/****************************************************************************
 **
 ** Copyright (C) 2014 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 Enterprise Charts Add-on.
 **
 ** $QT_BEGIN_LICENSE$
 ** Licensees holding valid Qt Enterprise licenses may use this file in
 ** accordance with the Qt Enterprise 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 <private/xychart_p.h>
#include <QtCharts/QXYSeries>
#include <private/qxyseries_p.h>
#include <private/chartpresenter_p.h>
#include <private/abstractdomain_p.h>
#include <QtCharts/QXYModelMapper>
#include <private/qabstractaxis_p.h>
#include <QtGui/QPainter>
#include <QtCore/QAbstractItemModel>


QT_CHARTS_BEGIN_NAMESPACE

XYChart::XYChart(QXYSeries *series, QGraphicsItem *item):
      ChartItem(series->d_func(),item),
      m_series(series),
      m_animation(0),
      m_dirty(true)
{
    QObject::connect(series, SIGNAL(pointReplaced(int)), this, SLOT(handlePointReplaced(int)));
    QObject::connect(series, SIGNAL(pointsReplaced()), this, SLOT(handlePointsReplaced()));
    QObject::connect(series, SIGNAL(pointAdded(int)), this, SLOT(handlePointAdded(int)));
    QObject::connect(series, SIGNAL(pointRemoved(int)), this, SLOT(handlePointRemoved(int)));
    QObject::connect(this, SIGNAL(clicked(QPointF)), series, SIGNAL(clicked(QPointF)));
    QObject::connect(this, SIGNAL(hovered(QPointF,bool)), series, SIGNAL(hovered(QPointF,bool)));
    QObject::connect(this, SIGNAL(pressed(QPointF)), series, SIGNAL(pressed(QPointF)));
    QObject::connect(this, SIGNAL(released(QPointF)), series, SIGNAL(released(QPointF)));
    QObject::connect(this, SIGNAL(doubleClicked(QPointF)), series, SIGNAL(doubleClicked(QPointF)));
}

void XYChart::setGeometryPoints(const QVector<QPointF> &points)
{
    m_points = points;
}

void XYChart::setAnimation(XYAnimation *animation)
{
    m_animation = animation;
}

void XYChart::setDirty(bool dirty)
{
    m_dirty = dirty;
}

// Returns a vector with same size as geometryPoints vector, indicating
// the off grid status of points.
QVector<bool> XYChart::offGridStatusVector()
{
    qreal minX = domain()->minX();
    qreal maxX = domain()->maxX();
    qreal minY = domain()->minY();
    qreal maxY = domain()->maxY();

    QVector<bool> returnVector;
    returnVector.resize(m_points.size());
    // During remove animation series may have different number of points,
    // so ensure we don't go over the index. No need to check for zero points, this
    // will not be called in such a situation.
    const int seriesLastIndex = m_series->count() - 1;

    for (int i = 0; i < m_points.size(); i++) {
        const QPointF &seriesPoint = m_series->at(qMin(seriesLastIndex, i));
        if (seriesPoint.x() < minX
            || seriesPoint.x() > maxX
            || seriesPoint.y() < minY
            || seriesPoint.y() > maxY) {
            returnVector[i] = true;
        } else {
            returnVector[i] = false;
        }
    }
    return returnVector;
}

void XYChart::updateChart(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints, int index)
{

    if (m_animation) {
        m_animation->setup(oldPoints, newPoints, index);
        m_points = newPoints;
        setDirty(false);
        presenter()->startAnimation(m_animation);
    } else {
        m_points = newPoints;
        updateGeometry();
    }
}

//handlers

void XYChart::handlePointAdded(int index)
{
    Q_ASSERT(index < m_series->count());
    Q_ASSERT(index >= 0);

    QVector<QPointF> points;

    if (m_dirty || m_points.isEmpty()) {
        points = domain()->calculateGeometryPoints(m_series->points());
    } else {
        points = m_points;
        QPointF point = domain()->calculateGeometryPoint(m_series->points()[index], m_validData);
        if (!m_validData)
            m_points.clear();
        else
            points.insert(index, point);
    }

    updateChart(m_points, points, index);
}

void XYChart::handlePointRemoved(int index)
{
    Q_ASSERT(index <= m_series->count());
    Q_ASSERT(index >= 0);

    QVector<QPointF> points;

    if (m_dirty || m_points.isEmpty()) {
        points = domain()->calculateGeometryPoints(m_series->points());
    } else {
        points = m_points;
        points.remove(index);
    }

    updateChart(m_points, points, index);
}

void XYChart::handlePointReplaced(int index)
{
    Q_ASSERT(index < m_series->count());
    Q_ASSERT(index >= 0);

    QVector<QPointF> points;

    if (m_dirty || m_points.isEmpty()) {
        points = domain()->calculateGeometryPoints(m_series->points());
    } else {
        QPointF point = domain()->calculateGeometryPoint(m_series->points()[index], m_validData);
        if (!m_validData)
            m_points.clear();
        points = m_points;
        if (m_validData)
            points.replace(index, point);
    }

    updateChart(m_points, points, index);
}

void XYChart::handlePointsReplaced()
{
    // All the points were replaced -> recalculate
    QVector<QPointF> points =  domain()->calculateGeometryPoints(m_series->points());
    updateChart(m_points, points, -1);
}

void XYChart::handleDomainUpdated()
{
    if (isEmpty()) return;
    QVector<QPointF> points =  domain()->calculateGeometryPoints(m_series->points());
    updateChart(m_points, points);
}

bool XYChart::isEmpty()
{
    return domain()->isEmpty() || m_series->points().isEmpty();
}

#include "moc_xychart_p.cpp"

QT_CHARTS_END_NAMESPACE