/*
 * Strawberry Music Player
 * This file was part of Clementine.
 * Copyright 2010, 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 PLAYINGWIDGET_H
#define PLAYINGWIDGET_H

#include "config.h"

#include <memory>

#include <QWidget>

#include "core/song.h"
#include "covermanager/albumcoverloaderoptions.h"

class AlbumCoverChoiceController;
class Application;

class QAction;
class QActionGroup;
class QMenu;
class QMovie;
class QSignalMapper;
class QTextDocument;
class QTimeLine;

class PlayingWidget : public QWidget {
  Q_OBJECT

 public:
  PlayingWidget(QWidget *parent = nullptr);
  ~PlayingWidget();

  static const char *kSettingsGroup;
  static const int kPadding;
  static const int kGradientHead;
  static const int kGradientTail;
  static const int kMaxCoverSize;
  static const int kBottomOffset;
  static const int kTopBorder;

  // Values are saved in QSettings
  enum Mode {
    SmallSongDetails = 0,
    LargeSongDetails = 1,
  };

  void SetApplication(Application *app);
  void SetEnabled();
  void SetDisabled();

  void set_ideal_height(int height);

  QSize sizeHint() const;

signals:
  void ShowAboveStatusBarChanged(bool above);

public slots:
  void Stopped();

protected:
  void paintEvent(QPaintEvent *e);
  void resizeEvent(QResizeEvent*);
  void contextMenuEvent(QContextMenuEvent *e);
  void mouseReleaseEvent(QMouseEvent*);
  void dragEnterEvent(QDragEnterEvent *e);
  void dropEvent(QDropEvent *e);

private slots:
  void SetMode(int mode);
  void FitCoverWidth(bool fit);

  void AlbumArtLoaded(const Song &metadata, const QString &uri, const QImage &image);

  void SetVisible(bool visible);
  void SetHeight(int height);

  void FadePreviousTrack(qreal value);

  void LoadCoverFromFile();
  void SaveCoverToFile();
  void LoadCoverFromURL();
  void SearchForCover();
  void UnsetCover();
  void ShowCover();
  void SearchCoverAutomatically();
  void AutomaticCoverSearchDone();

 private:
  void CreateModeAction(Mode mode, const QString &text, QActionGroup *group, QSignalMapper *mapper);
  void UpdateDetailsText();
  void UpdateHeight();
  void DrawContents(QPainter *p);
  void SetImage(const QImage &image);
  void ScaleCover();
  bool GetCoverAutomatically();

private:
  Application *app_;
  AlbumCoverChoiceController *album_cover_choice_controller_;

  Mode mode_;

  QMenu *menu_;

  QAction *fit_cover_width_action_;

  bool enabled_;
  bool visible_;
  bool active_;

  int small_ideal_height_;
  AlbumCoverLoaderOptions cover_loader_options_;
  int total_height_;
  bool fit_width_;
  QTimeLine *show_hide_animation_;
  QTimeLine *fade_animation_;

  // Information about the current track
  Song metadata_;
  QPixmap cover_;
  // A copy of the original, unscaled album cover.
  QImage original_;
  QTextDocument *details_;

  // Holds the last track while we're fading to the new track
  QPixmap previous_track_;
  qreal previous_track_opacity_;

  std::unique_ptr<QMovie> spinner_animation_;
  bool downloading_covers_;
};

#endif  // PLAYINGWIDGET_H