#pragma once

#ifndef FUNCTION_SEGMENT_VIEWER_H

#define FUNCTION_SEGMENT_VIEWER_H

#include <qlabel></qlabel>

#include <qcombobox></qcombobox>

#include "tdoubleparam.h"

#include "toonzqt/lineedit.h"

#undef DVAPI

#undef DVVAR

#ifdef TOONZQT_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

class FunctionSegmentPage;

class FunctionSheet;

class TXsheetHandle;

class KeyframeSetter;

class FunctionPanel;

class QPushButton;

class QStackedWidget;

namespace DVGui {

class MeasuredDoubleLineEdit;

class ExpressionField;

}

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

class FunctionSegmentViewer final : public QFrame, public TParamObserver {

  Q_OBJECT

  TDoubleParam *m_curve;

  int m_segmentIndex;

  int m_r0, m_r1;

  QWidget *m_topbar;

  QLineEdit *m_fromFld;

  QLineEdit *m_toFld;

  QLabel *m_paramNameLabel;

  QComboBox *m_typeCombo;

  DVGui::LineEdit *m_stepFld;

  QStackedWidget *m_parametersPanel;

  FunctionSegmentPage *m_pages[9];

  int m_typeId[9];

  FunctionSheet *m_sheet;

  TXsheetHandle *m_xshHandle;

  FunctionPanel *m_panel;

  // buttons for move segments

  QPushButton *m_prevCurveButton;

  QPushButton *m_nextCurveButton;

  QPushButton *m_prevLinkButton;

  QPushButton *m_nextLinkButton;

public:

  FunctionSegmentViewer(QWidget *parent, FunctionSheet *sheet = 0,

                        FunctionPanel *panel = 0);

  ~FunctionSegmentViewer();

  TDoubleParam *getCurve() const { return m_curve; }

  int getR0() const { return m_r0; }

  int getR1() const { return m_r1; }

  int getSegmentIndex() const { return m_segmentIndex; }

  void refresh();

  // overriden from TDoubleParamObserver

  void onChange(const TParamChange &) override { refresh(); }

  void setXsheetHandle(TXsheetHandle *xshHandle) { m_xshHandle = xshHandle; }

  bool anyWidgetHasFocus();

  // in order to avoid FunctionViewer to get focus while editing the expression

  bool isExpressionPageActive();

private:

  int typeToIndex(int type) const;

  int indexToType(int typeIndex) const { return m_typeId[typeIndex]; }

  bool segmentIsValid() const;

  // for displaying the types of neighbor segments

  QString typeToString(int type) const;

private slots:

  void onSegmentTypeChanged(int type);

  void onCurveChanged();

  void onStepFieldChanged(const QString &);

  void onApplyButtonPressed();

  void onPrevCurveButtonPressed();

  void onNextCurveButtonPressed();

  void onPrevLinkButtonPressed();

  void onNextLinkButtonPressed();

public slots:

  void setSegment(TDoubleParam *curve, int segmentIndex);

  void setSegmentByFrame(TDoubleParam *curve, int frame);

};

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

class FunctionSegmentPage : public QWidget {

  Q_OBJECT

  FunctionSegmentViewer *m_viewer;

public:

  FunctionSegmentPage(FunctionSegmentViewer *parent);

  ~FunctionSegmentPage();

  FunctionSegmentViewer *getViewer() const { return m_viewer; }

  TDoubleParam *getCurve() const { return m_viewer->getCurve(); }

  int getR0() const { return m_viewer->getR0(); }

  int getR1() const { return m_viewer->getR1(); }

  virtual void refresh() = 0;

  virtual void apply()   = 0;

  virtual void init(int segmentLength) = 0;

public slots:

  void onFieldChanged() { apply(); }

};

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

class SpeedInOutSegmentPage final : public FunctionSegmentPage {

  Q_OBJECT

  DVGui::LineEdit *m_speed0xFld;

  DVGui::MeasuredDoubleLineEdit *m_speed0yFld;

  DVGui::LineEdit *m_speed1xFld;

  DVGui::MeasuredDoubleLineEdit *m_speed1yFld;

  DVGui::MeasuredDoubleLineEdit *m_firstSpeedFld;

  DVGui::MeasuredDoubleLineEdit *m_lastSpeedFld;

public:

  SpeedInOutSegmentPage(FunctionSegmentViewer *parent = 0);

  void refresh() override;

  void apply() override{};

  void getGuiValues(TPointD &speedIn, TPointD &speedOut);

  void init(int segmentLength) override;

public slots:

  void onFirstHandleXChanged();

  void onFirstHandleYChanged();

  void onLastHandleXChanged();

  void onLastHandleYChanged();

  void onFirstSpeedChanged();

  void onLastSpeedChanged();

};

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

class EaseInOutSegmentPage final : public FunctionSegmentPage {

  Q_OBJECT

  DVGui::MeasuredDoubleLineEdit *m_ease0Fld, *m_ease1Fld;

  double m_fieldScale;

  bool m_isPercentage;

public:

  EaseInOutSegmentPage(bool percentage, FunctionSegmentViewer *parent = 0);

  void refresh() override;

  void apply() override {}

  void getGuiValues(TPointD &easeIn, TPointD &easeOut);

  void init(int segmentLength) override;

public slots:

  void onEase0Changed();

  void onEase1Changed();

};

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

class FunctionExpressionSegmentPage final : public FunctionSegmentPage {

  Q_OBJECT

  DVGui::ExpressionField *m_expressionFld;

  DVGui::LineEdit *m_unitFld;

public:

  FunctionExpressionSegmentPage(FunctionSegmentViewer *parent = 0);

  void refresh() override;

  void apply() override;

  // return false if a circular reference is occured

  bool getGuiValues(std::string &expressionText, std::string &unitName);

  void init(int segmentLength) override;

};

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

class SimilarShapeSegmentPage final : public FunctionSegmentPage {

  Q_OBJECT

  DVGui::ExpressionField *m_expressionFld;

  DVGui::LineEdit *m_offsetFld;

public:

  SimilarShapeSegmentPage(FunctionSegmentViewer *parent = 0);

  void refresh() override;

  void apply() override;

  void init(int segmentLength) override;

  void getGuiValues(std::string &expressionText, double &similarShapeOffset);

};

#endif