/*
 * @copyright 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
 *
 * @author 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * 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/>.
 */

import logger from '../logger'

let mailvelope

const loadMailvelopeStatically = () => window.mailvelope

const loadMailvelopeDynamically = () =>
	new Promise((resolve) => {
		window.addEventListener('mailvelope', () => resolve(window.mailvelope), false)
	})

export const getMailvelope = async() => {
	if (mailvelope) {
		return mailvelope
	}

	mailvelope = loadMailvelopeStatically()
	if (mailvelope) {
		logger.debug('mailvelope found statically')
		return mailvelope
	}

	logger.debug('loading mailvelope dynamically')
	mailvelope = await loadMailvelopeDynamically()
	logger.debug('mailvelope found dynamically')
	return mailvelope
}