/* extension.js
 *
 * This program 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 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */
import GObject from 'gi://GObject';
import GLib from 'gi://GLib';
import Gio from 'gi://Gio';

import * as Main from 'resource:///org/gnome/shell/ui/main.js';

import {Extension, gettext as _} from 'resource:///org/gnome/shell/extensions/extension.js';
import {QuickSlider, SystemIndicator} from 'resource:///org/gnome/shell/ui/quickSettings.js';

const ScreenpadSlider = GObject.registerClass(
    class ScreenpadSlider extends QuickSlider {
        constructor() {
            super({ iconName: 'keyboard-brightness-symbolic' });

            this._sliderChangedId = this.slider.connect('notify::value', this._sliderChanged.bind(this));
            this.slider.accessible_name = _('Screenpad');
            this.slider.value = 0.5;
        }

        _sliderChanged() {
            const byte = Math.round(this.slider.value * 255);
            const brightness_file = Gio.File.new_for_path("/sys/class/leds/asus::screenpad/brightness");
            brightness_file.replace_contents(new TextEncoder().encode(byte.toString()), null, false, Gio.FileCreateFlags.NONE, null);
        }
    }
)

export default class ScreenpadExtension extends Extension {
    enable() {
        this._slider = new SystemIndicator();
        this._slider.quickSettingsItems.push(new ScreenpadSlider());

        Main.panel.statusArea.quickSettings.addExternalIndicator(this._slider, 2);
    }

    disable() {
        for (const item of this._slider.quickSettingsItems) {
            item.destroy();
        }
        this._slider.destroy();
        this._slider = null;
    }
}