#pragma once

#ifndef SELECTIONTOOL_INCLUDED

#define SELECTIONTOOL_INCLUDED

#include "tproperty.h"

#include "toonzqt/selection.h"

#include "tools/toolutils.h"

#include "toonz/strokegenerator.h"

// For Qt translation support

#include <qcoreapplication></qcoreapplication>

#include <qset></qset>

class SelectionTool;

//=============================================================================

// Constants / Defines

//-----------------------------------------------------------------------------

enum SelectionType {

  RECT_SELECTION_IDX,

  FREEHAND_SELECTION_IDX,

  POLYLINE_SELECTION_IDX,

};

#define RECT_SELECTION L"Rectangular"

#define FREEHAND_SELECTION L"Freehand"

#define POLYLINE_SELECTION L"Polyline"

//=============================================================================

// FreeDeformer

//-----------------------------------------------------------------------------

class FreeDeformer {

protected:

  TPointD m_originalP00;

  TPointD m_originalP11;

  std::vector<tpointd> m_newPoints;</tpointd>

public:

  FreeDeformer() {}

  virtual ~FreeDeformer() {}

  /*! Set \b index point to \b p, with index from 0 to 3. */

  virtual void setPoint(int index, const TPointD &p) = 0;

  /*! Helper function. */

  virtual void setPoints(const TPointD &p0, const TPointD &p1,

                         const TPointD &p2, const TPointD &p3) = 0;

  virtual void deformImage() = 0;

};

//=============================================================================

// DragSelectionTool

//-----------------------------------------------------------------------------

namespace DragSelectionTool {

//-----------------------------------------------------------------------------

//=============================================================================

// FourPoints

//-----------------------------------------------------------------------------

class FourPoints {

  TPointD m_p00, m_p01, m_p10, m_p11;

public:

  FourPoints(TPointD p00, TPointD p01, TPointD p10, TPointD p11)

      : m_p00(p00), m_p01(p01), m_p10(p10), m_p11(p11) {}

  FourPoints()

      : m_p00(TPointD())

      , m_p01(TPointD())

      , m_p10(TPointD())

      , m_p11(TPointD()) {}

  void setP00(TPointD p) { m_p00 = p; }

  void setP01(TPointD p) { m_p01 = p; }

  void setP10(TPointD p) { m_p10 = p; }

  void setP11(TPointD p) { m_p11 = p; }

  TPointD getP00() const { return m_p00; }

  TPointD getP01() const { return m_p01; }

  TPointD getP10() const { return m_p10; }

  TPointD getP11() const { return m_p11; }

  /*! Order four point from BottomLeft to TopRight. */

  FourPoints orderedPoints() const;

  TPointD getBottomLeft() const { return orderedPoints().getP00(); }

  TPointD getBottomRight() const { return orderedPoints().getP10(); }

  TPointD getTopRight() const { return orderedPoints().getP11(); }

  TPointD getTopLeft() const { return orderedPoints().getP01(); }

  /*! Point = index: P00 =  0; P10 = 1; P11 = 2; P01 = 3; P0M = 4; P1M = 5; PM1

   * = 6; P0M = 7. */

  TPointD getPoint(int index) const;

  /*! Point = index: P00 =  0; P10 = 1; P11 = 2; P01 = 3. */

  void setPoint(int index, const TPointD &p);

  FourPoints enlarge(double d);

  bool isEmpty();

  void empty();

  bool contains(TPointD p);

  TRectD getBox() const;

  FourPoints &operator=(const TRectD &r);

  bool operator==(const FourPoints &p) const;

  FourPoints operator*(const TAffine &aff) const;

};

//=============================================================================

void drawFourPoints(const FourPoints &rect, const TPixel32 &color,

                    unsigned short stipple, bool doContrast);

//-----------------------------------------------------------------------------

//=============================================================================

// DeformValues

//-----------------------------------------------------------------------------

struct DeformValues {

  double m_rotationAngle, m_maxSelectionThickness;

  TPointD m_scaleValue, m_moveValue;

  bool m_isSelectionModified;

  DeformValues(double rotationAngle = 0, double maxSelectionThickness = 0,

               TPointD scaleValue = TPointD(1, 1),

               TPointD moveValue = TPointD(), bool isSelectionModified = false)

      : m_rotationAngle(rotationAngle)

      , m_maxSelectionThickness(maxSelectionThickness)

      , m_scaleValue(scaleValue)

      , m_moveValue(moveValue)

      , m_isSelectionModified(isSelectionModified) {}

  void reset() {

    m_rotationAngle         = 0;

    m_maxSelectionThickness = 0;

    m_scaleValue            = TPointD(1, 1);

    m_moveValue             = TPointD();

    m_isSelectionModified   = false;

  }

};

//=============================================================================

// DragTool

//-----------------------------------------------------------------------------

class DragTool {

protected:

  SelectionTool *m_tool;

public:

  DragTool(SelectionTool *tool) : m_tool(tool) {}

  virtual ~DragTool() {}

  SelectionTool *getTool() const { return m_tool; }

  virtual void transform(TAffine aff, double angle){}

  virtual void transform(TAffine aff){}

  virtual TPointD transform(int index, TPointD newPos) { return TPointD(); }

  virtual void addTransformUndo(){}

  virtual void leftButtonDown(const TPointD &pos, const TMouseEvent &) = 0;

  virtual void leftButtonDrag(const TPointD &pos, const TMouseEvent &) = 0;

  virtual void leftButtonUp(const TPointD &pos, const TMouseEvent &)   = 0;

  virtual void draw() = 0;

};

//=============================================================================

// DeformTool

//-----------------------------------------------------------------------------

class DeformTool : public DragTool {

protected:

  TPointD m_curPos;

  bool m_isDragging;

  TPointD m_startScaleValue;

  TPointD m_startPos;

public:

  DeformTool(SelectionTool *tool);

  virtual void applyTransform(FourPoints bbox) = 0;

  virtual void applyTransform(TAffine aff){};

  void addTransformUndo() override = 0;

  int getSymmetricPointIndex(int index) const;

  /*! Return before point \b index between possible point index

   * {0,4,1,5,2,6,3,7}, include middle point. */

  int getBeforePointIndex(int index) const;

  /*! Return next point \b index between possible point index {0,4,1,5,2,6,3,7},

   * include middle point. */

  int getNextPointIndex(int index) const;

  /*! Return before vertex \b index between possible point vertex index

   * {0,1,2,3}*/

  int getBeforeVertexIndex(int index) const;

  /*! Return next vertex \b index between possible point vertex index

   * {0,1,2,3}*/

  int getNextVertexIndex(int index) const;

  TPointD getStartPos() const { return m_startPos; }

  void setStartPos(const TPointD &pos) { m_startPos = pos; }

  TPointD getCurPos() const { return m_curPos; }

  void setCurPos(const TPointD &pos) { m_curPos = pos; }

  bool isDragging() const { return m_isDragging; }

  TPointD getStartScaleValue() const { return m_startScaleValue; }

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

  void leftButtonDrag(const TPointD &pos, const TMouseEvent &e) override = 0;

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

  void draw() override = 0;

};

//=============================================================================

// Rotation

//-----------------------------------------------------------------------------

class Rotation {

  double m_curAng, m_dstAng;

  DeformTool *m_deformTool;

public:

  Rotation(DeformTool *deformTool);

  TPointD getStartCenter() const;

  void leftButtonDrag(const TPointD &pos, const TMouseEvent &e);

  void draw();

};

//=============================================================================

// FreeDeform

//-----------------------------------------------------------------------------

class FreeDeform {

  DeformTool *m_deformTool;

public:

  FreeDeform(DeformTool *deformTool);

  void leftButtonDrag(const TPointD &pos, const TMouseEvent &e);

};

//=============================================================================

// MoveSelection

//-----------------------------------------------------------------------------

class MoveSelection {

  DeformTool *m_deformTool;

  TPointD m_lastDelta, m_firstPos;

public:

  MoveSelection(DeformTool *deformTool);

  void leftButtonDown(const TPointD &pos, const TMouseEvent &e);

  void leftButtonDrag(const TPointD &pos, const TMouseEvent &e);

};

//=============================================================================

// Scale

//-----------------------------------------------------------------------------

enum class ScaleType {

  GLOBAL = 0,

  HORIZONTAL,

  VERTICAL

};

class Scale {

  TPointD m_startCenter;

  bool m_isShiftPressed;

  bool m_isAltPressed;

  bool m_scaleInCenter;

  std::vector<fourpoints> m_startBboxs;</fourpoints>

  DeformTool *m_deformTool;

public:

  ScaleType m_type;

  Scale(DeformTool *deformTool, ScaleType type);

  /*! Return intersection between straight line in \b point0, \b point1 and

straight line for

\b p parallel to straight line in \b point2, \b point3. */

  TPointD getIntersectionPoint(const TPointD &point0, const TPointD &point1,

                               const TPointD &point2, const TPointD &point3,

                               const TPointD &p) const;

  /*! Scale \b index point of \b bbox in \b pos and return scaled bbox. */

  FourPoints bboxScale(int index, const FourPoints &oldBbox,

                       const TPointD &pos);

  /*! Compute new scale value take care of new position of \b movedIndex point

   * in \b bbox. */

  TPointD computeScaleValue(int movedIndex, const FourPoints newBbox);

  /*! Return \b index point scaled in \b center of \b scaleValue. */

  TPointD getScaledPoint(int index, const FourPoints &oldBbox,

                         const TPointD scaleValue, const TPointD center);

  /*! Compute new center after scale of \b bbox \b index point. */

  TPointD getNewCenter(int index, const FourPoints bbox,

                       const TPointD scaleValue);

  /*! Scale \b bbox \b index point in pos and if \b m_scaleInCenter is true

scale in \b center \b bbox symmetric point;

compute scaleValue. */

  FourPoints bboxScaleInCenter(int index, const FourPoints &oldBbox,

                               const TPointD newPos, TPointD &scaleValue,

                               const TPointD center, bool recomputeScaleValue);

  void leftButtonDown(const TPointD &pos, const TMouseEvent &e);

  void leftButtonDrag(const TPointD &pos, const TMouseEvent &e);

  std::vector<fourpoints> getStartBboxs() const { return m_startBboxs; }</fourpoints>

  TPointD getStartCenter() const { return m_startCenter; }

  bool scaleInCenter() const { return m_scaleInCenter; }

};

};

//=============================================================================

// Utility

//-----------------------------------------------------------------------------

DragSelectionTool::DragTool *createNewMoveSelectionTool(SelectionTool *st);

DragSelectionTool::DragTool *createNewRotationTool(SelectionTool *st);

DragSelectionTool::DragTool *createNewFreeDeformTool(SelectionTool *st);

DragSelectionTool::DragTool *createNewScaleTool(SelectionTool *st, DragSelectionTool::ScaleType type);

//=============================================================================

// SelectionTool

//-----------------------------------------------------------------------------

class SelectionTool : public TTool, public TSelection::View {

  Q_DECLARE_TR_FUNCTIONS(SelectionTool)

protected:

  bool m_firstTime;

  DragSelectionTool::DragTool *m_dragTool;

  StrokeGenerator m_track;

  std::vector<tpointd> m_polyline;</tpointd>

  TPointD m_mousePosition;

  TStroke *m_stroke;

  // To modify selection

  TPointD m_curPos;

  TPointD m_firstPos;

  bool m_selecting;

  bool m_justSelected;

  bool m_shiftPressed;

  enum {

    Outside,

    Inside,

    DEFORM,

    ROTATION,

    MOVE_CENTER,

    SCALE,

    SCALE_X,

    SCALE_Y,

    GLOBAL_THICKNESS,

    ADD_SELECTION

  } m_what;  // RV

  enum {

    P00 = 0,

    P10 = 1,

    P11 = 2,

    P01 = 3,

    PM0 = 4,

    P1M = 5,

    PM1 = 6,

    P0M = 7,

    NONE

  } m_selectedPoint;  // RV

  int m_cursorId;

  bool m_leftButtonMousePressed;

  DragSelectionTool::FourPoints m_selectingRect;

  std::vector<dragselectiontool::fourpoints> m_bboxs;</dragselectiontool::fourpoints>

  std::vector<tpointd> m_centers;</tpointd>

  std::vector<freedeformer *=""> m_freeDeformers;</freedeformer>

  TEnumProperty m_strokeSelectionType;

  TPropertyGroup m_prop;

  virtual void updateAction(TPointD pos, const TMouseEvent &e);

  virtual void modifySelectionOnClick(TImageP image, const TPointD &pos,

                                      const TMouseEvent &e) = 0;

  virtual void doOnActivate()   = 0;

  virtual void doOnDeactivate() = 0;

  // Metodi per disegnare la linea della selezione Freehand

  void startFreehand(const TPointD &pos);

  void freehandDrag(const TPointD &pos);

  void closeFreehand(const TPointD &pos);

  // Metodi per disegnare la linea della selezione Polyline

  void addPointPolyline(const TPointD &pos);

  void closePolyline(const TPointD &pos);

  void updateTranslation() override;

  void drawPolylineSelection();

  void drawRectSelection(const TImage *image);

  void drawFreehandSelection();

  void drawCommandHandle(const TImage *image);

public:

  DragSelectionTool::DeformValues m_deformValues;

  SelectionTool(int targetType);

  ~SelectionTool() override;

  ToolType getToolType() const override { return TTool::LevelWriteTool; }

  TPointD getCenter(int index = 0) const;

  void setCenter(const TPointD ¢er, int index = 0);

  int getBBoxsCount() const;

  DragSelectionTool::FourPoints getBBox(int index = 0) const;

  virtual void setBBox(const DragSelectionTool::FourPoints &points,

                       int index = 0);

  FreeDeformer *getFreeDeformer(int index = 0) const;

  virtual void setNewFreeDeformer()       = 0;

  void clearDeformers();

  int getSelectedPoint() const { return m_selectedPoint; }

  virtual bool isConstantThickness() const { return true; }

  virtual bool isLevelType() const { return false; }

  virtual bool isSelectedFramesType() const { return false; }

  virtual bool isSameStyleType() const { return false; }

  virtual bool isModifiableSelectionType() const {

    return !(isLevelType() || isSelectedFramesType());

  }

  virtual bool isFloating() const { return false; }

  virtual QSet<int> getSelectedStyles() const { return QSet<int>(); }</int></int>

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

  void leftButtonDrag(const TPointD &pos, const TMouseEvent &) override = 0;

  void leftButtonUp(const TPointD &pos, const TMouseEvent &) override   = 0;

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

  void leftButtonDoubleClick(const TPointD &,

                             const TMouseEvent &e) override = 0;

  bool keyDown(QKeyEvent *) override;

  int getCursorId() const override;

  void draw() override = 0;

  TSelection *getSelection() override = 0;

  virtual bool isSelectionEmpty()     = 0;

  virtual void computeBBox() = 0;

  void onActivate() override;

  void onDeactivate() override;

  void onImageChanged() override = 0;

  void onSelectionChanged() override;

  TPropertyGroup *getProperties(int targetType) override { return &m_prop; }

  bool onPropertyChanged(std::string propertyName) override;

  // returns true if the pressed key is recognized and processed.

  bool isEventAcceptable(QEvent *e) override;

  virtual bool isSelectionEditable() { return true; }

};

#endif  // SELECTIONTOOL_INCLUDED