/**
 * 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.
 */
const DeviceDescriptors = require('puppeteer/DeviceDescriptors');
const iPhone = DeviceDescriptors['iPhone 6'];
const iPhoneLandscape = DeviceDescriptors['iPhone 6 landscape'];

module.exports.addTests = function({testRunner, expect, product}) {
  const {describe, xdescribe, fdescribe} = testRunner;
  const {it, fit, xit} = testRunner;
  const {beforeAll, beforeEach, afterAll, afterEach} = testRunner;

  const FFOX = product === 'firefox';
  const CHROME = product === 'chromium';

  describe('Page.viewport', function() {
    it('should get the proper viewport size', async({page, server}) => {
      expect(page.viewport()).toEqual({width: 800, height: 600});
      await page.setViewport({width: 123, height: 456});
      expect(page.viewport()).toEqual({width: 123, height: 456});
    });
    it('should support mobile emulation', async({page, server}) => {
      await page.goto(server.PREFIX + '/mobile.html');
      expect(await page.evaluate(() => window.innerWidth)).toBe(800);
      await page.setViewport(iPhone.viewport);
      expect(await page.evaluate(() => window.innerWidth)).toBe(375);
      await page.setViewport({width: 400, height: 300});
      expect(await page.evaluate(() => window.innerWidth)).toBe(400);
    });
    it('should support touch emulation', async({page, server}) => {
      await page.goto(server.PREFIX + '/mobile.html');
      expect(await page.evaluate(() => 'ontouchstart' in window)).toBe(false);
      await page.setViewport(iPhone.viewport);
      expect(await page.evaluate(() => 'ontouchstart' in window)).toBe(true);
      expect(await page.evaluate(dispatchTouch)).toBe('Received touch');
      await page.setViewport({width: 100, height: 100});
      expect(await page.evaluate(() => 'ontouchstart' in window)).toBe(false);

      function dispatchTouch() {
        let fulfill;
        const promise = new Promise(x => fulfill = x);
        window.ontouchstart = function(e) {
          fulfill('Received touch');
        };
        window.dispatchEvent(new Event('touchstart'));

        fulfill('Did not receive touch');

        return promise;
      }
    });
    it('should be detectable by Modernizr', async({page, server}) => {
      await page.goto(server.PREFIX + '/detect-touch.html');
      expect(await page.evaluate(() => document.body.textContent.trim())).toBe('NO');
      await page.setViewport(iPhone.viewport);
      await page.goto(server.PREFIX + '/detect-touch.html');
      expect(await page.evaluate(() => document.body.textContent.trim())).toBe('YES');
    });
    it('should detect touch when applying viewport with touches', async({page, server}) => {
      await page.setViewport({ width: 800, height: 600, hasTouch: true });
      await page.addScriptTag({url: server.PREFIX + '/modernizr.js'});
      expect(await page.evaluate(() => Modernizr.touchevents)).toBe(true);
    });
    xit('should support landscape emulation', async({page, server}) => {
      await page.goto(server.PREFIX + '/mobile.html');
      expect(await page.evaluate(() => screen.orientation.type)).toBe('portrait-primary');
      await page.setViewport(iPhoneLandscape.viewport);
      expect(await page.evaluate(() => screen.orientation.type)).toBe('landscape-primary');
      await page.setViewport({width: 100, height: 100});
      expect(await page.evaluate(() => screen.orientation.type)).toBe('portrait-primary');
    });
  });
};