/**
 * 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.
 */

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('Mouse', function() {
    it('should click the document', async({page, server}) => {
      await page.evaluate(() => {
        window.clickPromise = new Promise(resolve => {
          document.addEventListener('click', event => {
            resolve({
              type: event.type,
              detail: event.detail,
              clientX: event.clientX,
              clientY: event.clientY,
              isTrusted: event.isTrusted,
              button: event.button
            });
          });
        });
      });
      await page.mouse.click(50, 60);
      const event = await page.evaluate(() => window.clickPromise);
      expect(event.type).toBe('click');
      expect(event.detail).toBe(1);
      expect(event.clientX).toBe(50);
      expect(event.clientY).toBe(60);
      expect(event.isTrusted).toBe(true);
      expect(event.button).toBe(0);
    });
    it('should resize the textarea', async({page, server}) => {
      await page.goto(server.PREFIX + '/input/textarea.html');
      const {x, y, width, height} = await page.evaluate(dimensions);
      const mouse = page.mouse;
      await mouse.move(x + width - 4, y + height - 4);
      await mouse.down();
      await mouse.move(x + width + 100, y + height + 100);
      await mouse.up();
      const newDimensions = await page.evaluate(dimensions);
      expect(newDimensions.width).toBe(Math.round(width + 104));
      expect(newDimensions.height).toBe(Math.round(height + 104));
    });
    it('should select the text with mouse', async({page, server}) => {
      await page.goto(server.PREFIX + '/input/textarea.html');
      await page.focus('textarea');
      const text = 'This is the text that we are going to try to select. Let\'s see how it goes.';
      await page.keyboard.type(text);
      // Firefox needs an extra frame here after typing or it will fail to set the scrollTop
      await page.evaluate(() => new Promise(requestAnimationFrame));
      await page.evaluate(() => document.querySelector('textarea').scrollTop = 0);
      const {x, y} = await page.evaluate(dimensions);
      await page.mouse.move(x + 2,y + 2);
      await page.mouse.down();
      await page.mouse.move(200,100);
      await page.mouse.up();
      expect(await page.evaluate(() => {
        const textarea = document.querySelector('textarea');
        return textarea.value.substring(textarea.selectionStart, textarea.selectionEnd);
      })).toBe(text);
    });
    it('should tween mouse movement', async({page, server}) => {
      await page.mouse.move(100, 100);
      await page.evaluate(() => {
        window.result = [];
        document.addEventListener('mousemove', event => {
          window.result.push([event.clientX, event.clientY]);
        });
      });
      await page.mouse.move(200, 300, {steps: 5});
      expect(await page.evaluate('result')).toEqual([
        [120, 140],
        [140, 180],
        [160, 220],
        [180, 260],
        [200, 300]
      ]);
    });
  });
};

function dimensions() {
  const rect = document.querySelector('textarea').getBoundingClientRect();
  return {
    x: rect.left,
    y: rect.top,
    width: rect.width,
    height: rect.height
  };
}