import { Injectable } from '@angular/core';
import { Coupon } from './coupon';
import { ApiProvider } from '../../services/api/api.provider';
import 'rxjs/add/operator/map';
import * as _ from 'lodash';



@Injectable()
export class CouponProvider {

  coupons: Coupon[];
  constructor(public apiProvider: ApiProvider) {
  }

    create(couponParameters: Coupon ) {
    // TODO REMOVE
    let payload = couponParameters.toJson();
    let promise = new Promise((resolve, reject) => {
        this.apiProvider.api('POST', `/v1/coupon` , payload)
      .then((response: any) => {
        if (response.id) {
          // TODO cast to class
          resolve(response);
        } else {
          reject();
        }
      },  (err) => { // catch error
        // @todo: We should check for errors ?!?
            reject(err);
          });
      });

    return promise;
  }

  retrieveByid(couponId: string) {
    let payload: any = {};
    let promise = new Promise((resolve, reject) => {
        this.apiProvider.api('GET', `/v1/coupon/${couponId}`, payload)
      .then((response: any) => {
          if (response.id){
            resolve(Coupon.fromJson(response));
          }else {
            reject();
          }
      },  (err) => { // catch error
        // @todo: We should check for errors ?!?
            reject(err);
          });
      });

    return promise;
  }

  retrieveForLoggedUser() {
    let payload: any = {};
    let promise = new Promise((resolve, reject) => {
        if( _.isUndefined(this.coupons)){
          this.apiProvider.api('GET', `/v1/coupons`, payload)
          .then((response: any) => {
              this.coupons = _.map((_.values(response)), Coupon.fromJson);
              console.log(this.coupons);
              resolve(this.coupons);
          },  (err) => { // catch error
            // @todo: We should check for errors ?!?
                reject(err);
              });
          }
        else resolve (this.coupons);
      });

    return promise;
  }

  changestatus(id: string, status: string){
    let payload: any = {};
    let promise = new Promise((resolve, reject) => {
          this.apiProvider.api('PATCH', `/v1/coupon/${id}/status/${status}`, payload)
          .then((response: any) => {
              const coupon = Coupon.fromJson(response);
              const position = this.coupons.findIndex((item) => { return item.id === coupon.id; });
              this.coupons.splice(position, 1, coupon);
              console.log(coupon);
              resolve(coupon);
          },  (err) => { // catch error
            // @todo: We should check for errors ?!?
                reject(err);
              });
      });

    return promise;
  }

}