/*
 * @copyright Copyright (c) 2023 Grigorii Shartsev <me@shgk.me>
 *
 * @author Grigorii Shartsev <me@shgk.me>
 *
 * @license AGPL-3.0-or-later
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

/**
 * Check if dark theme is used
 *
 * @return {boolean}
 */
function checkIfDarkTheme() {
	// Nextcloud uses --background-invert-if-dark for dark theme filters in CSS
	// Values:
	// - 'invert(100%)' for dark theme
	// - 'no' for light theme
	return window.getComputedStyle(document.body).getPropertyValue('--background-invert-if-dark') === 'invert(100%)'
}

/**
 * Is Dark Theme enabled
 * We do not support dark/light theme update without reload the page, so the value can be computed once
 *
 * @type {boolean}
 */
export const isDarkTheme = checkIfDarkTheme()