#include "xyanimation_p.h"
#include "xychartitem_p.h"

Q_DECLARE_METATYPE(QVector<QPointF>)

QTCOMMERCIALCHART_BEGIN_NAMESPACE

XYAnimation::XYAnimation(XYChartItem *item):ChartAnimation(item),
    m_item(item),
    m_dirty(false)
{
}

XYAnimation::~XYAnimation()
{
}

void XYAnimation::setValues(QVector<QPointF>& oldPoints,QVector<QPointF>& newPoints,int index)
{

    int x = oldPoints.count();
    int y = newPoints.count();

    if(x!=y && abs(x-y)!=1) {
        m_oldPoints = newPoints;
        oldPoints.resize(newPoints.size());
        setKeyValueAt(0.0, qVariantFromValue(oldPoints));
        setKeyValueAt(1.0, qVariantFromValue(newPoints));
        m_dirty=false;
    }
    else {
        if(m_dirty) {
            m_oldPoints = oldPoints;
            m_dirty=false;
        }
        oldPoints = newPoints;
        if (y<x) (m_oldPoints.remove(index)); //remove
        if (y>x) (m_oldPoints.insert(index,x>0?m_oldPoints[index-1]:newPoints[index])); //add
        setKeyValueAt(0.0, qVariantFromValue(m_oldPoints));
        setKeyValueAt(1.0, qVariantFromValue(newPoints));
        Q_ASSERT(m_oldPoints.count() == newPoints.count());
    }
}

QVariant XYAnimation::interpolated(const QVariant &start, const QVariant & end, qreal progress ) const
{
    QVector<QPointF> startVector = qVariantValue<QVector<QPointF> >(start);
    QVector<QPointF> endVector = qVariantValue<QVector<QPointF> >(end);
    QVector<QPointF> result;

    switch(m_type) {

        case MoveDownAnimation: {

            if(startVector.count() != endVector.count()) break;

            for(int i =0;i< startVector.count();i++) {
                qreal x = startVector[i].x() + ((endVector[i].x()- startVector[i].x()) * progress);
                qreal y = startVector[i].y() + ((endVector[i].y()- startVector[i].y()) * progress);
                result << QPointF(x,y);
            }

        }
            break;
        case LineDrawAnimation:{
            for(int i =0;i< endVector.count()* qBound(0.0, progress, 1.0);i++) {
                result << endVector[i];
            }
        }
            break;
        default:
            qWarning()<<"Unknown type of animation";
            break;
    }

    return qVariantFromValue(result);
}

void XYAnimation::updateCurrentValue (const QVariant & value )
{
    if(state()!=QAbstractAnimation::Stopped){ //workaround
        m_dirty=true;
        QVector<QPointF> vector = qVariantValue<QVector<QPointF> >(value);
        m_item->setLayout(vector);
    }
}

QTCOMMERCIALCHART_END_NAMESPACE