/// <summary>
/// Compares the specified hand to determine if it is of the same type as this comparer.
/// </summary>
/// <param name="hand">The hand to be compared.</param>
/// <returns>
/// a tuple specifying information about the comparison.
/// <para>The first value returns the type of this comparer if the specified hand matches, otherwise it returns <see cref="Hands.HighCard"/>.</para>
/// <para>The second value indicates the high card of the hand if there was a match, otherwise it returns <see cref="Rank.Two"/>.</para>
/// </returns>
public Tuple<Hands, Rank> Compare(IHand hand)
{
Argument.IsNotNull(() => hand);
if (hand.Count < 5)
return Tuple.Create<Hands, Rank>(0, 0);
var suit = hand[0].Suit;
if (hand.Cast<Card>().Any(card => suit != card.Suit))
{
// Found a different suit, not a flush.
return Tuple.Create<Hands, Rank>(0, 0);
}
// High card will be the first card, since the hand is already sorted by rank.
return Tuple.Create(Hands.Flush, hand[0].Rank);
}
