/****************************************************************************
 Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.

 http://www.cocos.com

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights to
 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 of the Software, and to permit persons to whom the Software is 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.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 THE SOFTWARE.
****************************************************************************/
#pragma once

#include "base/std/optional.h"
#include "core/TypedArray.h"
#include "math/Vec3.h"
#include "math/Vec4.h"
#include "renderer/gfx-base/GFXDef.h"

namespace cc {

/**
 * @en
 * The definition of the parameter for building a primitive geometry.
 * @zh
 * 几何体参数选项。
 */
struct IGeometryOptions {
    /**
     * @en
     * Whether to include normal. Default to true.
     * @zh
     * 是否包含法线。默认为true。
     */
    bool includeNormal{true};

    /**
     * @en
     * Whether to include uv. Default to true.
     * @zh
     * 是否包含UV。默认为true。
     */
    bool includeUV{true};
};

struct CustomAttribute {
    gfx::Attribute attr;
    ccstd::vector<float> values;
};

/**
 * @en
 * The definition of the geometry, this struct can build a mesh.
 * @zh
 * 几何体信息。
 */
struct IGeometry {
    /**
     * @en
     * Vertex positions.
     * @zh
     * 顶点位置。
     */
    ccstd::vector<float> positions;

    /**
     * @en
     * Vertex normals.
     * @zh
     * 顶点法线。
     */
    ccstd::optional<ccstd::vector<float>> normals;

    /**
     * @en
     * Texture coordinates.
     * @zh
     * 纹理坐标。
     */
    ccstd::optional<ccstd::vector<float>> uvs;

    /**
     * @en
     * Vertex Tangents.
     * @zh
     * 顶点切线。
     */
    ccstd::optional<ccstd::vector<float>> tangents;

    /**
     * @en
     * Vertex colors.
     * @zh
     * 顶点颜色。
     */
    ccstd::optional<ccstd::vector<float>> colors;

    /**
     * @en
     * specify vertex attributes, use (positions|normals|uvs|colors) as keys
     * @zh
     * 顶点属性。
     */
    ccstd::optional<gfx::AttributeList> attributes;

    /**
     * @en
     * Custom attributes
     * @zh
     * 定制属性列表。
     */
    ccstd::optional<ccstd::vector<CustomAttribute>> customAttributes;

    /**
     * @en
     * Bounding sphere radius.
     * @zh
     * 包围球半径。
     */
    ccstd::optional<float> boundingRadius;

    /**
     * @en
     * Min position.
     * @zh
     * 最小位置。
     */
    ccstd::optional<Vec3> minPos;

    /**
     * @en
     * Max position.
     * @zh
     * 最大位置。
     */
    ccstd::optional<Vec3> maxPos;

    /**
     * @en
     * Geometry indices, if one needs indexed-draw.
     * @zh
     * 几何索引，当使用索引绘制时。
     */
    ccstd::optional<ccstd::vector<uint32_t>> indices; //cjh uint16_t ?

    /**
     * @en
     * Topology of the geometry vertices. Default is TRIANGLE_LIST.
     * @zh
     * 几何顶点的拓扑图元。默认值是TRIANGLE_LIST。
     */
    ccstd::optional<gfx::PrimitiveMode> primitiveMode;

    /**
     * @en
     * whether rays casting from the back face of this geometry could collide with it
     * @zh
     * 是否是双面，用于判断来自于几何体背面的射线检测。
     */
    ccstd::optional<bool> doubleSided;
};

struct DynamicCustomAttribute {
    gfx::Attribute attr;
    Float32Array values;
};

/**
 * @en
 * The definition of the dynamic geometry, this struct can build a dynamic mesh.
 * @zh
 * 几何体信息。
 */
struct IDynamicGeometry {
    /**
     * @en
     * Vertex positions: 3 float components.
     * @zh
     * 顶点位置：3个float分量。
     */
    Float32Array positions;

    /**
     * @en
     * Vertex normals: 3 float components.
     * @zh
     * 顶点法线：3个float分量。
     */
    ccstd::optional<Float32Array> normals;

    /**
     * @en
     * Texture coordinates: 2 float components.
     * @zh
     * 纹理坐标：2个float分量。
     */
    ccstd::optional<Float32Array> uvs;

    /**
     * @en
     * Vertex Tangents: 4 float components.
     * @zh
     * 顶点切线：4个float分量。
     */
    ccstd::optional<Float32Array> tangents;

    /**
     * @en
     * Vertex colors: 4 float components.
     * @zh
     * 顶点颜色：4个float分量。
     */
    ccstd::optional<Float32Array> colors;

    /**
     * @en
     * Custom attributes
     * @zh
     * 定制属性列表。
     */
    ccstd::optional<ccstd::vector<DynamicCustomAttribute>> customAttributes;

    /**
     * @en
     * Min position, it is more efficient to calculate bounding box by user.
     * @zh
     * 最小位置。包围盒大小由用户提供，更高效。
     */
    ccstd::optional<Vec3> minPos;

    /**
     * @en
     * Max position, it is more efficient to calculate bounding box by user.
     * @zh
     * 最大位置。包围盒大小由用户提供，更高效。
     */
    ccstd::optional<Vec3> maxPos;

    /**
     * @en
     * 16 bits Geometry indices, if one needs indexed-draw.
     * @zh
     * 16位几何索引，当使用索引绘制时。
     */
    ccstd::optional<Uint16Array> indices16;

    /**
     * @en
     * 32 bits Geometry indices, if one needs indexed-draw.
     * @zh
     * 32位几何索引，当使用索引绘制时。
     */
    ccstd::optional<Uint32Array> indices32;

    /**
     * @en
     * Topology of the geometry vertices. Default is TRIANGLE_LIST.
     * @zh
     * 几何顶点的拓扑图元。默认值是TRIANGLE_LIST。
     */
    ccstd::optional<gfx::PrimitiveMode> primitiveMode;

    /**
     * @en
     * whether rays casting from the back face of this geometry could collide with it
     * @zh
     * 是否是双面，用于判断来自于几何体背面的射线检测。
     */
    ccstd::optional<bool> doubleSided;
};

} // namespace cc