internal void ApplyDiscount(DatedDiscount datedDiscount)
{
if (datedDiscount.DoesApplyTo(_product))
{
_appliedDiscount = new AppliedDiscount(datedDiscount.DiscountPercent, _appliedDiscount);
}
}
public void UpdateOffers(Holidays holiday, AppliedDiscount discount)
{
if (AppliedOffers.ContainsKey(holiday))
{
AppliedOffers.Remove(holiday);
}
AppliedOffers.Add(holiday, discount);
}
public AppliedDiscount CalculateDiscount(IEnumerable <ParcelOrderOutputItem> items)
{
var appliedDiscount = new AppliedDiscount
{
TotalCost = items.Select(i => i.Cost).Sum()
};
var groupedByParcelDiscountType = items.GroupBy(g => new
{
g.DiscountTypes,
g.ParcelType
});
groupedByParcelDiscountType.ToList().ForEach(grp =>
{
var discountRule = (_configuredDiscounts.Where(t => t.DiscountTypes.Equals(grp.Key.DiscountTypes))).SingleOrDefault();
if (discountRule != null)
{
var totalCounts = grp.Count();
var groups = Math.Abs(totalCounts / discountRule.Limit);
if (groups <= 0)
{
return;
}
var i = 0;
IEnumerable <ParcelOrderOutputItem> modifiedGroup = grp;
do
{
var min = modifiedGroup.Select(m => m.Cost).Min();
appliedDiscount.SavedCost += min;
appliedDiscount.TotalCost -= min;
modifiedGroup = grp.Where(c => !c.Cost.Equals(min)).ToList();
i += 1;
} while (i < groups);
}
});
return(appliedDiscount);
}
public List <AppliedDiscount> DiscountsApplicable(List <ProductQuantity> productList)
{
var discountsApplied = new List <AppliedDiscount>();
foreach (var item in productList)
{
if (item.Product.Id == _discountedProduct.Id)
{
var discount = CalculateDiscount(item);
var appliedDiscount = new AppliedDiscount
{
Type = DiscountType.Percentage,
Description = $"{item.Product.Name} {_percentage:P0} OFF: - {discount.ToCurrencyString()}",
Amount = discount
};
discountsApplied.Add(appliedDiscount);
}
}
return(discountsApplied);
}
public AppliedDiscount CalculateMixedDiscount(IEnumerable <ParcelOrderOutputItem> items)
{
var appliedDiscount = new AppliedDiscount
{
TotalCost = items.Select(i => i.Cost).Sum()
};
var discountRule = (_configuredDiscounts.Where(t => t.DiscountTypes.Equals(DiscountTypes.Mixed))).SingleOrDefault();
if (discountRule == null)
{
throw new NotSupportedException("Discount Ruleset not supported.");
}
var totalCounts = items.Count();
var groups = Math.Abs(totalCounts / discountRule.Limit);
if (groups <= 0)
{
return(appliedDiscount);
}
var i = 0;
var modifiedGroup = items;
do
{
var min = modifiedGroup.Select(m => m.Cost).Min();
appliedDiscount.SavedCost += min;
appliedDiscount.TotalCost -= min;
modifiedGroup = modifiedGroup.Where(c => !c.Cost.Equals(min)).ToList();
i += 1;
} while (i < groups);
return(appliedDiscount);
}
public IEnumerable <AppliedDiscount> DiscountsApplicable(IEnumerable <ProductQuantity> items)
{
var itemArray = items as ProductQuantity[] ?? items.ToArray();
var discountsApplied = new List <AppliedDiscount>();
foreach (var item in itemArray)
{
if (item.Product.ProductId == _discountedItem.ProductId)
{
var discount = CalculateDiscount(item);
var appliedDiscount = new AppliedDiscount
{
Type = DiscountType.Percentage,
Text = $"{item.Product.Name} {_percentage:P0} OFF: - {discount.ToCurrencyString()}",
Amount = discount
};
discountsApplied.Add(appliedDiscount);
}
}
return(discountsApplied);
}
