#ifndef TRANSPARENTDRAGGABLECRACKOBJECT_H
#define TRANSPARENTDRAGGABLECRACKOBJECT_H

#include <QObject>
#include <QPointer>
#include <QVector>
#include "qcustomplot.h"

#pragma execution_character_set("utf-8")

class TransparentDraggableCrackObject : public QObject
{
    Q_OBJECT
public:
    enum CurveType { TYPE_A, TYPE_B, TYPE_C };

    explicit TransparentDraggableCrackObject(QCustomPlot *parentPlot,
                                              const QString &strUuid, double depth, QString type, QString showNames);
    ~TransparentDraggableCrackObject();

    bool m_isShow = false;
    QString m_typeName;
    void isShow(bool is);
protected:
    bool eventFilter(QObject *obj, QEvent *event) override;

private:
    QCustomPlot *mPlot;
    CurveType m_type;
    QString m_uuid;
    double m_depth;
    double m_endX;
    QColor m_lineColor;

    static QPointer<TransparentDraggableCrackObject> s_activeObject;

    QCPItemText *m_itemText;
    // 模式A
    QCPItemCurve *mCurve;
    double m_orig_x1, m_orig_x2;
    double m_orig_y1, m_orig_y2;
    double m_orig_startX, m_orig_endX;
    double m_orig_startDirX, m_orig_startDirY;
    double m_orig_endDirX, m_orig_endDirY;
    double m_offsetXA, m_offsetYA;
    QCPItemTracer *m_tracer1, *m_tracer2;
    enum DragStateA { IdleA, DraggingPoint1, DraggingPoint2, DraggingCurveA };
    DragStateA m_dragStateA;
    QPointF m_lastDragPixelA;

    // 模式B
    struct LineItem {
        QPointF startOrig;
        QPointF endOrig;
        QCPItemLine *line;
        QCPItemTracer *startTracer;
        QCPItemTracer *endTracer;
    };
    QVector<LineItem> m_lines;
    bool m_isAddingLine;
    QPointF m_tempPoint;
    double m_offsetXB, m_offsetYB;
    enum DragStateB { IdleB, DraggingLineOverall, DraggingStartPoint, DraggingEndPoint };
    DragStateB m_dragStateB;
    QPointF m_bDragStart;
    int m_draggedLineIndex;

    // 模式C
    QCPCurve *m_curveC;
    QVector<QPointF> m_pointsC;          // 原始点（无偏移）
    QVector<QCPItemText*> m_labelsC;     // 序号标签
    double m_offsetXC, m_offsetYC;       // 整体偏移
    bool m_cFinished;                    // 是否已完成选点
    bool m_cDragging;                    // 是否正在拖拽整体
    bool m_draggingPoint;                // 是否正在拖拽点
    int m_draggedPointIndex;             // 拖拽的点的索引
    QPointF m_cDragStart;                // 拖拽起始像素

    void updateCurveFromTargets();
    void updateCurvePosition();
    void updateTracers();
    void setTracerHighlight(QCPItemTracer *tracer, bool highlight);
    void updateLinesPosition();
    void clearLines();
    void updateLineEndpoints(LineItem &item);
    void updatePolylineC(bool closed);
    void clearPolylineC();
    void deactivate();
};

#endif