/* window.vala
 *
 * Copyright 2024 Erica Z
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

[GtkTemplate (ui = "/eu/callcc/Wavelet/window.ui")]
public class Wavelet.Window : Adw.ApplicationWindow {
    [GtkChild] private unowned Gtk.ListBox sidebar;
    [GtkChild] private unowned Gtk.ListBoxRow sidebar_setup;
    [GtkChild] private unowned Gtk.ListBoxRow sidebar_play_queue;
    [GtkChild] private unowned Gtk.Stack stack;

    [GtkChild] public unowned Wavelet.Setup setup;
    [GtkChild] public unowned Wavelet.PlayQueue play_queue;
    [GtkChild] public unowned Adw.ButtonRow shuffle_all_tracks;

    [GtkChild] public unowned Gtk.Button mute;
    [GtkChild] public unowned Gtk.Scale play_position;

    public int play_position_ms { get; set; default = 0; }
    public int play_duration_ms { get; set; default = 1; }

    public double volume { get; set; default = 1.0; }

    public Song? song { get; set; default = null; }

    private Cancellable cancel_loading_art;
    public bool cover_art_loading { get; set; default = false; }
    public Gdk.Paintable playing_cover_art { get; set; }

    public Window (Gtk.Application app) {
        Object (application: app);
    }

    construct {
        this.sidebar.select_row (this.sidebar.get_row_at_index (0));

        this.notify["song"].connect (() => {
            if (this.cancel_loading_art != null) {
                this.cancel_loading_art.cancel ();
            }
            this.cancel_loading_art = new Cancellable ();

            this.playing_cover_art = Gdk.Paintable.empty (100, 100);
            if (this.song != null) {
                this.cover_art_loading = true;

                string song_id = this.song.id;
                public_api.cover_art.begin (song_id, 100, this.cancel_loading_art, (obj, res) => {
                    try {
                        this.playing_cover_art = Gdk.Texture.for_pixbuf (public_api.cover_art.end (res));
                        this.cover_art_loading = false;
                    } catch (Error e) {
                        if (!(e is IOError.CANCELLED)) {
                            warning ("could not load cover for %s: %s", song_id, e.message);
                            this.cover_art_loading = false;
                        }
                    }
                });
            }
        });
        this.set("song", null);
    }

    public void show_mute () {
        this.mute.icon_name = "audio-volume-muted";
    }

    public void show_unmute () {
        this.mute.icon_name = "audio-volume-high";
    }

    [GtkCallback] private void on_sidebar_row_activated (Gtk.ListBoxRow row) {
        if (row == this.sidebar_setup) {
            this.stack.set_visible_child_name("setup");
        } else if (row == this.sidebar_play_queue) {
            this.stack.set_visible_child_name("play_queue");
        }
    }

    [GtkCallback] private string format_timestamp (int ms) {
        int s = ms / 1000;
        return "%02d:%02d".printf (s/60, s%60);
    }
}