private static PaymentInformation CalculateTenpaiPayment(Board board)
{
var scoreChanges = new int[4];
var tenhouTenpai = board.Seats.Select(s => TenhouShanten.IsTenpai(s.Hand, s.ConcealedTiles, s.Melds.Count)).ToList();
var tenpaiCount = tenhouTenpai.Count(s => s);
if (tenpaiCount == 4)
{
return(new PaymentInformation(0, 0, scoreChanges, Yaku.None));
}
for (var i = 0; i < 4; i++)
{
if (tenhouTenpai[i])
{
scoreChanges[i] = 3000 / tenpaiCount;
}
else
{
scoreChanges[i] = -3000 / (4 - tenpaiCount);
}
}
return(new PaymentInformation(0, 0, scoreChanges, Yaku.None));
}
protected static bool CanRiichi(Board board)
{
var seat = board.ActiveSeat;
if (seat.DeclaredRiichi || board.Wall.RemainingDraws < 4 || seat.Melds.Any(m => m.MeldType != MeldType.ClosedKan))
{
return(false);
}
return(TenhouShanten.IsTenpai(seat.Hand, seat.ConcealedTiles, seat.Melds.Count));
}
public override void Update(Board board, Wall wall)
{
if (board.Seats.Any(s => s.Score < 0))
{
_nextState = new Owari();
return;
}
var oorasu = board.RoundWind == TileType.Nan && board.Seats[3].IsOya;
if ((oorasu || board.RoundWind == TileType.Shaa) && board.Seats.Any(s => s.Score >= 30000))
{
_nextState = new Owari();
return;
}
var oyaWin = _winningSeatIndexes.Any(i => board.Seats[i].IsOya);
var oyaTenpai = TenhouShanten.IsTenpai(board.Oya.Hand, board.Oya.ConcealedTiles, board.Oya.Melds.Count);
var oyaHighestScore = board.Oya.Score > board.Seats.Where(s => !s.IsOya).Max(s => s.Score);
if (oyaWin || oyaTenpai)
{
if (oorasu && oyaHighestScore && board.Oya.Score >= 30000)
{
_nextState = new Owari();
return;
}
board.Honba += 1;
_nextState = new InitGame();
return;
}
if (!_winningSeatIndexes.Any())
{
RotateWinds(board);
}
else
{
board.Honba = 0;
RotateWinds(board);
}
if (board.RoundWind == TileType.Pei)
{
_nextState = new Owari();
return;
}
_nextState = new InitGame();
}