/* This file is part of Clementine.

   Clementine 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.

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

#include "mainwindow.h"
#include "player.h"
#include "playlist.h"
#include "library.h"
#include "libraryconfig.h"
#include "songplaylistitem.h"
#include "systemtrayicon.h"
#include "radiomodel.h"
#include "engines/enginebase.h"
#include "lastfmservice.h"
#include "osd.h"
#include "trackslider.h"
#include "edittagdialog.h"
#include "multiloadingindicator.h"
#include "settingsdialog.h"
#include "libraryconfigdialog.h"
#include "about.h"
#include "addstreamdialog.h"
#include "stylesheetloader.h"
#include "albumcovermanager.h"
#include "m3uparser.h"
#include "xspfparser.h"
#include "playlistsequence.h"
#include "groupbydialog.h"
#include "engines/gstengine.h"
#include "equalizer.h"
#include "commandlineoptions.h"

#include "globalshortcuts/globalshortcuts.h"

#include <QFileSystemModel>
#include <QSortFilterProxyModel>
#include <QUndoStack>
#include <QDir>
#include <QMenu>
#include <QMessageBox>
#include <QSettings>
#include <QtDebug>
#include <QCloseEvent>
#include <QSignalMapper>
#include <QFileDialog>
#include <QTimer>

#include <cmath>

#ifdef Q_OS_DARWIN
// Non exported mac-specific function.
void qt_mac_set_dock_menu(QMenu*);
#endif

const int MainWindow::kStateVersion = 1;
const char* MainWindow::kSettingsGroup = "MainWindow";
const char* MainWindow::kMediaFilterSpec =
    "Music (*.mp3 *.ogg *.flac *.mpc *.m4a *.aac *.wma);;Playlists (*.m3u *.xspf *.xml)";

MainWindow::MainWindow(QNetworkAccessManager* network, QWidget *parent)
  : QMainWindow(parent),
#ifdef Q_OS_DARWIN
    tray_icon_(NULL),
#else
    tray_icon_(new SystemTrayIcon(this)),
#endif
    osd_(new OSD(tray_icon_, this)),
    track_slider_(new TrackSlider(this)),
    playlist_sequence_(new PlaylistSequence(this)),
    edit_tag_dialog_(new EditTagDialog(this)),
    multi_loading_indicator_(new MultiLoadingIndicator(this)),
    library_config_dialog_(new LibraryConfigDialog(this)),
    about_dialog_(new About(this)),
    radio_model_(new RadioModel(this)),
    playlist_(new Playlist(this)),
    player_(new Player(playlist_, radio_model_->GetLastFMService(), this)),
    library_(new Library(player_->GetEngine(), this)),
    global_shortcuts_(new GlobalShortcuts(this)),
    settings_dialog_(new SettingsDialog(this)),
    add_stream_dialog_(new AddStreamDialog(this)),
    cover_manager_(new AlbumCoverManager(network, this)),
    group_by_dialog_(new GroupByDialog(this)),
    equalizer_(new Equalizer(this)),
    playlist_menu_(new QMenu(this)),
    library_sort_model_(new QSortFilterProxyModel(this)),
    track_position_timer_(new QTimer(this))
{
  ui_.setupUi(this);
#ifndef Q_OS_DARWIN
  tray_icon_->setIcon(windowIcon());
  tray_icon_->setToolTip(QCoreApplication::applicationName());
#endif

  ui_.volume->setValue(player_->GetVolume());

  track_position_timer_->setInterval(1000);
  connect(track_position_timer_, SIGNAL(timeout()), SLOT(UpdateTrackPosition()));

  // Start initialising the player
  player_->Init();

  if (GstEngine* engine = qobject_cast<GstEngine*>(player_->GetEngine()))
    settings_dialog_->SetGstEngine(engine);

  // Models
  library_sort_model_->setSourceModel(library_);
  library_sort_model_->setSortRole(Library::Role_SortText);
  library_sort_model_->setDynamicSortFilter(true);
  library_sort_model_->sort(0);

  playlist_->IgnoreSorting(true);
  ui_.playlist->setModel(playlist_);
  ui_.playlist->setItemDelegates(library_);
  playlist_->IgnoreSorting(false);

  ui_.library_view->setModel(library_sort_model_);
  ui_.library_view->SetLibrary(library_);
  library_config_dialog_->SetModel(library_->GetDirectoryModel());
  settings_dialog_->SetLibraryDirectoryModel(library_->GetDirectoryModel());

  ui_.radio_view->setModel(radio_model_);

  cover_manager_->Init();

  // File view connections
  connect(ui_.file_view, SIGNAL(Queue(QList<QUrl>)), SLOT(QueueFiles(QList<QUrl>)));
  connect(ui_.file_view, SIGNAL(PathChanged(QString)), SLOT(FilePathChanged(QString)));

  // Action connections
  connect(ui_.action_next_track, SIGNAL(triggered()), player_, SLOT(Next()));
  connect(ui_.action_previous_track, SIGNAL(triggered()), player_, SLOT(Previous()));
  connect(ui_.action_play_pause, SIGNAL(triggered()), player_, SLOT(PlayPause()));
  connect(ui_.action_stop, SIGNAL(triggered()), player_, SLOT(Stop()));
  connect(ui_.action_quit, SIGNAL(triggered()), qApp, SLOT(quit()));
  connect(ui_.action_stop_after_this_track, SIGNAL(triggered()), SLOT(StopAfterCurrent()));
  connect(ui_.library_filter, SIGNAL(textChanged(QString)), library_, SLOT(SetFilterText(QString)));
  connect(ui_.action_ban, SIGNAL(triggered()), radio_model_->GetLastFMService(), SLOT(Ban()));
  connect(ui_.action_love, SIGNAL(triggered()), SLOT(Love()));
  connect(ui_.action_clear_playlist, SIGNAL(triggered()), playlist_, SLOT(Clear()));
  connect(ui_.action_remove_from_playlist, SIGNAL(triggered()), SLOT(PlaylistRemoveCurrent()));
  connect(ui_.action_edit_track, SIGNAL(triggered()), SLOT(EditTracks()));
  connect(ui_.action_renumber_tracks, SIGNAL(triggered()), SLOT(RenumberTracks()));
  connect(ui_.action_selection_set_value, SIGNAL(triggered()), SLOT(SelectionSetValue()));
  connect(ui_.action_edit_value, SIGNAL(triggered()), SLOT(EditValue()));
  connect(ui_.action_configure, SIGNAL(triggered()), settings_dialog_, SLOT(show()));
  connect(ui_.action_about, SIGNAL(triggered()), about_dialog_, SLOT(show()));
  connect(ui_.action_shuffle, SIGNAL(triggered()), playlist_, SLOT(Shuffle()));
  connect(ui_.action_open_media, SIGNAL(triggered()), SLOT(AddMedia()));
  connect(ui_.action_add_media, SIGNAL(triggered()), SLOT(AddMedia()));
  connect(ui_.action_add_stream, SIGNAL(triggered()), SLOT(AddStream()));
  connect(ui_.action_cover_manager, SIGNAL(triggered()), cover_manager_, SLOT(show()));
  connect(ui_.action_equalizer, SIGNAL(triggered()), equalizer_, SLOT(show()));

  // Give actions to buttons
  ui_.forward_button->setDefaultAction(ui_.action_next_track);
  ui_.back_button->setDefaultAction(ui_.action_previous_track);
  ui_.pause_play_button->setDefaultAction(ui_.action_play_pause);
  ui_.stop_button->setDefaultAction(ui_.action_stop);
  ui_.love_button->setDefaultAction(ui_.action_love);
  ui_.ban_button->setDefaultAction(ui_.action_ban);
  ui_.clear_playlist_button->setDefaultAction(ui_.action_clear_playlist);

  // Add the shuffle and repeat action groups to the menu
  ui_.action_shuffle_mode->setMenu(playlist_sequence_->shuffle_menu());
  ui_.action_repeat_mode->setMenu(playlist_sequence_->repeat_menu());

  // Stop actions
  QMenu* stop_menu = new QMenu(this);
  stop_menu->addAction(ui_.action_stop);
  stop_menu->addAction(ui_.action_stop_after_this_track);
  ui_.stop_button->setMenu(stop_menu);

  // Player connections
  connect(ui_.volume, SIGNAL(valueChanged(int)), player_, SLOT(SetVolume(int)));

  connect(player_, SIGNAL(Error(QString)), SLOT(ReportError(QString)));
  connect(player_, SIGNAL(Paused()), SLOT(MediaPaused()));
  connect(player_, SIGNAL(Playing()), SLOT(MediaPlaying()));
  connect(player_, SIGNAL(Stopped()), SLOT(MediaStopped()));

  connect(player_, SIGNAL(Paused()), playlist_, SLOT(Paused()));
  connect(player_, SIGNAL(Playing()), playlist_, SLOT(Playing()));
  connect(player_, SIGNAL(Stopped()), playlist_, SLOT(Stopped()));

  connect(player_, SIGNAL(Paused()), ui_.playlist, SLOT(StopGlowing()));
  connect(player_, SIGNAL(Playing()), ui_.playlist, SLOT(StartGlowing()));
  connect(player_, SIGNAL(Stopped()), ui_.playlist, SLOT(StopGlowing()));

  connect(player_, SIGNAL(Paused()), osd_, SLOT(Paused()));
  connect(player_, SIGNAL(Stopped()), osd_, SLOT(Stopped()));
  connect(player_, SIGNAL(VolumeChanged(int)), osd_, SLOT(VolumeChanged(int)));
  connect(player_, SIGNAL(VolumeChanged(int)), ui_.volume, SLOT(setValue(int)));
  connect(player_, SIGNAL(ForceShowOSD(Song)), SLOT(ForceShowOSD(Song)));
  connect(playlist_, SIGNAL(CurrentSongChanged(Song)), osd_, SLOT(SongChanged(Song)));
  connect(playlist_, SIGNAL(CurrentSongChanged(Song)), player_, SLOT(CurrentMetadataChanged(Song)));
  connect(playlist_, SIGNAL(PlaylistChanged()), player_, SLOT(PlaylistChanged()));
  connect(playlist_, SIGNAL(EditingFinished(QModelIndex)), SLOT(PlaylistEditFinished(QModelIndex)));

  connect(ui_.playlist, SIGNAL(doubleClicked(QModelIndex)), SLOT(PlayIndex(QModelIndex)));
  connect(ui_.playlist, SIGNAL(PlayPauseItem(QModelIndex)), SLOT(PlayIndex(QModelIndex)));
  connect(ui_.playlist, SIGNAL(RightClicked(QPoint,QModelIndex)), SLOT(PlaylistRightClick(QPoint,QModelIndex)));

  connect(track_slider_, SIGNAL(ValueChanged(int)), player_, SLOT(Seek(int)));

  // Library connections
  connect(library_, SIGNAL(Error(QString)), SLOT(ReportError(QString)));
  connect(ui_.library_view, SIGNAL(doubleClicked(QModelIndex)), SLOT(AddLibraryItemToPlaylist(QModelIndex)));
  connect(ui_.library_view, SIGNAL(AddToPlaylist(QModelIndex)), SLOT(AddLibraryItemToPlaylist(QModelIndex)));
  connect(ui_.library_view, SIGNAL(ShowConfigDialog()), library_config_dialog_, SLOT(show()));
  connect(library_, SIGNAL(TotalSongCountUpdated(int)), ui_.library_view, SLOT(TotalSongCountUpdated(int)));
  connect(library_, SIGNAL(ScanStarted()), SLOT(LibraryScanStarted()));
  connect(library_, SIGNAL(ScanFinished()), SLOT(LibraryScanFinished()));
  connect(library_, SIGNAL(BackendReady(boost::shared_ptr<LibraryBackendInterface>)),
          cover_manager_, SLOT(SetBackend(boost::shared_ptr<LibraryBackendInterface>)));
  connect(library_, SIGNAL(BackendReady(boost::shared_ptr<LibraryBackendInterface>)),
          playlist_, SLOT(SetBackend(boost::shared_ptr<LibraryBackendInterface>)));

  // Age filters
  QActionGroup* filter_age_group = new QActionGroup(this);
  filter_age_group->addAction(ui_.filter_age_all);
  filter_age_group->addAction(ui_.filter_age_today);
  filter_age_group->addAction(ui_.filter_age_week);
  filter_age_group->addAction(ui_.filter_age_month);
  filter_age_group->addAction(ui_.filter_age_three_months);
  filter_age_group->addAction(ui_.filter_age_year);

  QMenu* filter_age_menu = new QMenu("Show", this);
  filter_age_menu->addActions(filter_age_group->actions());

  QSignalMapper* filter_age_mapper = new QSignalMapper(this);
  filter_age_mapper->setMapping(ui_.filter_age_all, -1);
  filter_age_mapper->setMapping(ui_.filter_age_today, 60*60*24);
  filter_age_mapper->setMapping(ui_.filter_age_week, 60*60*24*7);
  filter_age_mapper->setMapping(ui_.filter_age_month, 60*60*24*30);
  filter_age_mapper->setMapping(ui_.filter_age_three_months, 60*60*24*30*3);
  filter_age_mapper->setMapping(ui_.filter_age_year, 60*60*24*365);

  connect(ui_.filter_age_all, SIGNAL(triggered()), filter_age_mapper, SLOT(map()));
  connect(ui_.filter_age_today, SIGNAL(triggered()), filter_age_mapper, SLOT(map()));
  connect(ui_.filter_age_week, SIGNAL(triggered()), filter_age_mapper, SLOT(map()));
  connect(ui_.filter_age_month, SIGNAL(triggered()), filter_age_mapper, SLOT(map()));
  connect(ui_.filter_age_three_months, SIGNAL(triggered()), filter_age_mapper, SLOT(map()));
  connect(ui_.filter_age_year, SIGNAL(triggered()), filter_age_mapper, SLOT(map()));
  connect(filter_age_mapper, SIGNAL(mapped(int)), library_, SLOT(SetFilterAge(int)));
  connect(ui_.library_filter_clear, SIGNAL(clicked()), SLOT(ClearLibraryFilter()));

  // "Group by ..."
  ui_.group_by_artist->setProperty("group_by", QVariant::fromValue(
      Library::Grouping(Library::GroupBy_Artist)));
  ui_.group_by_artist_album->setProperty("group_by", QVariant::fromValue(
      Library::Grouping(Library::GroupBy_Artist, Library::GroupBy_Album)));
  ui_.group_by_artist_yearalbum->setProperty("group_by", QVariant::fromValue(
      Library::Grouping(Library::GroupBy_Artist, Library::GroupBy_YearAlbum)));
  ui_.group_by_album->setProperty("group_by", QVariant::fromValue(
      Library::Grouping(Library::GroupBy_Album)));
  ui_.group_by_genre_album->setProperty("group_by", QVariant::fromValue(
      Library::Grouping(Library::GroupBy_Genre, Library::GroupBy_Album)));
  ui_.group_by_genre_artist_album->setProperty("group_by", QVariant::fromValue(
      Library::Grouping(Library::GroupBy_Genre, Library::GroupBy_Artist, Library::GroupBy_Album)));

  group_by_group_ = new QActionGroup(this);
  group_by_group_->addAction(ui_.group_by_artist);
  group_by_group_->addAction(ui_.group_by_artist_album);
  group_by_group_->addAction(ui_.group_by_artist_yearalbum);
  group_by_group_->addAction(ui_.group_by_album);
  group_by_group_->addAction(ui_.group_by_genre_album);
  group_by_group_->addAction(ui_.group_by_genre_artist_album);
  group_by_group_->addAction(ui_.group_by_advanced);

  QMenu* group_by_menu = new QMenu("Group by", this);
  group_by_menu->addActions(group_by_group_->actions());

  connect(group_by_group_, SIGNAL(triggered(QAction*)), SLOT(GroupByClicked(QAction*)));
  connect(library_, SIGNAL(GroupingChanged(Library::Grouping)),
          group_by_dialog_, SLOT(LibraryGroupingChanged(Library::Grouping)));
  connect(library_, SIGNAL(GroupingChanged(Library::Grouping)),
          SLOT(LibraryGroupingChanged(Library::Grouping)));
  connect(group_by_dialog_, SIGNAL(Accepted(Library::Grouping)),
          library_, SLOT(SetGroupBy(Library::Grouping)));

  // Library config menu
  QMenu* library_menu = new QMenu(this);
  library_menu->addMenu(filter_age_menu);
  library_menu->addMenu(group_by_menu);
  library_menu->addSeparator();
  library_menu->addAction(tr("Configure library..."), library_config_dialog_, SLOT(show()));
  ui_.library_options->setMenu(library_menu);
  connect(library_config_dialog_, SIGNAL(accepted()), ui_.library_view, SLOT(ReloadSettings()));

  // Playlist menu
  playlist_play_pause_ = playlist_menu_->addAction(tr("Play"), this, SLOT(PlaylistPlay()));
  playlist_menu_->addAction(ui_.action_stop);
  playlist_stop_after_ = playlist_menu_->addAction(QIcon(":media-playback-stop.png"), tr("Stop after this track"), this, SLOT(PlaylistStopAfter()));
  playlist_menu_->addSeparator();
  playlist_menu_->addAction(ui_.action_remove_from_playlist);
  playlist_menu_->addSeparator();
  playlist_menu_->addAction(ui_.action_edit_track);
  playlist_menu_->addAction(ui_.action_edit_value);
  playlist_menu_->addAction(ui_.action_renumber_tracks);
  playlist_menu_->addAction(ui_.action_selection_set_value);
  playlist_menu_->addSeparator();
  playlist_menu_->addAction(ui_.action_clear_playlist);
  playlist_menu_->addAction(ui_.action_shuffle);

  // Radio connections
  connect(radio_model_, SIGNAL(TaskStarted(MultiLoadingIndicator::TaskType)), multi_loading_indicator_, SLOT(TaskStarted(MultiLoadingIndicator::TaskType)));
  connect(radio_model_, SIGNAL(TaskFinished(MultiLoadingIndicator::TaskType)), multi_loading_indicator_, SLOT(TaskFinished(MultiLoadingIndicator::TaskType)));
  connect(radio_model_, SIGNAL(StreamError(QString)), SLOT(ReportError(QString)));
  connect(radio_model_, SIGNAL(StreamFinished()), player_, SLOT(NextItem()));
  connect(radio_model_, SIGNAL(StreamReady(QUrl,QUrl)), player_, SLOT(StreamReady(QUrl,QUrl)));
  connect(radio_model_, SIGNAL(StreamMetadataFound(QUrl,Song)), playlist_, SLOT(SetStreamMetadata(QUrl,Song)));
  connect(radio_model_, SIGNAL(AddItemToPlaylist(RadioItem*)), SLOT(InsertRadioItem(RadioItem*)));
  connect(radio_model_->GetLastFMService(), SIGNAL(ScrobblingEnabledChanged(bool)), SLOT(ScrobblingEnabledChanged(bool)));
  connect(radio_model_->GetLastFMService(), SIGNAL(ButtonVisibilityChanged(bool)), SLOT(LastFMButtonVisibilityChanged(bool)));
  connect(ui_.radio_view, SIGNAL(doubleClicked(QModelIndex)), SLOT(RadioDoubleClick(QModelIndex)));

  LastFMButtonVisibilityChanged(radio_model_->GetLastFMService()->AreButtonsVisible());

  // Tray icon
  QMenu* tray_menu = new QMenu(this);
  tray_menu->addAction(ui_.action_previous_track);
  tray_menu->addAction(ui_.action_play_pause);
  tray_menu->addAction(ui_.action_stop);
  tray_menu->addAction(ui_.action_next_track);
  tray_menu->addSeparator();
  tray_menu->addAction(ui_.action_love);
  tray_menu->addAction(ui_.action_ban);
  tray_menu->addSeparator();
  tray_menu->addAction(ui_.action_quit);
  
  // We use the dock instead of the system tray on mac.
#ifdef Q_OS_DARWIN
  qt_mac_set_dock_menu(tray_menu);
#else
  tray_icon_->setContextMenu(tray_menu);
  connect(tray_icon_, SIGNAL(WheelEvent(int)), SLOT(VolumeWheelEvent(int)));
  connect(tray_icon_, SIGNAL(activated(QSystemTrayIcon::ActivationReason)), SLOT(TrayClicked(QSystemTrayIcon::ActivationReason)));
#endif

  // Global shortcuts
  connect(global_shortcuts_, SIGNAL(PlayPause()), ui_.action_play_pause, SLOT(trigger()));
  connect(global_shortcuts_, SIGNAL(Stop()), ui_.action_stop, SLOT(trigger()));
  connect(global_shortcuts_, SIGNAL(Next()), ui_.action_next_track, SLOT(trigger()));
  connect(global_shortcuts_, SIGNAL(Previous()), ui_.action_previous_track, SLOT(trigger()));

  // Settings
  connect(settings_dialog_, SIGNAL(accepted()), SLOT(ReloadSettings()));
  connect(settings_dialog_, SIGNAL(accepted()), player_, SLOT(ReloadSettings()));
  connect(settings_dialog_, SIGNAL(accepted()), osd_, SLOT(ReloadSettings()));
  connect(settings_dialog_, SIGNAL(accepted()), ui_.library_view, SLOT(ReloadSettings()));
  connect(settings_dialog_, SIGNAL(accepted()), player_->GetEngine(), SLOT(ReloadSettings()));

  // Add stream dialog
  connect(add_stream_dialog_, SIGNAL(accepted()), SLOT(AddStreamAccepted()));

  // Analyzer
  ui_.analyzer->set_engine(player_->GetEngine());

  // Equalizer
  connect(equalizer_, SIGNAL(ParametersChanged(int,QList<int>)),
          player_->GetEngine(), SLOT(SetEqualizerParameters(int,QList<int>)));
  connect(equalizer_, SIGNAL(EnabledChanged(bool)),
          player_->GetEngine(), SLOT(SetEqualizerEnabled(bool)));
  player_->GetEngine()->SetEqualizerEnabled(equalizer_->is_enabled());
  player_->GetEngine()->SetEqualizerParameters(
      equalizer_->preamp_value(), equalizer_->gain_values());

  // Statusbar widgets
  playlist_->set_sequence(playlist_sequence_);
  ui_.statusBar->addPermanentWidget(playlist_sequence_);
  ui_.statusBar->addPermanentWidget(track_slider_);
  ui_.statusBar->addWidget(multi_loading_indicator_);
  multi_loading_indicator_->hide();

  // Load theme
  StyleSheetLoader* css_loader = new StyleSheetLoader(this);
  css_loader->SetStyleSheet(this, ":mainwindow.css");

  // Load settings
  settings_.beginGroup(kSettingsGroup);

  restoreGeometry(settings_.value("geometry").toByteArray());
  if (!restoreState(settings_.value("state").toByteArray(), kStateVersion)) {
    tabifyDockWidget(ui_.files_dock, ui_.radio_dock);
    tabifyDockWidget(ui_.files_dock, ui_.library_dock);
  }

  ui_.file_view->SetPath(settings_.value("file_path", QDir::homePath()).toString());

  library_->SetGroupBy(Library::Grouping(
      Library::GroupBy(settings_.value("group_by1", int(Library::GroupBy_Artist)).toInt()),
      Library::GroupBy(settings_.value("group_by2", int(Library::GroupBy_Album)).toInt()),
      Library::GroupBy(settings_.value("group_by3", int(Library::GroupBy_None)).toInt())));

  StartupBehaviour behaviour =
      StartupBehaviour(settings_.value("startupbehaviour", Startup_Remember).toInt());
  bool hidden = settings_.value("hidden", false).toBool();
  bool show_tray = settings_.value("showtray", true).toBool();

  switch (behaviour) {
    case Startup_AlwaysHide: hide(); break;
    case Startup_AlwaysShow: show(); break;
    case Startup_Remember:   setVisible(!hidden); break;
  }

#ifndef Q_OS_DARWIN
  if (show_tray)
    tray_icon_->show();

  // Force the window to show in case somehow the config has tray and window set to hide
  if (hidden && !show_tray) {
    settings_.setValue("hidden", false);
    show();
  }
#else
  // Always show mainwindow on startup on OS X.
  show();
#endif

  library_->Init();
  library_->StartThreads();
}

MainWindow::~MainWindow() {
  SaveGeometry();
}

void MainWindow::ReloadSettings() {
#ifndef Q_OS_DARWIN
  bool show_tray = settings_.value("showtray", true).toBool();

  tray_icon_->setVisible(show_tray);
  if (!show_tray && !isVisible())
    show();
#endif
}

void MainWindow::QueueFiles(const QList<QUrl>& urls) {
  QModelIndex playlist_index = playlist_->InsertPaths(urls);

  if (playlist_index.isValid() && player_->GetState() != Engine::Playing)
    player_->PlayAt(playlist_index.row(), Engine::First);
}

void MainWindow::ReportError(const QString& message) {
  // TODO: rate limiting
  QMessageBox::warning(this, "Error", message);
}

void MainWindow::MediaStopped() {
  ui_.action_stop->setEnabled(false);
  ui_.action_stop_after_this_track->setEnabled(false);
  ui_.action_play_pause->setIcon(QIcon(":media-playback-start.png"));
  ui_.action_play_pause->setText(tr("Play"));

  ui_.action_play_pause->setEnabled(true);

  ui_.action_ban->setEnabled(false);
  ui_.action_love->setEnabled(false);

  track_position_timer_->stop();
  track_slider_->SetStopped();
#ifndef Q_OS_DARWIN
  tray_icon_->SetProgress(0);
#endif
}

void MainWindow::MediaPaused() {
  ui_.action_stop->setEnabled(true);
  ui_.action_stop_after_this_track->setEnabled(true);
  ui_.action_play_pause->setIcon(QIcon(":media-playback-start.png"));
  ui_.action_play_pause->setText(tr("Play"));

  ui_.action_play_pause->setEnabled(true);

  track_position_timer_->stop();
}

void MainWindow::MediaPlaying() {
  ui_.action_stop->setEnabled(true);
  ui_.action_stop_after_this_track->setEnabled(true);
  ui_.action_play_pause->setIcon(QIcon(":media-playback-pause.png"));
  ui_.action_play_pause->setText(tr("Pause"));

  ui_.action_play_pause->setEnabled(
      ! (player_->GetCurrentItemOptions() & PlaylistItem::PauseDisabled));

  bool is_lastfm = (player_->GetCurrentItemOptions() & PlaylistItem::LastFMControls);
  LastFMService* lastfm = radio_model_->GetLastFMService();

  ui_.action_ban->setEnabled(lastfm->IsScrobblingEnabled() && is_lastfm);
  ui_.action_love->setEnabled(lastfm->IsScrobblingEnabled());

  track_slider_->SetCanSeek(!is_lastfm);

  track_position_timer_->start();
  UpdateTrackPosition();
}

void MainWindow::ScrobblingEnabledChanged(bool value) {
  if (!player_->GetState() == Engine::Idle)
    return;

  bool is_lastfm = (player_->GetCurrentItemOptions() & PlaylistItem::LastFMControls);
  ui_.action_ban->setEnabled(value && is_lastfm);
  ui_.action_love->setEnabled(value);
}

void MainWindow::LastFMButtonVisibilityChanged(bool value) {
  ui_.action_ban->setVisible(value);
  ui_.action_love->setVisible(value);
  ui_.last_fm_controls->setVisible(value);
}

void MainWindow::resizeEvent(QResizeEvent*) {
  SaveGeometry();
}

void MainWindow::SaveGeometry() {
  settings_.setValue("geometry", saveGeometry());
  settings_.setValue("state", saveState(kStateVersion));
}

void MainWindow::PlayIndex(const QModelIndex& index) {
  if (!index.isValid())
    return;

  player_->PlayAt(index.row(), Engine::Manual);
}

void MainWindow::AddLibraryItemToPlaylist(const QModelIndex& index) {
  QModelIndex idx = index;
  if (idx.model() == library_sort_model_)
    idx = library_sort_model_->mapToSource(idx);

  QModelIndex first_song =
      playlist_->InsertLibraryItems(library_->GetChildSongs(idx));

  if (first_song.isValid() && player_->GetState() != Engine::Playing)
    player_->PlayAt(first_song.row(), Engine::First);
}

void MainWindow::VolumeWheelEvent(int delta) {
  ui_.volume->setValue(ui_.volume->value() + delta / 30);
}

void MainWindow::TrayClicked(QSystemTrayIcon::ActivationReason reason) {
  switch (reason) {
    case QSystemTrayIcon::DoubleClick:
    case QSystemTrayIcon::Trigger:
      if(isMinimized()) {
        hide();
        setWindowState((windowState() & ~Qt::WindowMinimized) | Qt::WindowActive);
        SetHiddenInTray(false);
      } else {
        SetHiddenInTray(isVisible());
      }
      break;

    case QSystemTrayIcon::MiddleClick:
      player_->PlayPause();
      break;

    default:
      break;
  }
}

void MainWindow::StopAfterCurrent() {
  playlist_->StopAfter(playlist_->current_index());
}

/**
  * Exit if the tray icon is not visible, otherwise ignore and set hidden in tray.
  * On OS X, never quit when the main window is closed. This is equivalent to hiding in the tray.
  */
void MainWindow::closeEvent(QCloseEvent* event) {
#ifndef Q_OS_DARWIN
  if (tray_icon_->isVisible() && event->spontaneous()) {
    event->ignore();
    SetHiddenInTray(true);
  } else {
    QApplication::quit();
  }
#endif
}

void MainWindow::SetHiddenInTray(bool hidden) {
  settings_.setValue("hidden", hidden);
  setVisible(!hidden);
}

void MainWindow::ClearLibraryFilter() {
  ui_.library_filter->clear();
  ui_.library_filter->setFocus();
}

void MainWindow::FilePathChanged(const QString& path) {
  settings_.setValue("file_path", path);
}

void MainWindow::UpdateTrackPosition() {
  // Track position in seconds
  const int position = std::floor(float(player_->GetEngine()->position()) / 1000.0 + 0.5);
  const int length = player_->GetCurrentItem().length();

  if (length <= 0) {
    // Probably a stream that we don't know the length of
    track_slider_->SetStopped();
#ifndef Q_OS_DARWIN
    tray_icon_->SetProgress(0);
#endif
    return;
  }

  // Time to scrobble?
  LastFMService* lastfm = radio_model_->GetLastFMService();

  if (!playlist_->has_scrobbled() &&
      position >= playlist_->scrobble_point()) {
    lastfm->Scrobble();
    playlist_->set_scrobbled(true);
  }

  // Update the slider
  track_slider_->SetValue(position, length);

#ifndef Q_OS_DARWIN
  // Update the tray icon every 10 seconds
  if (position % 10 == 1) {
    tray_icon_->SetProgress(double(position) / length * 100);
  }
#endif
}

void MainWindow::Love() {
  radio_model_->GetLastFMService()->Love();
  ui_.action_love->setEnabled(false);
}

void MainWindow::RadioDoubleClick(const QModelIndex& index) {
  InsertRadioItem(radio_model_->IndexToItem(index));
}

void MainWindow::InsertRadioItem(RadioItem* item) {
  QModelIndex first_song = playlist_->InsertRadioStations(
      QList<RadioItem*>() << item);

  if (first_song.isValid() && player_->GetState() != Engine::Playing)
    player_->PlayAt(first_song.row(), Engine::Manual);
}

void MainWindow::PlaylistRightClick(const QPoint& global_pos, const QModelIndex& index) {
  playlist_menu_index_ = index;

  if (playlist_->current_index() == index.row() && player_->GetState() == Engine::Playing) {
    playlist_play_pause_->setText(tr("Pause"));
    playlist_play_pause_->setIcon(QIcon(":media-playback-pause.png"));
  } else {
    playlist_play_pause_->setText(tr("Play"));
    playlist_play_pause_->setIcon(QIcon(":media-playback-start.png"));
  }

  if (index.isValid()) {
    playlist_play_pause_->setEnabled(
        playlist_->current_index() != index.row() ||
        ! (playlist_->item_at(index.row())->options() & PlaylistItem::PauseDisabled));
  } else {
    playlist_play_pause_->setEnabled(false);
  }

  playlist_stop_after_->setEnabled(index.isValid());

  // Are any of the selected songs editable?
  QModelIndexList selection = ui_.playlist->selectionModel()->selection().indexes();
  int editable = 0;
  foreach (const QModelIndex& index, selection) {
    if (index.column() != 0)
      continue;
    if (playlist_->item_at(index.row())->Metadata().IsEditable()) {
      editable++;
    }
  }
  ui_.action_edit_track->setEnabled(editable);

  bool track_column = (index.column() == Playlist::Column_Track);
  ui_.action_renumber_tracks->setVisible(editable >= 2 && track_column);
  ui_.action_selection_set_value->setVisible(editable >= 2 && !track_column);
  ui_.action_edit_value->setVisible(editable);
  ui_.action_remove_from_playlist->setEnabled(!selection.isEmpty());

  if (!index.isValid()) {
    ui_.action_selection_set_value->setVisible(false);
    ui_.action_edit_value->setVisible(false);
  } else {
    Playlist::Column column = (Playlist::Column)index.column();
    bool editable = Playlist::column_is_editable(column);

    ui_.action_selection_set_value->setVisible(
        ui_.action_selection_set_value->isVisible() && editable);
    ui_.action_edit_value->setVisible(
        ui_.action_edit_value->isVisible() && editable);

    QString column_name = Playlist::column_name(column);
    QString column_value = playlist_->data(index).toString();
    if (column_value.length() > 25)
      column_value = column_value.left(25) + "...";

    ui_.action_selection_set_value->setText(tr("Set %1 to \"%2\"...")
             .arg(column_name.toLower()).arg(column_value));
    ui_.action_edit_value->setText(tr("Edit tag \"%1\"...").arg(column_name));
  }

  playlist_menu_->popup(global_pos);
}

void MainWindow::PlaylistPlay() {
  if (playlist_->current_index() == playlist_menu_index_.row()) {
    player_->PlayPause();
  } else {
    player_->PlayAt(playlist_menu_index_.row(), Engine::Manual);
  }
}

void MainWindow::PlaylistStopAfter() {
  playlist_->StopAfter(playlist_menu_index_.row());
}

void MainWindow::EditTracks() {
  SongList songs;
  QList<int> rows;

  foreach (const QModelIndex& index,
           ui_.playlist->selectionModel()->selection().indexes()) {
    if (index.column() != 0)
      continue;
    Song song = playlist_->item_at(index.row())->Metadata();

    if (song.IsEditable()) {
      songs << song;
      rows << index.row();
    }
  }

  edit_tag_dialog_->SetSongs(songs);
  edit_tag_dialog_->SetTagCompleter(library_);

  if (edit_tag_dialog_->exec() == QDialog::Rejected)
    return;

  playlist_->ReloadItems(rows);
}

void MainWindow::RenumberTracks() {
  QModelIndexList indexes=ui_.playlist->selectionModel()->selection().indexes();
  int track=1;

  // if first selected song has a track number set, start from that offset
  if (indexes.size()) {
    Song first_song=playlist_->item_at(indexes[0].row())->Metadata();
    if (int first_track = first_song.track())
      track = first_track;
  }

  foreach (const QModelIndex& index, indexes) {
    if (index.column() != 0)
      continue;

    int row = index.row();
    Song song = playlist_->item_at(row)->Metadata();

    if (song.IsEditable()) {
      song.set_track(track);
      song.Save();
      playlist_->item_at(row)->Reload();
    }
    track++;
  }
}

void MainWindow::SelectionSetValue() {
  Playlist::Column column = (Playlist::Column)playlist_menu_index_.column();
  QVariant column_value = playlist_->data(playlist_menu_index_);

  QModelIndexList indexes=ui_.playlist->selectionModel()->selection().indexes();
  foreach (const QModelIndex& index, indexes) {
    if (index.column() != 0)
      continue;

    int row = index.row();
    Song song = playlist_->item_at(row)->Metadata();

    if(Playlist::set_column_value(song, column, column_value)) {
      song.Save();
      playlist_->item_at(row)->Reload();
    }
  }
}

void MainWindow::EditValue() {
  ui_.playlist->edit(playlist_menu_index_);
}

void MainWindow::LibraryScanStarted() {
  multi_loading_indicator_->TaskStarted(MultiLoadingIndicator::UpdatingLibrary);
}

void MainWindow::LibraryScanFinished() {
  multi_loading_indicator_->TaskFinished(MultiLoadingIndicator::UpdatingLibrary);
}

void MainWindow::AddMedia() {
  // Last used directory
  QString directory = settings_.value("add_media_path", QDir::currentPath()).toString();

  // Show dialog
  QStringList file_names = QFileDialog::getOpenFileNames(
      this, "Add media", directory, kMediaFilterSpec);
  if (file_names.isEmpty())
    return;

  // Save last used directory
  settings_.setValue("add_media_path", file_names[0]);

  // Add media
  QList<QUrl> urls;
  foreach (const QString& path, file_names) {
    if (path.endsWith(".m3u")) {
      QFile file(path);
      QFileInfo info(file);
      file.open(QIODevice::ReadOnly);
      M3UParser parser(&file, info.dir());
      const SongList& songs = parser.Parse();
      playlist_->InsertSongs(songs);
    } else if (path.endsWith(".xspf") || path.endsWith(".xml")) {
      QFile file(path);
      file.open(QIODevice::ReadOnly);
      XSPFParser parser(&file);
      const SongList& songs = parser.Parse();
      playlist_->InsertSongs(songs);
    } else {
      QUrl url(path);
      if (url.scheme().isEmpty())
        url.setScheme("file");
      urls << url;
    }
  }
  playlist_->InsertPaths(urls);
}

void MainWindow::AddStream() {
  add_stream_dialog_->show();
}

void MainWindow::AddStreamAccepted() {
  QList<QUrl> urls;
  urls << add_stream_dialog_->url();

  playlist_->InsertStreamUrls(urls);
}

void MainWindow::PlaylistRemoveCurrent() {
  ui_.playlist->RemoveSelected();
}

void MainWindow::GroupByClicked(QAction* action) {
  if (action->property("group_by").isNull()) {
    group_by_dialog_->show();
    return;
  }

  Library::Grouping g = action->property("group_by").value<Library::Grouping>();
  library_->SetGroupBy(g);
}

void MainWindow::LibraryGroupingChanged(const Library::Grouping& g) {
  // Save the settings
  settings_.setValue("group_by1", int(g[0]));
  settings_.setValue("group_by2", int(g[1]));
  settings_.setValue("group_by3", int(g[2]));

  // Now make sure the correct action is checked
  foreach (QAction* action, group_by_group_->actions()) {
    if (action->property("group_by").isNull())
      continue;

    if (g == action->property("group_by").value<Library::Grouping>()) {
      action->setChecked(true);
      return;
    }
  }
  ui_.group_by_advanced->setChecked(true);
}

void MainWindow::PlaylistEditFinished(const QModelIndex& index) {
  if (index == playlist_menu_index_)
    SelectionSetValue();
}

void MainWindow::CommandlineOptionsReceived(const QByteArray& serialized_options) {
  if (serialized_options == "wake up!") {
    // Old versions of Clementine sent this - just ignore it
    return;
  }

  CommandlineOptions options;
  options.Load(serialized_options);

  if (options.is_empty()) {
    show();
    activateWindow();
  }
  else
    CommandlineOptionsReceived(options);
}

void MainWindow::CommandlineOptionsReceived(const CommandlineOptions &options) {
  switch (options.player_action()) {
    case CommandlineOptions::Player_Play:
      player_->Play();
      break;
    case CommandlineOptions::Player_PlayPause:
      player_->PlayPause();
      break;
    case CommandlineOptions::Player_Pause:
      player_->Pause();
      break;
    case CommandlineOptions::Player_Stop:
      player_->Stop();
      break;
    case CommandlineOptions::Player_Previous:
      player_->Previous();
      break;
    case CommandlineOptions::Player_Next:
      player_->Next(Engine::Manual);
      break;

    case CommandlineOptions::Player_None:
      break;
  }

  switch (options.url_list_action()) {
    case CommandlineOptions::UrlList_Load:
      playlist_->Clear();

      // fallthrough
    case CommandlineOptions::UrlList_Append:
      playlist_->InsertPaths(options.urls(), -1);
      break;
  }

  if (options.set_volume() != -1)
    player_->SetVolume(options.set_volume());

  if (options.volume_modifier() != 0)
    player_->SetVolume(player_->GetVolume() + options.volume_modifier());

  if (options.seek_to() != -1)
    player_->Seek(options.seek_to());
  else if (options.seek_by() != 0)
    player_->Seek(player_->PositionGet() / 1000 + options.seek_by());

  if (options.play_track_at() != -1)
    player_->PlayAt(options.play_track_at(), Engine::Manual);

  if (options.show_osd())
    player_->ShowOSD();
}

void MainWindow::ForceShowOSD(const Song &song) {
  osd_->ForceShowNextNotification();
  osd_->SongChanged(song);
}