int[] StraightFlush(Card[] hand)
{
if (IsFlush(hand) && IsStraight(hand))
return new[] { 9, hand.Select(c => c.Value).Where(v => v!=ACE).Max() };
return null;
}
int[] RoyalFlush(Card[] hand)
{
if (IsFlush(hand) && IsStraight(hand) && hand.Select(c => c.Value).Max() == ACE && hand.Select(c => c.Value).Contains(KING))
return new[] {10};
return null;
}
int[] Straight(Card[] hand)
{
if (IsStraight(hand))
{
var result = new[] { 5 };
if (hand.Select(c => c.Value).Contains(ACE) && hand.Select(c => c.Value).Contains(2))
return result.Concat(new int[] {5}).ToArray();
return result.Concat(new int[] {hand.Select(c=>c.Value).Max()}).ToArray();
}
return null;
}
bool IsFlush(Card[] hand)
{
return hand.Select(c => c.Color).Distinct().Count() == 1;
}