/*!
 * \file include/Mesh.h
 * \brief OpenGL Mesh
 *
 * \author Mongoose
 *
 * \todo Unify the parallel systems here, arrays and the allocate/set
 */

#ifndef _MESH_H_
#define _MESH_H_

/*!
 * \brief OpenGL Mesh
 */
class Mesh {
public:

    typedef enum {
        MeshModeSolid,
        MeshModeWireframe,
        MeshModeTexture,
        MeshModeMultiTexture
    } MeshMode;

    typedef enum {
        fMesh_UseVertexArray = (1 << 0)
    } MeshFlags;

    typedef struct {
        int texture;
#ifdef MULTITEXTURE
        int bumpmap;
#endif

        unsigned int cnum_triangles;
        unsigned int cnum_alpha_triangles;

        unsigned int num_texcoors;
        float **texcoors; // 2D

        unsigned int num_texcoors2;
        float **texcoors2; // 2D

        //! Arrays of triangle indices sorted by texture
        unsigned int num_triangles;
        unsigned int *triangles; //!< ABCABCABC...

        //! Arrays of alpha triangle indices sorted by texture
        unsigned int num_alpha_triangles;
        unsigned int *alpha_triangles; //!< ABCABCABC...
    } tris_t;

    typedef struct {

        int texture;
#ifdef MULTITEXTURE
        int bumpmap;
#endif

        unsigned int cnum_quads;
        unsigned int cnum_alpha_quads;

        unsigned int num_texcoors;
        float **texcoors; // 2D

        unsigned int num_texcoors2;
        float **texcoors2; // 2D

        //! Arrays of rectangle indices sorted by texture
        unsigned int num_quads;
        unsigned int *quads; //!< ABCDABCDABCD...

        //! Arrays of alpha rectangle indices sorted by texture
        unsigned int num_alpha_quads;
        unsigned int *alpha_quads; //!< ABCDABCDABCD...

    } rect_t;

    /*!
     * \brief Constructs an object of Mesh
     */
    Mesh();

    /*!
     * \brief Deconstructs an object of Mesh
     */
    ~Mesh();

    void drawAlpha();

    void drawSolid();

    void allocateColors(unsigned int n);

    void allocateNormals(unsigned int n);

    void allocateRectangles(unsigned int n);

    void allocateTriangles(unsigned int n);

    void allocateVertices(unsigned int n);

    void bufferColorArray(unsigned int colorCount, float *colors);

    void bufferNormalArray(unsigned int normalCount, float *normals);

    void bufferTriangles(unsigned int count,
                            unsigned int *indices, float *texCoords,
                            int *textures, unsigned int *flags);

    void bufferVertexArray(unsigned int vertexCount, float *vertices);

    void setColor(unsigned int index, float r, float g, float b, float a);

    void setColor(unsigned int index, float rgba[4]);

    void setNormal(unsigned int index, float i, float j, float k);

    void setVertex(unsigned int index, float x, float y, float z);

#ifdef NOT_IMPLEMENTED
    void sortFacesByTexture();

    void addFace(int textureIndex, int textureIndexB, unsigned int flags,
                    unsigned int vertexIndexCount, float *vertexIndices);

    void addTexTiledFace(int textureIndex, int textureIndexB,
                            unsigned int flags, unsigned int indexCount,
                            float *vertexIndices, float *texcoords);

    void bufferTexcoords(unsigned int texcoordCount, float *texcoords);

    void duplicateArraysForTexTiledTexcoords();
#endif

    unsigned int mFlags;

    MeshMode mMode;

    unsigned int mNumVertices;
    float **mVertices; //!< XYZ

    unsigned int mNumNormals;
    float **mNormals; //!< IJK

    unsigned int mNumColors;
    float **mColors; //!< RGBA

    unsigned int mNumTris;
    tris_t *mTris;

    unsigned int mNumQuads;
    rect_t *mQuads;

    unsigned int mTriangleCount;
    int *mTriangleTextures;
    unsigned int *mTriangleIndices;
    unsigned int *mTriangleFlags;
    float *mTriangleTexCoordArray;

    float *mVertexArray;
    float *mNormalArray;
    float *mColorArray;
};

#endif