import { map } from 'rxjs/operators';
import { Injectable } from '@angular/core';
import { Headers, Http, RequestOptions, Response } from '@angular/http';

import { User } from '../_models/index';

@Injectable()
export class UserService {
  constructor(private http: Http) {}

  verify() {
    return this.http
      .get('/api/verify', this.jwt())
      .pipe(map((response: Response) => response.json()));
  }

  forgotPassword(email: string) {
    return this.http
      .post('/api/forgot-password', JSON.stringify({ email }), this.jwt())
      .pipe(map((response: Response) => response.json()));
  }

  getAll() {
    return this.http
      .get('/api/users', this.jwt())
      .pipe(map((response: Response) => response.json()));
  }

  getById(id: number) {
    return this.http
      .get('/api/users/' + id, this.jwt())
      .pipe(map((response: Response) => response.json()));
  }

  create(user: User) {
    return this.http
      .post('/api/users', user, this.jwt())
      .pipe(map((response: Response) => response.json()));
  }

  update(user: User) {
    return this.http
      .put('/api/users/' + user.id, user, this.jwt())
      .pipe(map((response: Response) => response.json()));
  }

  delete(id: number) {
    return this.http
      .delete('/api/users/' + id, this.jwt())
      .pipe(map((response: Response) => response.json()));
  }

  // private helper methods

  private jwt() {
    // create authorization header with jwt token
    let currentUser = JSON.parse(localStorage.getItem('currentUser'));
    if (currentUser && currentUser.token) {
      let headers = new Headers({
        Authorization: 'Bearer ' + currentUser.token
      });
      return new RequestOptions({ headers: headers });
    }
  }
}