/// <summary>
/// Get the next move suggestion by Wizard's Strategy: http://wizardofodds.com/games/blackjack/basics/
/// </summary>
/// <param name="dealerHandCards">Dealer's Hand</param>
/// <param name="playerHandCards">Player's Hand</param>
/// <param name="playerHands">Current hand count the player has</param>
/// <param name="gameContext">Game Context</param>
/// <returns></returns>
public static PlayerAction GetActionByWizardStrategy(HandCards dealerHandCards, PlayerHandCards playerHandCards, int playerHands, GameContext gameContext)
{
bool isSoftValue;
int dealerValue = dealerHandCards.GetHandValue(out isSoftValue);
int playerValue = playerHandCards.GetHandValue(out isSoftValue);
if (playerValue == 16 && dealerValue == 10 && playerHandCards.EligibleToSurrender(gameContext))
{
return(PlayerAction.Surrender);
}
if (dealerValue >= 2 && dealerValue <= 6)
{
if (playerHandCards.EligibleToSplit(playerHands, gameContext))
{
if (playerValue != 8 && playerValue != 10 && playerValue != 20)
{
return(PlayerAction.Split);
}
}
if (isSoftValue)
{
if (playerValue >= 12 && playerValue <= 15)
{
return(PlayerAction.Hit);
}
else if (playerValue >= 16 && playerValue <= 18)
{
return(playerHandCards.EligibleToDouble(gameContext) ? PlayerAction.Double : (playerValue == 18 ? PlayerAction.Stand : PlayerAction.Hit));
}
else if (playerValue >= 19 && playerValue <= 21)
{
return(PlayerAction.Stand);
}
}
else
{
if (playerValue >= 4 && playerValue <= 8)
{
return(PlayerAction.Hit);
}
else if (playerValue >= 9 && playerValue <= 11)
{
return(playerHandCards.EligibleToDouble(gameContext) ? PlayerAction.Double : PlayerAction.Hit);
}
else if (playerValue >= 12 && playerValue <= 21)
{
return(PlayerAction.Stand);
}
}
}
else if (dealerValue >= 7 && dealerValue <= 11)
{
if (playerHandCards.EligibleToSplit(playerHands, gameContext))
{
if (playerValue == 16 || playerHandCards.ToString().Equals("AA"))
{
return(PlayerAction.Split);
}
}
if (isSoftValue)
{
if (playerValue >= 12 && playerValue <= 18)
{
return(PlayerAction.Hit);
}
else if (playerValue >= 19 && playerValue <= 21)
{
return(PlayerAction.Stand);
}
}
else
{
if (playerValue >= 4 && playerValue <= 16)
{
if (playerValue == 10 || playerValue == 11)
{
if (playerValue > dealerValue)
{
return(playerHandCards.EligibleToDouble(gameContext) ? PlayerAction.Double : PlayerAction.Hit);
}
}
return(PlayerAction.Hit);
}
else if (playerValue >= 12 && playerValue <= 21)
{
return(PlayerAction.Stand);
}
}
}
else
{
throw new ArgumentException(string.Format("Dealer value is invalid: {0}", dealerValue), "dealerHandCards");
}
throw new ArgumentException(string.Format("Player value is invalid: {0} IsSoftValue: {1}", playerValue, isSoftValue), "playerHandCards");
}
private static GameRecord PlayOneGame(
long gameId,
decimal initalBet,
decimal initalWinAmount,
GameContext gameContext,
Func <HandCards, PlayerHandCards, int, GameContext, PlayerAction> getPlayerAction)
{
GameRecord newGame = new GameRecord(gameId);
// Player place initial bet, game starts
decimal totalWinThisGame = 0;
newGame.AddGameStartedEvent(initalBet);
// Initial round of card dealing
PlayerHandCards playerCards = new PlayerHandCards(initalBet);
playerCards.AddCard(gameContext.GetCardWithReshuffle()); // player first card
int dealerFaceDownCard = gameContext.GetCardWithReshuffle(); // dealer first card, face-down
playerCards.AddCard(gameContext.GetCardWithReshuffle()); // player second card
HandCards dealerCards = new HandCards(gameContext.GetCardWithReshuffle()); // dealer second card, face-up
LinkedList <PlayerHandCards> playerHands = new LinkedList <PlayerHandCards>();
playerHands.AddFirst(playerCards);
newGame.AddOpenHandEvent(playerHands.Count, dealerCards, playerHands.First());
// Handle player hands until all of them either stand or be busted.
int playerId = 1;
for (LinkedListNode <PlayerHandCards> node = playerHands.First; node != null;)
{
PlayerHandCards currentHand = node.Value;
PlayerAction currentAction = getPlayerAction(dealerCards, currentHand, playerHands.Count, gameContext);
PlayerHandCards newHand = null;
switch (currentAction)
{
case PlayerAction.Double:
currentHand.BetAmount *= 2;
currentHand.AddCard(gameContext.GetCardWithReshuffle());
break;
case PlayerAction.Hit:
currentHand.AddCard(gameContext.GetCardWithReshuffle());
break;
case PlayerAction.Split:
newHand = currentHand.SplitAndGetNewHandCards(
gameContext.GetCardWithReshuffle(),
gameContext.GetCardWithReshuffle(),
gameContext);
break;
case PlayerAction.Surrender:
currentHand.HasSurrendered = true;
break;
}
newGame.AddEventByPlayerAction(currentAction, playerId, dealerCards, currentHand, gameContext);
if (newHand != null)
{
playerHands.AddLast(newHand);
newGame.AddOpenHandEvent(playerHands.Count, dealerCards, newHand);
}
// Conditions to move to next hand
LinkedListNode <PlayerHandCards> nodeToRemove;
if (currentHand.HasSurrendered)
{
decimal lostAmount = currentHand.BetAmount / 2;
totalWinThisGame -= lostAmount;
newGame.AddCloseHandEvent(playerId, dealerCards, currentHand, lostAmount, "Surrender");
nodeToRemove = node;
playerHands.Remove(nodeToRemove);
node = node.Next;
playerId++;
}
else if (currentHand.IsBusted)
{
totalWinThisGame -= currentHand.BetAmount;
newGame.AddCloseHandEvent(playerId, dealerCards, currentHand, -currentHand.BetAmount, "Busted");
nodeToRemove = node;
playerHands.Remove(nodeToRemove);
node = node.Next;
playerId++;
}
else if (currentAction == PlayerAction.Stand)
{
node = node.Next;
playerId++;
}
}
// Dealer dealing for himself until he is busted, or over 17
if (playerHands.Count > 0)
{
bool isSoftValue;
dealerCards.AddCard(dealerFaceDownCard);
string initialCards = dealerCards.ToString();
int currentValue = dealerCards.GetHandValue(out isSoftValue);
while (!dealerCards.IsBusted && !dealerCards.IsBlackJack)
{
if (currentValue >= 17)
{
if (!isSoftValue || !gameContext.DealerHitsOnSoft17)
{
break;
}
}
int newCard = gameContext.GetCardWithReshuffle();
dealerCards.AddCard(newCard);
currentValue = dealerCards.GetHandValue(out isSoftValue);
}
newGame.AddDealerEvent(initialCards, dealerCards.ToString(), currentValue);
// Check game result by comparing dealer with each player hand
playerId = 1;
for (LinkedListNode <PlayerHandCards> node = playerHands.First; node != null; node = node.Next, playerId++)
{
if (!node.Value.HasSurrendered && !node.Value.IsBusted)
{
decimal winAmount;
if (CheckGameStatus(dealerCards, node.Value, gameContext, out winAmount) != GameStatus.NotComplete)
{
totalWinThisGame += winAmount;
newGame.AddCloseHandEvent(playerId, dealerCards, node.Value, winAmount);
}
}
}
}
newGame.AddGameCompletedEvent(totalWinThisGame, initalWinAmount + totalWinThisGame);
return(newGame);
}