bool IsVoucherThresholdMet(OfferVoucher voucher)
{
bool isValid = false;
const decimal thresholdBoundary = 0.01m;
decimal adjustedPrice = _originalPrice;
List <Product> invalidThresholdItems = BasketItems.Where(w => w.Category == "Gift Vouchers").ToList();
if (invalidThresholdItems.Count > 0)
{
decimal totalInvalidCost = 0;
foreach (Product product in invalidThresholdItems)
{
totalInvalidCost = totalInvalidCost + product.Price;
}
adjustedPrice = (adjustedPrice - totalInvalidCost);
}
decimal remainingCostToReachThreshold = (voucher.Threshold - adjustedPrice) + thresholdBoundary;
if ((invalidThresholdItems.Count() == 0 && _originalPrice > voucher.Threshold) || remainingCostToReachThreshold <= 0)
{
isValid = true;
}
else
{
_errorMessage = $"You have not reached the spend threshold for the voucher {voucher.VoucherCode}. Spend another £{remainingCostToReachThreshold} to receive the £{voucher.Discount} discount from your basket total.";
}
return(isValid);
}
bool IsCategoryOfferVoucherValid(CategoryOfferVoucher voucher)
{
bool isValid = false;
if (IsVoucherThresholdMet(voucher))
{
List <Product> qualifyingProducts = BasketItems.Where(w => w.Category == voucher.ProductCategory).ToList();
if (qualifyingProducts.Count > 0)
{
decimal qualifyingProductsTotalPrice = 0;
decimal adjustedProductDiscount = 0;
foreach (Product product in qualifyingProducts)
{
qualifyingProductsTotalPrice = qualifyingProductsTotalPrice + product.Price;
}
if (voucher.Discount > qualifyingProductsTotalPrice)
{
adjustedProductDiscount = adjustedProductDiscount + qualifyingProductsTotalPrice;
}
isValid = true;
_discountTotal = _discountTotal + adjustedProductDiscount;
}
else
{
_errorMessage = $"There are no products in your basket applicable to voucher {voucher.VoucherCode}.";
}
}
return(isValid);
}
