/*
 * Copyright (c) 2018 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 *
 * SPDX-License-Identifier: EPL-1.0
 */

import { injectable, inject } from 'inversify';
import { StatusBar, StatusBarAlignment } from '@theia/core/lib/browser/status-bar/status-bar';
import { GithubService } from '../common/github-service';
import { GitHubProperties } from './github-properties';
import { User } from '../common/github-model';
import { GITHUB_COMMANDS } from './github-commands';
import { FrontendApplicationContribution, FrontendApplication } from '@theia/core/lib/browser';

@injectable()
export class GitHubFrontendContribution implements FrontendApplicationContribution {

  constructor(
    @inject(StatusBar) protected readonly statusBar: StatusBar,
    @inject(GitHubProperties) protected readonly gitHubProperties: GitHubProperties,
    @inject(GithubService) protected readonly gitHubService: GithubService
  ) {
    this.gitHubProperties.onPropertiesChange(() => {
      this.updateStatusBar();
    });
  }

  onStart(app: FrontendApplication): void {
  }

  protected updateStatusBar() {
    this.gitHubService.getCurrentUser(this.gitHubProperties.getProperties())
      .then(user => this.onUserChanged(user))
      .catch(error => this.onUserChanged(undefined));
  }

  protected onUserChanged(user: User | undefined): void {
    if (user) {
      this.statusBar.setElement(
        'github',
        { text: '$(github-alt) ' + user.login, alignment: StatusBarAlignment.LEFT });
    } else {
      this.statusBar.setElement(
        'github',
        { text: '$(github-alt) not authorized', alignment: StatusBarAlignment.LEFT, command: GITHUB_COMMANDS.OPEN_CONFIGURATION.id });
    }
  }
}