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#include "maemo6als.h"

const char *maemo6als::id("maemo6.als");
bool maemo6als::m_initDone = false;

maemo6als::maemo6als(QSensor *sensor)
    : maemo6sensorbase(sensor)
{
    setReading<QAmbientLightReading>(&m_reading);
    if (!m_initDone) {
        initSensor<ALSSensorChannelInterface>("alssensor");

        if (m_sensorInterface)
            QObject::connect(static_cast<const ALSSensorChannelInterface*>(m_sensorInterface), SIGNAL(ALSChanged(const Unsigned&)), this, SLOT(slotDataAvailable(const Unsigned&)));
        else
            qWarning() << "Unable to initialize ambient light sensor.";

        // metadata
        addDataRate(1, 1); // 1Hz
        sensor->setDataRate(1);
        addOutputRange(0, 5, 1);
        setDescription(QLatin1String("Measures ambient light intensity given as 5 pre-defined levels"));

        m_initDone = true;
    }
}

void maemo6als::slotDataAvailable(const Unsigned& data)
{
    // Convert from integer to fixed levels
    // TODO: verify levels
    QAmbientLightReading::LightLevel level;
    int x = data.x();
    if (x < 0) {
        level = QAmbientLightReading::Undefined;
    } else if (x < 10) {
        level = QAmbientLightReading::Dark;
    } else if (x < 50) {
        level = QAmbientLightReading::Twilight;
    } else if (x < 100) {
        level = QAmbientLightReading::Light;
    } else if (x < 150) {
        level = QAmbientLightReading::Bright;
    } else {
        level = QAmbientLightReading::Sunny;
    }
    if (level != m_reading.lightLevel()) {
        m_reading.setLightLevel(level);
        m_reading.setTimestamp(data.UnsignedData().timestamp_);
        newReadingAvailable();
    }
}