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/********************************************************************
*
*	Created:	20/3/2014   11:09
*
*	File:		fsCParticleEmitter.h
*
*	Author:		Mick Waites
*	
*	Purpose:	Emits, updates and renders particles.
*
*********************************************************************/

#ifndef fsCParticleEmitterhdr
#define fsCParticleEmitterhdr

#include <vector>
#include <functional>
#include <memory>

#include <fsCore/fsPoint.h>
#include <fsCore/fsRect.h>
#include <fsCore/fsStr.h>

#include "../../fsIRenderable.h"
#include "fsCParticleDataInstance.h"

class fsCParticleData;
class fsIParticle;
class fsCResourceName;
class fsCEntity;
class fsIScene;
class fsCSprite;
class fsINative;
class fsIRenderableComponent;
class fsAffineMtx2d;
class fsCParticleCloud;


class fsCParticleEmitter : public fsIRenderable
{
public:

	const fsStr& collectableTypeGet() const;

	void particleCloudRegister(fsIParticleCloud* pSpawnCloud);

	fsS32 remainingParticleCountGet() const;
	fsBool collectableGet() const;
	fsS32 photoScoreGet(const fsRect& pScreenRect) const;
	fsBool hitTestAndCollect(const fsPoint& pPointerPos, std::function<void(fsIParticle* pParticle)> pCallBack);
	fsBool hitTest(const fsPoint& pPointerPos);

	void shortCircuit();

	fsBool preRunable() const;
	void preRun();

	void particleEmitterParentEntSet(fsCEntity* pParent);

	fsBool runsForeverGet() const;

	void spawnPositionUpdate(const fsPoint& pPos);
	void update(fsS32 pDeltaMs);

	fsBool particlesLinkToEmitterGet() const;

	fsBool isActiveGet() const;
	fsS32 numLiveParticlesGet() const;

    void initialise();
	fsCParticleEmitter(fsCParticleDataInstance pParticleData);
	virtual ~fsCParticleEmitter();<--- Destructor in derived class

protected:

	void matrixApplyDo(const fsAffineMtx2d& pRenderMatrix) override;
	void renderDo() override;

private:

	void particlesUpdate(fsS32 pTimeDelta);
	void emptySlotsFill(fsS32 pTimeDelta);


	fsBool mStarted;

	fsF32 mParticleToEmitNow;
	fsS32 mElapsedTimeMs;
	fsS32 mNumLiveParticles;

	fsS32 mCollectableParticleCount;
	fsPoint mSpawnPosition;

	fsCEntity* mParent;

	fsIParticle* mHitTestParticle;
	fsCParticleDataInstance mParticleData;

	std::vector<std::unique_ptr<fsIParticle>> mParticles;
};

#endif