/**
 * 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.
 */
import os from 'os';
import expect from 'expect';
import {
  getTestState,
  setupTestBrowserHooks,
  setupTestPageAndContextHooks,
  itFailsFirefox,
} from './mocha-utils';
import { KeyInput } from '../src/common/USKeyboardLayout';

interface Dimensions {
  x: number;
  y: number;
  width: number;
  height: number;
}

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

describe('Mouse', function () {
  setupTestBrowserHooks();
  setupTestPageAndContextHooks();
  it('should click the document', async () => {
    const { page } = getTestState();

    await page.evaluate(() => {
      globalThis.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<MouseEvent>(
      () => globalThis.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);
  });
  itFailsFirefox('should resize the textarea', async () => {
    const { page, server } = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    const { x, y, width, height } = await page.evaluate<Dimensions>(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>(dimensions);
    expect(newDimensions.width).toBe(Math.round(width + 104));
    expect(newDimensions.height).toBe(Math.round(height + 104));
  });
  itFailsFirefox('should select the text with mouse', async () => {
    const { page, server } = getTestState();

    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(100, 100);
    await page.mouse.up();
    expect(
      await page.evaluate(() => {
        const textarea = document.querySelector('textarea');
        return textarea.value.substring(
          textarea.selectionStart,
          textarea.selectionEnd
        );
      })
    ).toBe(text);
  });
  itFailsFirefox('should trigger hover state', async () => {
    const { page, server } = getTestState();

    await page.goto(server.PREFIX + '/input/scrollable.html');
    await page.hover('#button-6');
    expect(
      await page.evaluate(() => document.querySelector('button:hover').id)
    ).toBe('button-6');
    await page.hover('#button-2');
    expect(
      await page.evaluate(() => document.querySelector('button:hover').id)
    ).toBe('button-2');
    await page.hover('#button-91');
    expect(
      await page.evaluate(() => document.querySelector('button:hover').id)
    ).toBe('button-91');
  });
  itFailsFirefox(
    'should trigger hover state with removed window.Node',
    async () => {
      const { page, server } = getTestState();

      await page.goto(server.PREFIX + '/input/scrollable.html');
      await page.evaluate(() => delete window.Node);
      await page.hover('#button-6');
      expect(
        await page.evaluate(() => document.querySelector('button:hover').id)
      ).toBe('button-6');
    }
  );
  it('should set modifier keys on click', async () => {
    const { page, server, isFirefox } = getTestState();

    await page.goto(server.PREFIX + '/input/scrollable.html');
    await page.evaluate(() =>
      document
        .querySelector('#button-3')
        .addEventListener('mousedown', (e) => (globalThis.lastEvent = e), true)
    );
    const modifiers = new Map<KeyInput, string>([
      ['Shift', 'shiftKey'],
      ['Control', 'ctrlKey'],
      ['Alt', 'altKey'],
      ['Meta', 'metaKey'],
    ]);
    // In Firefox, the Meta modifier only exists on Mac
    if (isFirefox && os.platform() !== 'darwin') delete modifiers['Meta'];
    for (const [modifier, key] of modifiers) {
      await page.keyboard.down(modifier);
      await page.click('#button-3');
      if (!(await page.evaluate((mod) => globalThis.lastEvent[mod], key)))
        throw new Error(key + ' should be true');
      await page.keyboard.up(modifier);
    }
    await page.click('#button-3');
    for (const [modifier, key] of modifiers) {
      if (await page.evaluate((mod) => globalThis.lastEvent[mod], key))
        throw new Error(modifiers[modifier] + ' should be false');
    }
  });
  itFailsFirefox('should send mouse wheel events', async () => {
    const { page, server } = getTestState();

    await page.goto(server.PREFIX + '/input/wheel.html');
    const elem = await page.$('div');
    const boundingBoxBefore = await elem.boundingBox();
    expect(boundingBoxBefore).toMatchObject({
      width: 115,
      height: 115,
    });

    await page.mouse.move(
      boundingBoxBefore.x + boundingBoxBefore.width / 2,
      boundingBoxBefore.y + boundingBoxBefore.height / 2
    );

    await page.mouse.wheel({ deltaY: -100 });
    const boundingBoxAfter = await elem.boundingBox();
    expect(boundingBoxAfter).toMatchObject({
      width: 230,
      height: 230,
    });
  });
  itFailsFirefox('should tween mouse movement', async () => {
    const { page } = getTestState();

    await page.mouse.move(100, 100);
    await page.evaluate(() => {
      globalThis.result = [];
      document.addEventListener('mousemove', (event) => {
        globalThis.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],
    ]);
  });
  // @see https://crbug.com/929806
  itFailsFirefox(
    'should work with mobile viewports and cross process navigations',
    async () => {
      const { page, server } = getTestState();

      await page.goto(server.EMPTY_PAGE);
      await page.setViewport({ width: 360, height: 640, isMobile: true });
      await page.goto(server.CROSS_PROCESS_PREFIX + '/mobile.html');
      await page.evaluate(() => {
        document.addEventListener('click', (event) => {
          globalThis.result = { x: event.clientX, y: event.clientY };
        });
      });

      await page.mouse.click(30, 40);

      expect(await page.evaluate('result')).toEqual({ x: 30, y: 40 });
    }
  );
});