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

// Generated class for the ProductsService provider.


// See https://angular.io/docs/ts/latest/guide/dependency-injection.html
// for more info on providers and Angular 2 DI.
@Injectable()
export class ProductsProvider {
  data: Product[];

  constructor(public apiProvider: ApiProvider) {
    this.data = null;
  }

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

    return promise;
  }

  // http://139.91.230.7:5000/v1/products/57b673c6c2d8c14c72748273?tenantId=57b540a3d4c62844f361a893
  retrieve(tenantId: string, storeId: string) {
    let payload: any = {};
    payload.tenantId = tenantId;
    let promise = new Promise((resolve, reject) => {
        // check data
        // if (this.data) { resolve(this.data);
        // }else {
        if (this.data === null){
          this.apiProvider.api('GET', `/v1/products/${storeId}`, payload)
          .then((response: any) => {
              this.data = this.deserializeProducts(response);
              resolve(this.data); // cast
          },  (err) => { // catch error
            // @todo: We should check for errors ?!?
                reject(err);
              });
            // uncomment with if 
            // }
      }
      else resolve(this.data);
    });

    return promise;
  }

   deserializeProducts(incoming: any) {
    let products: Product[] = _.map((_.values(incoming)), Product.fromJson);
    return products;
  }

  getProduct(productId: string) {
      let product: Product = _.find(this.data, function(obj) { return obj.id === productId; } );
      return product;
  }

  
  retrieveBySKU(tenantId: string, storeId: string, SKU: string) {
    let promise = new Promise <Product> ((resolve, reject) => {
      let product: Product = _.find(this.data, function(obj) { return obj.getSKU() === SKU; } );
      if(_.isUndefined(product)){
        let payload: any = {};
        payload.tenantId = tenantId;
        payload.sku = SKU;
        this.apiProvider.api('GET', `/v1/products/${storeId}`, payload).then(
          (response: Product) => {
            if (response.id) {
              // this.carts[response._id] = response;
              // this.cartState(response);
              // const cart = Cart.fromJson(response);
              let product: Product = Product.fromJson(response);
              this.data.push(product)
              resolve(product);
          } 
          else {
            reject();
          }
        },  (err) => { // catch error
          // @todo: We should check for errors ?!?
              reject(err);
            // })         
        });
      }
      else{
        resolve(product);
      }
    });
    return promise;
  }

}