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#include "qwmpplaylist.h"

#include "qwmpevents.h"

#include "qwmpmetadata.h"

#include "qwmpglobal.h"

#include <QtCore/qstringlist.h>

#include <QtCore/qurl.h>

#include <QtCore/qvariant.h>

QWmpPlaylist::QWmpPlaylist(IWMPCore3 *player, QWmpEvents *events, QObject *parent)

    : QMediaPlaylistProvider(parent)

    , m_player(player)

    , m_playlist(0)

    , m_count(0)

{

    if (m_player && m_player->get_currentPlaylist(&m_playlist) == S_OK)

        m_playlist->get_count(&m_count);

    connect(events, SIGNAL(CurrentPlaylistChange(WMPPlaylistChangeEventType)),

            this, SLOT(currentPlaylistChangeEvent(WMPPlaylistChangeEventType)));

    connect(events, SIGNAL(OpenPlaylistSwitch(IDispatch*)),

            this, SLOT(openPlaylistChangeEvent(IDispatch*)));

    connect(events, SIGNAL(MediaChange(IDispatch*)), this, SLOT(mediaChangeEvent(IDispatch*)));

}

QWmpPlaylist::~QWmpPlaylist()

{

    if (m_playlist)

        m_playlist->Release();

}

bool QWmpPlaylist::load(const QString &location, const char *format)

{

    Q_UNUSED(location);

    Q_UNUSED(format);

    return false;

}

bool QWmpPlaylist::load(QIODevice * device, const char *format)

{

    Q_UNUSED(device);

    Q_UNUSED(format);

    return false;

}

bool QWmpPlaylist::save(const QString &location, const char *format)

{

    Q_UNUSED(location);

    Q_UNUSED(format);

    return false;

}

bool QWmpPlaylist::save(QIODevice * device, const char *format)

{

    Q_UNUSED(device);

    Q_UNUSED(format);

    return false;

}

int QWmpPlaylist::mediaCount() const

{

    return m_count;

}

QMediaContent QWmpPlaylist::media(int pos) const

{

    QMediaContent content;

    IWMPMedia *media = 0;

    if (m_playlist && m_playlist->get_item(pos, &media) == S_OK) {

        content = QWmpMetaData::resources(media);

        media->Release();

    }

    return content;

}

bool QWmpPlaylist::isReadOnly() const

{

    return false;

}

bool QWmpPlaylist::addMedia(const QMediaContent &content)

{

    bool appended = false;

    IWMPMedia *media = 0;

    if (!content.isNull() && m_playlist && m_player && m_player->newMedia(

            QAutoBStr(content.canonicalUrl()), &media) == S_OK) {

        appended = m_playlist->appendItem(media) == S_OK;

        media->Release();

    }

    return appended;

}

bool QWmpPlaylist::insertMedia(int pos, const QMediaContent &content)

{

    bool inserted = false;

    IWMPMedia *media = 0;

    if (m_playlist && m_player && m_player->newMedia(

            QAutoBStr(content.canonicalUrl()), &media) == S_OK) {

        inserted = m_playlist->insertItem(pos, media) == S_OK;

        media->Release();

    }

    return inserted;

}

bool QWmpPlaylist::removeMedia(int pos)

{

    IWMPMedia *media = 0;

    if (m_playlist->get_item(pos, &media) == S_OK) {

        bool removed = m_playlist->removeItem(media) == S_OK;

        media->Release();

        return removed;

    } else {

        return false;

    }

}

bool QWmpPlaylist::removeMedia(int start, int end)

{

    if (!m_playlist)

        return false;

    for (int i = start; i <= end; ++i) {

        IWMPMedia *media = 0;

        if (m_playlist->get_item(start, &media) == S_OK) {

            bool removed = m_playlist->removeItem(media) == S_OK;

            media->Release();

            if (!removed)

                return false;

        }

    }

    return true;

}

bool QWmpPlaylist::clear()

{

    return m_playlist && m_playlist->clear() == S_OK;

}

QStringList QWmpPlaylist::keys(int index) const

{

    QStringList keys;

    IWMPMedia *media = 0;

    if (m_playlist && m_playlist->get_item(index, &media) == S_OK) {

        keys = QWmpMetaData::keys(media);

        media->Release();

    }

    return keys;

}

QVariant QWmpPlaylist::value(int index, const QString &key) const

{

    QVariant v;

    IWMPMedia *media = 0;

    if (m_playlist && m_playlist->get_item(index, &media) == S_OK) {

        v = QWmpMetaData::value(media, QAutoBStr(key));

        media->Release();

    }

    return v;

}

void QWmpPlaylist::shuffle()

{

}

void QWmpPlaylist::currentPlaylistChangeEvent(WMPPlaylistChangeEventType change)

{

    Q_UNUSED(change);

    long count = 0;

    if (m_playlist && m_playlist->get_count(&count) == S_OK && count > 0) {

        if (count > m_count) {

            emit mediaAboutToBeInserted(m_count, count - 1);

            m_count = count;

            emit mediaInserted(count, m_count - 1);

        } else if (count < m_count) {

            emit mediaAboutToBeRemoved(count, m_count - 1);

            m_count = count;

            emit mediaRemoved(count, m_count - 1);

        }

    }

    if (m_count > 0)

        emit mediaChanged(0, m_count - 1);

}

void QWmpPlaylist::openPlaylistChangeEvent(IDispatch *dispatch)

{

    if (m_playlist && m_count > 0) {

        emit mediaAboutToBeRemoved(0, m_count - 1);

        m_playlist->Release();

        m_playlist = 0;

        m_count = 0;

        emit mediaRemoved(0, m_count - 1);

    } else if (m_playlist) {

        m_playlist->Release();

        m_playlist = 0;

    }

    IWMPPlaylist *playlist = 0;

    if (dispatch && dispatch->QueryInterface(

            __uuidof(IWMPPlaylist), reinterpret_cast<void **>(&playlist))) {

        long count = 0;

        if (playlist->get_count(&count) == S_OK && count > 0) {

            emit mediaAboutToBeInserted(0, count - 1);

            m_playlist = playlist;

            m_count = count;

            emit mediaInserted(0, count - 1);

        } else {

            m_playlist = playlist;

        }

    }

}

void QWmpPlaylist::mediaChangeEvent(IDispatch *dispatch)

{

    IWMPMedia *media = 0;

    if (dispatch &&  dispatch->QueryInterface(

            __uuidof(IWMPMedia), reinterpret_cast<void **>(&media)) == S_OK) {

        VARIANT_BOOL isMember = VARIANT_FALSE;

        if (media->isMemberOf(m_playlist, &isMember) == S_OK && isMember) {

            int index = QWmpMetaData::value(media, QAutoBStr(L"PlaylistIndex")).toInt();

            if (index >= 0)

                emit mediaChanged(index, index);

        }

        media->Release();

    }

}