private PurchaseResult(PurchaseOptimizer <Resource, Self, Other> optimizer, Self simSelf, Other simOther, Resource[] bannedPurchases)
{
this.optimizer = optimizer;
purchases = new List <Resource>();
var ledger = new PurchaseOperationResult <Resource>();
ledger.utilityGained = 0;
ledger.exchages = new List <ExchangeResult <Resource> >();
int iterations = 0;
//drain the bank
for (
var resource = optimizer.GetHighestPurchaseableUtilityPerCost(simSelf, simOther, bannedPurchases);
!EqualityComparer <Resource> .Default.Equals(resource, default);
resource = optimizer.GetHighestPurchaseableUtilityPerCost(simSelf, simOther, bannedPurchases))
{
var purchaseResult = optimizer.exchange.Purchase(resource, optimizer.increment, simSelf, simOther);
ledger.utilityGained += optimizer.utilityFunctions.GetIncrementalUtility(
resource,
simSelf,
purchaseResult.info.amount);
purchaseResult.Execute();
ledger.exchages.Add(purchaseResult.info);
purchases.Add(resource);
iterations++;
if (iterations > 1000)
{
throw new Exception("Attempted to purchase over too many iterations, broke to safegaurd against infinite loop");
}
}
this.ledger = ledger;
}
/// <summary>
/// Buy and sell items until the bank is empty; maximizing utility
/// </summary>
/// <param name="bank">the amount of money which can be spent</param>
/// <returns>the amount of utility gained during purchase</returns>
public static PurchaseResult Purchase(PurchaseOptimizer <Resource, Self, Other> optimizer, Self simSelf, Other simOther, Resource[] bannedPurchases = null)
{
if (bannedPurchases == null)
{
bannedPurchases = new Resource[0];
}
return(new PurchaseResult(optimizer, simSelf, simOther, bannedPurchases));
}