// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import * as i18n from '../../core/i18n/i18n.js';
import * as UI from '../../ui/legacy/legacy.js';

import type * as Lighthouse from './lighthouse.js';

const UIStrings = {
  /**
   * @description Command for showing the 'Lighthouse' tool
   */
  showLighthouse: 'Show `Lighthouse`',
} as const;

const str_ = i18n.i18n.registerUIStrings('panels/lighthouse/lighthouse-meta.ts', UIStrings);
const i18nLazyString = i18n.i18n.getLazilyComputedLocalizedString.bind(undefined, str_);

let loadedLighthouseModule: (typeof Lighthouse|undefined);

async function loadLighthouseModule(): Promise<typeof Lighthouse> {
  if (!loadedLighthouseModule) {
    loadedLighthouseModule = await import('./lighthouse.js');
  }
  return loadedLighthouseModule;
}

UI.ViewManager.registerViewExtension({
  location: UI.ViewManager.ViewLocationValues.PANEL,
  id: 'lighthouse',
  title: i18n.i18n.lockedLazyString('Lighthouse'),
  commandPrompt: i18nLazyString(UIStrings.showLighthouse),
  order: 90,
  async loadView() {
    const Lighthouse = await loadLighthouseModule();
    return Lighthouse.LighthousePanel.LighthousePanel.instance();
  },
  tags: [
    i18n.i18n.lockedLazyString('lighthouse'),
    i18n.i18n.lockedLazyString('pwa'),
  ],
});