/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtPositioning module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** ensure the GNU Lesser General Public License version 3 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
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****************************************************************************/

#include "qgeopositioninfosource_simulator_p.h"
#include "qlocationdata_simulator_p.h"
#include "qlocationconnection_simulator_p.h"

#include <QtCore/QDebug>
#include <QtCore/QTimer>
#include <QtCore/QDataStream>

#include <QtNetwork/QLocalSocket>

QT_BEGIN_NAMESPACE

namespace Simulator
{
    QGeoPositionInfo toPositionInfo(const QGeoPositionInfoData &data)
    {
        QDateTime timestamp;
        if (data.dateTime.isValid())
            timestamp = data.dateTime;
        else
            timestamp = QDateTime::currentDateTime();
        QGeoCoordinate coord(data.latitude, data.longitude, data.altitude);
        QGeoPositionInfo info(coord, timestamp);
        info.setAttribute(QGeoPositionInfo::Direction, data.direction);
        info.setAttribute(QGeoPositionInfo::GroundSpeed, data.groundSpeed);
        info.setAttribute(QGeoPositionInfo::VerticalSpeed, data.verticalSpeed);
        info.setAttribute(QGeoPositionInfo::MagneticVariation, data.magneticVariation);
        info.setAttribute(QGeoPositionInfo::HorizontalAccuracy, data.horizontalAccuracy);
        info.setAttribute(QGeoPositionInfo::VerticalAccuracy, data.verticalAccuracy);
        return info;
    }
} //namespace

// Location API

QGeoPositionInfoSourceSimulator::QGeoPositionInfoSourceSimulator(QObject *parent)
    : QGeoPositionInfoSource(parent)
    , timer(new QTimer(this))
    , requestTimer(new QTimer(this))
    , m_positionError(QGeoPositionInfoSource::NoError)
{
    Simulator::LocationConnection::ensureSimulatorConnection();

    connect(timer, SIGNAL(timeout()), this, SLOT(updatePosition()));
    requestTimer->setSingleShot(true);
    connect(requestTimer, SIGNAL(timeout()), this, SLOT(updatePosition()));
}

QGeoPositionInfoSourceSimulator::~QGeoPositionInfoSourceSimulator()
{
}

QGeoPositionInfo QGeoPositionInfoSourceSimulator::lastKnownPosition(bool /*fromSatellitePositioningMethodsOnly*/) const
{
    return lastPosition;
}

QGeoPositionInfoSource::PositioningMethods QGeoPositionInfoSourceSimulator::supportedPositioningMethods() const
{
    // Is GPS now Satelite or not? Guessing so...
    return QGeoPositionInfoSource::SatellitePositioningMethods;
}

void QGeoPositionInfoSourceSimulator::setUpdateInterval(int msec)
{
    // If msec is 0 we send updates as data becomes available, otherwise we force msec to be equal
    // to or larger than the minimum update interval.
    if (msec != 0 && msec < minimumUpdateInterval())
        msec = minimumUpdateInterval();

    QGeoPositionInfoSource::setUpdateInterval(msec);
    if (timer->isActive()) {
        timer->setInterval(msec);
        timer->start();
    }
}

int QGeoPositionInfoSourceSimulator::minimumUpdateInterval() const
{
    return qtPositionInfo()->minimumInterval;
}

void QGeoPositionInfoSourceSimulator::startUpdates()
{
    int interval = updateInterval();
    if (interval < minimumUpdateInterval())
        interval = minimumUpdateInterval();
    timer->setInterval(interval);
    timer->start();
}

void QGeoPositionInfoSourceSimulator::stopUpdates()
{
    timer->stop();
}

void QGeoPositionInfoSourceSimulator::requestUpdate(int timeout)
{
    if (!requestTimer->isActive()) {
        // Get a single update within timeframe
        if (timeout < minimumUpdateInterval() && timeout != 0)
            emit updateTimeout();
        else {
            requestTimer->start(timeout * qreal(0.75));
        }
    }
}

void QGeoPositionInfoSourceSimulator::updatePosition()
{
    if (qtPositionInfo()->enabled) {
        lastPosition = Simulator::toPositionInfo(*qtPositionInfo());
        emit positionUpdated(lastPosition);
    } else {
        emit updateTimeout();
    }
}

QGeoPositionInfoSource::Error QGeoPositionInfoSourceSimulator::error() const
{
    return m_positionError;
}


void QGeoPositionInfoSourceSimulator::setError(QGeoPositionInfoSource::Error positionError)
{
    m_positionError = positionError;
    emit QGeoPositionInfoSource::error(positionError);
}

QT_END_NAMESPACE