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#include "playlistmodel.h"

#include <QtCore/qfileinfo.h>

#include <QtCore/qurl.h>

#include <qmediaplaylist.h>

PlaylistModel::PlaylistModel(QObject *parent)

    : QAbstractItemModel(parent)

    , m_playlist(0)

{

}

int PlaylistModel::rowCount(const QModelIndex &parent) const

{

    return m_playlist && !parent.isValid() ? m_playlist->mediaCount() : 0;

}

int PlaylistModel::columnCount(const QModelIndex &parent) const

{

    return !parent.isValid() ? ColumnCount : 0;

}

QModelIndex PlaylistModel::index(int row, int column, const QModelIndex &parent) const

{

    return m_playlist && !parent.isValid()

            && row >= 0 && row < m_playlist->mediaCount()

            && column >= 0 && column < ColumnCount

        ? createIndex(row, column)

        : QModelIndex();

}

QModelIndex PlaylistModel::parent(const QModelIndex &child) const

{

    Q_UNUSED(child);

    return QModelIndex();

}

QVariant PlaylistModel::data(const QModelIndex &index, int role) const

{

    if (index.isValid() && role == Qt::DisplayRole) {

        QVariant value = m_data[index];

        if (!value.isValid() && index.column() == Title) {

            QUrl location = m_playlist->media(index.row()).canonicalUrl();

            return QFileInfo(location.path()).fileName();

        }

        return value;

    }

    return QVariant();

}

QMediaPlaylist *PlaylistModel::playlist() const

{

    return m_playlist;

}

void PlaylistModel::setPlaylist(QMediaPlaylist *playlist)

{

    if (m_playlist) {

        disconnect(m_playlist, SIGNAL(mediaAboutToBeInserted(int,int)), this, SLOT(beginInsertItems(int,int)));

        disconnect(m_playlist, SIGNAL(mediaInserted(int,int)), this, SLOT(endInsertItems()));

        disconnect(m_playlist, SIGNAL(mediaAboutToBeRemoved(int,int)), this, SLOT(beginRemoveItems(int,int)));

        disconnect(m_playlist, SIGNAL(mediaRemoved(int,int)), this, SLOT(endRemoveItems()));

        disconnect(m_playlist, SIGNAL(mediaChanged(int,int)), this, SLOT(changeItems(int,int)));

    }

    m_playlist = playlist;

    if (m_playlist) {

        connect(m_playlist, SIGNAL(mediaAboutToBeInserted(int,int)), this, SLOT(beginInsertItems(int,int)));

        connect(m_playlist, SIGNAL(mediaInserted(int,int)), this, SLOT(endInsertItems()));

        connect(m_playlist, SIGNAL(mediaAboutToBeRemoved(int,int)), this, SLOT(beginRemoveItems(int,int)));

        connect(m_playlist, SIGNAL(mediaRemoved(int,int)), this, SLOT(endRemoveItems()));

        connect(m_playlist, SIGNAL(mediaChanged(int,int)), this, SLOT(changeItems(int,int)));

    }

    reset();

}

bool PlaylistModel::setData(const QModelIndex &index, const QVariant &value, int role)

{

    Q_UNUSED(role);

    m_data[index] = value;

    emit dataChanged(index, index);

    return true;

}

void PlaylistModel::beginInsertItems(int start, int end)

{

    m_data.clear();

    beginInsertRows(QModelIndex(), start, end);

}

void PlaylistModel::endInsertItems()

{

    endInsertRows();

}

void PlaylistModel::beginRemoveItems(int start, int end)

{

    m_data.clear();

    beginRemoveRows(QModelIndex(), start, end);

}

void PlaylistModel::endRemoveItems()

{

    endInsertRows();

}

void PlaylistModel::changeItems(int start, int end)

{

    m_data.clear();

    emit dataChanged(index(start,0), index(end,ColumnCount));

}