/*
 * Copyright (C)  2022 Kristóf Marussy <kristof@marussy.com>
 *
 * This file is part of Sophie.
 *
 * Sophie 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, version 3.
 *
 * 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/>.
 *
 * SPDX-License-Identifier: AGPL-3.0-only
 */

export type SplitResult =
  | {
      type: 'valid';
      secure: boolean;
      prefix: string;
      host: string;
      suffix: string;
    }
  | {
      type: 'invalid';
      value: string;
    }
  | {
      type: 'empty';
    };

export default function splitUrl(urlString: string | undefined): SplitResult {
  if (urlString === undefined || urlString === '') {
    return { type: 'empty' };
  }
  let url: URL;
  try {
    url = new URL(urlString);
  } catch {
    return { type: 'invalid', value: urlString };
  }
  const { protocol, host, username, password, pathname, search, hash } = url;
  if (protocol === 'http:' || protocol === 'https:') {
    return {
      type: 'valid',
      secure: protocol === 'https:',
      prefix: `${protocol}//${
        username === ''
          ? ''
          : `${username}${password === '' ? '' : `:${password}`}@`
      }`,
      host,
      suffix: `${pathname}${search}${hash}`,
    };
  }
  return { type: 'invalid', value: urlString };
}