/*
 * Strawberry Music Player
 * This file was part of Clementine.
 * Copyright 2010, David Sansome <me@davidsansome.com>
 * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
 *
 * 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 ORGANISE_H
#define ORGANISE_H

#include "config.h"

#include <memory>
#include <optional>

#include <QObject>
#include <QBasicTimer>
#include <QFileInfo>
#include <QSet>
#include <QList>
#include <QVector>
#include <QMap>
#include <QString>
#include <QStringList>

#include "core/song.h"
#include "organizeformat.h"

class QThread;
class QTimer;
class QTimerEvent;

class MusicStorage;
class TaskManager;
#ifdef HAVE_GSTREAMER
class Transcoder;
#endif

class Organize : public QObject {
  Q_OBJECT

 public:
  struct NewSongInfo {
    explicit NewSongInfo() : unique_filename_(false) {}
    explicit NewSongInfo(const Song &song, const QString &new_filename, const bool unique_filename) : song_(song), new_filename_(new_filename), unique_filename_(unique_filename) {}
    Song song_;
    QString new_filename_;
    bool unique_filename_;
  };
  using NewSongInfoList = QList<NewSongInfo>;

  explicit Organize(TaskManager *task_manager, std::shared_ptr<MusicStorage> destination, const OrganizeFormat &format, const bool copy, const bool overwrite, const bool albumcover, const NewSongInfoList &songs, const bool eject_after, const QString &playlist = QString(), QObject *parent = nullptr);
  ~Organize() override;

  static const int kBatchSize;
#ifdef HAVE_GSTREAMER
  static const int kTranscodeProgressInterval;
#endif

  void Start();

 signals:
  void Finished(QStringList files_with_errors, QStringList);
  void FileCopied(int database_id);
  void SongPathChanged(Song song, QFileInfo new_file, std::optional<int> new_collection_directory_id);

 protected:
  void timerEvent(QTimerEvent *e) override;

 private slots:
  void ProcessSomeFiles();
  void FileTranscoded(const QString &input, const QString &output, bool success);
  void LogLine(const QString &message);

 private:
  void SetSongProgress(float progress, bool transcoded = false);
  void UpdateProgress();
#ifdef HAVE_GSTREAMER
  Song::FileType CheckTranscode(Song::FileType original_type) const;
#endif

 private:
  struct Task {
    explicit Task(const NewSongInfo &song_info = NewSongInfo())
        : song_info_(song_info),
          transcode_progress_(0.0) {}

    NewSongInfo song_info_;
    float transcode_progress_;
    QString transcoded_filename_;
    QString new_extension_;
    Song::FileType new_filetype_;
  };

  QThread *thread_;
  QThread *original_thread_;
  TaskManager *task_manager_;
#ifdef HAVE_GSTREAMER
  Transcoder *transcoder_;
#endif
  QTimer *process_files_timer_;
  std::shared_ptr<MusicStorage> destination_;
  QList<Song::FileType> supported_filetypes_;

  const OrganizeFormat format_;
  const bool copy_;
  const bool overwrite_;
  const bool albumcover_;
  const bool eject_after_;
  quint64 task_count_;
  const QString playlist_;

  QBasicTimer transcode_progress_timer_;
  QVector<Task> tasks_pending_;
  QMap<QString, Task> tasks_transcoding_;
  int tasks_complete_;

  bool started_;

  int task_id_;
  int current_copy_progress_;
  bool finished_;

  QStringList files_with_errors_;
  QStringList log_;
};

#endif  // ORGANISE_H