// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import * as Host from '../host/host.js';
import * as UI from '../ui/ui.js';

import {latestReleaseNote, ReleaseNote, releaseNoteViewId} from './HelpImpl.js';  // eslint-disable-line no-unused-vars

export class ReleaseNoteView extends UI.Widget.VBox {
  constructor() {
    super(true);
    this.registerRequiredCSS('help/releaseNote.css', {enableLegacyPatching: true});
    this._releaseNoteElement = this._createReleaseNoteElement(latestReleaseNote());
    const topSection = this.contentElement.createChild('div', 'release-note-top-section');
    topSection.textContent = ls`${latestReleaseNote().header}`;
    this.contentElement.appendChild(this._releaseNoteElement);
  }

  /**
   * @override
   * @return {!Array<!Element>}
   */
  elementsToRestoreScrollPositionsFor() {
    return [this._releaseNoteElement];
  }

  /**
   * @param {!ReleaseNote} releaseNote
   * @return {!Element}
   */
  _createReleaseNoteElement(releaseNote) {
    const hbox = document.createElement('div');
    hbox.classList.add('hbox');
    const container = hbox.createChild('div', 'release-note-container');
    const contentContainer = container.createChild('ul');
    UI.ARIAUtils.setAccessibleName(contentContainer, ls`${latestReleaseNote().header}`);

    let linkNumber = 1;
    for (const highlight of releaseNote.highlights) {
      const listItem = contentContainer.createChild('li');
      const linkWrapper = UI.XLink.XLink.create(highlight.link, '', 'release-note-link');
      linkWrapper.textContent = '';
      UI.ARIAUtils.markAsLink(linkWrapper);
      UI.ARIAUtils.setAccessibleName(
          linkWrapper, `${highlight.title}: ${highlight.subtitle} ${linkNumber} of ${releaseNote.highlights.length}`);

      const title = linkWrapper.createChild('div', 'release-note-title');
      title.textContent = highlight.title;

      const subtitle = linkWrapper.createChild('div', 'release-note-subtitle');
      subtitle.textContent = highlight.subtitle;

      listItem.appendChild(linkWrapper);
      linkNumber++;
    }

    const actionContainer = container.createChild('div', 'release-note-action-container');
    const learnMore = UI.UIUtils.createTextButton(ls`Learn more`, event => {
      event.consume(true);
      Host.InspectorFrontendHost.InspectorFrontendHostInstance.openInNewTab(releaseNote.link);
    });
    UI.ARIAUtils.markAsLink(learnMore);
    actionContainer.appendChild(learnMore);

    actionContainer.appendChild(UI.UIUtils.createTextButton(ls`Close`, event => {
      event.consume(true);
      UI.InspectorView.InspectorView.instance().closeDrawerTab(releaseNoteViewId, true);
    }, 'close-release-note'));

    const imageLink = /** @type {!HTMLElement} */ (UI.XLink.XLink.create(releaseNote.link, ' '));
    imageLink.classList.add('release-note-image');
    UI.Tooltip.Tooltip.install(imageLink, ls`${latestReleaseNote().header}`);

    hbox.appendChild(imageLink);
    const image = /** @type {!HTMLImageElement} */ (imageLink.createChild('img'));
    image.src = 'Images/whatsnew.png';
    UI.Tooltip.Tooltip.install(image, UI.Tooltip.Tooltip.getContent(imageLink));
    image.alt = UI.Tooltip.Tooltip.getContent(image);

    return hbox;
  }
}