/*!
 * Copyright (C) 2020 by Savoir-faire Linux
 * Author: Edric Ladent Milaret <edric.ladent-milaret@savoirfairelinux.com>
 * Author: Andreas Traczyk <andreas.traczyk@savoirfairelinux.com>
 * Author: Mingrui Zhang <mingrui.zhang@savoirfairelinux.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 3 of the License, 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#pragma once

#include "lrcinstance.h"

#include <QFile>
#include <QApplication>
#include <QQmlApplicationEngine>
#include <QQmlEngine>
#include <QScreen>
#include <QWindow>

#include <memory>

class ConnectivityMonitor;
class AppSettingsManager;
class SystemTray;
class CallAdapter;

// Provides information about the screen the app is displayed on
class ScreenInfo : public QObject
{
    Q_OBJECT
    Q_PROPERTY(double devicePixelRatio MEMBER devicePixelRatio_ NOTIFY devicePixelRatioChanged)
public:
    void setCurrentFocusWindow(QWindow* window);
    void setDevicePixelRatio(double ratio)
    {
        if (ratio != devicePixelRatio_) {
            devicePixelRatio_ = ratio;

            Q_EMIT devicePixelRatioChanged();
        }
    }

Q_SIGNALS:
    void devicePixelRatioChanged();

private:
    double devicePixelRatio_ {0.0};

    QMetaObject::Connection currentFocusWindowScreenConnection_;
    QMetaObject::Connection devicePixelRatioConnection_;

    QWindow* currentFocusWindow_ {nullptr};
    QScreen* currentFocusWindowScreen_ {nullptr};
};

class MainApplication : public QApplication
{
    Q_OBJECT

public:
    explicit MainApplication(int& argc, char** argv);
    ~MainApplication();

    bool init();
    void restoreApp();

private:
    void vsConsoleDebug();
    void fileDebug(QFile* debugFile);

    void loadTranslations();
    void initLrc(const QString& downloadUrl, ConnectivityMonitor* cm, bool muteDaemon);
    const QVariantMap parseArguments();
    void setApplicationFont();
    void initQmlLayer();
    void initSystray();
    void cleanup();

private:
    QScopedPointer<QFile> debugFile_;
    QScopedPointer<QQmlApplicationEngine> engine_;

    QScopedPointer<LRCInstance> lrcInstance_;

    QScopedPointer<ConnectivityMonitor> connectivityMonitor_;
    QScopedPointer<AppSettingsManager> settingsManager_;
    QScopedPointer<SystemTray> systemTray_;

    ScreenInfo screenInfo_;

    CallAdapter* callAdapter_;
};
