/*
  Copyright 2020 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 {registerRoute} from 'workbox-routing/registerRoute.js';
import {StaleWhileRevalidate} from 'workbox-strategies/StaleWhileRevalidate.js';
import {CacheFirst} from 'workbox-strategies/CacheFirst.js';
import {CacheableResponsePlugin} from 'workbox-cacheable-response/CacheableResponsePlugin.js';
import {ExpirationPlugin} from 'workbox-expiration/ExpirationPlugin.js';

import './_version.js';

export interface GoogleFontCacheOptions {
  cachePrefix?: string;
  maxAgeSeconds?: number;
  maxEntries?: number;
}

/**
 * An implementation of the [Google fonts]{@link https://developers.google.com/web/tools/workbox/guides/common-recipes#google_fonts} caching recipe
 *
 * @memberof workbox-recipes
 *
 * @param {Object} [options]
 * @param {string} [options.cachePrefix] Cache prefix for caching stylesheets and webfonts. Defaults to google-fonts
 * @param {number} [options.maxAgeSeconds] Maximum age, in seconds, that font entries will be cached for. Defaults to 1 year
 * @param {number} [options.maxEntries] Maximum number of fonts that will be cached. Defaults to 30
 */
function googleFontsCache(options: GoogleFontCacheOptions = {}): void {
  const sheetCacheName = `${options.cachePrefix || 'google-fonts'}-stylesheets`;
  const fontCacheName = `${options.cachePrefix || 'google-fonts'}-webfonts`;
  const maxAgeSeconds = options.maxAgeSeconds || 60 * 60 * 24 * 365;
  const maxEntries = options.maxEntries || 30;

  // Cache the Google Fonts stylesheets with a stale-while-revalidate strategy.
  registerRoute(
    ({url}) => url.origin === 'https://fonts.googleapis.com',
    new StaleWhileRevalidate({
      cacheName: sheetCacheName,
    }),
  );

  // Cache the underlying font files with a cache-first strategy for 1 year.
  registerRoute(
    ({url}) => url.origin === 'https://fonts.gstatic.com',
    new CacheFirst({
      cacheName: fontCacheName,
      plugins: [
        new CacheableResponsePlugin({
          statuses: [0, 200],
        }),
        new ExpirationPlugin({
          maxAgeSeconds,
          maxEntries,
        }),
      ],
    }),
  );
}

export {googleFontsCache};