/****************************************************************************
 Copyright (c) 2020-2023 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,
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 THE SOFTWARE.
****************************************************************************/

#pragma once

#include "Define.h"
#include "base/std/container/array.h"

namespace cc {
class Mat4;
namespace scene {
class Camera;
class Shadows;
class DirectionalLight;
class RenderScene;
} // namespace scene
namespace pipeline {
class RenderPipeline;
class GlobalDSManager;
class CC_DLL PipelineUBO final {
public:
    static void updateGlobalUBOView(const scene::Camera *camera, ccstd::array<float, UBOGlobal::COUNT> *bufferView);
    static void updateCameraUBOView(const RenderPipeline *pipeline, float *output, const scene::Camera *camera);
    static void updateCameraUBOView(const RenderPipeline *pipeline, float *output, const scene::Camera *camera, const scene::RenderScene *renderScene);
    static void updateShadowUBOView(const RenderPipeline *pipeline, ccstd::array<float, UBOShadow::COUNT> *shadowBufferView,
                                    ccstd::array<float, UBOCSM::COUNT> *csmBufferView, const scene::Camera *camera);
    static void updateShadowUBOLightView(const RenderPipeline *pipeline, ccstd::array<float, UBOShadow::COUNT> *shadowBufferView,
                                         const scene::Light *light, uint32_t level);
    static uint8_t getCombineSignY();
    static void updatePlanarNormalAndDistance(const ::cc::scene::Shadows *shadowInfo, ccstd::array<float, UBOShadow::COUNT> *shadowUBO);

    PipelineUBO() = default;
    ~PipelineUBO() = default;
    void activate(gfx::Device *device, RenderPipeline *pipeline);
    void destroy();
    void updateGlobalUBO(const scene::Camera *camera);
    void updateCameraUBO(const scene::Camera *camera);
    void updateCameraUBO(const scene::Camera *camera, const scene::RenderScene *scene);
    void updateMultiCameraUBO(GlobalDSManager *globalDSMgr, const ccstd::vector<scene::Camera *> &cameras);
    void updateShadowUBO(const scene::Camera *camera);
    void updateShadowUBOLight(gfx::DescriptorSet *globalDS, const scene::Light *light, uint32_t level = 0U);
    void updateShadowUBORange(uint32_t offset, const Mat4 *data);

    uint32_t getCurrentCameraUBOOffset() const;
    void incCameraUBOOffset();

private:
    static float getPCFRadius(const scene::Shadows *shadowInfo, const scene::DirectionalLight *dirLight);
    void initCombineSignY() const;
    void resizeCameraBuffer(uint32_t totalSize);

    // weak reference
    RenderPipeline *_pipeline{nullptr};
    // weak reference
    gfx::Device *_device{nullptr};
    // weak reference, it is recorded in _ubos
    gfx::Buffer *_cameraBuffer{nullptr};
    gfx::Buffer *_cameraBufferView{nullptr};

    uint32_t _currentCameraUBOOffset{0};
    uint32_t _alignedCameraUBOSize{0};

    bool _shadowUBOUpdated{false};

    ccstd::array<float, UBOGlobal::COUNT> _globalUBO;
    ccstd::array<float, UBOShadow::COUNT> _shadowUBO;
    ccstd::array<float, UBOCSM::COUNT> _csmUBO;

    // manage memory manually
    ccstd::vector<gfx::Buffer *> _ubos;
    ccstd::vector<float> _cameraUBOs;
};

} // namespace pipeline
} // namespace cc