/**
 * 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 utils = require('./utils');
const {waitEvent} = utils;
const expect = require('expect');
const {getTestState, setupTestBrowserHooks,setupTestPageAndContextHooks} = require('./mocha-utils');

describe('Target', function() {
  setupTestBrowserHooks();
  setupTestPageAndContextHooks();

  it('Browser.targets should return all of the targets', async() => {
    const { browser } = getTestState();

    // The pages will be the testing page and the original newtab page
    const targets = browser.targets();
    expect(targets.some(target => target.type() === 'page' &&
        target.url() === 'about:blank')).toBeTruthy();
    expect(targets.some(target => target.type() === 'browser')).toBeTruthy();
  });
  it('Browser.pages should return all of the pages', async() => {
    const { page, context } = getTestState();

    // The pages will be the testing page
    const allPages = await context.pages();
    expect(allPages.length).toBe(1);
    expect(allPages).toContain(page);
    expect(allPages[0]).not.toBe(allPages[1]);
  });
  it('should contain browser target', async() => {
    const { browser } = getTestState();

    const targets = browser.targets();
    const browserTarget = targets.find(target => target.type() === 'browser');
    expect(browserTarget).toBeTruthy();
  });
  it('should be able to use the default page in the browser', async() => {
    const { page, browser } = getTestState();

    // The pages will be the testing page and the original newtab page
    const allPages = await browser.pages();
    const originalPage = allPages.find(p => p !== page);
    expect(await originalPage.evaluate(() => ['Hello', 'world'].join(' '))).toBe('Hello world');
    expect(await originalPage.$('body')).toBeTruthy();
  });
  itFailsFirefox('should report when a new page is created and closed', async() => {
    const { page, server, context } = getTestState();

    const [otherPage] = await Promise.all([
      context.waitForTarget(target => target.url() === server.CROSS_PROCESS_PREFIX + '/empty.html').then(target => target.page()),
      page.evaluate(url => window.open(url), server.CROSS_PROCESS_PREFIX + '/empty.html'),
    ]);
    expect(otherPage.url()).toContain(server.CROSS_PROCESS_PREFIX);
    expect(await otherPage.evaluate(() => ['Hello', 'world'].join(' '))).toBe('Hello world');
    expect(await otherPage.$('body')).toBeTruthy();

    let allPages = await context.pages();
    expect(allPages).toContain(page);
    expect(allPages).toContain(otherPage);

    const closePagePromise = new Promise(fulfill => context.once('targetdestroyed', target => fulfill(target.page())));
    await otherPage.close();
    expect(await closePagePromise).toBe(otherPage);

    allPages = await Promise.all(context.targets().map(target => target.page()));
    expect(allPages).toContain(page);
    expect(allPages).not.toContain(otherPage);
  });
  itFailsFirefox('should report when a service worker is created and destroyed', async() => {
    const { page, server, context } = getTestState();

    await page.goto(server.EMPTY_PAGE);
    const createdTarget = new Promise(fulfill => context.once('targetcreated', target => fulfill(target)));

    await page.goto(server.PREFIX + '/serviceworkers/empty/sw.html');

    expect((await createdTarget).type()).toBe('service_worker');
    expect((await createdTarget).url()).toBe(server.PREFIX + '/serviceworkers/empty/sw.js');

    const destroyedTarget = new Promise(fulfill => context.once('targetdestroyed', target => fulfill(target)));
    await page.evaluate(() => window.registrationPromise.then(registration => registration.unregister()));
    expect(await destroyedTarget).toBe(await createdTarget);
  });
  itFailsFirefox('should create a worker from a service worker', async() => {
    const { page, server, context } = getTestState();

    await page.goto(server.PREFIX + '/serviceworkers/empty/sw.html');

    const target = await context.waitForTarget(target => target.type() === 'service_worker');
    const worker = await target.worker();
    expect(await worker.evaluate(() => self.toString())).toBe('[object ServiceWorkerGlobalScope]');
  });
  itFailsFirefox('should create a worker from a shared worker', async() => {
    const { page, server, context } = getTestState();

    await page.goto(server.EMPTY_PAGE);
    await page.evaluate(() => {
      new SharedWorker('data:text/javascript,console.log("hi")');
    });
    const target = await context.waitForTarget(target => target.type() === 'shared_worker');
    const worker = await target.worker();
    expect(await worker.evaluate(() => self.toString())).toBe('[object SharedWorkerGlobalScope]');
  });
  itFailsFirefox('should report when a target url changes', async() => {
    const { page, server, context } = getTestState();

    await page.goto(server.EMPTY_PAGE);
    let changedTarget = new Promise(fulfill => context.once('targetchanged', target => fulfill(target)));
    await page.goto(server.CROSS_PROCESS_PREFIX + '/');
    expect((await changedTarget).url()).toBe(server.CROSS_PROCESS_PREFIX + '/');

    changedTarget = new Promise(fulfill => context.once('targetchanged', target => fulfill(target)));
    await page.goto(server.EMPTY_PAGE);
    expect((await changedTarget).url()).toBe(server.EMPTY_PAGE);
  });
  itFailsFirefox('should not report uninitialized pages', async() => {
    const { context } = getTestState();

    let targetChanged = false;
    const listener = () => targetChanged = true;
    context.on('targetchanged', listener);
    const targetPromise = new Promise(fulfill => context.once('targetcreated', target => fulfill(target)));
    const newPagePromise = context.newPage();
    const target = await targetPromise;
    expect(target.url()).toBe('about:blank');

    const newPage = await newPagePromise;
    const targetPromise2 = new Promise(fulfill => context.once('targetcreated', target => fulfill(target)));
    const evaluatePromise = newPage.evaluate(() => window.open('about:blank'));
    const target2 = await targetPromise2;
    expect(target2.url()).toBe('about:blank');
    await evaluatePromise;
    await newPage.close();
    expect(targetChanged).toBe(false, 'target should not be reported as changed');
    context.removeListener('targetchanged', listener);
  });
  itFailsFirefox('should not crash while redirecting if original request was missed', async() => {
    const { page, server, context } = getTestState();

    let serverResponse = null;
    server.setRoute('/one-style.css', (req, res) => serverResponse = res);
    // Open a new page. Use window.open to connect to the page later.
    await Promise.all([
      page.evaluate(url => window.open(url), server.PREFIX + '/one-style.html'),
      server.waitForRequest('/one-style.css')
    ]);
    // Connect to the opened page.
    const target = await context.waitForTarget(target => target.url().includes('one-style.html'));
    const newPage = await target.page();
    // Issue a redirect.
    serverResponse.writeHead(302, { location: '/injectedstyle.css' });
    serverResponse.end();
    // Wait for the new page to load.
    await waitEvent(newPage, 'load');
    // Cleanup.
    await newPage.close();
  });
  itFailsFirefox('should have an opener', async() => {
    const { page, server, context } = getTestState();

    await page.goto(server.EMPTY_PAGE);
    const [createdTarget] = await Promise.all([
      new Promise(fulfill => context.once('targetcreated', target => fulfill(target))),
      page.goto(server.PREFIX + '/popup/window-open.html')
    ]);
    expect((await createdTarget.page()).url()).toBe(server.PREFIX + '/popup/popup.html');
    expect(createdTarget.opener()).toBe(page.target());
    expect(page.target().opener()).toBe(null);
  });

  describe('Browser.waitForTarget', () => {
    itFailsFirefox('should wait for a target', async() => {
      const { browser, server } = getTestState();

      let resolved = false;
      const targetPromise = browser.waitForTarget(target => target.url() === server.EMPTY_PAGE);
      targetPromise.then(() => resolved = true);
      const page = await browser.newPage();
      expect(resolved).toBe(false);
      await page.goto(server.EMPTY_PAGE);
      const target = await targetPromise;
      expect(await target.page()).toBe(page);
      await page.close();
    });
    it('should timeout waiting for a non-existent target', async() => {
      const { browser, server, puppeteer } = getTestState();

      let error = null;
      await browser.waitForTarget(target => target.url() === server.EMPTY_PAGE, {
        timeout: 1
      }).catch(e => error = e);
      expect(error).toBeInstanceOf(puppeteer.errors.TimeoutError);
    });
  });
});