const { Gio, St } = imports.gi;
const Main = imports.ui.main;
const ExtensionUtils = imports.misc.extensionUtils;
const Me = ExtensionUtils.getCurrentExtension();
const Settings = ExtensionUtils.getSettings();

let appLaunchers = [];

class AppLauncher {
    constructor(appExecutable, appIcon, iconSize) {
        this.appExecutable = appExecutable;
        this.appIcon = appIcon;

        this.button = new St.Bin({
            style_class: 'panel-button',
            reactive: true,
            can_focus: true,
            track_hover: true
        });

        let icon = new St.Icon({
            gicon: Gio.icon_new_for_string(appIcon),
            icon_size: iconSize
        });

        this.button.set_child(icon);
        this.button.set_width(iconSize * 2);

        this.button.connect('button-press-event', () => {
            let appInfo = Gio.AppInfo.create_from_commandline(appExecutable, null, Gio.AppInfoCreateFlags.NONE);
            if (appInfo) {
                appInfo.launch([], null);
            }
        });
    }
}

function updateTopBar() {
    // remove all existing launchers
    appLaunchers.forEach(launcher => {
        Main.panel._leftBox.remove_child(launcher.button);
    });
    appLaunchers = [];

    // Add launchers based on current settings
    for (let i = 0; i < 10; i++) {
        let appExecutable = Settings.get_string(`app-executable-${i}`);
        let appIcon = Settings.get_string(`app-icon-${i}`);
        let iconSize = Settings.get_int(`icon-size-${i}`);

        //  create a launcher If executable and icon are set,
        if (appExecutable && appIcon) {
            let appLauncher = new AppLauncher(appExecutable, appIcon, iconSize);

            // Insert the launcher at the end of the left box
            Main.panel._leftBox.add_child(appLauncher.button);
            appLaunchers.push(appLauncher);
        }
    }
}

function enable() {
    updateTopBar();
    Settings.connect('changed', updateTopBar);
}

function disable() {
    appLaunchers.forEach(launcher => {
        Main.panel._leftBox.remove_child(launcher.button);
    });
    appLaunchers = [];
    Settings.disconnect('changed', updateTopBar);
}