/*
 * Strawberry Music Player
 * This code was part of Clementine (GlobalSearch)
 * Copyright 2012, David Sansome <me@davidsansome.com>
 * Copyright 2018, 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 INTERNETSEARCHVIEW_H
#define INTERNETSEARCHVIEW_H

#include "config.h"

#include <QWidget>
#include <QMap>
#include <QList>
#include <QString>
#include <QPixmap>

#include "collection/collectionmodel.h"
#include "settings/settingsdialog.h"
#include "playlist/playlistmanager.h"
#include "internetsearch.h"

class QSortFilterProxyModel;
class QMimeData;
class QTimer;
class QMenu;
class QAction;
class QActionGroup;
class QEvent;
class QKeyEvent;
class QShowEvent;
class QHideEvent;
class QContextMenuEvent;

class Application;
class GroupByDialog;
class InternetSearchModel;
class Ui_InternetSearchView;

class InternetSearchView : public QWidget {
  Q_OBJECT

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

  void Init(Application *app, InternetSearch *engine, QString settings_group, SettingsDialog::Page settings_page);

  static const int kSwapModelsTimeoutMsec;

  void LazyLoadArt(const QModelIndex &index);

  void showEvent(QShowEvent *e);
  void hideEvent(QHideEvent *e);
  bool eventFilter(QObject *object, QEvent *event);

 public slots:
  void ReloadSettings();
  void StartSearch(const QString &query);
  void FocusSearchField();
  void OpenSettingsDialog();

signals:
  void AddToPlaylist(QMimeData *data);

 private slots:
  void SwapModels();
  void TextEdited(const QString &text);
  void UpdateStatus(QString text);
  void ProgressSetMaximum(int progress);
  void UpdateProgress(int max);
  void AddResults(int id, const InternetSearch::ResultList &results);
  void SearchError(const int id, const QString error);
  void ArtLoaded(int id, const QPixmap &pixmap);

  void FocusOnFilter(QKeyEvent *event);

  void AddSelectedToPlaylist();
  void LoadSelected();
  void OpenSelectedInNewPlaylist();
  void AddSelectedToPlaylistEnqueue();

  void SearchForThis();

  void SearchArtistsClicked(bool);
  void SearchAlbumsClicked(bool);
  void SearchSongsClicked(bool);
  void GroupByClicked(QAction *action);
  void SetSearchType(InternetSearch::SearchType type);
  void SetGroupBy(const CollectionModel::Grouping &g);

 private:
  MimeData *SelectedMimeData();

  bool SearchKeyEvent(QKeyEvent *event);
  bool ResultsContextMenuEvent(QContextMenuEvent *event);

  Application *app_;
  InternetSearch *engine_;
  QString settings_group_;
  SettingsDialog::Page settings_page_;
  Ui_InternetSearchView *ui_;
  QScopedPointer<GroupByDialog> group_by_dialog_;

  QMenu *context_menu_;
  QList<QAction*> context_actions_;
  QActionGroup *group_by_actions_;

  int last_search_id_;

  // Like graphics APIs have a front buffer and a back buffer, there's a front model and a back model
  // The front model is the one that's shown in the UI and the back model is the one that lies in wait.
  // current_model_ will point to either the front or the back model.
  InternetSearchModel *front_model_;
  InternetSearchModel *back_model_;
  InternetSearchModel *current_model_;

  QSortFilterProxyModel *front_proxy_;
  QSortFilterProxyModel *back_proxy_;
  QSortFilterProxyModel *current_proxy_;

  QMap<int, QModelIndex> art_requests_;

  QTimer *swap_models_timer_;

  InternetSearch::SearchType search_type_;
  bool error_;

};

#endif  // INTERNETSEARCHVIEW_H