/****************************************************************************
**
** Copyright (C) 2013 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 QtDataVisualization module.
**
** 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
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****************************************************************************/

#include "chart.h"
#include <QtDataVisualization/q3dcategoryaxis.h>
#include <QtDataVisualization/q3dvalueaxis.h>
#include <QtDataVisualization/qbardataproxy.h>
#include <QTime>

QT_DATAVISUALIZATION_USE_NAMESPACE

const QString celsiusString = QString(QChar(0xB0)) + "C";

ChartModifier::ChartModifier(Q3DBars *barchart)
    : m_chart(barchart),
      m_xRotation(0.0),
      m_yRotation(0.0),
      m_fontSize(20),
      m_segments(4),
      m_subSegments(3),
      m_minval(-20.0), // TODO Barchart Y-axis currently only properly supports zero-centered ranges
      m_maxval(20.0),
      m_temperatureAxis(new Q3DValueAxis),
      m_yearAxis(new Q3DCategoryAxis),
      m_monthAxis(new Q3DCategoryAxis),
      m_temperatureData(new QBarDataProxy),
      m_style(QDataVis::MeshStyleBevelBars),
      m_smooth(false)
{
    m_months << "January" << "February" << "March" << "April" << "May" << "June" << "July" << "August" << "September" << "October" << "November" << "December";
    m_years << "2006" << "2007" << "2008" << "2009" << "2010" << "2011" << "2012";

    m_chart->setBackgroundVisible(false);

    m_temperatureAxis->setTitle("Average temperature");
    m_temperatureAxis->setSegmentCount(m_segments);
    m_temperatureAxis->setSubSegmentCount(m_subSegments);
    m_temperatureAxis->setRange(m_minval, m_maxval);
    m_temperatureAxis->setLabelFormat(QString(QStringLiteral("%d ") + celsiusString));

    m_yearAxis->setTitle("Year");

    m_monthAxis->setTitle("Month");

    m_chart->addAxis(m_temperatureAxis);
    m_chart->addAxis(m_yearAxis);
    m_chart->addAxis(m_monthAxis);

    m_chart->setShadowQuality(QDataVis::ShadowQualitySoftMedium);

    m_temperatureData->setItemLabelFormat(QStringLiteral("@valueTitle for @colLabel @rowLabel: @valueLabel"));

    m_chart->addDataProxy(m_temperatureData);

    m_chart->setFont(QFont("Times Roman", 20));

    m_chart->setSelectionMode(QDataVis::SelectionModeItem);

    resetTemperatureData();
}

ChartModifier::~ChartModifier()
{
    delete m_chart;
}

void ChartModifier::start()
{
    m_chart->setActiveDataProxy(m_temperatureData);

    m_chart->setTitle(QStringLiteral("Average temperatures in Oulu, Finland (2006-2012)"));

    m_chart->setValueAxis(m_temperatureAxis);
    m_chart->setRowAxis(m_yearAxis);
    m_chart->setColumnAxis(m_monthAxis);
}

void ChartModifier::resetTemperatureData()
{
    // Set up data
    static const qreal temp[7][12] = {
        {-6.7, -11.7, -9.7, 3.3, 9.2, 14.0, 16.3, 17.8, 10.2, 2.1, -2.6, -0.3},    // 2006
        {-6.8, -13.3, 0.2, 1.5, 7.9, 13.4, 16.1, 15.5, 8.2, 5.4, -2.6, -0.8},      // 2007
        {-4.2, -4.0, -4.6, 1.9, 7.3, 12.5, 15.0, 12.8, 7.6, 5.1, -0.9, -1.3},      // 2008
        {-7.8, -8.8, -4.2, 0.7, 9.3, 13.2, 15.8, 15.5, 11.2, 0.6, 0.7, -8.4},      // 2009
        {-14.4, -12.1, -7.0, 2.3, 11.0, 12.6, 18.8, 13.8, 9.4, 3.9, -5.6, -13.0},  // 2010
        {-9.0, -15.2, -3.8, 2.6, 8.3, 15.9, 18.6, 14.9, 11.1, 5.3, 1.8, -0.2},     // 2011
        {-8.7, -11.3, -2.3, 0.4, 7.5, 12.2, 16.4, 14.1, 9.2, 3.1, 0.3, -12.1}      // 2012
    };

    // Create data rows
    QBarDataArray *dataSet = new QBarDataArray;
    QBarDataRow *dataRow;

    dataSet->reserve(m_years.size());
    for (int year = 0; year < m_years.size(); year++) {
        dataRow = new QBarDataRow(m_months.size());
        // Create data items
        for (int month = 0; month < m_months.size(); month++) {
            // Add data to rows
            (*dataRow)[month].setValue(temp[year][month]);
        }
        // Add row to set
        dataSet->append(dataRow);
    }

    // Add data to chart (chart assumes ownership)
    m_temperatureData->resetArray(dataSet, m_years, m_months);
}

void ChartModifier::changeStyle(int style)
{
    m_style = QDataVis::MeshStyle(style);
    m_chart->setBarType(m_style, m_smooth);
}

void ChartModifier::changePresetCamera()
{
    static int preset = QDataVis::CameraPresetFrontLow;

    m_chart->setCameraPreset((QDataVis::CameraPreset)preset);

    if (++preset > QDataVis::CameraPresetDirectlyBelow)
        preset = QDataVis::CameraPresetFrontLow;
}

void ChartModifier::changeTheme(int theme)
{
    m_chart->setTheme((QDataVis::Theme)theme);
}

void ChartModifier::changeLabelStyle()
{
    static int style = QDataVis::LabelStyleOpaque;

    m_chart->setLabelStyle((QDataVis::LabelStyle)style);

    if (++style > QDataVis::LabelStyleTransparent)
        style = QDataVis::LabelStyleOpaque;
}

void ChartModifier::changeSelectionMode(int selectionMode)
{
    m_chart->setSelectionMode((QDataVis::SelectionMode)selectionMode);
}

void ChartModifier::changeFont(const QFont &font)
{
    QFont newFont = font;
    newFont.setPointSize(m_fontSize);
    m_chart->setFont(newFont);
}

void ChartModifier::changeFontSize(int fontsize)
{
    m_fontSize = fontsize;
    QFont font = m_chart->font();
    font.setPointSize(m_fontSize);
    m_chart->setFont(font);
}

void ChartModifier::shadowQualityUpdatedByVisual(QDataVis::ShadowQuality sq)
{
    int quality = int(sq);
    // Updates the UI component to show correct shadow quality
    emit shadowQualityChanged(quality);
}

void ChartModifier::changeShadowQuality(int quality)
{
    QDataVis::ShadowQuality sq = QDataVis::ShadowQuality(quality);
    m_chart->setShadowQuality(sq);
    emit shadowQualityChanged(quality);
}

void ChartModifier::rotateX(int rotation)
{
    m_xRotation = rotation;
    m_chart->setCameraPosition(m_xRotation, m_yRotation);
}

void ChartModifier::rotateY(int rotation)
{
    m_yRotation = rotation;
    m_chart->setCameraPosition(m_xRotation, m_yRotation);
}

void ChartModifier::setBackgroundEnabled(int enabled)
{
    m_chart->setBackgroundVisible((bool)enabled);
}

void ChartModifier::setGridEnabled(int enabled)
{
    m_chart->setGridVisible((bool)enabled);
}

void ChartModifier::setSmoothBars(int smooth)
{
    m_smooth = bool(smooth);
    m_chart->setBarType(m_style, m_smooth);
}