import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { BehaviorSubject, Observable } from 'rxjs';
import { map } from 'rxjs/operators';

import { environment } from '../../environments/environment';
import { User } from './user';

@Injectable({
  providedIn: 'root'
})
export class AccountService {
  private userSubject: BehaviorSubject<User>;
  public user: Observable<User>;

  constructor(private httpClient: HttpClient) {
    this.userSubject = new BehaviorSubject<User>(JSON.parse(localStorage.getItem('user')));
    this.user = this.userSubject.asObservable();
  }

  public get userValue() {
    return this.userSubject.value;
  }

  login(username, password) {
    return this.httpClient.post<User>(environment.apiUrl + '/fake_login', { username, password })
      .pipe((map(user => {
        localStorage.setItem('user', JSON.stringify(user));
        this.userSubject.next(user);
        return user;
      })))
  }

  register(user) {
    return this.httpClient.post<User>(environment.apiUrl + '/fake_registration', user);
  }

}