public DrawResponse OnDraw(VisibleBoard board, Tile tile, DrawActions suggestedActions)
{
if (suggestedActions.HasFlag(DrawActions.Tsumo))
{
return(DrawResponse.Tsumo());
}
if (suggestedActions.HasFlag(DrawActions.Riichi))
{
var tileTypeId = board.Watashi.Hand.GetHighestUkeIreDiscard();
var discard = board.Watashi.ConcealedTiles.First(i => i.TileType.TileTypeId == tileTypeId);
return(DrawResponse.Riichi(discard));
}
if (suggestedActions.HasFlag(DrawActions.KyuushuKyuuhai) && (board.Watashi.Hand.Shanten > 2 || board.Seats.Any(s => s.DeclaredRiichi)))
{
return(DrawResponse.KyuushuKyuuhai());
}
{
var tileTypeId = board.Watashi.Hand.GetHighestUkeIreDiscard();
// Prefer tsumogiri
if (tile.TileType.TileTypeId == tileTypeId)
{
return(DrawResponse.Discard(tile));
}
var discard = board.Watashi.ConcealedTiles.First(i => i.TileType.TileTypeId == tileTypeId);
return(DrawResponse.Discard(discard));
}
}
internal override bool CanExecute(VisibleBoard board, DrawActions possibleActions)
{
return(possibleActions.HasFlag(DrawActions.Kan) &&
!board.Watashi.DeclaredRiichi &&
HasTile(board, _tile) &&
board.Watashi.Melds.Any(m => m.MeldType == MeldType.Koutsu && m.LowestTile.TileType == _tile.TileType));
}
internal override bool CanExecute(VisibleBoard board, DrawActions possibleActions)
{
if (!possibleActions.HasFlag(DrawActions.Kan) || board.Watashi.ConcealedTiles.Count(t => t.TileType == _tileType) != 4 || board.Watashi.CurrentDraw == null)
{
return(false);
}
return(!board.Watashi.DeclaredRiichi || !board.Watashi.Hand.IsUkeIreChangedByAnkan(board.Watashi.CurrentDraw.TileType, _tileType));
}
internal override bool CanExecute(VisibleBoard board, DrawActions possibleActions)
{
return(possibleActions.HasFlag(DrawActions.KyuushuKyuuhai));
}
internal override bool CanExecute(VisibleBoard board, DrawActions possibleActions)
{
return(possibleActions.HasFlag(DrawActions.Riichi) &&
HasTile(board, _tile) &&
board.Watashi.Hand.ShantenAfterDiscard(_tile.TileType) == 0);
}