/* This file is part of the KDE libraries
   SPDX-FileCopyrightText: 2003 Carsten Pfeiffer <pfeiffer@kde.org>
   SPDX-FileCopyrightText: 2006 Matthias Kretz <kretz@kde.org>

   SPDX-License-Identifier: LGPL-2.0-only
*/

#include "kfileaudiopreview.h"

#include <QCheckBox>
#include <QGroupBox>
#include <QLayout>

#define TRANSLATION_DOMAIN "kfileaudiopreview6"
#include <KConfig>
#include <KConfigGroup>
#include <KLocalizedString>
#include <KPluginFactory>
#include <KSharedConfig>

#include "mediacontrols.h"
#include <phonon/audiooutput.h>
#include <phonon/backendcapabilities.h>
#include <phonon/mediaobject.h>
#include <phonon/path.h>
#include <phonon/videowidget.h>

K_PLUGIN_FACTORY(KFileAudioPreviewFactory, registerPlugin<KFileAudioPreview>();)

#define ConfigGroup QStringLiteral("Audio Preview Settings")

///////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////

using namespace Phonon;

class KFileAudioPreview::Private
{
public:
    Private()
        : player(nullptr)
        , audioOutput(nullptr)
        , videoWidget(nullptr)
    {
    }

    MediaObject *player;
    AudioOutput *audioOutput;
    VideoWidget *videoWidget;
    MediaControls *controls;
};

KFileAudioPreview::KFileAudioPreview(QWidget *parent, const QVariantList &)
    : KPreviewWidgetBase(parent)
    , d(new Private)
{
    setSupportedMimeTypes(BackendCapabilities::availableMimeTypes());

    d->audioOutput = new AudioOutput(Phonon::NoCategory, this);

    d->videoWidget = new VideoWidget(this);
    d->videoWidget->hide();

    d->controls = new MediaControls(this);
    d->controls->setEnabled(false);
    d->controls->setAudioOutput(d->audioOutput);

    m_autoPlay = new QCheckBox(i18n("Play &automatically"), this);
    KConfigGroup config(KSharedConfig::openConfig(), ConfigGroup);
    m_autoPlay->setChecked(config.readEntry("Autoplay", false));
    connect(m_autoPlay, &QCheckBox::toggled, this, &KFileAudioPreview::toggleAuto);

    QVBoxLayout *layout = new QVBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->addWidget(d->videoWidget);
    layout->addWidget(d->controls);
    layout->addWidget(m_autoPlay, 0, Qt::AlignHCenter);
    layout->addStretch();
}

KFileAudioPreview::~KFileAudioPreview()
{
    KConfigGroup config(KSharedConfig::openConfig(), ConfigGroup);
    config.writeEntry("Autoplay", m_autoPlay->isChecked());

    delete d;
}

void KFileAudioPreview::stateChanged(Phonon::State newstate, Phonon::State oldstate)
{
    if (oldstate == Phonon::LoadingState && newstate != Phonon::ErrorState) {
        d->controls->setEnabled(true);
    }
}

void KFileAudioPreview::showPreview(const QUrl &url)
{
    d->controls->setEnabled(false);
    if (!d->player) {
        d->player = new MediaObject(this);
        Phonon::createPath(d->player, d->videoWidget);
        Phonon::createPath(d->player, d->audioOutput);
        connect(d->player, &MediaObject::stateChanged, this, &KFileAudioPreview::stateChanged);
        d->videoWidget->setVisible(d->player->hasVideo());
        connect(d->player, SIGNAL(hasVideoChanged(bool)), d->videoWidget, SLOT(setVisible(bool)));
        d->controls->setMediaObject(d->player);
    }
    d->player->setCurrentSource(url);

    if (m_autoPlay->isChecked()) {
        d->player->play();
    }
}

void KFileAudioPreview::clearPreview()
{
    if (d->player) {
        delete d->player;
        d->player = nullptr;
        d->controls->setEnabled(false);
    }
}

void KFileAudioPreview::toggleAuto(bool on)
{
    if (!d->player) {
        return;
    }

    if (on && d->controls->isEnabled()) {
        d->player->play();
    } else {
        d->player->stop();
    }
}

#include "kfileaudiopreview.moc"
#include "moc_kfileaudiopreview.cpp"