/* This file is part of Strawberry.
   Copyright 2013, David Sansome <me@davidsansome.com>

   Strawberry 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 3 of the License, or
   (at your option) any later version.

   Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef TAGREADER_H
#define TAGREADER_H

#include "config.h"

#include <string>

#include <QByteArray>
#include <QString>
#include <QNetworkAccessManager>
#include <QTextCodec>

#include <taglib/xiphcomment.h>

#include "tagreadermessages.pb.h"

namespace TagLib {
  class FileRef;
  class String;

  namespace ID3v2 {
    class Tag;
    class PopularimeterFrame;
  }
}

class FileRefFactory;

/**
 * This class holds all useful methods to read and write tags from/to files.
 * You should not use it directly in the main process but rather use a TagReaderWorker process (using TagReaderClient)
 */
class TagReader {
 public:
  TagReader();

  void ReadFile(const QString &filename, pb::tagreader::SongMetadata *song) const;
  bool SaveFile(const QString &filename, const pb::tagreader::SongMetadata &song) const;

  bool IsMediaFile(const QString &filename) const;
  QByteArray LoadEmbeddedArt(const QString &filename) const;

  static void Decode(const TagLib::String& tag, const QTextCodec *codec, std::string *output);
  static void Decode(const QString &tag, const QTextCodec *codec, std::string *output);

  void ParseFMPSFrame(const QString &name, const QString &value, pb::tagreader::SongMetadata *song) const;
  void ParseOggTag(const TagLib::Ogg::FieldListMap &map, const QTextCodec *codec, QString *disc, QString *compilation, pb::tagreader::SongMetadata *song) const;
  void SetVorbisComments(TagLib::Ogg::XiphComment *vorbis_comments, const pb::tagreader::SongMetadata &song) const;

  pb::tagreader::SongMetadata_Type GuessFileType(TagLib::FileRef *fileref) const;

  void SetUserTextFrame(const QString &description, const QString &value, TagLib::ID3v2::Tag *tag) const;
  void SetUserTextFrame(const std::string &description, const std::string& value, TagLib::ID3v2::Tag *tag) const;

  void SetTextFrame(const char *id, const QString &value, TagLib::ID3v2::Tag *tag) const;
  void SetTextFrame(const char *id, const std::string &value, TagLib::ID3v2::Tag *tag) const;

private:

  FileRefFactory *factory_;
  QNetworkAccessManager *network_;

  const std::string kEmbeddedCover;
};

#endif  // TAGREADER_H