/*
 Copyright 2017 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 {assert} from 'workbox-core/_private/assert.mjs';

import {defaultMethod, validMethods} from './utils/constants.mjs';
import normalizeHandler from './utils/normalizeHandler.mjs';
import './_version.mjs';

/**
 * A `Route` consists of a pair of callback functions, "match" and "handler".
 * The "match" callback determine if a route should be used to "handle" a
 * request by returning a non-falsy value if it can. The "handler" callback
 * is called when there is a match and should return a Promise that resolves
 * to a `Response`.
 *
 * @memberof workbox.routing
 */
class Route {
  /**
   * Constructor for Route class.
   *
   * @param {workbox.routing.Route~matchCallback} match
   * A callback function that determines whether the route matches a given
   * `fetch` event by returning a non-falsy value.
   * @param {workbox.routing.Route~handlerCallback} handler A callback
   * function that returns a Promise resolving to a Response.
   * @param {string} [method='GET'] The HTTP method to match the Route
   * against.
   */
  constructor(match, handler, method) {
    if (process.env.NODE_ENV !== 'production') {
      assert.isType(match, 'function', {
        moduleName: 'workbox-routing',
        className: 'Route',
        funcName: 'constructor',
        paramName: 'match',
      });

      if (method) {
        assert.isOneOf(method, validMethods, {paramName: 'method'});
      }
    }

    // These values are referenced directly by Router so cannot be
    // altered by minifification.
    this.handler = normalizeHandler(handler);
    this.match = match;
    this.method = method || defaultMethod;
  }
}

export {Route};