/***************************************************************************
 *   Copyright (C) 2008-2010 by Ilya Kotov                                 *
 *   forkotov02@hotmail.ru                                                 *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include <QTextStream>
#include <QTextCodec>
#include <qmmp/metadatamanager.h>
#include "cueparser.h"

CUEParser::CUEParser(const QByteArray &array, const QString &fileName)
{
    QString album, genre, date, comment;
    QTextStream textStream (array);
    textStream.setCodec("UTF-8");
    m_filePath = fileName;
    QString artist;
    while (!textStream.atEnd())
    {
        QString line = textStream.readLine().trimmed();
        QStringList words = splitLine(line);
        if (words.size() < 2)
            continue;

        if (words[0] == "PERFORMER")
        {
            if(m_infoList.isEmpty())
                artist = words[1];
            else
                m_infoList.last().setMetaData(Qmmp::ARTIST, words[1]);
        }
        else if (words[0] == "TITLE")
        {
            if(m_infoList.isEmpty())
                album = words[1];
            else
                m_infoList.last().setMetaData(Qmmp::TITLE, words[1]);
        }
        else if (words[0] == "TRACK")
        {
            QString path = fileName;
            path.replace("%", QString(QUrl::toPercentEncoding("%"))); //replace special symbols
            path.replace("#", QString(QUrl::toPercentEncoding("#")));
            path.replace("?", QString(QUrl::toPercentEncoding("?")));
            path.replace(":", QString(QUrl::toPercentEncoding(":")));
            FileInfo info("wvpack://" + path + QString("#%1").arg(words[1].toInt()));
            info.setMetaData(Qmmp::TRACK, words[1].toInt());
            info.setMetaData(Qmmp::ALBUM, album);
            info.setMetaData(Qmmp::GENRE, genre);
            info.setMetaData(Qmmp::YEAR, date);
            info.setMetaData(Qmmp::COMMENT, comment);
            info.setMetaData(Qmmp::ARTIST, artist);
            m_infoList << info;
            m_offsets << 0;
        }
        else if (words[0] == "INDEX" && words[1] == "01")
        {
            if (m_infoList.isEmpty())
                continue;
            m_offsets.last() = getLength(words[2]);
            int c = m_infoList.count();
            if(c > 1)
                m_infoList[c - 2].setLength(m_offsets[c - 1] - m_offsets[c - 2]);
        }
        else if (words[0] == "REM")
        {
            if (words.size() < 3)
                continue;
            if (words[1] == "GENRE")
                genre = words[2];
            else if (words[1] == "DATE")
                date = words[2];
            else if (words[1] == "COMMENT")
                comment = words[2];
        }
    }
    if(m_infoList.isEmpty())
    {
        qWarning("CUEParser: invalid cue file");
        return;
    }
    //calculate last item length
    QList <FileInfo *> f_list = MetaDataManager::instance()->createPlayList(m_filePath, false);
    qint64 l = f_list.isEmpty() ? 0 : f_list.at(0)->length() * 1000;
    if (l > m_offsets.last())
        m_infoList.last().setLength(l - m_offsets.last());
    else
        m_infoList.last().setLength(0);
}

CUEParser::~CUEParser()
{
}

QList<FileInfo*> CUEParser::createPlayList()
{
    QList<FileInfo*> list;
    foreach(FileInfo info, m_infoList)
    {
        list << new FileInfo(info);
        list.last()->setLength(list.last()->length()/1000);
    }
    return list;
}

const QString CUEParser::filePath()
{
    return m_filePath;
}

qint64 CUEParser::offset(int track)
{
    return m_offsets.at(track - 1);
}

qint64 CUEParser::length(int track)
{
    return m_infoList.at(track - 1).length();
}

int CUEParser::count()
{
    return m_infoList.count();
}

FileInfo *CUEParser::info(int track)
{
    return &m_infoList[track - 1];
}

const QString CUEParser::trackURL(int track)
{
    return m_infoList[track - 1].path();
}

QStringList CUEParser::splitLine(const QString &line)
{
    //qDebug("row string = %s",qPrintable(line));
    QStringList list;
    QString buf = line.trimmed();
    if (buf.isEmpty())
        return list;
    while (!buf.isEmpty())
    {
        //qDebug(qPrintable(buf));
        if (buf.startsWith('"'))
        {
            int end = buf.indexOf('"',1);
            list << buf.mid (1, end - 1);
            buf.remove (0, end+1);
        }
        else
        {
            int end = buf.indexOf(' ', 0);
            if (end < 0)
                end = buf.size();
            list << buf.mid (0, end);
            buf.remove (0, end);
        }
        buf = buf.trimmed();
    }
    return list;
}

qint64 CUEParser::getLength(const QString &str)
{
    QStringList list = str.split(":");
    if (list.size() == 2)
        return (qint64)list.at(0).toInt()*60000 + list.at(1).toInt()*1000;
    else if (list.size() == 3)
        return (qint64)list.at(0).toInt()*60000 + list.at(1).toInt()*1000 + list.at(2).toInt()*1000/75;
    return 0;
}
