static HandCalculatorTests()
{
var loadStatics = new HandCalculator();
loadStatics.Init(Enumerable.Range(0, 13).Select(TileType.FromTileTypeId));
Console.WriteLine(loadStatics.Shanten);
}
public static bool IsTenpai(IHandAnalysis hand, IReadOnlyList <Tile> concealedTiles, int meldCount)
{
if (hand.Shanten <= 0)
{
return(true);
}
if (meldCount == 0)
{
return(false);
}
var usedTileTypeIds = new bool[34];
var initialTiles = new Stack <TileType>();
foreach (var tile in concealedTiles)
{
usedTileTypeIds[tile.TileType.TileTypeId] = true;
initialTiles.Push(tile.TileType);
}
TileType?draw = null;
if (initialTiles.Count % 3 == 2)
{
draw = initialTiles.Pop();
}
var remainingMelds = meldCount;
var toPon = new List <TileType>();
for (var i = 27; i < 34 && remainingMelds > 0; i++)
{
if (usedTileTypeIds[i])
{
continue;
}
remainingMelds -= 1;
var tileType = TileType.FromTileTypeId(i);
initialTiles.Push(tileType);
initialTiles.Push(tileType);
initialTiles.Push(tileType);
toPon.Add(tileType);
}
if (remainingMelds > 0)
{
return(false);
}
var tempHand = new HandCalculator();
tempHand.Init(initialTiles);
foreach (var tileType in toPon)
{
tempHand.Pon(tileType);
tempHand.Discard(tileType);
}
if (draw != null)
{
tempHand.Draw(draw);
}
return(tempHand.Shanten <= 0);
}
