/****************************************************************************
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****************************************************************************/

#ifndef __SPRITE_CCSPRITE_SHEET_H__
#define __SPRITE_CCSPRITE_SHEET_H__

#include "CCNode.h"
#include "CCProtocols.h"
#include "CCTextureAtlas.h"
#include "ccMacros.h"
#include "cocoa/NSMutableArray.h"


class CCSprite;
class CGRect;

/** CCSpriteSheet is like a batch node: if it contains children, it will draw them in 1 single OpenGL call
 * (often known as "batch draw").
 *
 * A CCSpriteSheet can reference one and only one texture (one image file, one texture atlas).
 * Only the CCSprites that are contained in that texture can be added to the CCSpriteSheet.
 * All CCSprites added to a CCSpriteSheet are drawn in one OpenGL ES draw call.
 * If the CCSprites are not added to a CCSpriteSheet then an OpenGL ES draw call will be needed for each one, which is less efficient.
 *
 *
 * Limitations:
 *  - The only object that is accepted as child (or grandchild) is CCSprite or any subclass of CCSprite. eg: particles, labels and layer can't be added to a CCSpriteSheet.
 *  - Either all its children are Aliased or Antialiased. It can't be a mix. This is because "alias" is a property of the texture, and all the sprites share the same texture.
 * 
 * @since v0.7.1
 */
class CCSpriteSheet : public CCNode, public CCTextureProtocol
{
public:
    ~CCSpriteSheet(void);

	/** initializes a CCSpriteSheet with a texture2d and capacity of children.
	 The capacity will be increased in 33% in runtime if it run out of space.
	 */
	CCSpriteSheet* initWithTexture(CCTexture2D *pobTexture, UINT32 uCapacity);

	/** initializes a CCSpriteSheet with a file image (.png, .jpeg, .pvr, etc) and a capacity of children.
	 The capacity will be increased in 33% in runtime if it run out of space.
	 The file will be loaded using the TextureMgr.
	 */
	CCSpriteSheet* initWithFile(const char *pszFileImage, UINT32 uCapacity);

	void increaseAtlasCapacity(void);

	/** creates an sprite with a rect in the CCSpriteSheet.
	 It's the same as:
	   - create an standard CCSsprite
	   - set the usingSpriteSheet = YES
	   - set the textureAtlas to the same texture Atlas as the CCSpriteSheet
	 @deprecated Use [CCSprite spriteWithSpriteSheet:rect] instead;
	 */
	CCSprite* createSpriteWithRect(CGRect rect);

	/** initializes a previously created sprite with a rect. This sprite will have the same texture as the CCSpriteSheet.
	 It's the same as:
	 - initialize an standard CCSsprite
	 - set the usingSpriteSheet = YES
	 - set the textureAtlas to the same texture Atlas as the CCSpriteSheet
	 @since v0.99.0
	 @deprecated Use [CCSprite initWithSpriteSheet:rect] instead;
	*/ 
	void initSprite(CCSprite* pobSprite, CGRect rect);

	/** removes a child given a certain index. It will also cleanup the running actions depending on the cleanup parameter.
	 @warning Removing a child from a CCSpriteSheet is very slow
	 */
	void removeChildAtIndex(UINT32 uIndex, bool bDoCleanup);

	/** removes a child given a reference. It will also cleanup the running actions depending on the cleanup parameter.
	 @warning Removing a child from a CCSpriteSheet is very slow
	 */
//	void removeChild(CCSprite *pobSprite, bool bDoCleanup);

	void insertChild(CCSprite *pobSprite, UINT32 uIndex);
	void removeSpriteFromAtlas(CCSprite *pobSprite);

	UINT32 rebuildIndexInOrder(CCSprite *pobParent, UINT32 uIndex);
	UINT32 atlasIndexForChild(CCSprite *pobSprite, INT32 nZ);
	unsigned int highestAtlasIndexInChild(CCSprite *pSprite);
	unsigned int lowestAtlasIndexInChild(CCSprite *pSprite);

	// CCTextureProtocol
	virtual CCTexture2D* getTexture(void);
	virtual void setTexture(CCTexture2D *texture);
	virtual void setBlendFunc(ccBlendFunc blendFunc);
	virtual ccBlendFunc getBlendFunc(void);

	virtual void visit(void);
	virtual CCNode * addChild(CCNode * child);
	virtual CCNode * addChild(CCNode * child, int zOrder);
	virtual CCNode * addChild(CCNode * child, int zOrder, int tag);
	virtual void reorderChild(CCNode * child, int zOrder);
	virtual void removeChild(CCNode* child, bool cleanup);
	virtual void removeAllChildrenWithCleanup(bool cleanup);
	virtual void draw(void);
public:
	/** creates a CCSpriteSheet with a texture2d and a default capacity of 29 children.
	 The capacity will be increased in 33% in runtime if it run out of space.
	 */
	static CCSpriteSheet* spriteSheetWithTexture(CCTexture2D *pobTexture);

	/** creates a CCSpriteSheet with a texture2d and capacity of children.
	 The capacity will be increased in 33% in runtime if it run out of space.
	 */
	static CCSpriteSheet* spriteSheetWithTexture(CCTexture2D *pobTexture, UINT32 uCapacity);

	/** creates a CCSpriteSheet with a file image (.png, .jpeg, .pvr, etc) with a default capacity of 29 children.
	 The capacity will be increased in 33% in runtime if it run out of space.
	 The file will be loaded using the TextureMgr.
	 */
	static CCSpriteSheet* spriteSheetWithFile(const char *pszFileImage);

	/** creates a CCSpriteSheet with a file image (.png, .jpeg, .pvr, etc) and capacity of children.
	 The capacity will be increased in 33% in runtime if it run out of space.
	 The file will be loaded using the TextureMgr.
	*/
	static CCSpriteSheet* spriteSheetWithFile(const char *pszFileImage, UINT32 uCapacity);

private:
	void updateBlendFunc(void);

public:
	// attributes

	// descendants (children, gran children, etc)
	inline NSArray<CCSprite*>* getDescendants(void) { return m_pobDescendants; }

	// TextureAtlas
	inline CCTextureAtlas* getTextureAtlas(void) { return m_pobTextureAtlas; }
	inline void setTextureAtlas(CCTextureAtlas *pTextureAtlas)
	{
		m_pobTextureAtlas = pTextureAtlas;
		if (pTextureAtlas)
		{
			pTextureAtlas->retain();
		}
	}

protected:
	CCTextureAtlas *m_pobTextureAtlas;
	ccBlendFunc m_blendFunc;

	// all descendants: chlidren, gran children, etc...
	NSArray<CCSprite*> *m_pobDescendants;
};

#endif // __SPRITE_CCSPRITE_SHEET_H__