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#include <QMovie>
#include <QtDeclarative/qmlcontext.h>
#include <QtDeclarative/qmlengine.h>
#include "qfxanimatedimageitem.h"
#include "qfxanimatedimageitem_p.h"
#include <QNetworkRequest>
#include <QNetworkReply>

QT_BEGIN_NAMESPACE

/*!
    \class QFxAnimatedImageItem
    \internal
*/

/*!
    \qmlclass AnimatedImage
    \inherits Image

    This item provides for playing animations stored as images containing a series of frames,
    such as GIF files. The full list of supported formats can be determined with
    QMovie::supportedFormats().

    \table
    \row 
    \o \image animatedimageitem.gif
    \o
    \qml
Item {
    width: anim.width; height: anim.height+8
    AnimatedImage { id: anim; source: "pics/games-anim.gif" }
    Rect { color: "red"; width: 4; height: 8; y: anim.height
        x: (anim.width-width)*anim.currentFrame/(anim.frameCount-1)
    }
}
    \endqml
    \endtable
*/
QML_DEFINE_TYPE(QFxAnimatedImageItem, AnimatedImage)

QFxAnimatedImageItem::QFxAnimatedImageItem(QFxItem *parent)
    : QFxImage(*(new QFxAnimatedImageItemPrivate), parent)
{
}

QFxAnimatedImageItem::QFxAnimatedImageItem(QFxAnimatedImageItemPrivate &dd, QFxItem *parent)
    : QFxImage(dd, parent)
{
}

QFxAnimatedImageItem::~QFxAnimatedImageItem()
{
    Q_D(QFxAnimatedImageItem);
    delete d->_movie;
}

/*!
  \qmlproperty bool AnimatedImage::paused
  This property holds whether the animated image is paused or not

  Defaults to false, and can be set to true when you want to pause.
*/
bool QFxAnimatedImageItem::isPaused() const
{
    Q_D(const QFxAnimatedImageItem);
    if(!d->_movie)
        return false;
    return d->_movie->state()==QMovie::Paused;
}

void QFxAnimatedImageItem::setPaused(bool pause)
{
    Q_D(QFxAnimatedImageItem);
    if(pause == d->paused)
        return;
    d->paused = pause;
    if(!d->_movie)
        return;
    d->_movie->setPaused(pause);
}
/*!
  \qmlproperty bool AnimatedImage::playing
  This property holds whether the animated image is playing or not

  Defaults to true, so as to start playing immediately.
*/
bool QFxAnimatedImageItem::isPlaying() const
{
    Q_D(const QFxAnimatedImageItem);
    if (!d->_movie)
        return false;
    return d->_movie->state()!=QMovie::NotRunning;
}

void QFxAnimatedImageItem::setPlaying(bool play)
{
    Q_D(QFxAnimatedImageItem);
    if(play == d->playing)
        return;
    d->playing = play;
    if (!d->_movie)
        return;
    if (play)
        d->_movie->start();
    else
        d->_movie->stop();
}

/*!
  \qmlproperty int AnimatedImage::currentFrame
  \qmlproperty int AnimatedImage::frameCount

  currentFrame is the frame that is currently visible. Watching when this changes can
  allow other things to animate at the same time as the image. frameCount is the number
  of frames in the animation. For some animation formats, frameCount is unknown and set to zero.
*/
int QFxAnimatedImageItem::currentFrame() const
{
    Q_D(const QFxAnimatedImageItem);
    if (!d->_movie)
        return -1;
    return d->_movie->currentFrameNumber();
}

void QFxAnimatedImageItem::setCurrentFrame(int frame)
{
    Q_D(QFxAnimatedImageItem);
    if (!d->_movie)
        return;
    d->_movie->jumpToFrame(frame);
}

int QFxAnimatedImageItem::frameCount() const
{
    Q_D(const QFxAnimatedImageItem);
    if (!d->_movie)
        return 0;
    return d->_movie->frameCount();
}

void QFxAnimatedImageItem::setSource(const QUrl &url)
{
    Q_D(QFxAnimatedImageItem);
    if (url == d->url)
        return;

    delete d->_movie;
    d->_movie = 0;

    if (d->reply) {
        d->reply->deleteLater();
        d->reply = 0;
    }

    d->url = qmlContext(this)->resolvedUrl(url);

    if (url.isEmpty()) {
        delete d->_movie;
        d->status = Idle;
    } else {
        d->status = Loading;
        QNetworkRequest req(d->url);
        req.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
        d->reply = qmlContext(this)->engine()->networkAccessManager()->get(req);
        QObject::connect(d->reply, SIGNAL(finished()),
                         this, SLOT(movieRequestFinished()));
    }

    emit statusChanged(d->status);
}

void QFxAnimatedImageItem::movieRequestFinished()
{
    Q_D(QFxAnimatedImageItem);
    d->_movie = new QMovie(d->reply);
    if (!d->_movie->isValid()){
        qWarning() << "Error Reading Animated Image File " << d->url;
        delete d->_movie;
        d->_movie = 0;
        return;
    }
    connect(d->_movie, SIGNAL(stateChanged(QMovie::MovieState)),
            this, SLOT(playingStatusChanged()));
    connect(d->_movie, SIGNAL(frameChanged(int)),
            this, SLOT(movieUpdate()));
    d->_movie->setCacheMode(QMovie::CacheAll);
    if(d->playing)
        d->_movie->start();
    else
        d->_movie->jumpToFrame(0);
    if(d->paused)
        d->_movie->setPaused(true);
    setPixmap(d->_movie->currentPixmap());
}

void QFxAnimatedImageItem::movieUpdate()
{
    Q_D(QFxAnimatedImageItem);
    setPixmap(d->_movie->currentPixmap());
    emit frameChanged();
}

void QFxAnimatedImageItem::playingStatusChanged()
{
    Q_D(QFxAnimatedImageItem);
    if((d->_movie->state() != QMovie::NotRunning) != d->playing){
        d->playing = (d->_movie->state() != QMovie::NotRunning);
        emit playingChanged();
    }
    if((d->_movie->state() == QMovie::Paused) != d->paused){
        d->playing = (d->_movie->state() == QMovie::Paused);
        emit pausedChanged();
    }
}

QT_END_NAMESPACE