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

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

  it('should type into a textarea', async() => {
    const {page} = getTestState();

    await page.evaluate(() => {
      const textarea = document.createElement('textarea');
      document.body.appendChild(textarea);
      textarea.focus();
    });
    const text = 'Hello world. I am the text that was typed!';
    await page.keyboard.type(text);
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe(text);
  });
  itFailsFirefox('should press the metaKey', async() => {
    const {page, isFirefox} = getTestState();

    await page.evaluate(() => {
      window.keyPromise = new Promise(resolve => document.addEventListener('keydown', event => resolve(event.key)));
    });
    await page.keyboard.press('Meta');
    expect(await page.evaluate('keyPromise')).toBe(isFirefox && os.platform() !== 'darwin' ? 'OS' : 'Meta');
  });
  it('should move with the arrow keys', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    await page.type('textarea', 'Hello World!');
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('Hello World!');
    for (let i = 0; i < 'World!'.length; i++)
      page.keyboard.press('ArrowLeft');
    await page.keyboard.type('inserted ');
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('Hello inserted World!');
    page.keyboard.down('Shift');
    for (let i = 0; i < 'inserted '.length; i++)
      page.keyboard.press('ArrowLeft');
    page.keyboard.up('Shift');
    await page.keyboard.press('Backspace');
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('Hello World!');
  });
  it('should send a character with ElementHandle.press', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    const textarea = await page.$('textarea');
    await textarea.press('a');
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('a');

    await page.evaluate(() => window.addEventListener('keydown', e => e.preventDefault(), true));

    await textarea.press('b');
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('a');
  });
  itFailsFirefox('ElementHandle.press should support |text| option', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    const textarea = await page.$('textarea');
    await textarea.press('a', {text: 'ё'});
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('ё');
  });
  itFailsFirefox('should send a character with sendCharacter', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    await page.focus('textarea');
    await page.keyboard.sendCharacter('嗨');
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('嗨');
    await page.evaluate(() => window.addEventListener('keydown', e => e.preventDefault(), true));
    await page.keyboard.sendCharacter('a');
    expect(await page.evaluate(() => document.querySelector('textarea').value)).toBe('嗨a');
  });
  itFailsFirefox('should report shiftKey', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/keyboard.html');
    const keyboard = page.keyboard;
    const codeForKey = {'Shift': 16, 'Alt': 18, 'Control': 17};
    for (const modifierKey in codeForKey) {
      await keyboard.down(modifierKey);
      expect(await page.evaluate(() => getResult())).toBe('Keydown: ' + modifierKey + ' ' + modifierKey + 'Left ' + codeForKey[modifierKey] + ' [' + modifierKey + ']');
      await keyboard.down('!');
      // Shift+! will generate a keypress
      if (modifierKey === 'Shift')
        expect(await page.evaluate(() => getResult())).toBe('Keydown: ! Digit1 49 [' + modifierKey + ']\nKeypress: ! Digit1 33 33 [' + modifierKey + ']');
      else
        expect(await page.evaluate(() => getResult())).toBe('Keydown: ! Digit1 49 [' + modifierKey + ']');

      await keyboard.up('!');
      expect(await page.evaluate(() => getResult())).toBe('Keyup: ! Digit1 49 [' + modifierKey + ']');
      await keyboard.up(modifierKey);
      expect(await page.evaluate(() => getResult())).toBe('Keyup: ' + modifierKey + ' ' + modifierKey + 'Left ' + codeForKey[modifierKey] + ' []');
    }
  });
  it('should report multiple modifiers', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/keyboard.html');
    const keyboard = page.keyboard;
    await keyboard.down('Control');
    expect(await page.evaluate(() => getResult())).toBe('Keydown: Control ControlLeft 17 [Control]');
    await keyboard.down('Alt');
    expect(await page.evaluate(() => getResult())).toBe('Keydown: Alt AltLeft 18 [Alt Control]');
    await keyboard.down(';');
    expect(await page.evaluate(() => getResult())).toBe('Keydown: ; Semicolon 186 [Alt Control]');
    await keyboard.up(';');
    expect(await page.evaluate(() => getResult())).toBe('Keyup: ; Semicolon 186 [Alt Control]');
    await keyboard.up('Control');
    expect(await page.evaluate(() => getResult())).toBe('Keyup: Control ControlLeft 17 [Alt]');
    await keyboard.up('Alt');
    expect(await page.evaluate(() => getResult())).toBe('Keyup: Alt AltLeft 18 []');
  });
  it('should send proper codes while typing', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/keyboard.html');
    await page.keyboard.type('!');
    expect(await page.evaluate(() => getResult())).toBe(
        [ 'Keydown: ! Digit1 49 []',
          'Keypress: ! Digit1 33 33 []',
          'Keyup: ! Digit1 49 []'].join('\n'));
    await page.keyboard.type('^');
    expect(await page.evaluate(() => getResult())).toBe(
        [ 'Keydown: ^ Digit6 54 []',
          'Keypress: ^ Digit6 94 94 []',
          'Keyup: ^ Digit6 54 []'].join('\n'));
  });
  it('should send proper codes while typing with shift', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/keyboard.html');
    const keyboard = page.keyboard;
    await keyboard.down('Shift');
    await page.keyboard.type('~');
    expect(await page.evaluate(() => getResult())).toBe(
        [ 'Keydown: Shift ShiftLeft 16 [Shift]',
          'Keydown: ~ Backquote 192 [Shift]', // 192 is ` keyCode
          'Keypress: ~ Backquote 126 126 [Shift]', // 126 is ~ charCode
          'Keyup: ~ Backquote 192 [Shift]'].join('\n'));
    await keyboard.up('Shift');
  });
  it('should not type canceled events', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    await page.focus('textarea');
    await page.evaluate(() => {
      window.addEventListener('keydown', event => {
        event.stopPropagation();
        event.stopImmediatePropagation();
        if (event.key === 'l')
          event.preventDefault();
        if (event.key === 'o')
          event.preventDefault();
      }, false);
    });
    await page.keyboard.type('Hello World!');
    expect(await page.evaluate(() => textarea.value)).toBe('He Wrd!');
  });
  itFailsFirefox('should specify repeat property', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    await page.focus('textarea');
    await page.evaluate(() => document.querySelector('textarea').addEventListener('keydown', e => window.lastEvent = e, true));
    await page.keyboard.down('a');
    expect(await page.evaluate(() => window.lastEvent.repeat)).toBe(false);
    await page.keyboard.press('a');
    expect(await page.evaluate(() => window.lastEvent.repeat)).toBe(true);

    await page.keyboard.down('b');
    expect(await page.evaluate(() => window.lastEvent.repeat)).toBe(false);
    await page.keyboard.down('b');
    expect(await page.evaluate(() => window.lastEvent.repeat)).toBe(true);

    await page.keyboard.up('a');
    await page.keyboard.down('a');
    expect(await page.evaluate(() => window.lastEvent.repeat)).toBe(false);
  });
  itFailsFirefox('should type all kinds of characters', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    await page.focus('textarea');
    const text = 'This text goes onto two lines.\nThis character is 嗨.';
    await page.keyboard.type(text);
    expect(await page.evaluate('result')).toBe(text);
  });
  itFailsFirefox('should specify location', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    await page.evaluate(() => {
      window.addEventListener('keydown', event => window.keyLocation = event.location, true);
    });
    const textarea = await page.$('textarea');

    await textarea.press('Digit5');
    expect(await page.evaluate('keyLocation')).toBe(0);

    await textarea.press('ControlLeft');
    expect(await page.evaluate('keyLocation')).toBe(1);

    await textarea.press('ControlRight');
    expect(await page.evaluate('keyLocation')).toBe(2);

    await textarea.press('NumpadSubtract');
    expect(await page.evaluate('keyLocation')).toBe(3);
  });
  it('should throw on unknown keys', async() => {
    const {page} = getTestState();

    let error = await page.keyboard.press('NotARealKey').catch(e => e);
    expect(error.message).toBe('Unknown key: "NotARealKey"');

    error = await page.keyboard.press('ё').catch(e => e);
    expect(error && error.message).toBe('Unknown key: "ё"');

    error = await page.keyboard.press('😊').catch(e => e);
    expect(error && error.message).toBe('Unknown key: "😊"');
  });
  itFailsFirefox('should type emoji', async() => {
    const {page, server} = getTestState();

    await page.goto(server.PREFIX + '/input/textarea.html');
    await page.type('textarea', '👹 Tokyo street Japan 🇯🇵');
    expect(await page.$eval('textarea', textarea => textarea.value)).toBe('👹 Tokyo street Japan 🇯🇵');
  });
  itFailsFirefox('should type emoji into an iframe', async() => {
    const {page, server} = getTestState();

    await page.goto(server.EMPTY_PAGE);
    await utils.attachFrame(page, 'emoji-test', server.PREFIX + '/input/textarea.html');
    const frame = page.frames()[1];
    const textarea = await frame.$('textarea');
    await textarea.type('👹 Tokyo street Japan 🇯🇵');
    expect(await frame.$eval('textarea', textarea => textarea.value)).toBe('👹 Tokyo street Japan 🇯🇵');
  });
  itFailsFirefox('should press the meta key', async() => {
    const {page, isFirefox} = getTestState();

    await page.evaluate(() => {
      window.result = null;
      document.addEventListener('keydown', event => {
        window.result = [event.key, event.code, event.metaKey];
      });
    });
    await page.keyboard.press('Meta');
    const [key, code, metaKey] = await page.evaluate('result');
    if (isFirefox && os.platform() !== 'darwin')
      expect(key).toBe('OS');
    else
      expect(key).toBe('Meta');

    if (isFirefox)
      expect(code).toBe('OSLeft');
    else
      expect(code).toBe('MetaLeft');

    if (isFirefox && os.platform() !== 'darwin')
      expect(metaKey).toBe(false);
    else
      expect(metaKey).toBe(true);

  });
});