[GtkTemplate (ui = "/eu/callcc/audrey/play_queue.ui")]
public class Audrey.Ui.PlayQueue : Adw.Bin {
    private weak Playbin _playbin;
    public Playbin playbin {
        get { return _playbin; }
        set {
            assert (_playbin == null); // only set once
            _playbin = value;

            _playbin.play_queue.items_changed.connect (this.on_store_items_changed);
            this.can_clear_all = _playbin.play_queue.get_n_items () > 0;
        }
    }

    public bool can_clear_all { get; private set; }

    /*[GtkCallback] private void on_clear () {
        this.playbin.clear ();
    }*/

    private void on_store_items_changed (GLib.ListModel store, uint position, uint removed, uint added) {
        this.can_clear_all = store.get_n_items () > 0;
    }

    [GtkCallback] private void on_song_list_setup (Gtk.SignalListItemFactory factory, Object object) {
        var item = object as Gtk.ListItem;
        var child = new PlayQueueSong (this.playbin);

        child.draggable = true;
        child.show_position = true;
        child.show_artist = true;
        child.show_cover = true;

        item.child = child;
    }

    [GtkCallback] private void on_song_list_bind (Gtk.SignalListItemFactory factory, Object object) {
        var item = object as Gtk.ListItem;
        var child = item.child as PlayQueueSong;

        child.bind (item.position, item.item as PlaybinSong);
    }

    [GtkCallback] private void on_song_list_unbind (Gtk.SignalListItemFactory factory, Object object) {
        var item = object as Gtk.ListItem;
        var child = item.child as PlayQueueSong;

        child.unbind ();
    }

    [GtkCallback] private void on_row_activated (uint position) {
        playbin.select_track (position);
    }

    [GtkCallback] private string visible_child_name (uint n_items) {
        return n_items > 0 ? "not-empty" : "empty";
    }

    ~PlayQueue () {
        debug ("destroying play queue widget");
    }
}