import {Component, OnInit} from '@angular/core';
// 路由
import {NavigationStart, Router} from '@angular/router';
// 国际化服务
import {TranslateService} from '@ngx-translate/core';
// 路由事件
import {Observable} from 'rxjs';
import {filter} from 'rxjs/operators';
// cookie操作
import {CookieService} from 'ngx-cookie-service';
// 环境变量
import {environment} from '../environments/environment';
import {LoginService} from './account/login/login.service';
import {Result} from './interface/Result';
import {MessageService} from './message/message.service';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {

  // 登陆状态
  isLogin = false;
  // 当前登陆账户
  managerName = null;

  navStart: Observable<NavigationStart>;

  /**
   *
   * @param translate 国际化
   * @param router 路由器
   * @param cookieService cookie管理服务
   * @param loginService 登陆服务
   * @param messageService 信息反馈服务
   */
  constructor(
    public translate: TranslateService,
    private router: Router,
    private cookieService: CookieService,
    private loginService: LoginService,
    private messageService: MessageService,
  ) {
    this.navStart = router.events.pipe(
      filter(evt => evt instanceof NavigationStart)
    ) as Observable<NavigationStart>;
  }

  /**
   * 注销登录
   */
  logout() {
    this.loginService.logout().subscribe(r => {
      if (r.result === Result.OK) {
        this.cookieService.deleteAll();
        this.messageService.info('注销成功');
        this.router.navigateByUrl('/login');
      } else {
        alert('注销失败');
      }
    });
  }

  async ngOnInit() {
    this.navStart.subscribe(evt => {

      this.isLogin = this.cookieService.check(environment.tokenKey);
      this.managerName = this.cookieService.get(environment.managerKey);
      if (evt.url !== '/forum' && this.isLogin) {
        this.router.navigateByUrl('/forum');
      } else if (evt.url !== '/login' && !this.isLogin) {
        this.router.navigateByUrl('/login');
      } else {
        console.debug('当前路由' + evt.url + '不需要重定向');
      }

    });

    // 语言初始化(若未设置语言, 则取浏览器语言)
    const currentLanguage = await localStorage.getItem('currentLanguage') || this.translate.getBrowserCultureLang();
    // 当在assets/i18n中找不到对应的语言翻译时，使用'zh-CN'作为默认语言
    this.translate.setDefaultLang('zh-CN');
    this.translate.use(currentLanguage);
    // 记录当前设置的语言
    localStorage.setItem('currentLanguage', currentLanguage);
  }

}