import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
import { BehaviorSubject, Observable } from 'rxjs';
import { map } from 'rxjs/operators';
import { User } from '../_models/user';

@Injectable({
  providedIn: 'root'
})
export class AuthenticationService {

  private currentUserSubject: BehaviorSubject<User>;
  public currentUser: Observable<User>;

  private baseUrl = 'http://localhost:8080/';
  private captchaUrl = this.baseUrl+'capchaverify';

  constructor(private http: HttpClient) {
    this.currentUserSubject = new BehaviorSubject<User>(JSON.parse(localStorage.getItem('currentUser')));
    this.currentUser = this.currentUserSubject.asObservable();
  }

  httpOptions = {
    headers: new HttpHeaders({
      'Content-Type':'application/json'
    })
  }

  public get currentUserValue(): User {
    return this.currentUserSubject.value;
  }

  login(email: string, password: string) {
    return this.http.post<any>(`auth/login`, { email, password })
      // .subscribe(user => {
      .pipe(map(user => {
        if (user && user.token) {
          // store user details in local storage to keep user logged in
          localStorage.setItem('currentUser', JSON.stringify(user.result));
          sessionStorage.setItem('roleName',user.roleName);
          this.currentUserSubject.next(user);
        }

        return user;
      }));
  }

  logout() {
    // remove user data from local storage for log out
    localStorage.removeItem('currentUser');
    this.currentUserSubject.next(null);
  }

  send(data): Observable<any> {
    return this.http.post<any>(this.captchaUrl,data,this.httpOptions);
  }

}