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****************************************************************************/

#include "qgeosatelliteinfosource_maemo5_p.h"

#include "liblocationwrapper_p.h"

QTM_BEGIN_NAMESPACE

QGeoSatelliteInfoSourceMaemo::QGeoSatelliteInfoSourceMaemo(QObject *parent) 

    : QGeoSatelliteInfoSource(parent)

{

    client_id_ = -1;

    timerInterval = DEFAULT_UPDATE_INTERVAL;

    updateTimer = new QTimer(this);

    updateTimer->setSingleShot(true);

    connect(updateTimer, SIGNAL(timeout()), this, SLOT(satelliteStatus()));

    requestTimer = new QTimer(this);

    requestTimer->setSingleShot(true);

    connect(requestTimer, SIGNAL(timeout()), this, SLOT(requestTimeoutElapsed()));

    satelliteInfoState = QGeoSatelliteInfoSourceMaemo::Undefined;

}

int QGeoSatelliteInfoSourceMaemo::init()

{

    if (LiblocationWrapper::instance()->inited())

        return INIT_OK;

    else

        return INIT_FAILED;

}

void QGeoSatelliteInfoSourceMaemo::setUpdateInterval(int msec)

{

    bool updateTimerInterval = false;

    if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::PowersaveActive)

        if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::Stopped)

            updateTimerInterval = true;

    timerInterval = (msec < MINIMUM_UPDATE_INTERVAL) ? MINIMUM_UPDATE_INTERVAL : msec;

    if (timerInterval >= POWERSAVE_THRESHOLD)

        satelliteInfoState |= QGeoSatelliteInfoSourceMaemo::PowersaveActive;

    else

        satelliteInfoState &= ~QGeoSatelliteInfoSourceMaemo::PowersaveActive;

    // If powersave has been active when new update interval has been set,

    // ensure that timer is started.

    if(updateTimerInterval)

        startLocationDaemon();

    // Ensure that new timer interval is taken into use immediately.

    activateTimer();

}

void QGeoSatelliteInfoSourceMaemo::startUpdates()

{

    startLocationDaemon();

    // Ensure that powersave is selected, if stopUpdates() has been called,

    // but selected update interval is still greater than POWERSAVE_THRESHOLD.

    if (timerInterval >= POWERSAVE_THRESHOLD)

        satelliteInfoState |= QGeoSatelliteInfoSourceMaemo::PowersaveActive;

    activateTimer();

}

void QGeoSatelliteInfoSourceMaemo::stopUpdates()

{

    satelliteInfoState &= ~QGeoSatelliteInfoSourceMaemo::PowersaveActive;

    if (!(satelliteInfoState & QGeoSatelliteInfoSourceMaemo::RequestActive)) {

        updateTimer->stop();

        if (LiblocationWrapper::instance()->isActive())

            LiblocationWrapper::instance()->stop();

    }

    satelliteInfoState &= ~QGeoSatelliteInfoSourceMaemo::Started;

    satelliteInfoState |= QGeoSatelliteInfoSourceMaemo::Stopped;

}

void QGeoSatelliteInfoSourceMaemo::requestUpdate(int timeout)

{

    int timeoutForRequest = 0;

    if (!timeout) {

        if (LiblocationWrapper::instance()->isActive())

            // If GPS is active, assume quick fix.

            timeoutForRequest = DEFAULT_UPDATE_INTERVAL;

        else

            // Otherwise reserve longer time to get a fix.

            timeoutForRequest = POWERSAVE_POWERON_PERIOD;

    } else if (timeout < MINIMUM_UPDATE_INTERVAL) {

        if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::RequestActive)

            return;

        emit requestTimeout();

        return;

    } else {

        timeoutForRequest = timeout;

    }

    satelliteInfoState |= QGeoSatelliteInfoSourceMaemo::RequestActive;

    if (!(LiblocationWrapper::instance()->isActive()))

        LiblocationWrapper::instance()->start();

    activateTimer();

    requestTimer->start(timeoutForRequest);

}

void QGeoSatelliteInfoSourceMaemo::satelliteStatus()

{

    QList<QGeoSatelliteInfo> satellitesInView = 

            LiblocationWrapper::instance()->satellitesInView();

    QList<QGeoSatelliteInfo> satellitesInUse = 

            LiblocationWrapper::instance()->satellitesInUse();

    if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::RequestActive) {

        satelliteInfoState &= ~QGeoSatelliteInfoSourceMaemo::RequestActive;

        requestTimer->stop();

        if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::Stopped) {

            if (LiblocationWrapper::instance()->isActive()) {

                LiblocationWrapper::instance()->stop();

            }

        }

        // Ensure that requested satellite info is emitted even though

        // powersave is active and GPS would normally be off.

        if ((satelliteInfoState & QGeoSatelliteInfoSourceMaemo::PowersaveActive) &&

           (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::Stopped)) {

            if (satellitesInView.length()) {

                emit satellitesInViewUpdated(satellitesInView);

                emit satellitesInUseUpdated(satellitesInUse);

            }

        }

    }

    // Make sure that if update is triggered when waking up, there

    // is no false position update.

    if (!((satelliteInfoState & QGeoSatelliteInfoSourceMaemo::PowersaveActive) &&

         (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::Stopped))) {

        if (satellitesInView.length()) {

            emit satellitesInViewUpdated(satellitesInView);

            emit satellitesInUseUpdated(satellitesInUse);

        }

    }

    activateTimer();

}

void QGeoSatelliteInfoSourceMaemo::requestTimeoutElapsed()

{

    updateTimer->stop();

    emit requestTimeout();

    satelliteInfoState &= ~QGeoSatelliteInfoSourceMaemo::RequestActive;

    if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::Stopped)

        if (LiblocationWrapper::instance()->isActive())

            LiblocationWrapper::instance()->stop();

    activateTimer();

}

void QGeoSatelliteInfoSourceMaemo::activateTimer() {

    if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::RequestActive) {

        updateTimer->start(MINIMUM_UPDATE_INTERVAL);

        return;

    }

    if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::PowersaveActive) {

        if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::Started) {

            // Cannot call stopUpdates() here since we want to keep powersave

            // active.

            if (LiblocationWrapper::instance()->isActive())

                LiblocationWrapper::instance()->stop();

            updateTimer->start(timerInterval - POWERSAVE_POWERON_PERIOD);

            satelliteInfoState &= ~QGeoSatelliteInfoSourceMaemo::Started;

            satelliteInfoState |= QGeoSatelliteInfoSourceMaemo::Stopped;

        } else if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::Stopped) {

            startLocationDaemon();

            updateTimer->start(POWERSAVE_POWERON_PERIOD);

        }

        return;

    }

    if (satelliteInfoState & QGeoSatelliteInfoSourceMaemo::Started)

            updateTimer->start(timerInterval);

}

void QGeoSatelliteInfoSourceMaemo::startLocationDaemon() {

    if (!(LiblocationWrapper::instance()->isActive()))

        LiblocationWrapper::instance()->start();

    satelliteInfoState |= QGeoSatelliteInfoSourceMaemo::Started;

    satelliteInfoState &= ~QGeoSatelliteInfoSourceMaemo::Stopped;

}

#include "moc_qgeosatelliteinfosource_maemo5_p.cpp"

QTM_END_NAMESPACE