/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2011      Zynga Inc.
Copyright (c) 2013-2014 Chukong Technologies Inc.

http://www.cocos2d-x.org

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of this software and associated documentation files (the "Software"), to deal
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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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****************************************************************************/
#ifndef __CC_FAST_TMX_LAYER_H__
#define __CC_FAST_TMX_LAYER_H__

#include <map>
#include <unordered_map>
#include "2d/CCNode.h"
#include "2d/CCTMXXMLParser.h"
#include "renderer/CCPrimitiveCommand.h"
#include "base/CCMap.h"

NS_CC_BEGIN

class TMXMapInfo;
class TMXLayerInfo;
class TMXTilesetInfo;
class Texture2D;
class Sprite;
struct _ccCArray;

namespace experimental{

/**
 * @addtogroup _2d
 * @{
 */

/** @brief FastTMXLayer represents the TMX layer.

 * It is a subclass of SpriteBatchNode. By default the tiles are rendered using a TextureAtlas.
 * If you modify a tile on runtime, then, that tile will become a Sprite, otherwise no Sprite objects are created.
 * The benefits of using Sprite objects as tiles are:
 * - tiles (Sprite) can be rotated/scaled/moved with a nice API.

 * If the layer contains a property named "cc_vertexz" with an integer (in can be positive or negative),
 * then all the tiles belonging to the layer will use that value as their OpenGL vertex Z for depth.

 * On the other hand, if the "cc_vertexz" property has the "automatic" value, then the tiles will use an automatic vertex Z value.
 * Also before drawing the tiles, GL_ALPHA_TEST will be enabled, and disabled after drawing them. The used alpha func will be:

 * glAlphaFunc( GL_GREATER, value ).

 * "value" by default is 0, but you can change it from Tiled by adding the "cc_alpha_func" property to the layer.
 * The value 0 should work for most cases, but if you have tiles that are semi-transparent, then you might want to use a different
 * value, like 0.5.
 
 * For further information, please see the programming guide:
 * http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:tiled_maps
 
 * @since v3.2
 * @js NA
 */

class CC_DLL TMXLayer : public Node
{
public:
    /** Creates a FastTMXLayer with an tileset info, a layer info and a map info.
     *
     * @param tilesetInfo An tileset info.
     * @param layerInfo A layer info.
     * @param mapInfo A map info.
     * @return Reruen an autorelease object.
     */
    static TMXLayer * create(TMXTilesetInfo *tilesetInfo, TMXLayerInfo *layerInfo, TMXMapInfo *mapInfo);
    /**
     * @js ctor
     */
    TMXLayer();
    /**
     * @js NA
     * @lua NA
     */
    virtual ~TMXLayer();

    /** Returns the tile gid at a given tile coordinate. It also returns the tile flags.
     * 
     * @param tileCoordinate The tile coordinate.
     * @param flags A TMXTileFlags.
     * @return The tile gid at a given tile coordinate. It also returns the tile flags.
     */
    int getTileGIDAt(const Vec2& tileCoordinate, TMXTileFlags* flags = nullptr);

    /** Sets the tile gid (gid = tile global id) at a given tile coordinate.
     * The Tile GID can be obtained by using the method "tileGIDAt" or by using the TMX editor -> Tileset Mgr +1.
     * If a tile is already placed at that position, then it will be removed.
     * @param gid The gid value.
     * @param tileCoordinate The tile coordinate.
     */
    void setTileGID(int gid, const Vec2& tileCoordinate);

    /** Sets the tile gid (gid = tile global id) at a given tile coordinate.
     * The Tile GID can be obtained by using the method "tileGIDAt" or by using the TMX editor -> Tileset Mgr +1.
     * If a tile is already placed at that position, then it will be removed.
     * Use withFlags if the tile flags need to be changed as well.
     *
     * @param gid A integer value,it will be sets the tile gid.
     * @param tileCoordinate The tile coordinate.
     * @param flags A TMXTileFlags.
     */
    void setTileGID(int gid, const Vec2& tileCoordinate, TMXTileFlags flags);

    /** Removes a tile at given tile coordinate.
     *
     * @param tileCoordinate The tile Coordinate.
     */
    void removeTileAt(const Vec2& tileCoordinate);

    /** Returns the position in points of a given tile coordinate.
     *
     * @param tileCoordinate The tile Coordinate.
     * @return The position in points of a given tile coordinate.
     */
    Vec2 getPositionAt(const Vec2& tileCoordinate);

    /** Return the value for the specific property name.
     *
     * @param propertyName The value for the specific property name.
     * @return The value for the specific property name.
     */
    Value getProperty(const std::string& propertyName) const;

    /** Creates the tiles. */
    void setupTiles();
    
    /** Get the tile layer name.
     *
     * @return The tile layer name.
     */
    inline const std::string& getLayerName(){ return _layerName; }
    
    /** Set the tile layer name.
     *
     * @param layerName The new layer name.
     */
    inline void setLayerName(const std::string& layerName){ _layerName = layerName; }

    /** Size of the layer in tiles.
     *
     * @return Size of the layer in tiles.
     */
    inline const Size& getLayerSize() const { return _layerSize; };
    
    /** Set the size of the layer in tiles. 
     *
     * @param size The new size of the layer in tiles.
     */
    inline void setLayerSize(const Size& size) { _layerSize = size; };
    
    /** Size of the map's tile (could be different from the tile's size).
     *
     * @return Size of the map's tile (could be different from the tile's size).
     */
    inline const Size& getMapTileSize() const { return _mapTileSize; };
    
    /** Set the size of the map's tile. 
     *
     * @param size The new size of the map's tile.
     */
    inline void setMapTileSize(const Size& size) { _mapTileSize = size; };
    
    /** Pointer to the map of tiles.
     * @js NA
     * @lua NA
     * @return The pointer to the map of tiles.
     */
    const uint32_t* getTiles() const { return _tiles; };
    
    /** Set the pointer to the map of tiles.
     *
     * @param tiles The pointer to the map of tiles.
     */
    void setTiles(uint32_t* tiles) { _tiles = tiles; _quadsDirty = true;};
    
    /** Tileset information for the layer.
     *
     * @return Tileset information for the layer.
     */
    inline TMXTilesetInfo* getTileSet() const { return _tileSet; };
    
    /** Set the tileset information for the layer. 
     *
     * @param info The new tileset information for the layer.
     */
    inline void setTileSet(TMXTilesetInfo* info) {
        CC_SAFE_RETAIN(info);
        CC_SAFE_RELEASE(_tileSet);
        _tileSet = info;
    };
    
    /** Layer orientation, which is the same as the map orientation.
     *
     * @return Layer orientation, which is the same as the map orientation.
     */
    inline int getLayerOrientation() const { return _layerOrientation; };
    
    /** Set Layer orientation, which is the same as the map orientation. 
     *
     * @param orientation Layer orientation, which is the same as the map orientation.
     */
    inline void setLayerOrientation(int orientation) { _layerOrientation = orientation; };
    
    /** Properties from the layer. They can be added using Tiled. 
     *
     * @return Properties from the layer. They can be added using Tiled.
     */
    inline const ValueMap& getProperties() const { return _properties; };
    
    /** Properties from the layer. They can be added using Tiled.
     *
     * @return Properties from the layer. They can be added using Tiled.
     */
    inline ValueMap& getProperties() { return _properties; };
    
    /** Set the properties to the layer.
     *
     * @param properties The properties to the layer.
     */
    inline void setProperties(const ValueMap& properties)
    {
        _properties = properties;
    };

    /** Returns the tile (Sprite) at a given a tile coordinate.
     * The returned Sprite will be already added to the TMXLayer. Don't add it again.
     * The Sprite can be treated like any other Sprite: rotated, scaled, translated, opacity, color, etc.
     * You can remove either by calling:
     * - layer->removeChild(sprite, cleanup);
     *
     * @return Returns the tile (Sprite) at a given a tile coordinate.
     */
    Sprite* getTileAt(const Vec2& tileCoordinate);
    
    /** Set an sprite to the tile,with the tile coordinate and gid.
     *
     * @param sprite A Sprite.
     * @param pos The tile coordinate.
     * @param gid The tile gid.
     */
    void setupTileSprite(Sprite* sprite, Vec2 pos, int gid);

    //
    // Override
    //
    virtual std::string getDescription() const override;
    virtual void draw(Renderer *renderer, const Mat4& transform, uint32_t flags) override;
    void removeChild(Node* child, bool cleanup = true) override;

protected:

    bool initWithTilesetInfo(TMXTilesetInfo *tilesetInfo, TMXLayerInfo *layerInfo, TMXMapInfo *mapInfo);
    void updateTiles(const Rect& culledRect);
    Vec2 calculateLayerOffset(const Vec2& offset);

    /* The layer recognizes some special properties, like cc_vertez */
    void parseInternalProperties();
    
    Mat4 tileToNodeTransform();
    Rect tileBoundsForClipTransform(const Mat4 &tileToClip);
    
    int getVertexZForPos(const Vec2& pos);
    
    //Flip flags is packed into gid
    void setFlaggedTileGIDByIndex(int index, int gid);
    
    //
    void updateTotalQuads();
    
    void onDraw(Primitive* primitive);
    inline int getTileIndexByPos(int x, int y) const { return x + y * (int) _layerSize.width; }
    
    void updateVertexBuffer();
    void updateIndexBuffer();
    void updatePrimitives();
protected:
    
    //! name of the layer
    std::string _layerName;

    /** size of the layer in tiles */
    Size _layerSize;
    /** size of the map's tile (could be different from the tile's size) */
    Size _mapTileSize;
    /** pointer to the map of tiles */
    uint32_t* _tiles;
    /** Tileset information for the layer */
    TMXTilesetInfo* _tileSet;
    /** Layer orientation, which is the same as the map orientation */
    int _layerOrientation;
    /** properties from the layer. They can be added using Tiled */
    ValueMap _properties;

    Texture2D *_texture;
    
    /** container for sprite children. map<index, pair<sprite, gid> > */
    std::map<int, std::pair<Sprite*, int> > _spriteContainer;

    //GLuint _buffersVBO; //0: vertex, 1: indices

    Size _screenGridSize;
    Rect _screenGridRect;
    int _screenTileCount;
    
    int _vertexZvalue;
    bool _useAutomaticVertexZ;
    
    /** tile coordinate to node coordinate transform */
    Mat4 _tileToNodeTransform;
    /** data for rendering */
    bool _quadsDirty;
    std::vector<int> _tileToQuadIndex;
    std::vector<V3F_C4B_T2F_Quad> _totalQuads;
    std::vector<GLushort> _indices;
    std::map<int/*vertexZ*/, int/*offset to _indices by quads*/> _indicesVertexZOffsets;
    std::unordered_map<int/*vertexZ*/, int/*number to quads*/> _indicesVertexZNumber;
    std::vector<PrimitiveCommand> _renderCommands;
    bool _dirty;
    
    VertexBuffer* _vertexBuffer;
    
    VertexData* _vData;
    
    IndexBuffer* _indexBuffer;
    
    Map<int , Primitive*> _primitives;
    
public:
    /** Possible orientations of the TMX map */
    static const int FAST_TMX_ORIENTATION_ORTHO;
    static const int FAST_TMX_ORIENTATION_HEX;
    static const int FAST_TMX_ORIENTATION_ISO;
};

// end of tilemap_parallax_nodes group
/// @}
} //end of namespace experimental
NS_CC_END

#endif //__CCTMX_LAYER2_H__
