#pragma once

#include "tools/tool.h"

class ShiftTraceTool final : public TTool {

public:

  enum CurveStatus {

    NoCurve,

    TwoPointsCurve,  // just during the first click&drag

    ThreePointsCurve

  };

  enum GadgetId {

    NoGadget,

    NoGadget_InBox,

    CurveP0Gadget,

    CurveP1Gadget,

    CurvePmGadget,

    MoveCenterGadget,

    RotateGadget,

    TranslateGadget,

    ScaleGadget

  };

  inline bool isCurveGadget(GadgetId id) const {

    return CurveP0Gadget <= id && id <= CurvePmGadget;

  }

private:

  TPointD m_oldPos, m_startPos;

  int m_ghostIndex;

  TPointD m_p0, m_p1, m_p2;

  CurveStatus m_curveStatus;

  GadgetId m_gadget;

  GadgetId m_highlightedGadget;

  TRectD m_box;

  TAffine m_dpiAff;

  int m_row[2];

  TAffine m_aff[2];

  TPointD m_center[2];

  TAffine m_oldAff;

public:

  ShiftTraceTool();

  ToolType getToolType() const override { return GenericTool; }

  void clearData();

  void updateData();

  void updateBox();

  void updateCurveAffs();

  void updateGhost();

  void reset() override;

  void mouseMove(const TPointD &, const TMouseEvent &e) override;

  void leftButtonDown(const TPointD &, const TMouseEvent &) override;

  void leftButtonDrag(const TPointD &, const TMouseEvent &) override;

  void leftButtonUp(const TPointD &, const TMouseEvent &) override;

  void draw() override;

  TAffine getGhostAff();

  GadgetId getGadget(const TPointD &);

  void drawDot(const TPointD ¢er, double r,

               const TPixel32 &color = TPixel32::White);

  void drawControlRect();

  void drawCurve();

  void onActivate() override;

  void onDeactivate() override;

  void onLeave() override;

  bool isEventAcceptable(QEvent *e) override;

  int getCursorId() const override;

  int getCurrentGhostIndex() { return m_ghostIndex; }

  void setCurrentGhostIndex(int index);

};