/**
 * Copyright 2017 Google Inc. All rights reserved.
 * Modifications copyright (c) Microsoft Corporation.
 *
 * 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 path = require('path');

const FILE_TO_UPLOAD = path.join(__dirname, '/assets/file-to-upload.txt');

module.exports.describe = function({testRunner, expect, playwright, FFOX, CHROME, WEBKIT}) {
  const {describe, xdescribe, fdescribe} = testRunner;
  const {it, fit, xit, dit} = testRunner;
  const {beforeAll, beforeEach, afterAll, afterEach} = testRunner;
  describe('input', function() {
    it('should upload the file', async({page, server}) => {
      await page.goto(server.PREFIX + '/input/fileupload.html');
      const filePath = path.relative(process.cwd(), FILE_TO_UPLOAD);
      const input = await page.$('input');
      await input.setInputFiles(filePath);
      expect(await page.evaluate(e => e.files[0].name, input)).toBe('file-to-upload.txt');
      expect(await page.evaluate(e => {
        const reader = new FileReader();
        const promise = new Promise(fulfill => reader.onload = fulfill);
        reader.readAsText(e.files[0]);
        return promise.then(() => reader.result);
      }, input)).toBe('contents of the file');
    });
  });

  describe('Page.waitForFileChooser', function() {
    it('should emit event', async({page, server}) => {
      await page.setContent(`<input type=file>`);
      const [chooser] = await Promise.all([
        new Promise(f => page.once('filechooser', f)),
        page.click('input'),
      ]);
      expect(chooser).toBeTruthy();
    });
    it('should work when file input is attached to DOM', async({page, server}) => {
      await page.setContent(`<input type=file>`);
      const [chooser] = await Promise.all([
        page.waitForEvent('filechooser'),
        page.click('input'),
      ]);
      expect(chooser).toBeTruthy();
    });
    it('should work when file input is not attached to DOM', async({page, server}) => {
      const [chooser] = await Promise.all([
        page.waitForEvent('filechooser'),
        page.evaluate(() => {
          const el = document.createElement('input');
          el.type = 'file';
          el.click();
        }),
      ]);
      expect(chooser).toBeTruthy();
    });
    it('should respect timeout', async({page, server}) => {
      let error = null;
      await page.waitForEvent('filechooser', {timeout: 1}).catch(e => error = e);
      expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
    });
    it('should respect default timeout when there is no custom timeout', async({page, server}) => {
      page.setDefaultTimeout(1);
      let error = null;
      await page.waitForEvent('filechooser').catch(e => error = e);
      expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
    });
    it('should prioritize exact timeout over default timeout', async({page, server}) => {
      page.setDefaultTimeout(0);
      let error = null;
      await page.waitForEvent('filechooser', {timeout: 1}).catch(e => error = e);
      expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
    });
    it('should work with no timeout', async({page, server}) => {
      const [chooser] = await Promise.all([
        page.waitForEvent('filechooser', {timeout: 0}),
        page.evaluate(() => setTimeout(() => {
          const el = document.createElement('input');
          el.type = 'file';
          el.click();
        }, 50))
      ]);
      expect(chooser).toBeTruthy();
    });
    it('should return the same file chooser when there are many watchdogs simultaneously', async({page, server}) => {
      await page.setContent(`<input type=file>`);
      const [fileChooser1, fileChooser2] = await Promise.all([
        page.waitForEvent('filechooser'),
        page.waitForEvent('filechooser'),
        page.$eval('input', input => input.click()),
      ]);
      expect(fileChooser1 === fileChooser2).toBe(true);
    });
    it('should accept single file', async({page, server}) => {
      await page.setContent(`<input type=file oninput='javascript:console.timeStamp()'>`);
      const [{ element }] = await Promise.all([
        page.waitForEvent('filechooser'),
        page.click('input'),
      ]);
      await element.setInputFiles(FILE_TO_UPLOAD);
      expect(await page.$eval('input', input => input.files.length)).toBe(1);
      expect(await page.$eval('input', input => input.files[0].name)).toBe('file-to-upload.txt');
    });
    it('should be able to read selected file', async({page, server}) => {
      await page.setContent(`<input type=file>`);
      page.waitForEvent('filechooser').then(({element}) => element.setInputFiles(FILE_TO_UPLOAD));
      expect(await page.$eval('input', async picker => {
        picker.click();
        await new Promise(x => picker.oninput = x);
        const reader = new FileReader();
        const promise = new Promise(fulfill => reader.onload = fulfill);
        reader.readAsText(picker.files[0]);
        return promise.then(() => reader.result);
      })).toBe('contents of the file');
    });
    it('should be able to reset selected files with empty file list', async({page, server}) => {
      await page.setContent(`<input type=file>`);
      page.waitForEvent('filechooser').then(({element}) => element.setInputFiles(FILE_TO_UPLOAD));
      expect(await page.$eval('input', async picker => {
        picker.click();
        await new Promise(x => picker.oninput = x);
        return picker.files.length;
      })).toBe(1);
      page.waitForEvent('filechooser').then(({element}) => element.setInputFiles());
      expect(await page.$eval('input', async picker => {
        picker.click();
        await new Promise(x => picker.oninput = x);
        return picker.files.length;
      })).toBe(0);
    });
    it('should not accept multiple files for single-file input', async({page, server}) => {
      await page.setContent(`<input type=file>`);
      const [{ element }] = await Promise.all([
        page.waitForEvent('filechooser'),
        page.click('input'),
      ]);
      let error = null;
      await element.setInputFiles(
        path.relative(process.cwd(), __dirname + '/assets/file-to-upload.txt'),
        path.relative(process.cwd(), __dirname + '/assets/pptr.png')).catch(e => error = e);
      expect(error).not.toBe(null);
    });
  });

  describe('Page.waitForFileChooser isMultiple', () => {
    it('should work for single file pick', async({page, server}) => {
      await page.setContent(`<input type=file>`);
      const [{ multiple }] = await Promise.all([
        page.waitForEvent('filechooser'),
        page.click('input'),
      ]);
      expect(multiple).toBe(false);
    });
    it('should work for "multiple"', async({page, server}) => {
      await page.setContent(`<input multiple type=file>`);
      const [{ multiple }] = await Promise.all([
        page.waitForEvent('filechooser'),
        page.click('input'),
      ]);
      expect(multiple).toBe(true);
    });
    it('should work for "webkitdirectory"', async({page, server}) => {
      await page.setContent(`<input multiple webkitdirectory type=file>`);
      const [{ multiple }] = await Promise.all([
        page.waitForEvent('filechooser'),
        page.click('input'),
      ]);
      expect(multiple).toBe(true);
    });
  });
};