/*
  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 {assert} from 'workbox-core/_private/assert.js';
import {logger} from 'workbox-core/_private/logger.js';
import {RouteHandler, RouteMatchCallbackOptions} from 'workbox-core/types.js';

import {Route} from './Route.js';

import './_version.js';

export interface NavigationRouteMatchOptions {
  allowlist?: RegExp[];
  denylist?: RegExp[];
}

/**
 * NavigationRoute makes it easy to create a
 * {@link workbox-routing.Route} that matches for browser
 * [navigation requests]{@link https://developers.google.com/web/fundamentals/primers/service-workers/high-performance-loading#first_what_are_navigation_requests}.
 *
 * It will only match incoming Requests whose
 * {@link https://fetch.spec.whatwg.org/#concept-request-mode|mode}
 * is set to `navigate`.
 *
 * You can optionally only apply this route to a subset of navigation requests
 * by using one or both of the `denylist` and `allowlist` parameters.
 *
 * @memberof workbox-routing
 * @extends workbox-routing.Route
 */
class NavigationRoute extends Route {
  private readonly _allowlist: RegExp[];
  private readonly _denylist: RegExp[];

  /**
   * If both `denylist` and `allowlist` are provided, the `denylist` will
   * take precedence and the request will not match this route.
   *
   * The regular expressions in `allowlist` and `denylist`
   * are matched against the concatenated
   * [`pathname`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/pathname}
   * and [`search`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/search}
   * portions of the requested URL.
   *
   * *Note*: These RegExps may be evaluated against every destination URL during
   * a navigation. Avoid using
   * [complex RegExps](https://github.com/GoogleChrome/workbox/issues/3077),
   * or else your users may see delays when navigating your site.
   *
   * @param {workbox-routing~handlerCallback} handler A callback
   * function that returns a Promise resulting in a Response.
   * @param {Object} options
   * @param {Array<RegExp>} [options.denylist] If any of these patterns match,
   * the route will not handle the request (even if a allowlist RegExp matches).
   * @param {Array<RegExp>} [options.allowlist=[/./]] If any of these patterns
   * match the URL's pathname and search parameter, the route will handle the
   * request (assuming the denylist doesn't match).
   */
  constructor(
    handler: RouteHandler,
    {allowlist = [/./], denylist = []}: NavigationRouteMatchOptions = {},
  ) {
    if (process.env.NODE_ENV !== 'production') {
      assert!.isArrayOfClass(allowlist, RegExp, {
        moduleName: 'workbox-routing',
        className: 'NavigationRoute',
        funcName: 'constructor',
        paramName: 'options.allowlist',
      });
      assert!.isArrayOfClass(denylist, RegExp, {
        moduleName: 'workbox-routing',
        className: 'NavigationRoute',
        funcName: 'constructor',
        paramName: 'options.denylist',
      });
    }

    super(
      (options: RouteMatchCallbackOptions) => this._match(options),
      handler,
    );

    this._allowlist = allowlist;
    this._denylist = denylist;
  }

  /**
   * Routes match handler.
   *
   * @param {Object} options
   * @param {URL} options.url
   * @param {Request} options.request
   * @return {boolean}
   *
   * @private
   */
  private _match({url, request}: RouteMatchCallbackOptions): boolean {
    if (request && request.mode !== 'navigate') {
      return false;
    }

    const pathnameAndSearch = url.pathname + url.search;

    for (const regExp of this._denylist) {
      if (regExp.test(pathnameAndSearch)) {
        if (process.env.NODE_ENV !== 'production') {
          logger.log(
            `The navigation route ${pathnameAndSearch} is not ` +
              `being used, since the URL matches this denylist pattern: ` +
              `${regExp.toString()}`,
          );
        }
        return false;
      }
    }

    if (this._allowlist.some((regExp) => regExp.test(pathnameAndSearch))) {
      if (process.env.NODE_ENV !== 'production') {
        logger.debug(
          `The navigation route ${pathnameAndSearch} ` + `is being used.`,
        );
      }
      return true;
    }

    if (process.env.NODE_ENV !== 'production') {
      logger.log(
        `The navigation route ${pathnameAndSearch} is not ` +
          `being used, since the URL being navigated to doesn't ` +
          `match the allowlist.`,
      );
    }
    return false;
  }
}

export {NavigationRoute};
