import GLib from 'gi://GLib';
import Gio from 'gi://Gio';
import Shell from 'gi://Shell';
var executables = null;
export var gnomeExecutables = null;
var sourceId = null;
/** Load executables accessible from path and
 * desktop app names from Shell.AppSystem API
 *
 * @returns void
 */
export function loadExecutables() {
    let path = GLib.getenv('PATH');
    if (!path)
        return;
    let paths = path?.split(':');
    if (executables === null)
        executables = new Set();
    if (gnomeExecutables === null)
        gnomeExecutables = new Map();
    paths.forEach(el => {
        let dir = Gio.File.new_for_path(el);
        dir.enumerate_children_async('standard::*', Gio.FileQueryInfoFlags.NONE, GLib.PRIORITY_LOW, null, (source, result) => {
            try {
                if (!source)
                    return;
                let e = source.enumerate_children_finish(result);
                let file;
                while ((file = e.next_file(null)) !== null) {
                    let name = file.get_name();
                    if (!executables?.has(name))
                        executables?.add(name);
                }
                e.close(null);
            } catch (e) {

            }
        });
    });
    if (sourceId !== null)
        GLib.Source.remove(sourceId);
    sourceId = GLib.idle_add(GLib.PRIORITY_LOW, () => {
        Shell.AppSystem.get_default().get_installed().forEach(app => {
            let name = app.get_display_name() ?? app.get_name();
            let exe = app.get_commandline() ?? null;
            if (!gnomeExecutables?.has(name) && exe)
                gnomeExecutables?.set(name.toLowerCase(), app);
        });
        sourceId = null;
        return GLib.SOURCE_REMOVE;
    });
}
/** Returns a list of apps beginning with `word`
 *
 * @param {string} word
 * @returns
 */
export function autocomplete(word) {
    word = word.toLowerCase();
    let matches = [];
    gnomeExecutables?.forEach((e, w) => w.startsWith(word) && w !== word && e !== null ? matches.push(w) : -1);
    executables?.forEach(w => w.startsWith(word) && w !== word ? matches.push(w) : -1);
    matches.sort((a, b) => a.length < b.length ? -1 : 1);
    return matches;
}
export function clear() {
    if (sourceId !== null)
        GLib.Source.remove(sourceId);
    sourceId = null;
}
export function destroy() {
    executables = null;
    gnomeExecutables = null;
}