/// <summary>
/// Übernahme des Einwurfs in das Münzdepot.
/// Rückgabe des Retourgeldes aus der Kasse. Staffelung des Retourgeldes
/// hängt vom Inhalt der Kasse ab.
/// </summary>
/// <param name="coins">Aktueller Zustand des Münzdepots</param>
public void FinishPayment(IEnumerable <Coin> coins)
{
foreach (var v in ThrownInCoinValues
.Split(";")
.Select(s => Convert.ToInt32(s))
.GroupBy(s => s))
{
coins
.First(c => c.CoinValue == v.Key)
.Amount += v.Count();
}
coins = coins.OrderByDescending(c => c.CoinValue);
int sum = ThrownInCents - Product.PriceInCents;
foreach (Coin c in coins)
{
for (int i = 0; i < c.Amount && sum != 0; i++)
{
if (c.CoinValue <= sum)
{
ReturnCoinValues += c.CoinValue + ";";
sum -= c.CoinValue;
c.Amount--;
}
}
}
if (ReturnCoinValues != null)
{
ReturnCoinValues = ReturnCoinValues.Substring(0, ReturnCoinValues.Length - 1);
}
else
{
ReturnCoinValues = "0";
}
}
