/****************************************************************************
**
** Copyright (C) 2016 Thorben Kroeger <thorbenkroeger@gmail.com>.
** 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 "themesettings.h"
#include "coreconstants.h"
#include "icore.h"

#include <utils/algorithm.h>

#include <QCoreApplication>
#include <QDebug>
#include <QDir>
#include <QSettings>

static const char themeNameKey[] = "ThemeName";

namespace Core {
namespace Internal {

ThemeEntry::ThemeEntry(Id id, const QString &filePath)
    : m_id(id)
    , m_filePath(filePath)
{
}

Id ThemeEntry::id() const
{
    return m_id;
}

QString ThemeEntry::displayName() const
{
    if (m_displayName.isEmpty() && !m_filePath.isEmpty()) {
        QSettings settings(m_filePath, QSettings::IniFormat);
        m_displayName = settings.value(QLatin1String(themeNameKey),
                                       QCoreApplication::tr("unnamed")).toString();
    }
    return m_displayName;
}

QString ThemeEntry::filePath() const
{
    return m_filePath;
}

static void addThemesFromPath(const QString &path, QList<ThemeEntry> *themes)
{
    static const QLatin1String extension("*.creatortheme");
    QDir themeDir(path);
    themeDir.setNameFilters(QStringList() << extension);
    themeDir.setFilter(QDir::Files);
    const QStringList themeList = themeDir.entryList();
    foreach (const QString &fileName, themeList) {
        QString id = QFileInfo(fileName).completeBaseName();
        themes->append(ThemeEntry(Id::fromString(id), themeDir.absoluteFilePath(fileName)));
    }
}

QList<ThemeEntry> ThemeEntry::availableThemes()
{
    QList<ThemeEntry> themes;

    static const QString installThemeDir = ICore::resourcePath() + QLatin1String("/themes");
    static const QString userThemeDir = ICore::userResourcePath() + QLatin1String("/themes");
    addThemesFromPath(installThemeDir, &themes);
    if (themes.isEmpty())
        qWarning() << "Warning: No themes found in installation: "
                   << QDir::toNativeSeparators(installThemeDir);
    // move default theme to front
    int defaultIndex = Utils::indexOf(themes, Utils::equal(&ThemeEntry::id, Id("default")));
    if (defaultIndex > 0) { // == exists and not at front
        ThemeEntry defaultEntry = themes.takeAt(defaultIndex);
        themes.prepend(defaultEntry);
    }
    addThemesFromPath(userThemeDir, &themes);
    return themes;
}

} // namespace Internal
} // namespace Core