/**
   * docs in {@link PurchaseObserver#onPurchaseStateChange(com.soomla.billing.Consts.PurchaseState,
   * String, long, String)}.
   */
  @Override
  public void onPurchaseStateChange(
      Consts.PurchaseState purchaseState,
      String productId,
      long purchaseTime,
      String developerPayload) {
    try {
      PurchasableVirtualItem purchasableVirtualItem = StoreInfo.getPurchasableItem(productId);

      BusProvider.getInstance()
          .post(new PlayPurchaseEvent(purchasableVirtualItem, developerPayload));

      if (purchaseState == Consts.PurchaseState.PURCHASED) {
        purchasableVirtualItem.give(1);
      }

      if (purchaseState == Consts.PurchaseState.REFUNDED) {
        if (!StoreConfig.friendlyRefunds) {
          purchasableVirtualItem.take(1);
        }
      }

      BusProvider.getInstance().post(new ItemPurchasedEvent(purchasableVirtualItem));
    } catch (VirtualItemNotFoundException e) {
      StoreUtils.LogError(
          TAG,
          "ERROR : Couldn't find the "
              + purchaseState.name()
              + " VirtualCurrencyPack OR GoogleMarketItem  with productId: "
              + productId
              + ". It's unexpected so an unexpected error is being emitted.");
      BusProvider.getInstance().post(new UnexpectedStoreErrorEvent());
    }
  }
  /**
   * docs in {@link
   * PurchaseObserver#onRequestPurchaseResponse(com.soomla.billing.BillingService.RequestPurchase,
   * com.soomla.billing.Consts.ResponseCode)}.
   */
  @Override
  public void onRequestPurchaseResponse(
      BillingService.RequestPurchase request, Consts.ResponseCode responseCode) {
    if (responseCode == Consts.ResponseCode.RESULT_OK) {
      // purchase was sent to server
    } else if (responseCode == Consts.ResponseCode.RESULT_USER_CANCELED) {

      try {
        BusProvider.getInstance()
            .post(new PlayPurchaseCancelledEvent(StoreInfo.getPurchasableItem(request.mProductId)));
      } catch (VirtualItemNotFoundException e) {
        StoreUtils.LogError(
            TAG,
            "ERROR : Couldn't find the CANCELLED VirtualCurrencyPack OR GoogleMarketItem  with productId: "
                + request.mProductId
                + ". It's unexpected so an unexpected error is being emitted.");
        BusProvider.getInstance().post(new UnexpectedStoreErrorEvent());
      }

    } else {
      // purchase failed !

      BusProvider.getInstance().post(new UnexpectedStoreErrorEvent());
      StoreUtils.LogError(TAG, "ERROR : Purchase failed for productId: " + request.mProductId);
    }
  }
  /**
   * Start a purchase process with Google Play.
   *
   * @param googleMarketItem is the item to purchase. This item has to be defined EXACTLY the same
   *     in Google Play.
   * @param payload a payload to get back when this purchase is finished.
   */
  public boolean buyWithGooglePlay(GoogleMarketItem googleMarketItem, String payload) {
    if (!checkInit()) return false;

    SharedPreferences prefs =
        new ObscuredSharedPreferences(
            SoomlaApp.getAppContext(),
            SoomlaApp.getAppContext()
                .getSharedPreferences(StoreConfig.PREFS_NAME, Context.MODE_PRIVATE));
    String publicKey = prefs.getString(StoreConfig.PUBLIC_KEY, "");
    if (publicKey.isEmpty() || publicKey.equals("[YOUR PUBLIC KEY FROM GOOGLE PLAY]")) {
      StoreUtils.LogError(TAG, "You didn't provide a public key! You can't make purchases.");
      return false;
    }

    if (!mBillingService.requestPurchase(
        googleMarketItem.getProductId(), Consts.ITEM_TYPE_INAPP, payload)) {
      return false;
    }
    try {
      BusProvider.getInstance()
          .post(
              new PlayPurchaseStartedEvent(
                  StoreInfo.getPurchasableItem(googleMarketItem.getProductId())));
    } catch (VirtualItemNotFoundException e) {
      StoreUtils.LogError(
          TAG,
          "Couldn't find a purchasable item with productId: " + googleMarketItem.getProductId());
    }
    return true;
  }