import {Injectable} from "@angular/core";
import {Http, Response} from "@angular/http";
import "rxjs/add/operator/map";

import {AppConfig} from "../../app.config";
import {AppUser} from "../../models/model-interfaces";
import {AwardingService} from "../awarding-service/awarding.service";
import {PromotionService} from "../promotion-service/promotion.service";

@Injectable()
export class LoginService {
  constructor(private http: Http,
              private config: AppConfig,
              private awardingService: AwardingService,
              private promotionService: PromotionService) {
  }

  login(username: string, password: string) {
    return this.http.post(this.config.apiAuthenticationPath, {username: username, password: password})
      .map((response: Response) => {
        // login successful if there's a jwt token in the response
        let user = response.json();
        if (user && user.token) {
          // store user details and jwt token in local storage to keep user logged in between page refreshes
          localStorage.setItem('currentUser', JSON.stringify(user));
          if (user.permission >= 2) {
            const fraction = user.squad.fraction;
            this.awardingService.checkUnprocessedAwards(fraction);
            this.promotionService.checkUnconfirmedPromotions(fraction);
          }
        }
      });
  }

  signUp(username: string, password: string, secret: string) {
    return this.http.post(this.config.apiSignupPath, {username: username, password: password, secret: secret})
      .map((response: Response) => {

      });
  }

  logout() {
    // remove user from local storage
    localStorage.removeItem('currentUser');
  }

  isLoggedIn() {
    if (localStorage.getItem('currentUser')) {
      return true;
    }
    return false
  }

  hasPermission(level: number) {
    let currentUser = JSON.parse(localStorage.getItem('currentUser'));
    return this.isLoggedIn() && currentUser.permission >= level;
  }

  getCurrentUser(): AppUser {
    return JSON.parse(localStorage.getItem('currentUser'));
  }

  hasSquad() {
    let currentUser = JSON.parse(localStorage.getItem('currentUser'));
    return currentUser.squad != null;
  }

}