#pragma once
#include <SDL.h>
#include "EngineFrame/Attribute/Y_Transform.h"
#include "EngineFrame/Attribute/Flag.h"
#include "math/Math.h"
#include "Tool/RefObject.h"
#include "Tool/RefPtr.h"
#include "Tool/IntrusiveList.hpp"

class Node : public RefObject, protected IntrusiveListValue<RefPtr<Node>>
{
public:
    typedef std::function<void(float deltaTime)> UpdateCallback;
    typedef IntrusiveList<RefPtr<Node>> NodeList;

    using IntrusiveListValue<RefPtr<Node>>::GetNext;
    using IntrusiveListValue<RefPtr<Node>>::GetPrev;

private:
    /**变换属性 */
    Y_Transform transform_;
    /**变换矩阵 */
    mutable Matrix3x2 transform_matrix_;
    mutable Matrix3x2 transform_matrix_inverse_;
    mutable Matrix3x2 transform_matrix_to_parent_;
    /**更新时的回调函数 */
    std::map<std::string, UpdateCallback> cb_update_;
    /**锚点 */
    glm::vec2 anchor_;
    /**Z轴显示层级 */
    int z_order_;
    /**大小 */
    VecSize size_;
    /**透明度 */
    float opacity_;

    /**是否可见 */
    bool visible_;
    /**是否暂停更新 */
    bool update_pausing_;
    /**是否显示边界 */
    bool show_border_;
    /**名称 */
    std::string name_;

    /**父对象 */
    Node *parent_;
    /**子对象链表 */
    NodeList children_;
    /**标志 */
    mutable Flag<uint8_t> dirty_flag_;

public:
    virtual void Init();
    virtual void HandleEvents(SDL_Event *e);
    virtual void Update(float deltaTime);
    virtual void PreRender();
    virtual void Render();
    virtual void Clear();

    void UpdateSelf(float dt);


public:
    /// \~chinese
    /// @brief 获取显示状态
    bool IsVisible() const;

    /// \~chinese
    /// @brief 获取 Z 轴顺序
    int GetZOrder() const;

    /// \~chinese
    /// @brief 获取坐标
    glm::vec2 GetPosition() const;

    /// \~chinese
    /// @brief 获取 x 坐标
    float GetPositionX() const;

    /// \~chinese
    /// @brief 获取 y 坐标
    float GetPositionY() const;

    /// \~chinese
    /// @brief 获取大小
    virtual VecSize GetSize() const;

    /// \~chinese
    /// @brief 获取宽度
    float GetWidth() const;

    /// \~chinese
    /// @brief 获取高度
    float GetHeight() const;

    /// \~chinese
    /// @brief 获取缩放后的宽度
    float GetScaledWidth() const;

    /// \~chinese
    /// @brief 获取缩放后的高度
    float GetScaledHeight() const;

    /// \~chinese
    /// @brief 获取缩放后的大小
    VecSize GetScaledSize() const;

    /// \~chinese
    /// @brief 获取锚点
    glm::vec2 GetAnchor() const;

    /// \~chinese
    /// @brief 获取 x 方向锚点
    float GetAnchorX() const;

    /// \~chinese
    /// @brief 获取 y 方向锚点
    float GetAnchorY() const;

    /// \~chinese
    /// @brief 获取透明度
    float GetOpacity() const;

    /// \~chinese
    /// @brief 获取旋转角度
    float GetRotation() const;

    /// \~chinese
    /// @brief 获取缩放比例
    glm::vec2 GetScale() const;

    /// \~chinese
    /// @brief 获取横向缩放比例
    float GetScaleX() const;

    /// \~chinese
    /// @brief 获取纵向缩放比例
    float GetScaleY() const;

    /// \~chinese
    /// @brief 获取错切角度
    glm::vec2 GetSkew() const;

    /// \~chinese
    /// @brief 获取横向错切角度
    float GetSkewX() const;

    /// \~chinese
    /// @brief 获取纵向错切角度
    float GetSkewY() const;

    /// \~chinese
    /// @brief 获取变换
    Y_Transform GetTransform() const;

    /// \~chinese
    /// @brief 获取父角色
    Node *GetParent() const;

    /// \~chinese
    /// @brief 设置角色是否可见
    void SetVisible(bool val);

    /// \~chinese
    /// @brief 设置名称
    void SetName(std::string name);

    /// \~chinese
    /// @brief 设置坐标
    void SetPosition(const glm::vec2 &pos);

    /// \~chinese
    /// @brief 设置坐标
    void SetPosition(float x, float y);

    /// \~chinese
    /// @brief 设置横坐标
    void SetPositionX(float x);

    /// \~chinese
    /// @brief 设置纵坐标
    void SetPositionY(float y);

    /// \~chinese
    /// @brief 移动至坐标
    void MoveTo(const glm::vec2 &p);

    /// \~chinese
    /// @brief 移动至坐标
    void MoveTo(float x, float y);

    /// \~chinese
    /// @brief 移动相对坐标
    void MoveBy(const glm::vec2 &trans);

    /// \~chinese
    /// @brief 移动相对坐标
    void MoveBy(float trans_x, float trans_y);

    /// \~chinese
    /// @brief 设置缩放比例，默认为 (1.0, 1.0)
    void SetScale(const glm::vec2 &scale);

    /// \~chinese
    /// @brief 设置缩放比例，默认为 (1.0, 1.0)
    void SetScale(float scalex, float scaley);

    /// \~chinese
    /// @brief 设置错切角度，默认为 (0, 0)
    void SetSkew(const glm::vec2 &skew);

    /// \~chinese
    /// @brief 设置错切角度，默认为 (0, 0)
    void SetSkew(float skewx, float skewy);

    /// \~chinese
    /// @brief 设置旋转角度，默认为 0
    void SetRotation(float rotation);

    /// \~chinese
    /// @brief 设置锚点位置，默认为 (0, 0), 范围 [0, 1]
    void SetAnchor(const glm::vec2 &anchor);

    /// \~chinese
    /// @brief 设置锚点位置，默认为 (0, 0), 范围 [0, 1]
    void SetAnchor(float anchorx, float anchory);

    /// \~chinese
    /// @brief 修改大小
    void SetSize(const VecSize &size);

    /// \~chinese
    /// @brief 修改大小
    void SetSize(float width, float height);

    /// \~chinese
    /// @brief 修改宽度
    void SetWidth(float width);

    /// \~chinese
    /// @brief 修改高度
    void SetHeight(float height);

    /// \~chinese
    /// @brief 设置透明度，默认为 1.0, 范围 [0, 1]
    void SetOpacity(float opacity);

    /// \~chinese
    /// @brief 设置二维仿射变换
    void SetTransform(const Y_Transform &transform);

    /// \~chinese
    /// @brief 设置 Z 轴顺序，默认为 0
    void SetZOrder(int zorder);

    /// \~chinese
    /// @brief 添加子角色
    void AddChild(RefPtr<Node> child);

    /// \~chinese
    /// @brief 获取全部子角色
    NodeList &GetAllChildren();

    /// \~chinese
    /// @brief 获取全部子角色
    const NodeList &GetAllChildren() const;

    /// \~chinese
    /// @brief 移除子角色
    void RemoveChild(RefPtr<Node> child);

    /// \~chinese
    /// @brief 移除所有节点
    void RemoveAllChildren();

    /// \~chinese
    /// @brief 从父角色移除
    void RemoveFromParent();

    /// \~chinese
    /// @brief 暂停角色更新
    void PauseUpdating();

    /// \~chinese
    /// @brief 继续角色更新
    void ResumeUpdating();

    /// \~chinese
    /// @brief 角色更新是否暂停
    bool IsUpdatePausing() const;

    /// \~chinese
    /// @brief 设置更新时的回调函数
    void SetCallbackOnUpdate(std::string Key, const UpdateCallback &cb);

    /// \~chinese
    /// @brief 移除更新时的回调函数
    void RemoveCallbackOnUpdate(std::string Key);

    /// \~chinese
    /// @brief 判断点是否在角色内
    virtual bool ContainsPoint(const glm::vec2 &point) const;

    /// \~chinese
    /// @brief 将世界坐标系点转换为局部坐标系点
    glm::vec2 ConvertToLocal(const glm::vec2 &point) const;

    /// \~chinese
    /// @brief 将局部坐标系点转换为世界坐标系点
    glm::vec2 ConvertToWorld(const glm::vec2 &point) const;

    /// \~chinese
    /// @brief 渲染角色边界
    void ShowBorder(bool show);


public:
    Node(/* args */);
    ~Node();

    /// \~chinese
    /// @brief 更新自己的二维变换，并通知所有子角色
    void UpdateTransform() const;

    /// \~chinese
    /// @brief 向上追溯更新
    /// @details 对于节点树 A->B(dirty)->C->D，当对 D 执行 UpdateTransformUpwards 时会对 B、C、D 从上到下依次更新
    void UpdateTransformUpwards() const;

    /// \~chinese
    /// @brief 获取二维变换矩阵
    const Matrix3x2 &GetTransformMatrix() const;

    /// \~chinese
    /// @brief 获取二维变换的逆矩阵
    const Matrix3x2 &GetTransformInverseMatrix() const;

    /// \~chinese
    /// @brief 获取变换到父角色的二维变换矩阵
    const Matrix3x2 &GetTransformMatrixToParent() const;

    /// \~chinese
    /// @brief 将所有子角色按Z轴顺序排序
    void Reorder();

    enum DirtyFlag : uint8_t
    {
        Clean = 0,
        DirtyTransform = 1,
        DirtyTransformInverse = 1 << 1,
        DirtyOpacity = 1 << 2,
        DirtyVisibility = 1 << 3
    };
};