/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {NgswCommChannel} from '@angular/service-worker/src/low_level';
import {SwPush} from '@angular/service-worker/src/push';
import {SwUpdate} from '@angular/service-worker/src/update';
import {MockServiceWorkerContainer, MockServiceWorkerRegistration} from '@angular/service-worker/testing/mock';
import {CacheDatabase} from '@angular/service-worker/worker/src/db-cache';
import {Driver} from '@angular/service-worker/worker/src/driver';
import {Manifest} from '@angular/service-worker/worker/src/manifest';
import {MockRequest} from '@angular/service-worker/worker/testing/fetch';
import {MockFileSystemBuilder, MockServerStateBuilder, tmpHashTableForFs} from '@angular/service-worker/worker/testing/mock';
import {SwTestHarness, SwTestHarnessBuilder} from '@angular/service-worker/worker/testing/scope';
import {Observable} from 'rxjs';
import {take} from 'rxjs/operators';

import {async_beforeEach, async_fit, async_it} from './async';

(function() {
  // Skip environments that don't support the minimum APIs needed to run the SW tests.
  if (!SwTestHarness.envIsSupported()) {
    return;
  }

  const dist = new MockFileSystemBuilder().addFile('/only.txt', 'this is only').build();

  const distUpdate = new MockFileSystemBuilder().addFile('/only.txt', 'this is only v2').build();

  function obsToSinglePromise<T>(obs: Observable<T>): Promise<T> {
    return obs.pipe(take(1)).toPromise();
  }

  const manifest: Manifest = {
    configVersion: 1,
    timestamp: 1234567890123,
    appData: {version: '1'},
    index: '/only.txt',
    assetGroups: [{
      name: 'assets',
      installMode: 'prefetch',
      updateMode: 'prefetch',
      urls: ['/only.txt'],
      patterns: [],
    }],
    navigationUrls: [],
    hashTable: tmpHashTableForFs(dist),
  };

  const manifestUpdate: Manifest = {
    configVersion: 1,
    timestamp: 1234567890123,
    appData: {version: '2'},
    index: '/only.txt',
    assetGroups: [{
      name: 'assets',
      installMode: 'prefetch',
      updateMode: 'prefetch',
      urls: ['/only.txt'],
      patterns: [],
    }],
    navigationUrls: [],
    hashTable: tmpHashTableForFs(distUpdate),
  };

  const server = new MockServerStateBuilder().withStaticFiles(dist).withManifest(manifest).build();

  const serverUpdate =
      new MockServerStateBuilder().withStaticFiles(distUpdate).withManifest(manifestUpdate).build();


  describe('ngsw + companion lib', () => {
    let mock: MockServiceWorkerContainer;
    let comm: NgswCommChannel;
    let reg: MockServiceWorkerRegistration;
    let scope: SwTestHarness;
    let driver: Driver;

    async_beforeEach(async() => {
      // Fire up the client.
      mock = new MockServiceWorkerContainer();
      comm = new NgswCommChannel(mock as any);
      scope = new SwTestHarnessBuilder().withServerState(server).build();
      driver = new Driver(scope, scope, new CacheDatabase(scope, scope));

      scope.clients.add('default');
      scope.clients.getMock('default') !.queue.subscribe(msg => { mock.sendMessage(msg); });

      mock.messages.subscribe(msg => { scope.handleMessage(msg, 'default'); });
      mock.notificationClicks.subscribe(msg => { scope.handleMessage(msg, 'default'); });

      mock.setupSw();
      reg = mock.mockRegistration !;

      await Promise.all(scope.handleFetch(new MockRequest('/only.txt'), 'default'));
      await driver.initialized;
    });

    async_it('communicates back and forth via update check', async() => {
      const update = new SwUpdate(comm);
      await update.checkForUpdate();
    });

    async_it('detects an actual update', async() => {
      const update = new SwUpdate(comm);
      scope.updateServerState(serverUpdate);

      const gotUpdateNotice =
          (async() => { const notice = await obsToSinglePromise(update.available); })();

      await update.checkForUpdate();
      await gotUpdateNotice;
    });

    async_it('receives push message notifications', async() => {
      const push = new SwPush(comm);
      scope.updateServerState(serverUpdate);

      const gotPushNotice = (async() => {
        const message = await obsToSinglePromise(push.messages);
        expect(message).toEqual({
          test: 'success',
        });
      })();

      await scope.handlePush({
        test: 'success',
      });
      await gotPushNotice;
    });

    async_it('receives push message click events', async() => {
      const push = new SwPush(comm);
      scope.updateServerState(serverUpdate);

      const gotNotificationClick = (async() => {
        const event: any = await obsToSinglePromise(push.notificationClicks);
        expect(event.action).toEqual('clicked');
        expect(event.notification.title).toEqual('This is a test');
      })();

      await scope.handleClick({title: 'This is a test'}, 'clicked');
      await gotNotificationClick;
    });
  });
})();