/*
 * Copyright (C) 2021  Aravinth Manivannan <realaravinth@batsense.net>
 *
 * 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 <https://www.gnu.org/licenses/>.
 */

import ROUTES from '../../../api/v1/routes';

import genJsonPayload from '../../../utils/genJsonPayload';
import createError from '../../../components/error/index';

const emailExists = async (element?: HTMLInputElement) => {
  let email;
  if (element === undefined || element === null) {
    email = <HTMLInputElement>document.getElementById('email');
  } else {
    email = element;
  }
  const val = email.value;

  const payload = {
    val,
  };

  const res = await fetch(ROUTES.emailExists, genJsonPayload(payload));
  if (res.ok) {
    const data = await res.json();
    if (data.exists) {
      email.className += ' form__in-field--warn';
      createError(`Email "${val}" is already used`);
      return data.exists;
    }
    return data.exists;
  } else {
    const err = await res.json();
    createError(err.error);
  }
};

export default emailExists;