public void CannotAffordCard_if_wrong_coins()
{
var card = new Card(1, 0, new Pool(0, 1, 2, 0, 0, 0), TokenColour.Black);
var budget = new Pool(0, 1, 1, 0, 0, 1);
var player = new Player("").Clone(withPurse: budget);
Assert.False(BuyCard.CanAffordCard(player, card));
}
public void CanAffordCard_uses_gold()
{
// Costs 1 white, 2 blue.
var card = new Card(1, 0, new Pool(0, 1, 2, 0, 0, 0), TokenColour.Black);
var budget = new Pool(1, 1, 1, 0, 0, 0);
var player = new Player("").Clone(withPurse: budget);
Assert.True(BuyCard.CanAffordCard(player, card));
}
private char GetBuyIndicator(Card card, Player player)
{
if (card == null)
{
return(' ');
}
// '*' can afford
// '·' can almost afford
// ' ' simply cannot afford
var buyIndicator = BuyCard.CanAffordCard(player, card)
? '*'
: player.Budget.DeficitFor(card.Cost).Sum <= 3 ? '·' : ' ';
return(buyIndicator);
}
public IAction ChooseAction(GameState gameState)
{
var me = gameState.CurrentPlayer;
bool CanBuy(Card card) => BuyCard.CanAffordCard(me, card);
var allFaceUpCards = gameState.Tiers
.SelectMany(t => t.ColumnSlots)
.Select(s => s.Value)
.Where(card => card != null) // If a stack runs out of cards, a slot will be null
.ToArray();
// First, if I can buy a card that gives victory points, I always do.
foreach (var card in allFaceUpCards.Concat(me.ReservedCards)
.Where(c => c.VictoryPoints > 0)
.OrderByDescending(c => c.VictoryPoints)
.Where(CanBuy))
{
var payment = BuyCard.CreateDefaultPaymentOrNull(me, card);
return(new BuyCard(card, payment));
}
// I look at all the cards I can see and choose one that looks the best in terms of accessibility
var bestCardStudy = AnalyseCards(me, allFaceUpCards.Concat(me.ReservedCards), gameState)
.OrderBy(s => s.DifficultyRating)
.FirstOrDefault();
// Second, if the most accessible card is purchasable, I buy it.
if (CanBuy(bestCardStudy.Card))
{
return(new BuyCard(bestCardStudy.Card, BuyCard.CreateDefaultPaymentOrNull(me, bestCardStudy.Card)));
}
// Third, I try and get rid of reserved cards.
foreach (var card in me.ReservedCards.Where(CanBuy))
{
return(new BuyCard(card, BuyCard.CreateDefaultPaymentOrNull(me, card)));
}
// Fourth, I check if I've got loads of coins and if so, I buy any card I can afford
if (me.Purse.Sum > 8)
{
foreach (var card in allFaceUpCards.Where(CanBuy))
{
var payment = BuyCard.CreateDefaultPaymentOrNull(me, card);
return(new BuyCard(card, payment));
}
}
// Fifth, I top up my coins, favouring colours needed by the most accessible card.
var coloursAvailable = gameState.Bank.Colours(includeGold: false).ToList();
var coinsCountICanTake = Math.Min(Math.Min(10 - me.Purse.Sum, 3), coloursAvailable.Count);
if (coinsCountICanTake > 0)
{
if (bestCardStudy != null)
{
var coloursNeeded = bestCardStudy.Deficit.Colours().ToArray();
coloursAvailable = coloursAvailable.OrderByDescending(col => coloursNeeded.Contains(col)).ToList();
}
else
{
coloursAvailable.Shuffle();
}
var transaction = new Pool();
if (bestCardStudy.Deficit.Colours().Any(col => bestCardStudy.Deficit[col] >= 2) && coinsCountICanTake > 1)
{
var neededColour = bestCardStudy.Deficit.Colours().First(col => bestCardStudy.Deficit[col] >= 2);
if (gameState.Bank[neededColour] > 3)
{
transaction[neededColour] = 2;
return(new TakeTokens(transaction));
}
}
foreach (var colour in coloursAvailable.Take(coinsCountICanTake))
{
transaction[colour] = 1;
}
return(new TakeTokens(transaction));
}
// Sixth, if it comes to it, I just reserve the best looking card I can see.
if (!me.ReservedCards.Contains(bestCardStudy.Card) && me.ReservedCards.Count < 3)
{
return(new ReserveCard(bestCardStudy.Card));
}
// Seventh, If I've already reserved the best looking card, I take a gamble.
var action = ChooseRandomCardOrNull(gameState);
if (action != null)
{
return(action);
}
// Lastly, if I think I can't do anything at all I just pass the turn.
return(new NoAction());
}
public IAction ChooseAction(GameState gameState)
{
/* PRE-CALCULATIONS */
var me = gameState.CurrentPlayer;
var otherPlayers = gameState.Players.Where(p => p != me);
bool CanBuy(Card card) => BuyCard.CanAffordCard(me, card);
var allFaceUpCards = gameState.Tiers.SelectMany(t => t.ColumnSlots)
.Select(s => s.Value)
.Where(card => card != null)
.ToArray();
var faceUpAndMyReserved = allFaceUpCards.Concat(me.ReservedCards).ToArray();
var cardsICanBuy = faceUpAndMyReserved.Where(CanBuy).ToArray();
var myOrderedCardStudy = AnalyseCards(me, faceUpAndMyReserved, gameState)
.OrderBy(s => s.Repulsion).ToArray();
var myTargetCard = myOrderedCardStudy.FirstOrDefault();
/* BEHAVIOUR */
// Check to see if a player can win (including me)
if (_options.IsThieving)
{
foreach (var player in gameState.Players.OrderByDescending(p => p == me))
{
var score = player.VictoryPoints;
var nobleDangerMap = new List <TokenColour>();
foreach (var noble in gameState.Nobles)
{
var deficit = player.Bonuses.DeficitFor(noble.Cost);
if (deficit.Sum != 1)
{
continue;
}
nobleDangerMap.Add(deficit.Colours().Single());
}
if (score < 10 && !nobleDangerMap.Any())
{
continue;
}
var winCards = allFaceUpCards.Where(c => c.VictoryPoints + score + (nobleDangerMap.Contains(c.BonusGiven) ? 3 : 0) >= 15)
.Where(c => BuyCard.CanAffordCard(player, c))
.OrderByDescending(c => c.VictoryPoints + (nobleDangerMap.Contains(c.BonusGiven) ? 3 : 0))
.ToArray();
if (winCards.Length == 0)
{
continue;
}
if (player != me && winCards.Length > 1)
{
break; // We're screwed if he has more than one winning move.
}
var winningCard = winCards.First();
if (cardsICanBuy.Contains(winningCard))
{
return(new BuyCard(winningCard, BuyCard.CreateDefaultPaymentOrNull(me, winningCard)));
}
if (player != me && me.ReservedCards.Count < 3)
{
return(new ReserveCard(winningCard));
}
}
}
// If the second best card isn't very appealing, then check to see if I should reserve the first.
if (_options.IsVeryTheiving && myOrderedCardStudy.Length > 1)
{
var second = myOrderedCardStudy.Skip(1).First();
var firstIsAmazing = myTargetCard.Repulsion < -5m;
var sedcondIsntAmazing = second.Repulsion > -5m;
var otherPlayerCanBuy = otherPlayers.Any(p => BuyCard.CanAffordCard(p, myTargetCard.Card));
var iCanAffordIfReserve = myTargetCard.DeficitWithGold == 1;
if (firstIsAmazing &&
sedcondIsntAmazing &&
otherPlayerCanBuy &&
iCanAffordIfReserve &&
me.ReservedCards.Count < 3 &&
!me.ReservedCards.Contains(myTargetCard.Card))
{
return(new ReserveCard(myTargetCard.Card));
}
}
// Buy favourite card if possible
if (myTargetCard?.DeficitWithGold == 0)
{
return(new BuyCard(myTargetCard.Card, BuyCard.CreateDefaultPaymentOrNull(me, myTargetCard.Card)));
}
// If I have 9 or more coins, or there aren't many coins left to take, buy any reasonable card I can at all
if (me.Purse.Sum > 8 || gameState.Bank.Colours(includeGold: false).Count() < 3)
{
foreach (var study in myOrderedCardStudy.Where(s => s.DeficitWithGold == 0))
{
var payment = BuyCard.CreateDefaultPaymentOrNull(me, study.Card);
return(new BuyCard(study.Card, payment));
}
}
/* more precalc */
CardFeasibilityStudy myNextTargetCard = null;
if (_options.LooksAhead && myTargetCard != null)
{
var nextCards = me.CardsInPlay.ToList();
nextCards.Add(myTargetCard.Card);
var nextMe = me with {
CardsInPlay = nextCards
};
myNextTargetCard = AnalyseCards(nextMe, faceUpAndMyReserved.Except(new[] { myTargetCard.Card }).ToArray(), gameState)
.OrderBy(s => s.Repulsion)
.FirstOrDefault();
}
// Take some coins - but if there are coins to return then favour reserving a card
var takeTokens = GetTakeTokens(gameState, myTargetCard, myNextTargetCard);
if (takeTokens != null && !takeTokens.TokensToReturn.Colours().Any())
{
return(takeTokens);
}
// Do a reserve
if (myTargetCard != null && !me.ReservedCards.Contains(myTargetCard.Card) && me.ReservedCards.Count < 3)
{
return(new ReserveCard(myTargetCard.Card));
}
// Do a random reserve if not maxxed out.
var action = ChooseRandomCardOrNull(gameState);
if (action != null && _options.RandomReserves)
{
return(action);
}
// do the give/take coins if possible
return(takeTokens ?? (IAction) new NoAction());
}
private IAction GetActionFromInput(string input, GameState state)
{
var i = input.ToLowerInvariant().Trim();
if (i.StartsWith("h"))
{
Console.WriteLine("Commands: refer to cards buy their tier and index, e.g. '1-2' for tier 1, 2nd card.");
Console.WriteLine(" t: take tokens, e.g. 't ugb' for take blUe, Green, Black.");
Console.WriteLine(" b: buy card. e.g. 'b 1-2', or 'b res' to buy a reserved card (choice made for you).");
Console.WriteLine(" r: reserve card. e.g. 'r 1-2', or just 'r 1' to reserve a random face down card from tier 1.");
Console.WriteLine("Instruments:");
Console.WriteLine(" *: you can afford this card.");
Console.WriteLine(" ·: you can almost afford this card.");
return(null);
}
if (i.StartsWith("t"))
{
var whiteSpace = i.IndexOf(' ');
var codes = i.Substring(whiteSpace);
var tokens = TokenPoolFromInput(codes);
IPool tokensToReturn = new Pool();
var commaIndex = codes.IndexOf(',');
if (commaIndex != -1)
{
tokensToReturn = TokenPoolFromInput(codes.Substring(commaIndex + 1));
}
return(new TakeTokens(tokens, tokensToReturn));
}
;
if (i.StartsWith("b"))
{
var whiteSpace = i.IndexOf(' ');
var args = i.Substring(whiteSpace).Trim();
if (args.StartsWith("res"))
{
var resCard = state.CurrentPlayer.ReservedCards.OrderByDescending(c => c.VictoryPoints).FirstOrDefault(c => BuyCard.CanAffordCard(state.CurrentPlayer, c));
if (resCard == null)
{
throw new ArgumentException("You can't afford any of your reserved cards.");
}
var resPayment = BuyCard.CreateDefaultPaymentOrNull(state.CurrentPlayer, resCard);
if (resPayment == null)
{
throw new ArgumentException("You cannot afford this card or did not specify sufficient payment.");
}
return(new BuyCard(resCard, resPayment));
}
if (args[1] != '-')
{
throw new ArgumentException($"Syntax error. Usage: 'b 1-2' for buying the second card in tier one.");
}
var tier = int.Parse(args[0].ToString());
var cardIndex = int.Parse(args[2].ToString());
var card = state.Tiers.Single(t => t.Tier == tier).ColumnSlots[cardIndex];
if (card == null)
{
throw new ArgumentException("There's no card in that slot. The tier {tier} deck has been exhasted.");
}
var payment = args.Length > 3 ? TokenPoolFromInput(args.Substring(3)) : BuyCard.CreateDefaultPaymentOrNull(state.CurrentPlayer, card);
if (payment == null)
{
throw new ArgumentException("You cannot afford this card or did not specify sufficient payment.");
}
return(new BuyCard(card, payment));
}
if (i.StartsWith("r"))
{
var whiteSpace = i.IndexOf(' ');
var args = i.Substring(whiteSpace).Trim();
var tier = int.Parse(args[0].ToString());
IPool tokensToReturn = new Pool();
var commaIndex = args.IndexOf(',');
if (commaIndex != -1)
{
tokensToReturn = TokenPoolFromInput(args.Substring(commaIndex + 1));
}
var colourToReturn = tokensToReturn.Colours().Cast <TokenColour?>().SingleOrDefault();
if (args.Length == 1)
{
return(new ReserveFaceDownCard(tier, colourToReturn));
}
if (args[1] != '-')
{
throw new ArgumentException($"Syntax error. Usage: 'r 1-2' for reserving the second card in tier one.");
}
var cardIndex = int.Parse(args[2].ToString());
var card = state.Tiers.Single(t => t.Tier == tier).ColumnSlots[cardIndex];
return(new ReserveCard(card, colourToReturn));
}
throw new NotImplementedException("Don't know that one.");
}