/*
   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_MODEL_H )
#define INCLUDED_MODEL_H

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

class EModel : public ModuleObserver
{
ResourceReference m_resource;
scene::Traversable& m_traverse;
scene::Node* m_node;
Callback<void()> m_modelChanged;

public:
EModel( scene::Traversable& traversable, const Callback<void()>& modelChanged )
	: m_resource( "" ), m_traverse( traversable ), m_node( 0 ), m_modelChanged( modelChanged ){
	m_resource.attach( *this );
}
~EModel(){
	m_resource.detach( *this );
}

void realise(){
	m_resource.get()->load();
	m_node = m_resource.get()->getNode();
	if ( m_node != 0 ) {
		m_traverse.insert( *m_node );
	}
}
void unrealise(){
	if ( m_node != 0 ) {
		m_traverse.erase( *m_node );
	}
}

void modelChanged( const char* value ){
	StringOutputStream cleaned( string_length( value ) );
	cleaned << PathCleaned( value );
	m_resource.detach( *this );
	m_resource.setName( cleaned.c_str() );
	m_resource.attach( *this );
	m_modelChanged();
}
typedef MemberCaller<EModel, void(const char*), &EModel::modelChanged> ModelChangedCaller;

const char* getName() const {
	return m_resource.getName();
}
scene::Node* getNode() const {
	return m_node;
}
};

class SingletonModel
{
TraversableNode m_traverse;
EModel m_model;
public:
SingletonModel()
	: m_model( m_traverse, Callback<void()>() ){
}

void attach( scene::Traversable::Observer* observer ){
	m_traverse.attach( observer );
}
void detach( scene::Traversable::Observer* observer ){
	m_traverse.detach( observer );
}

scene::Traversable& getTraversable(){
	return m_traverse;
}

void modelChanged( const char* value ){
	m_model.modelChanged( value );
}
typedef MemberCaller<SingletonModel, void(const char*), &SingletonModel::modelChanged> ModelChangedCaller;

scene::Node* getNode() const {
	return m_model.getNode();
}
};

#endif
