import { Injectable } from '@angular/core';
import { Headers, Http } from '@angular/http';

import 'rxjs/add/operator/toPromise';

import { BusStop } from '../models/bus-stop';

@Injectable()
export class BusStopService {
  private url = 'http://localhost:5000/busstop';
  private headers = new Headers({'Content-Type': 'application/json'});
  constructor(private http: Http) { }
  getData(from: number = 0, to: number = 100, sort: string = null): Promise<BusStop[]> {
    let url = this.url;
    url += '?from=' + from + '&to=' + to;
    if (sort) {
      url += '&sort=' + sort;
    }
    return this.http.get(url)
      .toPromise()
      .then(response => response.json().busStopEditDsM as BusStop[])
      .catch(this.handleError);
  }
  update(id: number, data: string): Promise<any> {
    return this.http.post(this.url + '/update?id=' + id, data, { headers: this.headers })
      .toPromise()
      .then(response => response.json())
      .catch(this.handleError);
  }
  create(data: string): Promise<BusStop> {
    return this.http.post(this.url + '/create', data, { headers: this.headers })
      .toPromise()
      .then(response => response.json() as BusStop)
      .catch(this.handleError);
  }
  delete(id: number): Promise<any> {
    return this.http.delete(this.url + '/delete?id=' + id, { headers: this.headers })
      .toPromise()
      .then(response => response.json())
      .catch(this.handleError);
  }
  private handleError(error: any): Promise<any> {
    console.error('An error occured', error);
    return Promise.reject(error.message || error);
  }
}