/// <summary>
/// Compare two estimates.
/// </summary>
/// <param name="x">First estimate.</param>
/// <param name="y">Second estimate.</param>
/// <returns>Comparison result.</returns>
internal static int Compare(DiscountDealEstimate x, DiscountDealEstimate y)
{
if (x != null && y != null)
{
return(x.MarginalDiscountAmountPerOverlappedQuantity.CompareTo(y.MarginalDiscountAmountPerOverlappedQuantity));
}
else if (y == null)
{
return(1);
}
return(-1);
}
private static DiscountDealEstimate BuildEstimates(
Dictionary <string, DiscountDealEstimate> offerIdToEstimateNonCompoundedLookupHolder,
List <DiscountBase> compoundedDiscountsHolder,
DiscountDealEstimate existingCombinedEstimatesForCompounded,
Dictionary <string, DiscountBase> discounts,
DiscountableItemGroup[] discountableItemGroups,
decimal[] remainingQuantities,
decimal[] remainingQuantitiesForCompound,
HashSet <int> itemsWithOverlappingDiscounts,
HashSet <int> itemsWithOverlappingDiscountsCompoundedOnly)
{
using (SimpleProfiler profiler = new SimpleProfiler("OverlappedDiscounts.BuildEstimates", 2))
{
DiscountDealEstimate combinedEstimateForCompounded = existingCombinedEstimatesForCompounded;
foreach (KeyValuePair <string, DiscountBase> pair in discounts)
{
DiscountBase discount = pair.Value;
DiscountDealEstimate estimate = discount.GetDiscountDealEstimate(
discountableItemGroups,
discount.CanCompound ? remainingQuantitiesForCompound : remainingQuantities,
itemsWithOverlappingDiscounts,
itemsWithOverlappingDiscountsCompoundedOnly);
if (discount.CanCompound)
{
if (combinedEstimateForCompounded == null)
{
combinedEstimateForCompounded = estimate;
}
else
{
combinedEstimateForCompounded = DiscountDealEstimate.Combine(combinedEstimateForCompounded, estimate);
}
compoundedDiscountsHolder.Add(discount);
}
else
{
offerIdToEstimateNonCompoundedLookupHolder[discount.OfferId] = estimate;
}
}
// returns combined estimate for compounded
return(combinedEstimateForCompounded);
}
}
internal static DiscountDealEstimate Combine(DiscountDealEstimate x, DiscountDealEstimate y)
{
if (!x.CanCompound || !y.CanCompound)
{
return(x);
}
Dictionary <int, decimal> combinedLookup = new Dictionary <int, decimal>(x.ItemGroupIndexToQuantityNeededFromOverlappedLookup);
foreach (KeyValuePair <int, decimal> pair in y.ItemGroupIndexToQuantityNeededFromOverlappedLookup)
{
int itemGroupIndex = pair.Key;
decimal quantity = pair.Value;
decimal existingQuantity = decimal.Zero;
// Takes the max quantity of the two.
if (combinedLookup.TryGetValue(itemGroupIndex, out existingQuantity))
{
combinedLookup[itemGroupIndex] = Math.Max(quantity, existingQuantity);
}
else
{
combinedLookup[itemGroupIndex] = quantity;
}
}
return(new DiscountDealEstimate(
true,
string.Empty,
x.TotalApplicableQuantityWithOverlapped + y.TotalApplicableQuantityWithOverlapped,
x.TotalDiscountAmountWithOverlapped + y.TotalDiscountAmountWithOverlapped,
x.TotalApplicableQuantityWithoutOverlapped + y.TotalApplicableQuantityWithoutOverlapped,
x.TotalDiscountAmountWithoutOverlapped + y.TotalDiscountAmountWithoutOverlapped,
combinedLookup));
}
internal DiscountBase[] GetSortedDiscountsToApplyInFastMode(
DiscountableItemGroup[] discountableItemGroups,
decimal[] remainingQuantities,
decimal[] remainingQuantitiesForCompound,
HashSet <int> itemsWithOverlappingDiscounts,
HashSet <int> itemsWithOverlappingDiscountsCompoundedOnly)
{
using (SimpleProfiler profiler = new SimpleProfiler("OverlappedDiscounts.GetDiscountsToApplyInFastMode", 2))
{
Dictionary <string, DiscountDealEstimate> offerIdToEstimateNonCompoundedLookup = new Dictionary <string, DiscountDealEstimate>(StringComparer.OrdinalIgnoreCase);
// Consolidate all compounded discounts into one estimate, to be sorted with the rest later.
List <DiscountBase> compoundedDiscounts = new List <DiscountBase>();
DiscountDealEstimate combinedEstimateForCompounded = null;
// Build estimates for offer discounts.
combinedEstimateForCompounded = OverlapppedDiscounts.BuildEstimates(
offerIdToEstimateNonCompoundedLookup,
compoundedDiscounts,
combinedEstimateForCompounded,
this.OfferDiscounts,
discountableItemGroups,
remainingQuantities,
remainingQuantitiesForCompound,
itemsWithOverlappingDiscounts,
itemsWithOverlappingDiscountsCompoundedOnly);
// Build estimates for mix and match and quantity discounts.
combinedEstimateForCompounded = OverlapppedDiscounts.BuildEstimates(
offerIdToEstimateNonCompoundedLookup,
compoundedDiscounts,
combinedEstimateForCompounded,
this.MixAndMatchAndQuantityDiscounts,
discountableItemGroups,
remainingQuantities,
remainingQuantitiesForCompound,
itemsWithOverlappingDiscounts,
itemsWithOverlappingDiscountsCompoundedOnly);
List <DiscountDealEstimate> estimatedSorted = new List <DiscountDealEstimate>(offerIdToEstimateNonCompoundedLookup.Values);
if (combinedEstimateForCompounded != null)
{
estimatedSorted.Add(combinedEstimateForCompounded);
}
estimatedSorted.Sort(DiscountDealEstimate.GetComparison());
#if DEBUG
foreach (DiscountDealEstimate estimate in estimatedSorted)
{
estimate.DebugDisplay();
}
#endif
DiscountBase[] discountsSorted = new DiscountBase[this.MixAndMatchAndQuantityDiscounts.Count + this.OfferDiscounts.Count];
int discountIndex = 0;
for (int i = estimatedSorted.Count - 1; i >= 0; i--)
{
DiscountDealEstimate estimate = estimatedSorted[i];
if (estimate.CanCompound)
{
for (int compoundedIndex = 0; compoundedIndex < compoundedDiscounts.Count; compoundedIndex++)
{
discountsSorted[discountIndex] = compoundedDiscounts[compoundedIndex];
discountIndex++;
}
}
else
{
DiscountBase discount = null;
if (this.MixAndMatchAndQuantityDiscounts.TryGetValue(estimate.OfferId, out discount))
{
discountsSorted[discountIndex] = discount;
discountIndex++;
}
else if (this.OfferDiscounts.TryGetValue(estimate.OfferId, out discount))
{
discountsSorted[discountIndex] = discount;
discountIndex++;
}
}
}
return(discountsSorted);
}
}
/// <summary>
/// Gets the discount deal estimate.
/// </summary>
/// <param name="discountableItemGroups">The valid sales line items on the transaction to consider.</param>
/// <param name="remainingQuantities">The remaining quantities of each of the sales lines to consider.</param>
/// <param name="itemsWithOverlappingDiscounts">Items with overlapping discounts.</param>
/// <param name="itemsWithOverlappingDiscountsCompoundedOnly">Hast set of overlapped item group indices, compounded only.</param>
/// <returns>Discount deal estimate.</returns>
protected internal override DiscountDealEstimate GetDiscountDealEstimate(
DiscountableItemGroup[] discountableItemGroups,
decimal[] remainingQuantities,
HashSet <int> itemsWithOverlappingDiscounts,
HashSet <int> itemsWithOverlappingDiscountsCompoundedOnly)
{
if (discountableItemGroups == null)
{
throw new ArgumentNullException("discountableItemGroups");
}
if (remainingQuantities == null)
{
throw new ArgumentNullException("remainingQuantities");
}
if (itemsWithOverlappingDiscounts == null)
{
throw new ArgumentNullException("itemsWithOverlappingDiscounts");
}
if (itemsWithOverlappingDiscountsCompoundedOnly == null)
{
throw new ArgumentNullException("itemsWithOverlappingDiscounts");
}
decimal totalApplicableQuantityWithOverlapped = decimal.Zero;
decimal totalDiscountAmountWithOverlapped = decimal.Zero;
decimal totalApplicableQuantityWithoutOverlapped = decimal.Zero;
decimal totalDiscountAmountWithoutOverlapped = decimal.Zero;
Dictionary <int, decimal> itemGroupIndexToQuantityNeededFromOverlappedLookup = new Dictionary <int, decimal>();
foreach (KeyValuePair <int, HashSet <decimal> > pair in this.ItemGroupIndexToDiscountLineNumberSetMap)
{
int itemGroupIndex = pair.Key;
HashSet <decimal> discountLineNumberSet = pair.Value;
decimal quantity = remainingQuantities[itemGroupIndex];
if (quantity > decimal.Zero)
{
decimal price = discountableItemGroups[itemGroupIndex].Price;
decimal unitDiscountAmount = decimal.Zero;
if (discountLineNumberSet.Any())
{
unitDiscountAmount = GetUnitDiscountAmount(this.DiscountLines[discountLineNumberSet.First()], price);
}
decimal effectiveDiscountAmount = unitDiscountAmount * quantity;
totalApplicableQuantityWithOverlapped += quantity;
totalDiscountAmountWithOverlapped += effectiveDiscountAmount;
if (this.IsItemIndexGroupOverlappedWithNonCompoundedDiscounts(itemGroupIndex, itemsWithOverlappingDiscounts, itemsWithOverlappingDiscountsCompoundedOnly))
{
itemGroupIndexToQuantityNeededFromOverlappedLookup[itemGroupIndex] = quantity;
}
else
{
totalApplicableQuantityWithoutOverlapped += quantity;
totalDiscountAmountWithoutOverlapped += effectiveDiscountAmount;
}
}
}
DiscountDealEstimate estimate = new DiscountDealEstimate(
this.CanCompound,
this.OfferId,
totalApplicableQuantityWithOverlapped,
totalDiscountAmountWithOverlapped,
totalApplicableQuantityWithoutOverlapped,
totalDiscountAmountWithoutOverlapped,
itemGroupIndexToQuantityNeededFromOverlappedLookup);
return(estimate);
}
