/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** 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
** and conditions see https://www.qt.io/terms-conditions. For further
** 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 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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.
**
****************************************************************************/

#include "versiondialog.h"
#include "coreicons.h"

#include <app/app_version.h>
#include <coreplugin/coreicons.h>
#include <coreplugin/icore.h>
#include <utils/algorithm.h>
#include <utils/hostosinfo.h>
#include <utils/qtcassert.h>
#include <utils/utilsicons.h>

#include <QDialogButtonBox>
#include <QGridLayout>
#include <QKeyEvent>
#include <QLabel>
#include <QPushButton>

using namespace Core;
using namespace Core::Internal;

VersionDialog::VersionDialog(QWidget *parent)
    : QDialog(parent)
{
    // We need to set the window icon explicitly here since for some reason the
    // application icon isn't used when the size of the dialog is fixed (at least not on X11/GNOME)
    if (Utils::HostOsInfo::isLinuxHost())
        setWindowIcon(Icons::QTCREATORLOGO_BIG.icon());

    setWindowTitle(tr("About %1").arg(Core::Constants::IDE_DISPLAY_NAME));
    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
    auto layout = new QGridLayout(this);
    layout->setSizeConstraint(QLayout::SetFixedSize);

    QString ideRev;
#ifdef IDE_REVISION
     //: This gets conditionally inserted as argument %8 into the description string.
     ideRev = tr("<br/>From revision %1<br/>").arg(QString::fromLatin1(Constants::IDE_REVISION_STR).left(10));
#endif
     QString buildDateInfo;
#ifdef QTC_SHOW_BUILD_DATE
     buildDateInfo = tr("<br/>Built on %1 %2<br/>").arg(QLatin1String(__DATE__), QLatin1String(__TIME__));
#endif

    const QString br = QLatin1String("<br/>");
    const QStringList additionalInfoLines = ICore::additionalAboutInformation();
    const QString additionalInfo =
            QStringList(Utils::transform(additionalInfoLines, &QString::toHtmlEscaped)).join(br);

    const QString description = tr(
        "<h3>%1</h3>"
        "%2<br/>"
        "%3"
        "%4"
        "%5"
        "<br/>"
        "Copyright 2008-%6 %7. All rights reserved.<br/>"
        "<br/>"
        "The program is provided AS IS with NO WARRANTY OF ANY KIND, "
        "INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A "
        "PARTICULAR PURPOSE.<br/>")
        .arg(ICore::versionString(),
             ICore::buildCompatibilityString(),
             buildDateInfo,
             ideRev,
             additionalInfo.isEmpty() ? QString() : br + additionalInfo + br,
             QLatin1String(Constants::IDE_YEAR),
             QLatin1String(Constants::IDE_AUTHOR));

    QLabel *copyRightLabel = new QLabel(description);
    copyRightLabel->setWordWrap(true);
    copyRightLabel->setOpenExternalLinks(true);
    copyRightLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);

    QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
    QPushButton *closeButton = buttonBox->button(QDialogButtonBox::Close);
    QTC_CHECK(closeButton);
    buttonBox->addButton(closeButton, QDialogButtonBox::ButtonRole(QDialogButtonBox::RejectRole | QDialogButtonBox::AcceptRole));
    connect(buttonBox , &QDialogButtonBox::rejected, this, &QDialog::reject);

    QLabel *logoLabel = new QLabel;
    logoLabel->setPixmap(Icons::QTCREATORLOGO_BIG.pixmap());
    layout->addWidget(logoLabel , 0, 0, 1, 1);
    layout->addWidget(copyRightLabel, 0, 1, 4, 4);
    layout->addWidget(buttonBox, 4, 0, 1, 5);
}

bool VersionDialog::event(QEvent *event)
{
    if (event->type() == QEvent::ShortcutOverride) {
        auto ke = static_cast<QKeyEvent *>(event);
        if (ke->key() == Qt::Key_Escape && !ke->modifiers()) {
            ke->accept();
            return true;
        }
    }
    return QDialog::event(event);
}