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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef SATELLITEMODEL_H
#define SATELLITEMODEL_H

#include <QAbstractListModel>
#include <QSet>
#include <QtQml/qqml.h>
#include <QtQml/QQmlParserStatus>
#include <QtPositioning/QGeoSatelliteInfoSource>

QT_FORWARD_DECLARE_CLASS(QTimer)
QT_FORWARD_DECLARE_CLASS(QGeoSatelliteInfoSource)

class SatelliteModel : public QAbstractListModel, public QQmlParserStatus
{
    Q_OBJECT
    Q_PROPERTY(bool running READ running WRITE setRunning NOTIFY runningChanged)
    Q_PROPERTY(bool satelliteInfoAvailable READ canProvideSatelliteInfo NOTIFY canProvideSatelliteInfoChanged)
    Q_PROPERTY(int entryCount READ entryCount NOTIFY entryCountChanged)
    Q_PROPERTY(bool singleRequestMode READ isSingleRequest WRITE setSingleRequest NOTIFY singleRequestChanged)
    Q_INTERFACES(QQmlParserStatus)
public:
    explicit SatelliteModel(QObject *parent = 0);

    enum {
        IdentifierRole = Qt::UserRole + 1,
        InUseRole,
        SignalStrengthRole,
        ElevationRole,
        AzimuthRole
    };

    //From QAbstractListModel
    int rowCount(const QModelIndex &parent) const;
    QVariant data(const QModelIndex &index, int role) const;
    QHash<int, QByteArray> roleNames() const;

    //From QQmlParserStatus
    void classBegin() {}
    void componentComplete();

    bool running() const;
    void setRunning(bool isActive);

    bool isSingleRequest() const;
    void setSingleRequest(bool single);

    int entryCount() const;

    bool canProvideSatelliteInfo() const;

signals:
    void runningChanged();
    void entryCountChanged();
    void errorFound(int code);
    void canProvideSatelliteInfoChanged();
    void singleRequestChanged();

public slots:
    void clearModel();
    void updateDemoData();

private slots:
    void error(QGeoSatelliteInfoSource::Error);
    void satellitesInViewUpdated(const QList<QGeoSatelliteInfo> &infos);
    void satellitesInUseUpdated(const QList<QGeoSatelliteInfo> &infos);

private:
    QGeoSatelliteInfoSource *source;
    bool m_componentCompleted;
    bool m_running;
    bool m_runningRequested;
    QList <QGeoSatelliteInfo> knownSatellites;
    QSet<int> knownSatelliteIds;
    QSet<int> satellitesInUse;
    bool demo;
    QTimer *timer;
    bool isSingle;
    bool singleRequestServed;

};

QML_DECLARE_TYPE(SatelliteModel)

#endif // SATELLITEMODEL_H