#include "lrhorizontalbarchart.h"

namespace LimeReport {

void HorizontalBarChart::paintChart(QPainter* painter, QRectF chartRect)
{
    updateMinAndMaxValues();

    const qreal valuesVMargin = this->valuesVMargin(painter);

    QRectF calcRect = verticalLabelsRect(
        painter,
        chartRect.adjusted(hPadding(chartRect), vPadding(chartRect) * 2, -(chartRect.width() * 0.9),
                           -(vPadding(chartRect) * 2 + valuesVMargin)));

    qreal barsShift = calcRect.width();

    paintHorizontalGrid(painter,
                        chartRect.adjusted(hPadding(chartRect) + barsShift, vPadding(chartRect),
                                           -(hPadding(chartRect)), -vPadding(chartRect)));

    paintHorizontalBars(painter,
                        chartRect.adjusted(hPadding(chartRect) + barsShift, vPadding(chartRect) * 2,
                                           -(hPadding(chartRect)), -(vPadding(chartRect) * 2)));

    paintVerticalLabels(painter, calcRect);
}

void HorizontalBarChart::paintHorizontalBars(QPainter* painter, QRectF barsRect)
{
    if (seriesCount() == 0)
        return;

    painter->save();
    painter->setRenderHint(QPainter::Antialiasing, false);

    const AxisData& yAxisData = this->yAxisData();
    const qreal delta = yAxisData.delta();

    const qreal verticalOffset = painter->fontMetrics().height();
    qreal vStep = (barsRect.height() - verticalOffset) / valuesCount() / seriesCount();
    qreal hStep = (barsRect.width()
                   - painter->fontMetrics().boundingRect(QString::number(maxValue())).width())
        / delta;

    if (!m_chartItem->series().isEmpty() && (m_chartItem->itemMode() != DesignMode)) {
        qreal curVOffset = barsRect.top();
        if (m_chartItem->horizontalAxisOnTop()) {
            curVOffset += verticalOffset;
        }
        foreach (SeriesItem* series, m_chartItem->series()) {
            painter->setBrush(series->color());
            qreal y = curVOffset;
            foreach (qreal value, series->data()->values()) {
                painter->drawRect(
                    QRectF((-minValue() * hStep) + barsRect.left(), y, value * hStep, vStep));
                y += vStep * seriesCount();
            }
            curVOffset += vStep;
        }
    } else {
        qreal curVOffset = barsRect.top();
        if (m_chartItem->horizontalAxisOnTop()) {
            curVOffset += verticalOffset;
        }
        int curColor = 0;
        for (int i = 0; i < 9; ++i) {
            if (curColor == 3)
                curColor = 0;
            painter->setBrush(color_map[curColor]);
            painter->drawRect(
                QRectF(barsRect.left(), curVOffset, designValues()[i] * hStep, vStep));
            curVOffset += vStep;
            curColor++;
        }
    }
    painter->restore();
}

} // namespace LimeReport