/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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****************************************************************************/

#include <private/barchartitem_p.h>
#include <private/bar_p.h>
#include <private/qabstractbarseries_p.h>
#include <QtCharts/QBarSet>
#include <private/qbarset_p.h>

QT_BEGIN_NAMESPACE

BarChartItem::BarChartItem(QAbstractBarSeries *series, QGraphicsItem* item) :
    AbstractBarChartItem(series, item)
{
    m_orientation = Qt::Vertical;
    connect(series, SIGNAL(labelsPositionChanged(QAbstractBarSeries::LabelsPosition)),
            this, SLOT(handleLabelsPositionChanged()));
    connect(series, SIGNAL(labelsFormatChanged(QString)), this, SLOT(positionLabels()));
}

void BarChartItem::initializeLayout(int set, int category, int layoutIndex, bool resetAnimation)
{
    QRectF rect;

    if (set > 0) {
        QBarSet *barSet = m_series->barSets().at(set - 1);
        Bar *bar = m_indexForBarMap.value(barSet).value(category);
        rect = m_layout.at(bar->layoutIndex());
        qreal oldRight = rect.right();
        if (resetAnimation)
            rect.setRight(oldRight + rect.width());
        rect.setLeft(oldRight);
        rect.setTop(rect.bottom());
    } else {
        QPointF topLeft;
        QPointF bottomRight;
        const int setCount = m_series->count();
        const qreal barWidth = m_series->d_func()->barWidth() * m_seriesWidth;
        if (domain()->type() == AbstractDomain::XLogYDomain
                || domain()->type() == AbstractDomain::LogXLogYDomain) {
            topLeft = topLeftPoint(set, setCount, category, barWidth, domain()->minY());
            bottomRight = bottomRightPoint(set, setCount, category, barWidth, domain()->minY());
        } else {
            topLeft = topLeftPoint(set, setCount, category, barWidth, 0.0);
            bottomRight = bottomRightPoint(set, setCount, category, barWidth, 0.0);
        }

        if (m_validData) {
            rect.setTopLeft(topLeft);
            rect.setBottomRight(bottomRight);
        }
    }
    m_layout[layoutIndex] = rect.normalized();
}

QPointF BarChartItem::topLeftPoint(int set, int setCount, int category,
                                   qreal barWidth, qreal value)
{
    return domain()->calculateGeometryPoint(
                QPointF(m_seriesPosAdjustment + category - (barWidth / 2.0)
                        + (qreal(set)/setCount) * barWidth,
                        value), m_validData);
}

QPointF BarChartItem::bottomRightPoint(int set, int setCount,
                                       int category, qreal barWidth, qreal value)
{
    return domain()->calculateGeometryPoint(
                QPointF(m_seriesPosAdjustment + category - (barWidth / 2.0)
                        + (qreal(set + 1)/setCount) * barWidth,
                        value), m_validData);
}

QList<QRectF> BarChartItem::calculateLayout()
{
    QList<QRectF> layout;
    layout.resize(m_layout.size());

    const int setCount = m_series->count();
    const qreal barWidth = m_series->d_func()->barWidth() * m_seriesWidth;

    for (int set = 0; set < setCount; set++) {
        QBarSet *barSet = m_series->barSets().at(set);
        const QList<Bar *> bars = m_barMap.value(barSet);
        for (int i = 0; i < m_categoryCount; i++) {
            Bar *bar = bars.at(i);
            const int category = bar->index();
            qreal value = barSet->at(category);
            QRectF rect;
            QPointF topLeft = topLeftPoint(set, setCount, category, barWidth, value);
            QPointF bottomRight;
            if (domain()->type() == AbstractDomain::XLogYDomain
                    || domain()->type() == AbstractDomain::LogXLogYDomain) {
                bottomRight = bottomRightPoint(set, setCount, category, barWidth, domain()->minY());
            } else {
                bottomRight = bottomRightPoint(set, setCount, category, barWidth, 0.0);
            }

            rect.setTopLeft(topLeft);
            rect.setBottomRight(bottomRight);
            layout[bar->layoutIndex()] = rect.normalized();
        }
    }

    return layout;
}

void BarChartItem::handleLabelsPositionChanged()
{
    positionLabels();
}

void BarChartItem::positionLabels()
{
    positionLabelsVertical();
}

QT_END_NAMESPACE

#include "moc_barchartitem_p.cpp"
