/**
 * 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 fs = require('fs');
const formidable = require('formidable');

const FILE_TO_UPLOAD = path.join(__dirname, '/assets/file-to-upload.txt');
const {FFOX, CHROMIUM, WEBKIT} = require('./utils').testOptions(browserType);

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.setInputFiles', function() {
  it('should work', async({page}) => {
    await page.setContent(`<input type=file>`);
    await page.setInputFiles('input', path.join(__dirname, '/assets/file-to-upload.txt'));
    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 set from memory', async({page}) => {
    await page.setContent(`<input type=file>`);
    await page.setInputFiles('input', {
      name: 'test.txt',
      mimeType: 'text/plain',
      buffer: Buffer.from('this is a test')
    });
    expect(await page.$eval('input', input => input.files.length)).toBe(1);
    expect(await page.$eval('input', input => input.files[0].name)).toBe('test.txt');
  });
});

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.$eval('input', input => input.click()),
    ]);
    expect(fileChooser1 === fileChooser2).toBe(true);
  });
  it('should accept single file', async({page, server}) => {
    await page.setContent(`<input type=file oninput='javascript:console.timeStamp()'>`);
    const [fileChooser] = await Promise.all([
      page.waitForEvent('filechooser'),
      page.click('input'),
    ]);
    expect(fileChooser.page()).toBe(page);
    expect(fileChooser.element()).toBeTruthy();
    await fileChooser.setFiles(FILE_TO_UPLOAD);
    expect(await page.$eval('input', input => input.files.length)).toBe(1);
    expect(await page.$eval('input', input => input.files[0].name)).toBe('file-to-upload.txt');
  });
  it('should detect mime type', async({page, server}) => {
    let files;
    server.setRoute('/upload', async (req, res) => {
      const form = new formidable.IncomingForm();
      form.parse(req, function(err, fields, f) {
        files = f;
        res.end();
      });
    });
    await page.goto(server.EMPTY_PAGE);
    await page.setContent(`
      <form action="/upload" method="post" enctype="multipart/form-data" >
        <input type="file" name="file1">
        <input type="file" name="file2">
        <input type="submit" value="Submit">
      </form>`)
    await (await page.$('input[name=file1]')).setInputFiles(path.join(__dirname, '/assets/file-to-upload.txt'));
    await (await page.$('input[name=file2]')).setInputFiles(path.join(__dirname, '/assets/pptr.png'));
    await Promise.all([
      page.click('input[type=submit]'),
      server.waitForRequest('/upload'),
    ]);
    const { file1, file2 } = files;
    expect(file1.name).toBe('file-to-upload.txt');
    expect(file1.type).toBe('text/plain');
    expect(fs.readFileSync(file1.path).toString()).toBe(
      fs.readFileSync(path.join(__dirname, '/assets/file-to-upload.txt')).toString());
    expect(file2.name).toBe('pptr.png');
    expect(file2.type).toBe('image/png');
    expect(fs.readFileSync(file2.path).toString()).toBe(
      fs.readFileSync(path.join(__dirname, '/assets/pptr.png')).toString());
  });
  it('should be able to read selected file', async({page, server}) => {
    await page.setContent(`<input type=file>`);
    const [, content] = await Promise.all([
      page.waitForEvent('filechooser').then(fileChooser => fileChooser.setFiles(FILE_TO_UPLOAD)),
      page.$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);
      }),
    ]);
    expect(content).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>`);
    const [, fileLength1] = await Promise.all([
      page.waitForEvent('filechooser').then(fileChooser => fileChooser.setFiles(FILE_TO_UPLOAD)),
      page.$eval('input', async picker => {
        picker.click();
        await new Promise(x => picker.oninput = x);
        return picker.files.length;
      }),
    ]);
    expect(fileLength1).toBe(1);
    const [, fileLength2] = await Promise.all([
      page.waitForEvent('filechooser').then(fileChooser => fileChooser.setFiles([])),
      page.$eval('input', async picker => {
        picker.click();
        await new Promise(x => picker.oninput = x);
        return picker.files.length;
      }),
    ]);
    expect(fileLength2).toBe(0);
  });
  it('should not accept multiple files for single-file input', async({page, server}) => {
    await page.setContent(`<input type=file>`);
    const [fileChooser] = await Promise.all([
      page.waitForEvent('filechooser'),
      page.click('input'),
    ]);
    let error = null;
    await fileChooser.setFiles([
      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);
  });
  it('should emit input and change events', async({page, server}) => {
    const events = [];
    await page.exposeFunction('eventHandled', e => events.push(e));
    await page.setContent(`
    <input id=input type=file></input>
    <script>
      input.addEventListener('input', e => eventHandled({ type: e.type }));
      input.addEventListener('change', e => eventHandled({ type: e.type }));
    </script>`);
    await (await page.$('input')).setInputFiles(FILE_TO_UPLOAD);
    expect(events.length).toBe(2);
    expect(events[0].type).toBe('input');
    expect(events[1].type).toBe('change');
  });
});

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