/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant 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.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_MODELSKINKEY_H )
#define INCLUDED_MODELSKINKEY_H

#include "modelskin.h"

#include "os/path.h"
#include "stream/stringstream.h"
#include "moduleobserver.h"
#include "entitylib.h"
#include "traverselib.h"

inline void parseTextureName( CopiedString& name, const char* token ){
	StringOutputStream cleaned( 256 );
	cleaned << PathCleaned( token );
	name = StringRange( cleaned.c_str(), path_get_filename_base_end( cleaned.c_str() ) ); // remove extension
}

class ModelSkinKey : public ModuleObserver
{
CopiedString m_name;
ModelSkin* m_skin;
Callback<void()> m_skinChangedCallback;

ModelSkinKey( const ModelSkinKey& );
ModelSkinKey operator=( const ModelSkinKey& );

void construct(){
	m_skin = &GlobalModelSkinCache().capture( m_name.c_str() );
	m_skin->attach( *this );
}
void destroy(){
	m_skin->detach( *this );
	GlobalModelSkinCache().release( m_name.c_str() );
}

public:
ModelSkinKey( const Callback<void()>& skinChangedCallback ) : m_skinChangedCallback( skinChangedCallback ){
	construct();
}
~ModelSkinKey(){
	destroy();
}
ModelSkin& get() const {
	return *m_skin;
}
void skinChanged( const char* value ){
	destroy();
	parseTextureName( m_name, value );
	construct();
}
typedef MemberCaller<ModelSkinKey, void(const char*), &ModelSkinKey::skinChanged> SkinChangedCaller;

void realise(){
	m_skinChangedCallback();
}
void unrealise(){
}
};

class InstanceSkinChanged : public scene::Instantiable::Visitor
{
public:
void visit( scene::Instance& instance ) const {
	//\todo don't do this for instances that are not children of the entity setting the skin
	SkinnedModel* skinned = InstanceTypeCast<SkinnedModel>::cast( instance );
	if ( skinned != 0 ) {
		skinned->skinChanged();
	}
}
};

inline void Node_modelSkinChanged( scene::Node& node ){
	scene::Instantiable* instantiable = Node_getInstantiable( node );
	ASSERT_NOTNULL( instantiable );
	instantiable->forEachInstance( InstanceSkinChanged() );
}

#endif
