public override bool IsValid()
{
if (Cards.Count < Length)
{
return(false);
}
Card firstNonWildCard = Cards.FirstOrDefault(card => card.CardType != CardType.Wild);
if (firstNonWildCard == null)
{
return(true);
}
else
{
CardType expectedCardType = firstNonWildCard.CardType;
CardType originalExpectedCardType = firstNonWildCard.CardType;
CardType minCardType = CardType.One;
foreach (Card card in Cards)
{
if (expectedCardType == CardType.Wild)
{
//We've gone too far
return(false);
}
else if (card.CardType != CardType.Wild && card.CardType != expectedCardType)
{
return(false);
}
else
{
minCardType = minCardType.Next();
if (card.CardType == CardType.Wild)
{
if (expectedCardType != originalExpectedCardType)
{
expectedCardType = expectedCardType.Next();
}
continue;
}
else
{
// card type is the expected card type
expectedCardType = expectedCardType.Next();
if (minCardType > expectedCardType)
{
return(false);
}
}
}
}
}
return(true);
}
