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

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 of this software and associated documentation files (the "Software"), to deal
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 all copies or substantial portions of the Software.

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#pragma once

#include "base/Macros.h"
#include "base/Ptr.h"
#include "base/RefVector.h"
#include "base/std/optional.h"
#include "renderer/gfx-base/GFXDef-common.h"

namespace cc {
namespace scene {
class Camera;

struct IRenderWindowInfo {
    ccstd::optional<ccstd::string> title;
    uint32_t width{0};
    uint32_t height{0};
    gfx::RenderPassInfo renderPassInfo;
    gfx::Swapchain *swapchain{nullptr};
    ccstd::optional<uint32_t> externalResLow{0};                              // for vulkan vkImage/opengl es texture created from external
    ccstd::optional<uint32_t> externalResHigh{0};                             // for vulkan vkImage created from external
    ccstd::optional<gfx::TextureFlags> externalFlag{gfx::TextureFlags::NONE}; // external texture type normal or oes
};

/**
 * @en The render window represents the render target, it could be an off screen frame buffer or the on screen buffer.
 * @zh 渲染窗口代表了一个渲染目标，可以是离屏的帧缓冲，也可以是屏幕缓冲
 */
class RenderWindow : public RefCounted {
public:
    RenderWindow();
    ~RenderWindow() override;

    bool initialize(gfx::Device *device, IRenderWindowInfo &info);
    void destroy();

    /**
     * @en Resize window.
     * @zh 重置窗口大小。
     * @param width The new width.
     * @param height The new height.
     */
    void resize(uint32_t width, uint32_t height);

    void extractRenderCameras(ccstd::vector<Camera *> &cameras);

    void onNativeWindowDestroy(uint32_t windowId);
    void onNativeWindowResume(uint32_t windowId);

    /**
     * @zh
     * 添加渲染相机
     * @param camera 渲染相机
     */
    void attachCamera(Camera *camera);

    /**
     * @zh
     * 移除渲染相机
     * @param camera 相机
     */
    void detachCamera(Camera *camera);

    /**
     * @zh
     * 销毁全部渲染相机
     */
    void clearCameras();

    void sortCameras();

    /**
     * @en Get window width. Pre-rotated (i.e. rotationally invariant, always in identity/portrait mode) if possible.
     * If you want to get oriented size instead, you should use [[Camera.width]] which corresponds to the current screen rotation.
     * @zh 获取窗口宽度。如果支持交换链预变换，返回值将始终处于单位旋转（竖屏）坐标系下。如果需要获取旋转后的尺寸，请使用 [[Camera.width]]。
     */
    inline uint32_t getWidth() const { return _width; }

    /**
     * @en Get window height. Pre-rotated (i.e. rotationally invariant, always in identity/portrait mode) if possible.
     * If you want to get oriented size instead, you should use [[Camera.width]] which corresponds to the current screen rotation.
     * @zh 获取窗口高度。如果支持交换链预变换，返回值将始终处于单位旋转（竖屏）坐标系下。如果需要获取旋转后的尺寸，请使用 [[Camera.height]]。
     */
    inline uint32_t getHeight() const { return _height; }

    /**
     * @en Get the swapchain for this window, if there is one
     * @zh 如果存在的话，获取此窗口的交换链
     */
    inline gfx::Swapchain *getSwapchain() {
        return _swapchain;
    }

    /**
     * @en Get window frame buffer.
     * @zh 帧缓冲对象。
     */
    inline gfx::Framebuffer *getFramebuffer() const { return _frameBuffer.get(); }

    inline const ccstd::vector<IntrusivePtr<Camera>> &getCameras() const { return _cameras; }

private:
    void generateFrameBuffer();

    uint32_t _width{1};
    uint32_t _height{1};
    gfx::Swapchain *_swapchain{nullptr};
    ccstd::string _title;
    IntrusivePtr<gfx::RenderPass> _renderPass;
    IntrusivePtr<gfx::Texture> _depthStencilTexture;
    IntrusivePtr<gfx::Framebuffer> _frameBuffer;
    ccstd::vector<IntrusivePtr<Camera>> _cameras;
    RefVector<gfx::Texture *> _colorTextures;

    CC_DISALLOW_COPY_MOVE_ASSIGN(RenderWindow);
};

} // namespace scene
} // namespace cc