/// <summary>
/// Initializes each card in an array of cards. Each card will be different
/// </summary>
/// <param name="cards">Array of cards to initialize. Will result in 52 different cards</param>
/// <param name="cardCounter">The index in the array to initialize</param>
private void InitilializeEachCard(ICard[] cards, int cardCounter)
{
for (int i = 0; i < 13; i++)
{
for (int j = 0; j < 4; j++)
{
switch (j)
{
case 0:
cards[cardCounter] = new Card(i, 'S');
break;
case 1:
cards[cardCounter] = new Card(i, 'H');
break;
case 2:
cards[cardCounter] = new Card(i, 'D');
break;
case 3:
cards[cardCounter] = new Card(i, 'C');
break;
}
cardCounter += 1;
}
}
}
/// <summary>
/// A method that does calculations and decides what is the strength of the hand that a single player has
/// </summary>
/// <param name="participantVisibleHand">The hand of cards for a single player
/// implementing the IHand interface</param>
public static void GetCurrentStrengthOfCards(IHand participantVisibleHand)
{
IList<ICard> cards = participantVisibleHand.CurrentCards;
if (!cards.Any())
{
return;
}
// ---------------------------------------------------------
// check for straight, flush, straight flush and royal flush
cards = cards.OrderBy(c => c.Rank).ToList();
IDictionary<int, IList<int>> sequentialCards = new Dictionary<int, IList<int>>();
int spades = 0;
int diamonds = 0;
int clubs = 0;
int hearts = 0;
ICard highestInSequenceWithoutPairs = new Card(0, 'S');
HandStrengthEnum strengthWithoutPairs = HandStrengthEnum.HighCard;
for (int i = 0; i < cards.Count; i++)
{
sequentialCards.Add(i, new List<int>());
for (int j = i; j < cards.Count - 1; j++)
{
if (j != cards.Count - 2)
{
if (cards[j].Rank + 1 == cards[j + 1].Rank)
{
sequentialCards[i].Add(cards[j].Rank);
}
else
{
sequentialCards[i].Add(cards[j].Rank);
break;
}
}
else
{
if (cards[j].Rank + 1 == cards[j + 1].Rank)
{
sequentialCards[i].Add(cards[j].Rank);
sequentialCards[i].Add(cards[j + 1].Rank);
}
else if (j != 0 && cards[j].Rank - 1 == cards[j - 1].Rank)
{
sequentialCards[i].Add(cards[j].Rank);
break;
}
}
}
}
int highestSequenceOfRanksDetected = 0;
for (int i = 0; i < sequentialCards.Keys.Count; i++)
{
if (sequentialCards[i].Count >= highestSequenceOfRanksDetected
&& sequentialCards[i].Count > 0)
{
highestSequenceOfRanksDetected = sequentialCards[i].Count;
highestInSequenceWithoutPairs = new Card(sequentialCards[i].Max(), 'S');
}
}
for (int i = 0; i < cards.Count; i++)
{
switch (cards[i].Suit)
{
case 'S':
spades += 1;
break;
case 'D':
diamonds += 1;
break;
case 'C':
clubs += 1;
break;
case 'H':
hearts += 1;
break;
}
}
int maximumSameSuitCards = Math.Max(
Math.Max(diamonds, spades),
Math.Max(hearts, clubs));
// royal flush check -> if not check straight flush -> if not check flush -> if not check straight
if (highestSequenceOfRanksDetected >= 5 && maximumSameSuitCards >= 5)
{
if (highestInSequenceWithoutPairs.Rank == 12)
{
strengthWithoutPairs = HandStrengthEnum.RoyalFlush;
}
else
{
strengthWithoutPairs = HandStrengthEnum.StraightFlush;
}
}
else if (maximumSameSuitCards >= 5)
{
strengthWithoutPairs = HandStrengthEnum.Flush;
}
else if (highestSequenceOfRanksDetected >= 5)
{
strengthWithoutPairs = HandStrengthEnum.Straight;
}
// ----------------------------------------------------------
// begin search for pairs, two pairs, three of a kind, full house, four of a kind
IList<ICard> differentCards = new List<ICard>();
foreach (var card in cards)
{
if (differentCards.Any(c => c.Rank == card.Rank))
{
continue;
}
differentCards.Add(card);
}
HandStrengthEnum strengthPairs = HandStrengthEnum.HighCard;
ICard highestCardPairs = new Card(0, 'S');
// Check for pair, two pair, three of a kind, full house or four of a kind
for (int i = 0; i < differentCards.Count; i++)
{
int pairedCardsCounter = cards.Count(card => card.Rank == differentCards[i].Rank);
if (pairedCardsCounter > 1)
{
// four of a kind check
if (pairedCardsCounter == 4)
{
strengthPairs = HandStrengthEnum.FourOfAKind;
highestCardPairs = differentCards[i];
break;
}
// check full house -> if not check two pair -> if not results in simple pair
if (pairedCardsCounter == 3
&& (strengthPairs == HandStrengthEnum.Pair
|| strengthPairs == HandStrengthEnum.TwoPair)
&& strengthPairs < HandStrengthEnum.FourOfAKind)
{
strengthPairs = HandStrengthEnum.FullHouse;
highestCardPairs = differentCards[i];
}
else if (pairedCardsCounter == 3 && (int)strengthPairs < pairedCardsCounter)
{
strengthPairs = HandStrengthEnum.ThreeOfAKind;
highestCardPairs = differentCards[i];
}
else if (pairedCardsCounter == 2
&& strengthPairs == HandStrengthEnum.ThreeOfAKind
&& strengthPairs < HandStrengthEnum.FourOfAKind)
{
strengthPairs = HandStrengthEnum.FullHouse;
}
else if (strengthPairs == HandStrengthEnum.Pair)
{
strengthPairs = HandStrengthEnum.TwoPair;
if (highestCardPairs.Rank < differentCards[i].Rank)
{
highestCardPairs = differentCards[i];
}
}
else if (strengthPairs < HandStrengthEnum.Pair)
{
strengthPairs = HandStrengthEnum.Pair;
highestCardPairs = differentCards[i];
}
}
}
if (strengthPairs > strengthWithoutPairs)
{
participantVisibleHand.Strength = strengthPairs;
participantVisibleHand.HighCard = highestCardPairs;
}
else if (strengthWithoutPairs > strengthPairs)
{
participantVisibleHand.Strength = strengthWithoutPairs;
participantVisibleHand.HighCard = highestInSequenceWithoutPairs;
}
else
{
participantVisibleHand.Strength = HandStrengthEnum.HighCard;
if (participantVisibleHand.CurrentCards[0].Rank >= participantVisibleHand.CurrentCards[1].Rank)
{
participantVisibleHand.HighCard = participantVisibleHand.CurrentCards[0];
}
else
{
participantVisibleHand.HighCard = participantVisibleHand.CurrentCards[1];
}
}
}