/****************************************************************************
**
** Copyright (C) 2013 Tomasz Olszak
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtSensors module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** General Public License version 3.0 as published by the Free Software
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** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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****************************************************************************/

#include "tizenproximity.h"

char const *const TizenProximity::id("tizen.proximity");

static void tizen_proximity_cb(unsigned long long timestamp, float distance, void* user_data) {
    TizenProximity *tizenProximity = static_cast<TizenProximity*>(user_data);
    Q_CHECK_PTR(tizenProximity);
    tizenProximity->update(timestamp, distance);
}

TizenProximity::TizenProximity(QSensor *sensor, QObject *parent) :
    TizenSensorBase(sensor, SENSOR_PROXIMITY, parent)
{
    int intervalInMs = 1000;

    if (sensor->dataRate() > 0)
        intervalInMs = 1000 / sensor->dataRate();

    setReading<QProximityReading>(&m_reading);

    sensor_error_e result = sensor_error_e(sensor_proximity_set_cb(m_sensor, intervalInMs, tizen_proximity_cb, this));
    printErrorMessage(QStringLiteral("Error while setting %1 sensor callback").arg(m_sensorDescription), result);
}

TizenProximity::~TizenProximity()
{
    sensor_error_e result = sensor_error_e(sensor_proximity_unset_cb(m_sensor));
    printErrorMessage(QStringLiteral("Error while unsetting %1 sensor callback").arg(m_sensorDescription), result);
}

void TizenProximity::start()
{
    TizenSensorBase::start();
    if (m_sensor) {
        float distance;
        sensor_error_e result = sensor_error_e(sensor_proximity_read_data(m_sensor, &distance));
        if (wasError(result)) {
            printErrorMessage(QStringLiteral("Error while getting %1 sensor data").arg(m_sensorDescription), result);
        } else {
            update(0, distance);
        }
    }
}


void TizenProximity::update(quint64 timestamp, float distance)
{
    m_reading.setTimestamp(timestamp);
    //determined empirically
    m_reading.setClose(distance < 3);
    m_reading.setProperty("distance",distance);
    TIZENSENSORLOG() << "distance:" << m_reading.property("distance") << ", close:" << m_reading.close();
    newReadingAvailable();
}

void TizenProximity::onDataRateChanged()
{
    TIZENSENSORLOG() << "Changing data rate to:" << sensor()->dataRate();
    if (m_sensor) {
        sensor_error_e result = sensor_error_e(sensor_proximity_set_interval(m_sensor, sensor()->dataRate()));
        printErrorMessage(QStringLiteral("Error while changing interval for %1 sensor").arg(m_sensorDescription), result);
    }
}