/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Data Visualization module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
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** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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** $QT_END_LICENSE$
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****************************************************************************/

#include "data.h"

#include <QApplication>
#include <QWidget>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QPushButton>
#include <QLabel>
#include <QComboBox>
#include <QSlider>
#include <QTextEdit>
#include <QScreen>
#include <QPainter>

int main(int argc, char **argv)
{
    qputenv("QSG_RHI_BACKEND", "opengl");
    QApplication app(argc, argv);

    QWidget *widget = new QWidget();
    QHBoxLayout *hLayout = new QHBoxLayout(widget);
    QVBoxLayout *vLayout = new QVBoxLayout();

    Q3DSurface *surface = new Q3DSurface();
    Q3DScatter *scatter = new Q3DScatter();
    Q3DBars *bars = new Q3DBars();

    QSize screenSize = surface->screen()->size();

    QWidget *containerSurface = QWidget::createWindowContainer(surface);
    containerSurface->setMinimumSize(QSize(screenSize.height() / 1.2, screenSize.height() / 1.2));
    containerSurface->setMaximumSize(screenSize);
    containerSurface->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    containerSurface->setFocusPolicy(Qt::StrongFocus);

    QWidget *containerScatter = QWidget::createWindowContainer(scatter);
    containerScatter->setMinimumSize(QSize(screenSize.height() / 1.2, screenSize.height() / 1.2));
    containerScatter->setMaximumSize(screenSize);
    containerScatter->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    containerScatter->setFocusPolicy(Qt::StrongFocus);
    containerScatter->setVisible(false);

    QWidget *containerBars = QWidget::createWindowContainer(bars);
    containerBars->setMinimumSize(QSize(screenSize.height() / 1.2, screenSize.height() / 1.2));
    containerBars->setMaximumSize(screenSize);
    containerBars->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    containerBars->setFocusPolicy(Qt::StrongFocus);
    containerBars->setVisible(false);

    widget->setWindowTitle(QStringLiteral("Test switching graphs on the fly"));

    hLayout->addWidget(containerSurface, 1);
    hLayout->addWidget(containerScatter, 1);
    hLayout->addWidget(containerBars, 1);
    hLayout->addLayout(vLayout);

    QPushButton *startButton = new QPushButton(widget);
    startButton->setText(QStringLiteral("Start"));

    QPushButton *stopButton = new QPushButton(widget);
    stopButton->setText(QStringLiteral("Stop"));

    QComboBox *resolutionBox = new QComboBox(widget);
    resolutionBox->addItem(QStringLiteral("Low"));
    resolutionBox->addItem(QStringLiteral("Medium"));
    resolutionBox->addItem(QStringLiteral("High"));
    resolutionBox->addItem(QStringLiteral("Max")); // Comment this out if demo machine is low-perf
    resolutionBox->setCurrentIndex(0);

    QComboBox *modeBox = new QComboBox(widget);
    modeBox->addItem(QStringLiteral("Surface Plot"));
    modeBox->addItem(QStringLiteral("Scatter Chart"));
    modeBox->addItem(QStringLiteral("Bar Chart"));
    modeBox->setCurrentIndex(0);

    QLinearGradient gradientOne(0, 0, 200, 1);
    gradientOne.setColorAt(0.0, Qt::black);
    gradientOne.setColorAt(0.33, Qt::blue);
    gradientOne.setColorAt(0.67, Qt::red);
    gradientOne.setColorAt(1.0, Qt::yellow);

    QPixmap pm(200, 24);
    QPainter pmp(&pm);
    pmp.setBrush(QBrush(gradientOne));
    pmp.setPen(Qt::NoPen);
    pmp.drawRect(0, 0, 200, 24);

    QPushButton *gradientOneButton = new QPushButton(widget);
    gradientOneButton->setIcon(QIcon(pm));
    gradientOneButton->setIconSize(QSize(200, 24));
    gradientOneButton->setToolTip(QStringLiteral("Colors: Thermal Imitation"));

    QLinearGradient gradientTwo(0, 0, 200, 1);
    gradientTwo.setColorAt(0.0, Qt::white);
    gradientTwo.setColorAt(0.8, Qt::red);
    gradientTwo.setColorAt(1.0, Qt::green);

    pmp.setBrush(QBrush(gradientTwo));
    pmp.setPen(Qt::NoPen);
    pmp.drawRect(0, 0, 200, 24);

    QPushButton *gradientTwoButton = new QPushButton(widget);
    gradientTwoButton->setIcon(QIcon(pm));
    gradientTwoButton->setIconSize(QSize(200, 24));
    gradientTwoButton->setToolTip(QStringLiteral("Colors: Highlight Foreground"));

    QTextEdit *status = new QTextEdit(QStringLiteral("<b>Ready</b><br>"), widget);
    status->setReadOnly(true);

    vLayout->addWidget(startButton);
    vLayout->addWidget(stopButton);
    vLayout->addWidget(new QLabel(QStringLiteral("Change resolution")));
    vLayout->addWidget(resolutionBox);
    vLayout->addWidget(new QLabel(QStringLiteral("Change visualization type")));
    vLayout->addWidget(modeBox);
    vLayout->addWidget(new QLabel(QStringLiteral("Change color scheme")));
    vLayout->addWidget(gradientOneButton);
    vLayout->addWidget(gradientTwoButton);
    vLayout->addWidget(status, 1, Qt::AlignBottom);

    widget->show();

    Data datagen(surface, scatter, bars, status, widget);
    ContainerChanger changer(containerSurface, containerScatter, containerBars,
                             gradientOneButton, gradientTwoButton);

    QObject::connect(startButton, &QPushButton::clicked, &datagen, &Data::start);
    QObject::connect(stopButton, &QPushButton::clicked, &datagen, &Data::stop);
    QObject::connect(resolutionBox, SIGNAL(activated(int)), &datagen, SLOT(setResolution(int)));
    QObject::connect(modeBox, SIGNAL(activated(int)), &changer, SLOT(changeContainer(int)));
    QObject::connect(modeBox, SIGNAL(activated(int)), &datagen, SLOT(changeMode(int)));
    QObject::connect(status, &QTextEdit::textChanged, &datagen, &Data::scrollDown);
    QObject::connect(gradientOneButton, &QPushButton::clicked, &datagen,
                     &Data::useGradientOne);
    QObject::connect(gradientTwoButton, &QPushButton::clicked, &datagen,
                     &Data::useGradientTwo);

    return app.exec();
}
