#ifndef _IRRLICHTENGINEMANAGER_H__
#define _IRRLICHTENGINEMANAGER_H__
 
#include <irrlicht.h>
 
/**
	A handy macro that allows us to access the IrrlichtEngineManager singelton instance
*/
#define ENGINEMANAGER IrrlichtEngineManager::Instance()
 
using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;
 
/**
	IrrlichtEngineManager is used to manage the Irrlicht 3D engine
*/
class IrrlichtEngineManager
{
public:
	/**
		Standard destructor
	*/
	~IrrlichtEngineManager();
	/**
		Returns a reference to the singelton object
	*/
	static IrrlichtEngineManager& Instance()
	{
		static IrrlichtEngineManager instance;
		return instance;
	}
	/**
		Initialises the resources needed for the Irrlicht3D engine
	*/
	void Startup();
	/**
		Cleans up the Irrlicht3D engine resources
	*/
	void Shutdown();
	/**
		Enters the render loop
	*/
	void StartRenderLoop();
	/**
		Stops the render loop
	*/
	void EndRenderLoop();
	/**
		@return The Irrlicht Scene Manager
	*/
	ISceneManager* GetSceneManager() const {return smgr;}
	/**
		@return The Irrlicht Device
	*/
	IrrlichtDevice* GetIrrlichtDevice() const {return device;}
	/**
		@return The video driver
	*/
	IVideoDriver* GetVideoDriver() const {return driver;}
	/**
		@return The GUI Environment
	*/
	IGUIEnvironment* GetGUIEnnvironment() const {return device->getGUIEnvironment();}
 
protected:
	/**
		Standard constructor
	*/
	IrrlichtEngineManager();
	/**
		Sets all the member variables to NULL. This is called both by the constructor
		and the Shutdown function.
	*/
	void InitialiseVariables();
	/// The Irrlicht3D Device
	IrrlichtDevice *device;
	/// The Irrlicht3D Video Driver
	IVideoDriver* driver;
	/// The Irrlicht3D Scene Manager
	ISceneManager* smgr;
};
 
#endif