import {Injectable, ViewContainerRef} from '@angular/core';
import {ToastrService} from 'ngx-toastr';
import {NetworkService} from './network/network.service';
import {AuthenticationService} from './network/authentication.service';
import {NotificationDTO, NotificationType} from '../../../common/entities/NotificationDTO';
import {UserDTO, UserRoles} from '../../../common/entities/UserDTO';
import {I18n} from '@ngx-translate/i18n-polyfill';

@Injectable()
export class NotificationService {

  options = {
    positionClass: 'toast-top-center',
    animate: 'flyLeft'
  };
  notifications: NotificationDTO[] = [];
  lastUser: UserDTO = null;

  constructor(private _toastr: ToastrService,
              private _networkService: NetworkService,
              private _authService: AuthenticationService,
              public i18n: I18n) {

    this._authService.user.subscribe(() => {
      if (this._authService.isAuthenticated() &&
        (!this.lastUser ||
          this.lastUser.id !== this._authService.user.value.id) &&
        this._authService.user.value.role >= UserRoles.Guest) {
        this.getServerNotifications();
      }
      this.lastUser = this._authService.user.value;
    });
  }

  async getServerNotifications() {
    this.notifications = await this._networkService.getJson<NotificationDTO[]>('/notifications');
    this.notifications.forEach((noti) => {
      let msg = noti.message;
      if (noti.details) {
        msg += ' Details: ' + JSON.stringify(noti.details);
      }
      switch (noti.type) {
        case  NotificationType.error:
          this.error(msg, this.i18n('Server error'));
          break;
        case  NotificationType.warning:
          this.warning(msg, this.i18n('Server error'));
          break;
        case  NotificationType.info:
          this.info(msg, this.i18n('Server info'));
          break;
      }
    });
  }

  success(text, title = null) {
    this._toastr.success(text, title, this.options);
  }

  error(text, title?) {
    this._toastr.error(text, title, this.options);
  }

  warning(text, title?) {
    this._toastr.warning(text, title, this.options);
  }

  info(text, title = null) {
    this._toastr.info(text, title, this.options);
  }


  get Toastr(): ToastrService {
    return this._toastr;
  }
}