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#include "maemo6accelerometer.h"

const char *maemo6accelerometer::id("maemo6.accelerometer");
bool maemo6accelerometer::m_initDone = false;

maemo6accelerometer::maemo6accelerometer(QSensor *sensor)
    : maemo6sensorbase(sensor)
{
    setReading<QAccelerometerReading>(&m_reading);

    if (!m_initDone) {
        qDBusRegisterMetaType<XYZ>();

        initSensor<AccelerometerSensorChannelInterface>("accelerometersensor");

        if (m_sensorInterface)
            QObject::connect(static_cast<AccelerometerSensorChannelInterface*>(m_sensorInterface), SIGNAL(dataAvailable(const XYZ&)), this, SLOT(slotDataAvailable(const XYZ&)));
        else
            qWarning() << "Unable to initialize accelerometer sensor.";

        // adding metadata
        addDataRate(142, 142); // 142Hz
        sensor->setDataRate(142);
        //addDataRate(400, 400); // 400Hz

        // accuracy - or resolution???
        // 2^8 = 256    256/2 - 1 = 127
        addOutputRange(-2*GRAVITY_EARTH, 2*GRAVITY_EARTH, 2*GRAVITY_EARTH/127); // 2G
        addOutputRange(-8*GRAVITY_EARTH, 8*GRAVITY_EARTH, 8*GRAVITY_EARTH/127); // 8G
        setDescription(QLatin1String("Measures x, y, and z axes accelerations in m/s^2"));

        m_initDone = true;
    }
}

void maemo6accelerometer::slotDataAvailable(const XYZ& data)
{
    // Convert from milli-Gs to meters per second per second
    // Using 1 G = 9.80665 m/s^2
    qreal ax = -data.x() * GRAVITY_EARTH_THOUSANDTH;
    qreal ay = -data.y() * GRAVITY_EARTH_THOUSANDTH;
    qreal az = -data.z() * GRAVITY_EARTH_THOUSANDTH;

    m_reading.setX(ax);
    m_reading.setY(ay);
    m_reading.setZ(az);
    //m_reading.setTimestamp(data.timestamp());
    m_reading.setTimestamp(createTimestamp()); //TODO: use correct timestamp
    newReadingAvailable();
}