/****************************************************************************
**
** Copyright (C) 2012 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the Qt Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
****************************************************************************/

#include "axisanimation_p.h"
#include "chartaxis_p.h"
#include <QTimer>
#include <QDebug>

Q_DECLARE_METATYPE(QVector<qreal>)

QTCOMMERCIALCHART_BEGIN_NAMESPACE


AxisAnimation::AxisAnimation(ChartAxis *axis): ChartAnimation(axis),
    m_axis(axis),
    m_type(DefaultAnimation)
{
    setDuration(ChartAnimationDuration);
    setEasingCurve(QEasingCurve::OutQuart);
}

AxisAnimation::~AxisAnimation()
{
}

void AxisAnimation::setAnimationType(Animation type)
{
    if (state() != QAbstractAnimation::Stopped) stop();
    m_type=type;
}

void AxisAnimation::setAnimationPoint(const QPointF& point)
{
    if (state() != QAbstractAnimation::Stopped) stop();
    m_point=point;
}

void AxisAnimation::setValues(QVector<qreal> &oldLayout, QVector<qreal> &newLayout)
{
      if (state() != QAbstractAnimation::Stopped) stop();

      if (newLayout.count() == 0)
          return;

      switch (m_type) {
      case ZoomOutAnimation: {
          QRectF rect = m_axis->geometry();
          oldLayout.resize(newLayout.count());

          for(int i = 0, j = oldLayout.count() - 1; i < (oldLayout.count() + 1) / 2; ++i, --j) {
              oldLayout[i] = m_axis->axisType() == ChartAxis::X_AXIS ? rect.left() : rect.bottom();
              oldLayout[j] = m_axis->axisType() == ChartAxis::X_AXIS ? rect.right() : rect.top();
          }
      }
          break;
      case ZoomInAnimation: {
          int index = qMin(oldLayout.count() * (m_axis->axisType() == ChartAxis::X_AXIS ? m_point.x() : (1 - m_point.y())), newLayout.count() - 1.0);
          oldLayout.resize(newLayout.count());

          for(int i = 0; i < oldLayout.count(); i++)
              oldLayout[i]= oldLayout[index];
      }
          break;
      case MoveForwardAnimation: {
          oldLayout.resize(newLayout.count());

          for(int i = 0, j = i + 1; i < oldLayout.count() - 1; ++i, ++j)
              oldLayout[i]= oldLayout[j];
      }
          break;
      case MoveBackwordAnimation: {
          oldLayout.resize(newLayout.count());

          for(int i = oldLayout.count() - 1, j = i - 1; i > 0; --i, --j)
              oldLayout[i]= oldLayout[j];
      }
          break;
      default: {
          oldLayout.resize(newLayout.count());
          QRectF rect = m_axis->geometry();
          for(int i = 0, j = oldLayout.count() - 1; i < oldLayout.count(); ++i, --j)
              oldLayout[i] = m_axis->axisType() == ChartAxis::X_AXIS ? rect.left() : rect.top();
      }
          break;
      }

      QVariantAnimation::KeyValues value;
      setKeyValues(value); //workaround for wrong interpolation call
      setKeyValueAt(0.0, qVariantFromValue(oldLayout));
      setKeyValueAt(1.0, qVariantFromValue(newLayout));
}

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

    Q_ASSERT(startVector.count() == endVecotr.count()) ;

    for(int i = 0; i < startVector.count(); i++){
           qreal value = startVector[i] + ((endVecotr[i]- startVector[i]) * progress);//qBound(0.0, progress, 1.0));
           result << value;
    }
    return qVariantFromValue(result);
}


void AxisAnimation::updateCurrentValue (const QVariant &value )
{
    if (state() != QAbstractAnimation::Stopped)//workaround
    {
        QVector<qreal> vector = qVariantValue<QVector<qreal> >(value);
        Q_ASSERT(vector.count() != 0);
        m_axis->setLayout(vector);
        m_axis->updateGeometry();
    }

}

QTCOMMERCIALCHART_END_NAMESPACE