/*
 Copyright 2018 Google Inc. All Rights Reserved.
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
*/

import {cacheNames} from 'workbox-core/_private/cacheNames.mjs';
import {cacheWrapper} from 'workbox-core/_private/cacheWrapper.mjs';
import {assert} from 'workbox-core/_private/assert.mjs';
import {logger} from 'workbox-core/_private/logger.mjs';

import messages from './utils/messages.mjs';
import './_version.mjs';


/**
 * An implementation of a
 * [cache-only]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#cache-only}
 * request strategy.
 *
 * This class is useful if you want to take advantage of any [Workbox plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}.
 *
 * @memberof workbox.strategies
 */
class CacheOnly {
  /**
   * @param {Object} options
   * @param {string} options.cacheName Cache name to store and retrieve
   * requests. Defaults to cache names provided by
   * [workbox-core]{@link workbox.core.cacheNames}.
   * @param {Array<Object>} options.plugins [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
   * to use in conjunction with this caching strategy.
   * @param {Object} options.matchOptions [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)
   */
  constructor(options = {}) {
    this._cacheName = cacheNames.getRuntimeName(options.cacheName);
    this._plugins = options.plugins || [];
    this._matchOptions = options.matchOptions || null;
  }

  /**
   * This method will perform a request strategy and follows an API that
   * will work with the
   * [Workbox Router]{@link workbox.routing.Router}.
   *
   * @param {Object} options
   * @param {FetchEvent} options.event The fetch event to run this strategy
   * against.
   * @return {Promise<Response>}
   */
  async handle({event}) {
    if (process.env.NODE_ENV !== 'production') {
      assert.isInstance(event, FetchEvent, {
        moduleName: 'workbox-strategies',
        className: 'CacheOnly',
        funcName: 'handle',
        paramName: 'event',
      });
    }

    return this.makeRequest({
      event,
      request: event.request,
    });
  }

  /**
   * This method can be used to perform a make a standalone request outside the
   * context of the [Workbox Router]{@link workbox.routing.Router}.
   *
   * See "[Advanced Recipes](https://developers.google.com/web/tools/workbox/guides/advanced-recipes#make-requests)"
   * for more usage information.
   *
   * @param {Object} options
   * @param {Request|string} options.request Either a
   *     [`Request`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Request}
   *     object, or a string URL, corresponding to the request to be made.
   * @param {FetchEvent} [options.event] If provided, `event.waitUntil()` will
   *     be called automatically to extend the service worker's lifetime.
   * @return {Promise<Response>}
   */
  async makeRequest({event, request}) {
    if (typeof request === 'string') {
      request = new Request(request);
    }

    if (process.env.NODE_ENV !== 'production') {
      assert.isInstance(request, Request, {
        moduleName: 'workbox-strategies',
        className: 'CacheOnly',
        funcName: 'makeRequest',
        paramName: 'request',
      });
    }

    const response = await cacheWrapper.match({
      cacheName: this._cacheName,
      request,
      event,
      matchOptions: this._matchOptions,
      plugins: this._plugins,
    });

    if (process.env.NODE_ENV !== 'production') {
      logger.groupCollapsed(
        messages.strategyStart('CacheOnly', request));
      if (response) {
        logger.log(`Found a cached response in the '${this._cacheName}'` +
          ` cache.`);
        messages.printFinalResponse(response);
      } else {
        logger.log(`No response found in the '${this._cacheName}' cache.`);
      }
      logger.groupEnd();
    }

    return response;
  }
}

export {CacheOnly};