/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2005-04-02
 * Description : setup Misc tab.
 *
 * Copyright (C) 2005-2020 by Gilles Caulier <caulier dot gilles at gmail dot com>
 * Copyright (C)      2008 by Arnd Baecker <arnd dot baecker at web dot de>
 * Copyright (C)      2014 by Mohamed_Anwer <m_dot_anwer at gmx dot com>
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * ============================================================ */

#include "showfotosetupmisc.h"

// Qt includes

#include <QCheckBox>
#include <QColor>
#include <QGroupBox>
#include <QLabel>
#include <QVBoxLayout>
#include <QStyleFactory>
#include <QApplication>
#include <QDirIterator>
#include <QStyle>
#include <QComboBox>
#include <QFile>
#include <QTabWidget>

// KDE includes

#include <klocalizedstring.h>

// Local includes

#include "digikam_config.h"
#include "dlayoutbox.h"
#include "dfontselect.h"
#include "showfotosettings.h"
#include "systemsettingswidget.h"

using namespace Digikam;

namespace ShowFoto
{

class Q_DECL_HIDDEN SetupMisc::Private
{
public:

    explicit Private()
      : tab(nullptr),
        sidebarTypeLabel(nullptr),
        applicationStyleLabel(nullptr),
        applicationIconLabel(nullptr),
        showSplash(nullptr),
        nativeFileDialog(nullptr),
        itemCenter(nullptr),
        showMimeOverImage(nullptr),
        showCoordinates(nullptr),
        sortReverse(nullptr),
        sidebarType(nullptr),
        sortOrderComboBox(nullptr),
        applicationStyle(nullptr),
        applicationIcon(nullptr),
        applicationFont(nullptr),
        systemSettingsWidget(nullptr),
        settings(ShowfotoSettings::instance())
    {
    }

    QTabWidget*           tab;

    QLabel*               sidebarTypeLabel;
    QLabel*               applicationStyleLabel;
    QLabel*               applicationIconLabel;

    QCheckBox*            showSplash;
    QCheckBox*            nativeFileDialog;
    QCheckBox*            itemCenter;
    QCheckBox*            showMimeOverImage;
    QCheckBox*            showCoordinates;
    QCheckBox*            sortReverse;

    QComboBox*            sidebarType;
    QComboBox*            sortOrderComboBox;
    QComboBox*            applicationStyle;
    QComboBox*            applicationIcon;
    DFontSelect*          applicationFont;

    SystemSettingsWidget* systemSettingsWidget;

    ShowfotoSettings*     settings;
};

// --------------------------------------------------------

SetupMisc::SetupMisc(QWidget* const parent)
    : QScrollArea(parent),
      d(new Private)
{
    d->tab = new QTabWidget(viewport());
    setWidget(d->tab);
    setWidgetResizable(true);

    const int spacing         = QApplication::style()->pixelMetric(QStyle::PM_DefaultLayoutSpacing);

    // -- Application Behavior Options --------------------------------------------------------

    QWidget* const behaviourPanel = new QWidget(d->tab);
    QVBoxLayout* const layout     = new QVBoxLayout(behaviourPanel);

    // -- Sort Order Options --------------------------------------------------------

    QGroupBox* const sortOptionsGroup = new QGroupBox(i18n("Images Sort Order"), behaviourPanel);
    QVBoxLayout* const gLayout4       = new QVBoxLayout();

    DHBox* const sortBox = new DHBox(sortOptionsGroup);
    new QLabel(i18n("Sort images by:"), sortBox);
    d->sortOrderComboBox = new QComboBox(sortBox);
    d->sortOrderComboBox->insertItem(SortByDate,     i18nc("sort images by date", "Date"));
    d->sortOrderComboBox->insertItem(SortByName,     i18nc("sort images by name", "Name"));
    d->sortOrderComboBox->insertItem(SortByFileSize, i18nc("sort images by size", "File Size"));
    d->sortOrderComboBox->setWhatsThis(i18n("Here, select whether newly-loaded "
                                            "images are sorted by their date, name, or size on disk."));

    d->sortReverse = new QCheckBox(i18n("Reverse ordering"), sortOptionsGroup);
    d->sortReverse->setWhatsThis(i18n("If this option is enabled, newly-loaded "
                                      "images will be sorted in descending order."));

    gLayout4->addWidget(sortBox);
    gLayout4->addWidget(d->sortReverse);
    sortOptionsGroup->setLayout(gLayout4);

    // Thumbnails Options ----------------------------------------------------------------------

    QGroupBox* const thOptionsGroup = new QGroupBox(i18n("Thumbnails"), behaviourPanel);
    QVBoxLayout* const gLayout3     = new QVBoxLayout();

    d->showMimeOverImage = new QCheckBox(i18n("&Show image Format"),          thOptionsGroup);
    d->showMimeOverImage->setWhatsThis(i18n("Set this option to show image format over image thumbnail."));
    d->showCoordinates   = new QCheckBox(i18n("&Show Geolocation Indicator"), thOptionsGroup);
    d->showCoordinates->setWhatsThis(i18n("Set this option to indicate if image has geolocation information."));
    d->itemCenter        = new QCheckBox(i18n("Scroll current item to center of thumbbar"), thOptionsGroup);

    gLayout3->addWidget(d->showMimeOverImage);
    gLayout3->addWidget(d->showCoordinates);
    gLayout3->addWidget(d->itemCenter);
    thOptionsGroup->setLayout(gLayout3);

    // ---------------------------------------------------------

    layout->setContentsMargins(spacing, spacing, spacing, spacing);
    layout->setSpacing(spacing);
    layout->addWidget(sortOptionsGroup);
    layout->addWidget(thOptionsGroup);
    layout->addStretch();

    d->tab->insertTab(Behaviour, behaviourPanel, i18nc("@title:tab", "Behaviour"));

    // -- Application Appearance Options --------------------------------------------------------

    QWidget* const appearancePanel = new QWidget(d->tab);
    QVBoxLayout* const layout2     = new QVBoxLayout(appearancePanel);

    d->showSplash       = new QCheckBox(i18n("&Show splash screen at startup"),            appearancePanel);
    d->nativeFileDialog = new QCheckBox(i18n("Use native file dialogs from the system"),   appearancePanel);

    DHBox* const tabStyleHbox = new DHBox(appearancePanel);
    d->sidebarTypeLabel       = new QLabel(i18n("Sidebar tab title:"), tabStyleHbox);
    d->sidebarType            = new QComboBox(tabStyleHbox);
    d->sidebarType->addItem(i18n("Only For Active Tab"), 0);
    d->sidebarType->addItem(i18n("For All Tabs"),        1);
    d->sidebarType->setToolTip(i18n("Set this option to configure how sidebars tab title are visible."));

    DHBox* const appStyleHbox = new DHBox(appearancePanel);
    d->applicationStyleLabel  = new QLabel(i18n("Widget style:"), appStyleHbox);
    d->applicationStyle       = new QComboBox(appStyleHbox);
    d->applicationStyle->setToolTip(i18n("Set this option to choose the default window decoration and looks."));

    QStringList styleList = QStyleFactory::keys();

    for (int i = 0 ; i < styleList.count() ; ++i)
    {
        if (styleList.at(i).compare(QLatin1String("windowsvista"), Qt::CaseInsensitive) != 0)
        {
            d->applicationStyle->addItem(styleList.at(i), styleList.at(i).toLower());
        }
    }

#ifndef HAVE_APPSTYLE_SUPPORT

    // See Bug #365262
    appStyleHbox->setVisible(false);

#endif

    DHBox* const iconThemeHbox = new DHBox(appearancePanel);
    d->applicationIconLabel    = new QLabel(i18n("Icon theme (changes after restart):"), iconThemeHbox);
    d->applicationIcon         = new QComboBox(iconThemeHbox);
    d->applicationIcon->setToolTip(i18n("Set this option to choose the default icon theme."));

    QMap<QString, QString> iconThemes;
    QMap<QString, QString> themeWhiteList;
    themeWhiteList.insert(QLatin1String("adwaita"),         i18nc("icon theme", "Adwaita"));
    themeWhiteList.insert(QLatin1String("breeze"),          i18nc("icon theme", "Breeze"));
    themeWhiteList.insert(QLatin1String("breeze-dark"),     i18nc("icon theme", "Breeze Dark"));
    themeWhiteList.insert(QLatin1String("faenza"),          i18nc("icon theme", "Faenza"));
    themeWhiteList.insert(QLatin1String("faenza-ambiance"), i18nc("icon theme", "Ambiance"));
    themeWhiteList.insert(QLatin1String("humanity"),        i18nc("icon theme", "Humanity"));
    themeWhiteList.insert(QLatin1String("oxygen"),          i18nc("icon theme", "Oxygen"));

    foreach (const QString& path, QIcon::themeSearchPaths())
    {
        QDirIterator it(path, QDir::Dirs       |
                              QDir::NoSymLinks |
                              QDir::NoDotAndDotDot);

        while (it.hasNext())
        {
            if (QFile::exists(it.next() + QLatin1String("/index.theme")))
            {
                QString iconKey = it.fileInfo().fileName().toLower();

                if (themeWhiteList.contains(iconKey))
                {
                    iconThemes[themeWhiteList.value(iconKey)] = it.fileInfo().fileName();
                }
            }
        }
    }

    QMap<QString, QString>::const_iterator it = iconThemes.constBegin();
    d->applicationIcon->addItem(i18n("Use Icon Theme From System"), QString());

    for ( ; it != iconThemes.constEnd() ; ++it)
    {
        d->applicationIcon->addItem(it.key(), it.value());
    }

    d->applicationFont = new DFontSelect(i18n("Application font:"), appearancePanel);
    d->applicationFont->setToolTip(i18n("Select here the font used to display text in whole application."));

    // --------------------------------------------------------

    layout2->setContentsMargins(spacing, spacing, spacing, spacing);
    layout2->setSpacing(spacing);
    layout2->addWidget(d->showSplash);
    layout2->addWidget(d->nativeFileDialog);
    layout2->addWidget(tabStyleHbox);
    layout2->addWidget(appStyleHbox);
    layout2->addWidget(iconThemeHbox);
    layout2->addWidget(d->applicationFont);
    layout2->addStretch();

    d->tab->insertTab(Appearance, appearancePanel, i18nc("@title:tab", "Appearance"));

    // -- System Options --------------------------------------------------------

    d->systemSettingsWidget = new SystemSettingsWidget(d->tab);

    d->tab->insertTab(System, d->systemSettingsWidget, i18nc("@title:tab", "System"));

    // --------------------------------------------------------

    readSettings();
}

SetupMisc::~SetupMisc()
{
    delete d;
}

void SetupMisc::readSettings()
{
    d->systemSettingsWidget->readSettings();

    d->showSplash->setChecked(d->settings->getShowSplash());
    d->nativeFileDialog->setChecked(d->settings->getNativeFileDialog());
    d->itemCenter->setChecked(d->settings->getItemCenter());
    d->showMimeOverImage->setChecked(d->settings->getShowFormatOverThumbnail());
    d->showCoordinates->setChecked(d->settings->getShowCoordinates());
    d->sidebarType->setCurrentIndex(d->settings->getRightSideBarStyle());
    d->sortOrderComboBox->setCurrentIndex(d->settings->getSortRole());
    d->sortReverse->setChecked(d->settings->getReverseSort());

#ifdef HAVE_APPSTYLE_SUPPORT

    d->applicationStyle->setCurrentIndex(d->applicationStyle->findData(d->settings->getApplicationStyle().toLower()));

#endif

    d->applicationIcon->setCurrentIndex(d->applicationIcon->findData(d->settings->getIconTheme()));
    d->applicationFont->setFont(d->settings->getApplicationFont());
}

void SetupMisc::applySettings()
{
    d->systemSettingsWidget->saveSettings();

    d->settings->setShowSplash(d->showSplash->isChecked());
    d->settings->setNativeFileDialog(d->nativeFileDialog->isChecked());
    d->settings->setItemCenter(d->itemCenter->isChecked());
    d->settings->setShowFormatOverThumbnail(d->showMimeOverImage->isChecked());
    d->settings->setShowCoordinates(d->showCoordinates->isChecked());
    d->settings->setRightSideBarStyle(d->sidebarType->currentIndex());
    d->settings->setSortRole(d->sortOrderComboBox->currentIndex());
    d->settings->setReverseSort(d->sortReverse->isChecked());

#ifdef HAVE_APPSTYLE_SUPPORT

    d->settings->setApplicationStyle(d->applicationStyle->currentText());

#endif

    d->settings->setIconTheme(d->applicationIcon->currentData().toString());
    d->settings->setApplicationFont(d->applicationFont->font());
    d->settings->syncConfig();
}

} // namespace ShowFoto
