/// <summary>
/// Run through all purchasing that takes place.
/// </summary>
public void BuyPhase()
{
// go through each pop in order of priority
foreach (var buyer in Populous.PopsByPriority)
{
// go through their list of needs
foreach (var needPair in buyer.TotalNeeds)
{
// Check that there is stuff that the pop
// can trade for goods
if (buyer.ForSale.All(x => x.Item2 <= 0))
{
break; // if they don't they stop
}
// get the product and amount
var need = needPair.Item1;
var desired = needPair.Item2; // the units desired
try
{
// Check if the product is available to buy
if (ProductSupply.GetProductValue(need) <= 0)
{
// if nothing is available, add it to the shortfall.
Shortfall.AddProducts(need, desired);
continue; // and go to the next need
}
}
catch (KeyNotFoundException) // If it doesn't exist in the supply at all.
{
// Add it in at 0
ProductSupply.IncludeProduct(need);
// Subtract the missing product from shortfall.
Shortfall.AddProducts(need, desired);
continue; // and skip it here.
}
// Go to the market and buy what we can.
var reciept = BuyGoodsFromMarket(buyer, need, desired);
// process our reciept, getting how satisfied our need was.
var satisfaction = reciept.GetProductValue(need);
// Add satisfaction to our purchased good recorder
_purchasedGoods.AddProducts(need, satisfaction);
// Remove bought good from supply
ProductSupply.SubtractProducts(need, satisfaction);
// get the number of goods that couldn't be bought.
var shortfall = desired - satisfaction;
// add that to shortfall
Shortfall.AddProducts(need, shortfall);
}
}
// with all buying done, get surplus supply available by removing bought goods.
_surplus.AddProducts(PurchasedGoods.Multiply(-1));
}
