/*
*  Copyright 2017  Smith AR <audoban@openmailbox.org>
*                  Michail Vourlakos <mvourlakos@gmail.com>
*
*  This file is part of Latte-Dock
*
*  Latte-Dock 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 of
*  the License, or (at your option) any later version.
*
*  Latte-Dock 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.
*
*  You should have received a copy of the GNU General Public License
*  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef LAYOUTSMANAGER_H
#define LAYOUTSMANAGER_H

// local
#include "launcherssignals.h"
#include "synchronizer.h"
#include "settings/settingsdialog.h"

// Qt
#include <QAction>
#include <QObject>
#include <QPointer>

// KDE
#include <KLocalizedString>

namespace Plasma {
class Containment;
class Types;
}

namespace Latte {
class Corona;
class CentralLayout;
namespace Layouts {
class Importer;
class LaunchersSignals;
class Synchronizer;
}
}

namespace Latte {
namespace Layouts {

//! Layouts::Manager is a very IMPORTANT class which is responsible to
//! to provide the qml accessible Layouts manipulation API and at the
//! same time to interact with Latte::Corona in order
//! to update correctly the underlying Layouts files by using also
//! its Importer object
//!
//! This class is responsible both for ACTIVE/PASSIVE Layouts.
//!
//! ACTIVE Layout is consider one layout that is loaded and active in memory
//! PASSIVE Layouts is consider one layout that is not loaded/active in memory
//! and its properties are just stored in the filesystem
//!

class Manager : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QString currentLayoutName READ currentLayoutName NOTIFY currentLayoutNameChanged)

    Q_PROPERTY(QStringList layouts READ layouts NOTIFY layoutsChanged)
    Q_PROPERTY(QStringList menuLayouts READ menuLayouts NOTIFY menuLayoutsChanged)

    Q_PROPERTY(LaunchersSignals *launchersSignals READ launchersSignals NOTIFY launchersSignalsChanged)

public:
    Manager(QObject *parent = nullptr);
    ~Manager() override;

    Latte::Corona *corona();
    Importer *importer();

    void load();
    void loadLayoutOnStartup(QString layoutName);
    void showInfoWindow(QString info, int duration, QStringList activities = {"0"});
    void unload();

    QString currentLayoutName() const;
    QString defaultLayoutName() const;

    QStringList layouts() const;
    QStringList menuLayouts() const;
    QStringList presetsPaths() const;
    QStringList storedSharedLayouts() const;

    Types::LayoutsMemoryUsage memoryUsage() const;
    void setMemoryUsage(Types::LayoutsMemoryUsage memoryUsage);

    //! returns the current and central layout based on activities and user preferences
    CentralLayout *currentLayout() const;
    LaunchersSignals *launchersSignals() const;
    Synchronizer *synchronizer() const;

    void importDefaultLayout(bool newInstanceIfPresent = false);
    void importPresets(bool includeDefault = false);

public slots:
    void showAboutDialog();

    void hideLatteSettingsDialog();
    Q_INVOKABLE void showLatteSettingsDialog(int page = Latte::Types::LayoutPage);

    //! switch to specified layout, default previousMemoryUsage means that it didn't change
    Q_INVOKABLE bool switchToLayout(QString layoutName, int previousMemoryUsage = -1);

    Q_INVOKABLE int layoutsMemoryUsage();

    //! creates a new layout with layoutName based on the preset
    Q_INVOKABLE QString newLayout(QString layoutName, QString preset = i18n("Default"));

    Q_INVOKABLE QStringList centralLayoutsNames();
    Q_INVOKABLE QStringList sharedLayoutsNames();

signals:
    void centralLayoutsChanged();
    void currentLayoutChanged();
    void currentLayoutNameChanged();
    void launchersSignalsChanged();
    void layoutsChanged();
    void menuLayoutsChanged();

    void currentLayoutIsSwitching(QString layoutName);

private:
    void cleanupOnStartup(QString path); //!remove deprecated or oldstyle config options
    void clearUnloadedContainmentsFromLinkedFile(QStringList containmentsIds, bool bypassChecks = false);

    //! it is used just in order to provide translations for the presets
    void ghostForTranslatedPresets();

    void importPreset(int presetNo, bool newInstanceIfPresent = false);
    void loadLatteLayout(QString layoutPath);

    void setMenuLayouts(QStringList layouts);

private:
    QStringList m_presetsPaths;

    QPointer<Latte::SettingsDialog> m_latteSettingsDialog;

    Latte::Corona *m_corona{nullptr};
    Importer *m_importer{nullptr};
    LaunchersSignals *m_launchersSignals{nullptr};
    Synchronizer *m_synchronizer{nullptr};

    friend class Latte::SettingsDialog;
    friend class Synchronizer;
};

}
}

#endif // LAYOUTSMANAGER_H