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

describe('Frame specs', function() {
  setupTestBrowserHooks();
  setupTestPageAndContextHooks();

  describe('Frame.executionContext', function() {
    itFailsFirefox('should work', async() => {
      const {page, server} = getTestState();

      await page.goto(server.EMPTY_PAGE);
      await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      expect(page.frames().length).toBe(2);
      const [frame1, frame2] = page.frames();
      const context1 = await frame1.executionContext();
      const context2 = await frame2.executionContext();
      expect(context1).toBeTruthy();
      expect(context2).toBeTruthy();
      expect(context1 !== context2).toBeTruthy();
      expect(context1.frame()).toBe(frame1);
      expect(context2.frame()).toBe(frame2);

      await Promise.all([
        context1.evaluate(() => window.a = 1),
        context2.evaluate(() => window.a = 2)
      ]);
      const [a1, a2] = await Promise.all([
        context1.evaluate(() => window.a),
        context2.evaluate(() => window.a)
      ]);
      expect(a1).toBe(1);
      expect(a2).toBe(2);
    });
  });

  describe('Frame.evaluateHandle', function() {
    it('should work', async() => {
      const {page, server} = getTestState();

      await page.goto(server.EMPTY_PAGE);
      const mainFrame = page.mainFrame();
      const windowHandle = await mainFrame.evaluateHandle(() => window);
      expect(windowHandle).toBeTruthy();
    });
  });

  describe('Frame.evaluate', function() {
    itFailsFirefox('should throw for detached frames', async() => {
      const {page, server} = getTestState();

      const frame1 = await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      await utils.detachFrame(page, 'frame1');
      let error = null;
      await frame1.evaluate(() => 7 * 8).catch(error_ => error = error_);
      expect(error.message).toContain('Execution Context is not available in detached frame');
    });
  });

  describe('Frame Management', function() {
    itFailsFirefox('should handle nested frames', async() => {
      const {page, server} = getTestState();

      await page.goto(server.PREFIX + '/frames/nested-frames.html');
      expect(utils.dumpFrames(page.mainFrame())).toEqual([
        'http://localhost:<PORT>/frames/nested-frames.html',
        '    http://localhost:<PORT>/frames/two-frames.html (2frames)',
        '        http://localhost:<PORT>/frames/frame.html (uno)',
        '        http://localhost:<PORT>/frames/frame.html (dos)',
        '    http://localhost:<PORT>/frames/frame.html (aframe)'
      ]);
    });
    itFailsFirefox('should send events when frames are manipulated dynamically', async() => {
      const {page, server} = getTestState();

      await page.goto(server.EMPTY_PAGE);
      // validate frameattached events
      const attachedFrames = [];
      page.on('frameattached', frame => attachedFrames.push(frame));
      await utils.attachFrame(page, 'frame1', './assets/frame.html');
      expect(attachedFrames.length).toBe(1);
      expect(attachedFrames[0].url()).toContain('/assets/frame.html');

      // validate framenavigated events
      const navigatedFrames = [];
      page.on('framenavigated', frame => navigatedFrames.push(frame));
      await utils.navigateFrame(page, 'frame1', './empty.html');
      expect(navigatedFrames.length).toBe(1);
      expect(navigatedFrames[0].url()).toBe(server.EMPTY_PAGE);

      // validate framedetached events
      const detachedFrames = [];
      page.on('framedetached', frame => detachedFrames.push(frame));
      await utils.detachFrame(page, 'frame1');
      expect(detachedFrames.length).toBe(1);
      expect(detachedFrames[0].isDetached()).toBe(true);
    });
    itFailsFirefox('should send "framenavigated" when navigating on anchor URLs', async() => {
      const {page, server} = getTestState();

      await page.goto(server.EMPTY_PAGE);
      await Promise.all([
        page.goto(server.EMPTY_PAGE + '#foo'),
        utils.waitEvent(page, 'framenavigated')
      ]);
      expect(page.url()).toBe(server.EMPTY_PAGE + '#foo');
    });
    it('should persist mainFrame on cross-process navigation', async() => {
      const {page, server} = getTestState();

      await page.goto(server.EMPTY_PAGE);
      const mainFrame = page.mainFrame();
      await page.goto(server.CROSS_PROCESS_PREFIX + '/empty.html');
      expect(page.mainFrame() === mainFrame).toBeTruthy();
    });
    it('should not send attach/detach events for main frame', async() => {
      const {page, server} = getTestState();

      let hasEvents = false;
      page.on('frameattached', frame => hasEvents = true);
      page.on('framedetached', frame => hasEvents = true);
      await page.goto(server.EMPTY_PAGE);
      expect(hasEvents).toBe(false);
    });
    itFailsFirefox('should detach child frames on navigation', async() => {
      const {page, server} = getTestState();

      let attachedFrames = [];
      let detachedFrames = [];
      let navigatedFrames = [];
      page.on('frameattached', frame => attachedFrames.push(frame));
      page.on('framedetached', frame => detachedFrames.push(frame));
      page.on('framenavigated', frame => navigatedFrames.push(frame));
      await page.goto(server.PREFIX + '/frames/nested-frames.html');
      expect(attachedFrames.length).toBe(4);
      expect(detachedFrames.length).toBe(0);
      expect(navigatedFrames.length).toBe(5);

      attachedFrames = [];
      detachedFrames = [];
      navigatedFrames = [];
      await page.goto(server.EMPTY_PAGE);
      expect(attachedFrames.length).toBe(0);
      expect(detachedFrames.length).toBe(4);
      expect(navigatedFrames.length).toBe(1);
    });
    itFailsFirefox('should support framesets', async() => {
      const {page, server} = getTestState();

      let attachedFrames = [];
      let detachedFrames = [];
      let navigatedFrames = [];
      page.on('frameattached', frame => attachedFrames.push(frame));
      page.on('framedetached', frame => detachedFrames.push(frame));
      page.on('framenavigated', frame => navigatedFrames.push(frame));
      await page.goto(server.PREFIX + '/frames/frameset.html');
      expect(attachedFrames.length).toBe(4);
      expect(detachedFrames.length).toBe(0);
      expect(navigatedFrames.length).toBe(5);

      attachedFrames = [];
      detachedFrames = [];
      navigatedFrames = [];
      await page.goto(server.EMPTY_PAGE);
      expect(attachedFrames.length).toBe(0);
      expect(detachedFrames.length).toBe(4);
      expect(navigatedFrames.length).toBe(1);
    });
    itFailsFirefox('should report frame from-inside shadow DOM', async() => {
      const {page, server} = getTestState();

      await page.goto(server.PREFIX + '/shadow.html');
      await page.evaluate(async url => {
        const frame = document.createElement('iframe');
        frame.src = url;
        document.body.shadowRoot.appendChild(frame);
        await new Promise(x => frame.onload = x);
      }, server.EMPTY_PAGE);
      expect(page.frames().length).toBe(2);
      expect(page.frames()[1].url()).toBe(server.EMPTY_PAGE);
    });
    itFailsFirefox('should report frame.name()', async() => {
      const {page, server} = getTestState();

      await utils.attachFrame(page, 'theFrameId', server.EMPTY_PAGE);
      await page.evaluate(url => {
        const frame = document.createElement('iframe');
        frame.name = 'theFrameName';
        frame.src = url;
        document.body.appendChild(frame);
        return new Promise(x => frame.onload = x);
      }, server.EMPTY_PAGE);
      expect(page.frames()[0].name()).toBe('');
      expect(page.frames()[1].name()).toBe('theFrameId');
      expect(page.frames()[2].name()).toBe('theFrameName');
    });
    itFailsFirefox('should report frame.parent()', async() => {
      const {page, server} = getTestState();

      await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      await utils.attachFrame(page, 'frame2', server.EMPTY_PAGE);
      expect(page.frames()[0].parentFrame()).toBe(null);
      expect(page.frames()[1].parentFrame()).toBe(page.mainFrame());
      expect(page.frames()[2].parentFrame()).toBe(page.mainFrame());
    });
    itFailsFirefox('should report different frame instance when frame re-attaches', async() => {
      const {page, server} = getTestState();

      const frame1 = await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      await page.evaluate(() => {
        window.frame = document.querySelector('#frame1');
        window.frame.remove();
      });
      expect(frame1.isDetached()).toBe(true);
      const [frame2] = await Promise.all([
        utils.waitEvent(page, 'frameattached'),
        page.evaluate(() => document.body.appendChild(window.frame)),
      ]);
      expect(frame2.isDetached()).toBe(false);
      expect(frame1).not.toBe(frame2);
    });
  });
});