#pragma once

#ifndef TDOUBLEKEYFRAME_INCLUDED

#define TDOUBLEKEYFRAME_INCLUDED

#include "tgeometry.h"

#include "tfilepath.h"

#undef DVAPI

#undef DVVAR

#ifdef TPARAM_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

class TOStream;

class TIStream;

class TUnit;

class DVAPI TDoubleKeyframe {

public:

  enum Type {

    None = 0,

    Constant,

    Linear,

    SpeedInOut,

    EaseInOut,

    EaseInOutPercentage,

    Exponential,

    Expression,

    File,

    SimilarShape

  };

  class DVAPI FileParams {

  public:

    TFilePath m_path;

    int m_fieldIndex;

    FileParams() : m_path(), m_fieldIndex(0) {}

  };

  static inline bool isKeyframeBased(int type) {

    return type < TDoubleKeyframe::Expression &&

           type != TDoubleKeyframe::SimilarShape;

  }

  // private:

  Type m_type;

  Type m_prevType;

  double m_frame;

  double m_value;

  bool m_isKeyframe;

  int m_step;

  TPointD m_speedIn, m_speedOut;

  bool m_linkedHandles;

  std::string m_expressionText;

  FileParams m_fileParams;

  std::string m_unitName;  // file/expression only

  double m_similarShapeOffset;

  void saveData(TOStream &os) const;

  void loadData(TIStream &is);

public:

  TDoubleKeyframe(double frame = 0, double value = 0);

  ~TDoubleKeyframe();

  bool operator<(const TDoubleKeyframe &k) const { return m_frame < k.m_frame; }

};

#endif