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#include "gruesensorimpl.h"

#include <QDebug>

const char *gruesensorimpl::id("grue.gruesensor");

gruesensorimpl::gruesensorimpl(QSensor *sensor)

    : QSensorBackend(sensor)

{

    lightSensor = new QAmbientLightSensor(this);

    lightSensor->setUpdatePolicy(QSensor::OccasionalUpdates);

    lightSensor->addFilter(this);

    setSupportedUpdatePolicies(QSensor::OnChangeUpdates | QSensor::OccasionalUpdates);

    setReading<GrueSensorReading>(&m_reading);

}

void gruesensorimpl::start()

{

    lightSensor->start();

}

void gruesensorimpl::stop()

{

    lightSensor->stop();

}

void gruesensorimpl::poll()

{

    lightSensor->poll();

}

bool gruesensorimpl::filter(QAmbientLightReading *reading)

{

    qreal chance;

    switch (reading->lightLevel()) {

    case QAmbientLightReading::Undefined:

        chance = 0.5; // No idea... call it 50/50

        break;

    case QAmbientLightReading::Dark:

        chance = 1.0;

        break;

    case QAmbientLightReading::Twilight:

        chance = 0.1;

        break;

    default:

        chance = 0.0;

        break;

    }

    if (QSensorBackend::m_sensor->updatePolicy() == QSensor::OccasionalUpdates ||

            chance != m_reading.chanceOfBeingEaten()) {

        m_reading.setTimestamp(reading->timestamp());

        m_reading.setChanceOfBeingEaten(chance);

        newReadingAvailable();

    }

    return true;

}