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#include "qdeclarativebackgroundaudio_p.h"
#include <qmediabackgroundplaybackcontrol.h>
#include <qmediaservice.h>

void QDeclarativeBackgroundAudio::classBegin()
{
    setObject(this, Q_MEDIASERVICE_BACKGROUNDMEDIAPLAYER);
    if (m_mediaService) {
        m_backgroundPlaybackControl =
                static_cast<QMediaBackgroundPlaybackControl*>(
                        m_mediaService->requestControl(QMediaBackgroundPlaybackControl_iid));
        if (m_backgroundPlaybackControl) {
            connect(m_backgroundPlaybackControl, SIGNAL(acquired()), this, SIGNAL(acquiredChanged()));
            connect(m_backgroundPlaybackControl, SIGNAL(lost()), this, SIGNAL(acquiredChanged()));
        } else {
            qWarning("can not get QMediaBackgroundPlaybackControl!");
        }
    } else {
        qWarning("Unable to get any background mediaplayer!");
    }
    emit mediaObjectChanged();

    //Note: we are not calling QDeclarativeAudio::classBegin here,
    //otherwise there will be conflict for setObject().
}

void QDeclarativeBackgroundAudio::componentComplete()
{
    QDeclarativeAudio::componentComplete();
}

QDeclarativeBackgroundAudio::QDeclarativeBackgroundAudio(QObject *parent)
    : QDeclarativeAudio(parent)
    , m_backgroundPlaybackControl(0)
{

}

QDeclarativeBackgroundAudio::~QDeclarativeBackgroundAudio()
{
    if (m_backgroundPlaybackControl)
        m_mediaService->releaseControl(m_backgroundPlaybackControl);
}

/*!
    \qmlproperty string BackgroundAudio::contextId

    This property holds the unique contextId for the application

    When a new contextId is set, the previously set contextId will be released automatically.
*/
QString QDeclarativeBackgroundAudio::contextId() const
{
    return m_contextId;
}

void QDeclarativeBackgroundAudio::setContextId(QString contextId)
{
    if (m_contextId == contextId)
        return;
    m_contextId = contextId;
    if (m_backgroundPlaybackControl)
        m_backgroundPlaybackControl->setContextId(m_contextId);
    emit contextIdChanged();
}

/*!
    \qmlproperty bool BackgroundAudio::acquired

    This property indicates whether the application holds the playback resource in music daemon
*/
bool QDeclarativeBackgroundAudio::isAcquired() const
{
    if (!m_backgroundPlaybackControl)
        return false;
    return m_backgroundPlaybackControl->isAcquired();
}

/*!
    \qmlmethod BackgroundAudio::acquire()

    try to acquire the playback resource in music daemon
*/
void QDeclarativeBackgroundAudio::acquire()
{
    if (isAcquired() || !m_backgroundPlaybackControl)
        return;
    m_backgroundPlaybackControl->acquire();
}

/*!
    \qmlmethod BackgroundAudio::acquire()

    try to release the playback resource in music daemon
*/
void QDeclarativeBackgroundAudio::release()
{
    if (!isAcquired() || !m_backgroundPlaybackControl)
        return;
    m_backgroundPlaybackControl->release();
}