#ifndef POINTCALCULATE_H
#define POINTCALCULATE_H

#include <QPointF>

#include "filemanager.h"

namespace PointCalculate{
void setExperimentData(const QVector<Global::ExperimentData>&);

QPair<QPointF,QPointF> getStartAndEndPoint();
QVector<Global::ExperimentData> getDataInXRange(const float, const float);
QVector<QPointF> getPointVtrInXRange(const float, const float);

void setRegionPointX(const float,const float);

QPointF getClosestPointByX(const float);
QVector<QPointF> getNearbyPointGroupByX(const float);

QPointF getClosestPointByY(const float left,const float right,const float valueY);
QPointF getPeakPoint();
QPair<float, float>  getMaxMinValue();

QPair<QPointF,QPointF> calculateStartAndEndPoint();
float calculateArea();

// text format
QString textFormatPeakPoint(const float enthalpyValue,
                            const float peakValue,
                            const float startPoint,
                            const float endPoint);
QString textFormatNumbericalLabel(const QPointF);
QString textFormatStartPoint(const QPointF);
QString textFormatEndPoint(const QPointF);
QString textFormatGlassTranstion(const float t1,const float tg,const float t2);

// glass transition
QPair<float,float> getCurveInflectionPointTangent(const float,const float);
struct Line {
    double slope; //
    double intercept; //
};
QPointF getIntersection(const Line& line1, const Line& line2);
double calculateSlope(double x1, double y1, double x2, double y2) ;
QVector<double> findInflectionPoints(const QVector<double>& x, const QVector<double>& y) ;
QMap<double, Line>  calculateTangentLine(const QVector<double>& x, const QVector<double>& y) ;

//private
void updateStartEndPoint();
QPair<QPointF,QPointF> calculateMaxDiffPointLeft();
QPair<QPointF,QPointF> calculateMaxDiffPointRight();
enum MaxDiffPointDetailType{
    Left,
    Right
};
QPair<QPointF,QPointF> calculateMaxDiffPointDetail(const MaxDiffPointDetailType type);

QPointF calculateIntersection(const QPointF p1,const QPointF p2,
                              const QPointF p3, const QPointF p4);
QVector<QPointF> getPeakPointGroup();
std::vector<float> movingAverage(const std::vector<float>& data, int windowSize);

extern QVector<Global::ExperimentData> _dataVtr;
extern QPointF _peakPoint;
extern QPointF _leftSelectedPoint,_rightSelectedPoint;
}

#endif // POINTCALCULATE_H