import { Injectable } from '@angular/core';
import { Http, Response, Headers } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import { NgForm } from '@angular/forms';

import 'rxjs/Rx';
import 'rxjs/add/operator/map';

@Injectable()
export class AuthService {

  constructor(private http: Http) { }

  public login(username: string, password: string) {
        return this.http.post<any>('/api/authenticate', { username: username, password: password })
            .map(user => {
                if (user && user.token) {
                    localStorage.setItem('currentUser', JSON.stringify(user));
                }
                return user;
            });
    }

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