#pragma once

#include "base/Macros.h"
#include "math/Math.h"

#include <unordered_map>
#include <vector>

namespace ax
{

namespace shaderinfos
{
enum class VertexKey : int
{

    /**Index 0 will be used as Position.*/
    VERTEX_ATTRIB_POSITION = 0,
    /**Index 1 will be used as Color.*/
    VERTEX_ATTRIB_COLOR = 1,
    /**Index 2 will be used as Tex coord unit 0.*/
    VERTEX_ATTRIB_TEX_COORD = 2,
    /**Index 3 will be used as Tex coord unit 1.*/
    VERTEX_ATTRIB_TEX_COORD1 = 3,
    /**Index 4 will be used as Tex coord unit 2.*/
    VERTEX_ATTRIB_TEX_COORD2 = 4,
    /**Index 5 will be used as Tex coord unit 3.*/
    VERTEX_ATTRIB_TEX_COORD3 = 5,
    /**Index 6 will be used as Normal.*/
    VERTEX_ATTRIB_NORMAL = 6,
    /**Index 7 will be used as Blend weight for hardware skin.*/
    VERTEX_ATTRIB_BLEND_WEIGHT = 7,
    /**Index 8 will be used as Blend index.*/
    VERTEX_ATTRIB_BLEND_INDEX = 8,
    /**Index 9 will be used as tangent.*/
    VERTEX_ATTRIB_TANGENT = 9,
    /**Index 10 will be used as Binormal.*/
    VERTEX_ATTRIB_BINORMAL = 10,
    VERTEX_ATTRIB_MAX      = 11,

    // backward compatibility
    VERTEX_ATTRIB_TEX_COORDS = VERTEX_ATTRIB_TEX_COORD,

    VERTEX_ATTRIB_ERROR = -1
};

/**Preallocated uniform handle.*/
enum class Uniformkey
{
    /**Ambient color.*/
    UNIFORM_AMBIENT_COLOR,
    /**Projection matrix.*/
    UNIFORM_P_MATRIX,
    /**MultiView Projection matrix.*/
    UNIFORM_MULTIVIEW_P_MATRIX,
    /**Model view matrix.*/
    UNIFORM_MV_MATRIX,
    /**Model view projection matrix.*/
    UNIFORM_MVP_MATRIX,
    /**MultiView Model view projection matrix.*/
    UNIFORM_MULTIVIEW_MVP_MATRIX,
    /**Normal matrix.*/
    UNIFORM_NORMAL_MATRIX,
    /**Time.*/
    UNIFORM_TIME,
    /**sin(Time).*/
    UNIFORM_SIN_TIME,
    /**cos(Time).*/
    UNIFORM_COS_TIME,
    /**Random number.*/
    UNIFORM_RANDOM01,
    /** @{
     * Sampler 0-3, used for texture.
     */
    UNIFORM_SAMPLER0,
    UNIFORM_SAMPLER1,
    UNIFORM_SAMPLER2,
    UNIFORM_SAMPLER3,
    /**@}*/
    UNIFORM_MAX,
};

namespace shader
{

extern const char* SHADER_NAME_ETC1AS_POSITION_TEXTURE_COLOR;
extern const char* SHADER_NAME_ETC1AS_POSITION_TEXTURE_COLOR_NO_MVP;

extern const char* SHADER_NAME_ETC1AS_POSITION_TEXTURE_GRAY;
extern const char* SHADER_NAME_ETC1AS_POSITION_TEXTURE_GRAY_NO_MVP;

/**Built in shader for 2d. Support Position, Texture and Color vertex attribute.*/
extern const char* SHADER_NAME_POSITION_TEXTURE_COLOR;
/**Built in shader for 2d. Support Position, Texture and Color vertex attribute, but without multiply vertex by MVP
 * matrix.*/
extern const char* SHADER_NAME_POSITION_TEXTURE_COLOR_NO_MVP;
/**Built in shader for 2d. Support Position, Texture vertex attribute, but include alpha test.*/
extern const char* SHADER_NAME_POSITION_TEXTURE_ALPHA_TEST;
/**Built in shader for 2d. Support Position, Texture and Color vertex attribute, include alpha test and without multiply
 * vertex by MVP matrix.*/
extern const char* SHADER_NAME_POSITION_TEXTURE_ALPHA_TEST_NO_MV;
/**Built in shader for 2d. Support Position, Color vertex attribute.*/
extern const char* SHADER_NAME_POSITION_COLOR;
/**Built in shader for 2d. Support Position, Color, Texture vertex attribute. texture coordinate will used as point
 * size.*/
extern const char* SHADER_NAME_POSITION_COLOR_TEXASPOINTSIZE;
/**Built in shader for 2d. Support Position, Color vertex attribute, without multiply vertex by MVP matrix.*/
extern const char* SHADER_NAME_POSITION_COLOR_NO_MVP;
/**Built in shader for 2d. Support Position, Texture vertex attribute.*/
extern const char* SHADER_NAME_POSITION_TEXTURE;
/**Built in shader for 2d. Support Position, Texture vertex attribute. with a specified uniform as color*/
extern const char* SHADER_NAME_POSITION_TEXTURE_U_COLOR;
/**Built in shader for 2d. Support Position, Texture and Color vertex attribute. but alpha will be the multiplication of
 * color attribute and texture.*/
extern const char* SHADER_NAME_POSITION_TEXTURE_A8_COLOR;
/**Built in shader for 2d. Support Position, with color specified by a uniform.*/
extern const char* SHADER_NAME_POSITION_U_COLOR;
/**Built in shader for draw a sector with 90 degrees with center at bottom left point.*/
extern const char* SHADER_NAME_POSITION_LENGTH_TEXTURE_COLOR;

/**Built in shader for ui effects */
extern const char* SHADER_NAME_POSITION_GRAYSCALE;
/** @{
Built in shader for label and label with effects.
*/
extern const char* SHADER_NAME_LABEL_NORMAL;
extern const char* SHADER_NAME_LABEL_OUTLINE;
extern const char* SHADER_NAME_LABEL_DISTANCEFIELD_NORMAL;
extern const char* SHADER_NAME_LABEL_DISTANCEFIELD_GLOW;

/**Built in shader used for 3D, support Position vertex attribute, with color specified by a uniform.*/
extern const char* SHADER_3D_POSITION;
/**Built in shader used for 3D, support Position and Texture vertex attribute, with color specified by a uniform.*/
extern const char* SHADER_3D_POSITION_TEXTURE;
/**
Built in shader used for 3D, support Position (Skeletal animation by hardware skin) and Texture vertex attribute,
with color specified by a uniform.
*/
extern const char* SHADER_3D_SKINPOSITION_TEXTURE;
/**
Built in shader used for 3D, support Position and Normal vertex attribute, used in lighting. with color specified by a
uniform.
*/
extern const char* SHADER_3D_POSITION_NORMAL;
/**
Built in shader used for 3D, support Position, Normal, Texture vertex attribute, used in lighting. with color specified
by a uniform.
*/
extern const char* SHADER_3D_POSITION_NORMAL_TEXTURE;
/**
Built in shader used for 3D, support Position(skeletal animation by hardware skin), Normal, Texture vertex attribute,
used in lighting. with color specified by a uniform.
*/
extern const char* SHADER_3D_SKINPOSITION_NORMAL_TEXTURE;
/**
Built in shader used for 3D, support Position, Bumped Normal, Texture vertex attribute, used in lighting. with color
specified by a uniform.
*/
extern const char* SHADER_3D_POSITION_BUMPEDNORMAL_TEXTURE;
/**
Built in shader used for 3D, support Position(skeletal animation by hardware skin), Bumped Normal, Texture vertex
attribute, used in lighting. with color specified by a uniform.
*/
extern const char* SHADER_3D_SKINPOSITION_BUMPEDNORMAL_TEXTURE;
/**
Built in shader for particles, support Position and Texture, with a color specified by a uniform.
*/
extern const char* SHADER_3D_PARTICLE_TEXTURE;
/**
Built in shader for particles, support Position, with a color specified by a uniform.
*/
extern const char* SHADER_3D_PARTICLE_COLOR;

/**
Built in shader for skybox
*/
extern const char* SHADER_3D_SKYBOX;

/**
Built in shader for terrain
*/
extern const char* SHADER_3D_TERRAIN;

/**
Built in shader for LayerRadialGradient
*/
extern const char* SHADER_LAYER_RADIAL_GRADIENT;

/**
Built in shader for camera clear
*/
extern const char* SHADER_CAMERA_CLEAR;
/**
end of built shader types.
@}
*/
}  // namespace shader

namespace uniform
{
/**
@name Built uniform names
@{
*/
/**Ambient Color uniform.*/
extern const char* UNIFORM_NAME_AMBIENT_COLOR;
/**Projection Matrix uniform.*/
extern const char* UNIFORM_NAME_P_MATRIX;
/**MultiView Projection Matrix uniform.*/
extern const char* UNIFORM_NAME_MULTIVIEW_P_MATRIX;
/**Model view matrix uniform.*/
extern const char* UNIFORM_NAME_MV_MATRIX;
/**Model view projection uniform.*/
extern const char* UNIFORM_NAME_MVP_MATRIX;
/**MultiView Model view projection uniform.*/
extern const char* UNIFORM_NAME_MULTIVIEW_MVP_MATRIX;
/**Normal matrix uniform.*/
extern const char* UNIFORM_NAME_NORMAL_MATRIX;
/**Time uniform.*/
extern const char* UNIFORM_NAME_TIME;
/**Sin time uniform.*/
extern const char* UNIFORM_NAME_SIN_TIME;
/**Cos time uniform.*/
extern const char* UNIFORM_NAME_COS_TIME;
/**Random number uniform.*/
extern const char* UNIFORM_NAME_RANDOM01;
/**
@{ Sampler uniform 0-3, used for textures.
*/
extern const char* UNIFORM_NAME_SAMPLER0;
extern const char* UNIFORM_NAME_SAMPLER1;
extern const char* UNIFORM_NAME_SAMPLER2;
extern const char* UNIFORM_NAME_SAMPLER3;
/**
@}
*/
/**Alpha test value uniform.*/
extern const char* UNIFORM_NAME_ALPHA_TEST_VALUE;
/**
end of Built uniform names
@}
*/
}  // namespace uniform

namespace attribute
{
/**
@name Built Attribute names
@{
*/
/**Attribute color.*/
extern const char* ATTRIBUTE_NAME_COLOR;
/**Attribute position.*/
extern const char* ATTRIBUTE_NAME_POSITION;
/**@{ Attribute Texcoord 0-3.*/
extern const char* ATTRIBUTE_NAME_TEX_COORD;
extern const char* ATTRIBUTE_NAME_TEX_COORD1;
extern const char* ATTRIBUTE_NAME_TEX_COORD2;
extern const char* ATTRIBUTE_NAME_TEX_COORD3;
/**@}*/
/**Attribute normal.*/
extern const char* ATTRIBUTE_NAME_NORMAL;
/**Attribute blend weight.*/
extern const char* ATTRIBUTE_NAME_BLEND_WEIGHT;
/**Attribute blend index.*/
extern const char* ATTRIBUTE_NAME_BLEND_INDEX;
/**Attribute blend tangent.*/
extern const char* ATTRIBUTE_NAME_TANGENT;
/**Attribute blend binormal.*/
extern const char* ATTRIBUTE_NAME_BINORMAL;
/**
end of Built Attribute names
@}
*/
}  // namespace attribute

const std::vector<std::pair<const char*, VertexKey>>& getPredefinedAttributes();
const std::string getAttributeName(const VertexKey& key);
};  // namespace shaderinfos

}