public DiscardResponse OnDiscard(VisibleBoard board, Tile tile, int who, DiscardActions suggestedActions)
{
if (suggestedActions.HasFlag(DiscardActions.Ron))
{
return(DiscardResponse.Ron());
}
// Call value honors if it improves shanten. But don't call if already tenpai (all discards would be furiten)
var shanten = board.Watashi.Hand.Shanten;
if (shanten > 0 && suggestedActions.HasFlag(DiscardActions.Pon) && !suggestedActions.HasFlag(DiscardActions.Kan))
{
var tileType = tile.TileType;
if (tileType.TileTypeId >= 31 || tileType == board.RoundWind || tileType == board.Watashi.SeatWind)
{
var t = board.Watashi.Hand.WithPon(tileType);
if (t.Shanten < shanten)
{
var tilesInHand = board.Watashi.ConcealedTiles.Where(i => i.TileType.TileTypeId == tileType.TileTypeId).ToList();
var tileTypeId = t.GetHighestUkeIreDiscard();
var discard = board.Watashi.ConcealedTiles.First(i => i.TileType.TileTypeId == tileTypeId);
return(DiscardResponse.Pon(tilesInHand[0], tilesInHand[1], discard));
}
}
}
return(DiscardResponse.Pass());
}
internal override bool CanExecute(VisibleBoard board, DiscardActions possibleActions)
{
if (board.CurrentDiscard == null)
{
return(false);
}
var tileType = board.CurrentDiscard.TileType;
return(possibleActions.HasFlag(DiscardActions.Pon) &&
_tile0.TileType == tileType &&
_tile1.TileType == tileType &&
_discardAfterCall.TileType != tileType && // kuikae
HasTile(board, _tile0) &&
HasTile(board, _tile1) &&
HasTile(board, _discardAfterCall));
}
internal override bool CanExecute(VisibleBoard board, DiscardActions possibleActions)
{
if (board.CurrentDiscard == null)
{
return(false);
}
var tileType = board.CurrentDiscard.TileType;
var tileTypeIds = new[] { _tile0.TileType.TileTypeId, _tile1.TileType.TileTypeId, tileType.TileTypeId }.OrderBy(x => x).ToList();
var isValidDiscardForKanchanCase = tileTypeIds[1] == tileType.TileTypeId && _discardAfterCall.TileType != tileType;
var isValidDiscard = isValidDiscardForKanchanCase || Kuikae.IsValidDiscardForNonKanchanChii(tileType, _discardAfterCall.TileType);
return(possibleActions.HasFlag(DiscardActions.Chii) &&
tileTypeIds[0] + 1 == tileTypeIds[1] &&
tileTypeIds[1] + 1 == tileTypeIds[2] &&
isValidDiscard &&
HasTile(board, _tile0) &&
HasTile(board, _tile1) &&
HasTile(board, _discardAfterCall));
}
internal override bool CanExecute(VisibleBoard board, DiscardActions possibleActions)
{
return(possibleActions.HasFlag(DiscardActions.Kan));
}