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#include "qgeopositioninfosource_maemo5_p.h"

#include "liblocationwrapper_p.h"

using namespace std;

QTM_BEGIN_NAMESPACE

QGeoPositionInfoSourceMaemo::QGeoPositionInfoSourceMaemo(QObject *parent) 

    : QGeoPositionInfoSource(parent)

{

    // default values

    availableMethods = SatellitePositioningMethods;

    timerInterval = DEFAULT_UPDATE_INTERVAL;

    updateTimer = new QTimer(this);

    updateTimer->setSingleShot(true);

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

    requestTimer = new QTimer(this);

    requestTimer->setSingleShot(true);

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

    errorOccurred = false;

    errorSent = false;

    positionInfoState = QGeoPositionInfoSourceMaemo::Undefined;

}

int QGeoPositionInfoSourceMaemo::init()

{

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

        connect(LiblocationWrapper::instance(), SIGNAL(error()), this, SLOT(error()));

        return INIT_OK;

    } else {

        return INIT_FAILED;

    }

}

QGeoPositionInfo QGeoPositionInfoSourceMaemo::lastKnownPosition(bool fromSatellitePositioningMethodsOnly) const

{

    return (LiblocationWrapper::instance()->lastKnownPosition(fromSatellitePositioningMethodsOnly));

}

QGeoPositionInfoSource::PositioningMethods QGeoPositionInfoSourceMaemo::supportedPositioningMethods() const

{

    return availableMethods;

}

void QGeoPositionInfoSourceMaemo::setUpdateInterval(int msec)

{

    bool updateTimerInterval = false;

    if (positionInfoState & QGeoPositionInfoSourceMaemo::PowersaveActive)

        if (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)

            updateTimerInterval = true;

    if (!msec) {

        timerInterval = MINIMUM_UPDATE_INTERVAL;

        QGeoPositionInfoSource::setUpdateInterval(0);

    } else {

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

        QGeoPositionInfoSource::setUpdateInterval(timerInterval);

    }

    if (timerInterval >= POWERSAVE_THRESHOLD)

        positionInfoState |= QGeoPositionInfoSourceMaemo::PowersaveActive;

    else

        positionInfoState &= ~QGeoPositionInfoSourceMaemo::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 QGeoPositionInfoSourceMaemo::setPreferredPositioningMethods(PositioningMethods sources)

{

    Q_UNUSED(sources)

    return;

}

int QGeoPositionInfoSourceMaemo::minimumUpdateInterval() const

{

    return MINIMUM_UPDATE_INTERVAL;

}

// public slots:

void QGeoPositionInfoSourceMaemo::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)

        positionInfoState |= QGeoPositionInfoSourceMaemo::PowersaveActive;

    activateTimer();

}

void QGeoPositionInfoSourceMaemo::stopUpdates()

{

    positionInfoState &= ~QGeoPositionInfoSourceMaemo::PowersaveActive;

    if (!(positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive)) {

        updateTimer->stop();

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

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

    }

    errorOccurred = false;

    errorSent = false;

    positionInfoState &= ~QGeoPositionInfoSourceMaemo::Started;

    positionInfoState |= QGeoPositionInfoSourceMaemo::Stopped;

}

void QGeoPositionInfoSourceMaemo::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 (positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive)

            return;

        emit updateTimeout();

        return;

    } else {

        timeoutForRequest = timeout;

    }

    positionInfoState |= QGeoPositionInfoSourceMaemo::RequestActive;

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

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

    activateTimer();

    requestTimer->start(timeoutForRequest);

}

void QGeoPositionInfoSourceMaemo::newPositionUpdate()

{

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

        errorOccurred = false;

        errorSent = false;

        if (positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive) {

            positionInfoState &= ~QGeoPositionInfoSourceMaemo::RequestActive;

            requestTimer->stop();

            if (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)

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

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

            // Ensure that requested position fix is emitted even though

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

            if ((positionInfoState & QGeoPositionInfoSourceMaemo::PowersaveActive) &&

               (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)) {

                emit positionUpdated(LiblocationWrapper::instance()->position());

            }

        }

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

        // is no false position update.

        if (!((positionInfoState & QGeoPositionInfoSourceMaemo::PowersaveActive) &&

             (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)))

            emit positionUpdated(LiblocationWrapper::instance()->position());

    } else {

        // if an error occurs when we are updating periodically and we haven't 

        // sent an error since the last fix...

        if (!(positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive) && 

            errorOccurred && !errorSent) {

            errorSent = true;

            // we need to emit the updateTimeout signal

            emit updateTimeout();

        }

    }

    activateTimer();

}

void QGeoPositionInfoSourceMaemo::requestTimeoutElapsed()

{

    updateTimer->stop();

    emit updateTimeout();

    positionInfoState &= ~QGeoPositionInfoSourceMaemo::RequestActive;

    if (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)

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

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

    activateTimer();

}

void QGeoPositionInfoSourceMaemo::error()

{

    errorOccurred = true;

}

void QGeoPositionInfoSourceMaemo::activateTimer() {

    if (positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive) {

        updateTimer->start(MINIMUM_UPDATE_INTERVAL);

        return;

    }

    if (positionInfoState & QGeoPositionInfoSourceMaemo::PowersaveActive) {

        if (positionInfoState & QGeoPositionInfoSourceMaemo::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);

            errorOccurred = false;

            errorSent = false;

            positionInfoState &= ~QGeoPositionInfoSourceMaemo::Started;

            positionInfoState |= QGeoPositionInfoSourceMaemo::Stopped;

        } else if (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped) {

            startLocationDaemon();

            updateTimer->start(POWERSAVE_POWERON_PERIOD);

        }

        return;

    }

    if (positionInfoState & QGeoPositionInfoSourceMaemo::Started)

        updateTimer->start(timerInterval);

}

void QGeoPositionInfoSourceMaemo::startLocationDaemon() {

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

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

    positionInfoState |= QGeoPositionInfoSourceMaemo::Started;

    positionInfoState &= ~QGeoPositionInfoSourceMaemo::Stopped;

}

#include "moc_qgeopositioninfosource_maemo5_p.cpp"

QTM_END_NAMESPACE