public WithdrawCassette(BanknoteFaceValue faceValue, int capacity, int banknotesQuantity)
{
if (capacity <= 0)
{
throw new ArgumentException("Ёмкость кассеты не может быть пустой");
}
if (banknotesQuantity <= 0)
{
throw new ArgumentException("Кассета не может быть пустой");
}
if (banknotesQuantity > capacity)
{
throw new ArgumentException($"Число банкнот в кассете не может превышать {capacity}");
}
this.faceValue = faceValue;
this.capacity = capacity;
BanknotesQuantity = banknotesQuantity;
}
private WithdrawCassette GetWithdrawCassetteByFaceValue(BanknoteFaceValue faceValue)
{
return(withdrawCassettes.Where(c => c.faceValue.Equals(faceValue)).First());
}
public Dictionary <BanknoteFaceValue, int> GetAvailableBanknotes(int withdrawalAmount, BanknoteFaceValue desiredFaceValue)
{
Dictionary <BanknoteFaceValue, int> banknotes = new Dictionary <BanknoteFaceValue, int>();
BanknoteFaceValue[] faceValues = (BanknoteFaceValue[])Enum.GetValues(typeof(BanknoteFaceValue));
Array.Reverse(faceValues);
int desiredFaceValueIndex = Array.IndexOf(faceValues, desiredFaceValue);
for (int i = desiredFaceValueIndex; i < faceValues.Length; i++)
{
banknotes.Clear();
int currentWithdrawalAmount = withdrawalAmount;
for (int j = i; j < faceValues.Length; j++)
{
int banknotesQuantity = currentWithdrawalAmount / (int)faceValues[j];
int faceValueBanknotesQuantity = GetWithdrawBanknotesQuantityByFaceValue(faceValues[j]);
if (banknotesQuantity > faceValueBanknotesQuantity)
{
banknotesQuantity = faceValueBanknotesQuantity;
}
currentWithdrawalAmount -= (int)faceValues[j] * banknotesQuantity;
banknotes[faceValues[j]] = banknotesQuantity;
}
if (currentWithdrawalAmount == 0)
{
return(banknotes);
}
}
banknotes.Clear();
return(banknotes);
}
public int GetWithdrawBanknotesQuantityByFaceValue(BanknoteFaceValue faceValue)
{
return(withdrawCassettes.Where(c => c.faceValue.Equals(faceValue)).Select(c => c.BanknotesQuantity).First());
}
