private bool CanApplyFactorAcrossSpecial(int factor, TrolleySpecial special)
{
foreach (var trolleyQuantity in Quantities)
{
var specialQuantity = special.Quantities.First(x => x.Name == trolleyQuantity.Name);
if (specialQuantity.Quantity * factor > trolleyQuantity.Quantity)
{
return(false);
}
}
return(true);
}
private int FindBestFactor(List <int> factors, TrolleySpecial special)
{
var bestFactor = 1;
foreach (var factor in factors)
{
if (factor > bestFactor && CanApplyFactorAcrossSpecial(factor, special))
{
bestFactor = factor;
}
}
return(bestFactor);
}
private decimal CalculateTotalUsingSpecial(int factor, TrolleySpecial special)
{
var total = special.Total * factor;
foreach (var trolleyQuantity in Quantities)
{
var specialQuantity = special.Quantities.First(x => x.Name == trolleyQuantity.Name);
var remainingQuantity = trolleyQuantity.Quantity - specialQuantity.Quantity * factor;
if (remainingQuantity > 0)
{
var price = Products.First(x => x.Name == trolleyQuantity.Name).Price;
total += price * remainingQuantity;
}
}
return(total);
}
private int FindBestFactorForSpecial(TrolleySpecial special)
{
var factors = CalculateFactors(special);
return(FindBestFactor(factors, special));
}
