, 2025, 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_MetaClass_hpp_INCLUDE__
#define __INCLUDE_MetaClass_hpp_INCLUDE__

#include <string>
#include <map>

#define REGISTER_CLASS_HEADER( x ) \
\
	class METAFACTORY_##x : public MetaClassFactory \
	{ \
		virtual MetaClass* getClassCopy() { return new x; } \
	}; \
	virtual const char* getClassName() \
	{ \
		return #x; \
	} \
	virtual unsigned int getMetaClassId() \
	{ \
		static unsigned int metaClassID = nextMetaClassId_++; \
		return metaClassID; \
	}

#define REGISTER_CLASS_SOURCE( x ) \
	struct META_##x \
	{ \
		META_##x() { MetaClassRegistration::addMap( #x, new x::METAFACTORY_##x ); } \
	}; \
	static META_##x META_IMPL_##x;

class MetaClass
{
public:
	MetaClass();
	virtual ~MetaClass();

	// Automatically given by the
	// REGISTER_CLASS_HEADER and
	// REGISTER_CLASS_SOURCE macros
	virtual unsigned int getMetaClassId() = 0;
	virtual const char*  getClassName()   = 0;

protected:
	static unsigned int nextMetaClassId_;
};

class MetaClassFactory
{
public:
	MetaClassFactory();
	virtual ~MetaClassFactory();

	// Automatically given by the
	// REGISTER_CLASS_HEADER and
	// REGISTER_CLASS_SOURCE macros
	virtual MetaClass* getClassCopy() = 0;
};

class MetaClassRegistration
{
public:
	static void                                        addMap( const char* name, MetaClassFactory* mclass );
	static std::map< std::string, MetaClassFactory* >* classMap;
	static MetaClass*                                  getNewClass( const char* name );
	static MetaClassFactory*                           getFactory( const char* name );
};

#endif  // __INCLUDE_MetaClass_hpp_INCLUDE__
