#ifndef CHART_SCENE_H
#define CHART_SCENE_H

#include <QtCore>
#include <QtWidgets>

#include "Chart.h"
#include "DataPoint.h"

class ChartScene: public QGraphicsScene
{
public:
    static const QSizeF Margin;
    static const QSizeF Padding;
    static const QSizeF DataSetPadding;

public:
    static QSizeF getBorder();

public:
    ChartScene(Chart* chart);
    void setDataSet(const QList<DataPoint>& dataSet, int xTickInterval);
    void setDataDirection(int direction) { dataDirection = direction; }
    QString getXLabel() const { return chart->getXLabel(); }
    QString getYLabel() const { return chart->getYLabel(); }
    int getDataDirection() const { return dataDirection; }
    QPointF getChartOrigin() const;
    QRectF getChartRect() const;
    QSizeF getDataSetSize() const;
    QList<DataPoint> getDataSet() const {return dataSet; }
    qreal getXTickSpacing() const;
    qreal getYPosFromValue(int value) const;
    int getMinY() const { return yMin; }
    int getMaxY() const { return yMax; }
    int getYDiff() const { return yMax - yMin; }
    int getYTickSpacing() const { return yTickSpacing; }

private:
    void initYScale();
    int computeMinY() const;
    int computeMaxY() const;
    int computeYTickSpacing() const;
    void extendYMinMax();

private:
    Chart* chart;
    QList<DataPoint> dataSet;
    int yMin;
    int yMax;
    qreal yScale;
    int yTickSpacing;
    int dataDirection;
};

#endif