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#include "maemo6compass.h"

const char *maemo6compass::id("maemo6.compass");
bool maemo6compass::m_initDone = false;

maemo6compass::maemo6compass(QSensor *sensor)
    : maemo6sensorbase(sensor)
{
    setReading<QCompassReading>(&m_reading);

    if (!m_initDone) {
        initSensor<CompassSensorChannelInterface>("compasssensor");

        if (m_sensorInterface) {
            QObject::connect(static_cast<CompassSensorChannelInterface*>(m_sensorInterface), SIGNAL(levelChanged(const int&)), this, SLOT(slotLevelChanged(const int&)));
            QObject::connect(static_cast<CompassSensorChannelInterface*>(m_sensorInterface), SIGNAL(degreesChanged(const int&)), this, SLOT(slotDegreesChanged(const int&)));
        } else {
            qWarning() << "Unable to initialize compass sensor.";            
        }

        // metadata TODO accuracy
        addDataRate(43, 43); // 43Hz
        sensor->setDataRate(43);
        addOutputRange(0, 359, 1);
        setDescription(QLatin1String("Measures compass north in degrees"));
 
        m_initDone = true;
    }
}

void maemo6compass::slotLevelChanged(const int& level)
{
    // The scale for level is [0,3], where 3 is the best
    // Qt: Measured as a value from 0 to 1 with higher values being better.
    float l = ((float) level) / 3.0;

    qreal calibrationLevel = l;
    m_reading.setCalibrationLevel(calibrationLevel);
    //m_reading.setTimestamp(level.timestamp());
    m_reading.setTimestamp(createTimestamp()); //TODO: use correct timestamp
    newReadingAvailable();
}

void maemo6compass::slotDegreesChanged(const int& degrees)
{
    // The scale for degrees from sensord is [0,359]
    // Value can be directly used as azimuth
    qreal azimuth = degrees;
    m_reading.setAzimuth(azimuth);
    //m_reading.setTimestamp(degrees.timestamp());
    m_reading.setTimestamp(createTimestamp()); //TODO: use correct timestamp
    newReadingAvailable();
}