/*
  Copyright 2018 Google LLC

  Use of this source code is governed by an MIT-style
  license that can be found in the LICENSE file or at
  https://opensource.org/licenses/MIT.
*/

import {logger} from 'workbox-core/_private/logger.js';
import '../_version.js';


/**
 * @param {string} groupTitle
 * @param {Array<string>} urls
 *
 * @private
 */
function _nestedGroup(groupTitle: string, urls: string[]) {
  if (urls.length === 0) {
    return;
  }

  logger.groupCollapsed(groupTitle);

  for (const url of urls) {
    logger.log(url);
  }

  logger.groupEnd();
}

/**
 * @param {Array<string>} urlsToPrecache
 * @param {Array<string>} urlsAlreadyPrecached
 *
 * @private
 * @memberof module:workbox-precaching
 */
export function printInstallDetails(urlsToPrecache: string[], urlsAlreadyPrecached: string[]) {
  const precachedCount = urlsToPrecache.length;
  const alreadyPrecachedCount = urlsAlreadyPrecached.length;

  if (precachedCount || alreadyPrecachedCount) {
    let message =
        `Precaching ${precachedCount} file${precachedCount === 1 ? '' : 's'}.`;

    if (alreadyPrecachedCount > 0) {
      message += ` ${alreadyPrecachedCount} ` +
        `file${alreadyPrecachedCount === 1 ? ' is' : 's are'} already cached.`;
    }

    logger.groupCollapsed(message);

    _nestedGroup(`View newly precached URLs.`, urlsToPrecache);
    _nestedGroup(`View previously precached URLs.`, urlsAlreadyPrecached);
    logger.groupEnd();
  }
}