/// <summary>
/// Computes the list of yakus available with this sequence of combinations.
/// If the list contains one or several yakumans, it can't contain any regular yakus.
/// Two <see cref="YakuPivot"/> are not computed :
/// <list type="bullet">
/// <item><see cref="KokushiMusou"/></item>
/// <item><see cref="NagashiMangan"/></item>
/// </list>
/// </summary>
/// <param name="combinationsSequence">Sequence of combinations.</param>
/// <param name="context">Context.</param>
/// <returns>List of yakus with this sequence of combinations.</returns>
/// <exception cref="ArgumentNullException"><paramref name="combinationsSequence"/> is <c>Null</c>.</exception>
/// <exception cref="ArgumentNullException"><paramref name="context"/> is <c>Null</c>.</exception>
/// <exception cref="NotImplementedException">The <see cref="YakuPivot"/> to check is not implemented.</exception>
public static List <YakuPivot> GetYakus(List <TileComboPivot> combinationsSequence, WinContextPivot context)
{
if (combinationsSequence == null)
{
throw new ArgumentNullException(nameof(combinationsSequence));
}
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var yakus = new List <YakuPivot>();
foreach (YakuPivot yaku in Yakus.Where(y => y.IsYakuman))
{
bool addYaku = false;
if (yaku == Daisangen)
{
addYaku = combinationsSequence.Count(c => c.IsBrelanOrSquare && c.Family == FamilyPivot.Dragon) == 3;
}
else if (yaku == Suuankou)
{
addYaku = combinationsSequence.Count(c => c.IsBrelanOrSquare && c.IsConcealed && (!c.Tiles.Contains(context.LatestTile) || context.DrawType.IsSelfDraw())) == 4;
}
else if (yaku == Shousuushii)
{
addYaku = combinationsSequence.Count(c => c.IsBrelanOrSquare && c.Family == FamilyPivot.Wind) == 3 &&
combinationsSequence.Any(c => c.IsPair && c.Family == FamilyPivot.Wind);
}
else if (yaku == Daisuushii)
{
addYaku = combinationsSequence.Count(c => c.IsBrelanOrSquare && c.Family == FamilyPivot.Wind) == 4;
}
else if (yaku == Tsuuiisou)
{
addYaku = combinationsSequence.All(c => c.IsHonor);
}
else if (yaku == Ryuuiisou)
{
addYaku = combinationsSequence.All(c =>
(c.Family == FamilyPivot.Bamboo && c.Tiles.All(t => new[] { 2, 3, 4, 6, 8 }.Contains(t.Number))) ||
(c.Family == FamilyPivot.Dragon && c.Tiles.First().Dragon == DragonPivot.Green)
);
}
else if (yaku == Chinroutou)
{
addYaku = combinationsSequence.All(c => c.IsTerminal);
}
else if (yaku == ChuurenPoutou)
{
if (combinationsSequence.All(c => c.IsConcealed) &&
combinationsSequence.Select(c => c.Family).Distinct().Count() == 1)
{
string numberPattern = string.Join(string.Empty, combinationsSequence.SelectMany(c => c.Tiles).Select(t => t.Number).OrderBy(i => i));
addYaku = new[]
{
"11112345678999", "11122345678999", "11123345678999",
"11123445678999", "11123455678999", "11123456678999",
"11123456778999", "11123456788999", "11123456789999"
}.Contains(numberPattern);
}
}
else if (yaku == Suukantsu)
{
addYaku = combinationsSequence.Count(c => c.IsSquare) == 4;
}
else if (yaku == Tenhou)
{
addYaku = context.IsTenhou();
}
else if (yaku == Chiihou)
{
addYaku = context.IsChiihou();
}
else if (yaku == Renhou)
{
addYaku = context.IsRenhou();
}
else if (yaku == KokushiMusou)
{
// Do nothing here, but prevents the exception below.
}
else
{
throw new NotImplementedException();
}
if (addYaku)
{
yakus.Add(yaku);
}
}
// Remove yakumans with existant upgrade (it's an overkill as the only known case is "Shousuushii" vs. "Daisuushii").
yakus.RemoveAll(y => y.Upgrades.Any(yu => yakus.Contains(yu)));
// Only return yakumans if any.
if (yakus.Count >= 1)
{
return(yakus);
}
foreach (YakuPivot yaku in Yakus.Where(y => !y.IsYakuman))
{
bool addYaku = false;
int occurences = 1;
if (yaku == Chiniisou)
{
addYaku = combinationsSequence.Select(c => c.Family).Distinct().Count() == 1 &&
!combinationsSequence.Any(c => c.IsHonor);
}
else if (yaku == Haitei)
{
addYaku = context.IsRoundLastTile;
}
else if (yaku == RinshanKaihou)
{
addYaku = context.DrawType == DrawTypePivot.Compensation;
}
else if (yaku == Chankan)
{
addYaku = context.DrawType == DrawTypePivot.OpponentKanCallOpen;
}
else if (yaku == Tanyao)
{
addYaku = combinationsSequence.All(c => !c.HasTerminalOrHonor);
}
else if (yaku == Yakuhai)
{
occurences = combinationsSequence.Count(c =>
c.IsBrelanOrSquare && (
c.Family == FamilyPivot.Dragon || (
c.Family == FamilyPivot.Wind && (
c.Tiles.First().Wind == context.DominantWind || c.Tiles.First().Wind == context.PlayerWind
)
)
)
);
addYaku = occurences > 0;
}
else if (yaku == Riichi)
{
addYaku = context.IsRiichi;
}
else if (yaku == Ippatsu)
{
addYaku = context.IsIppatsu;
}
else if (yaku == MenzenTsumo)
{
addYaku = context.DrawType.IsSelfDraw() && combinationsSequence.All(c => c.IsConcealed);
}
else if (yaku == Honiisou)
{
addYaku = combinationsSequence.Where(c => !c.IsHonor).Select(c => c.Family).Distinct().Count() == 1;
}
else if (yaku == Pinfu)
{
addYaku = combinationsSequence.Count(c => c.IsSequence && c.IsConcealed) == 4 &&
!HandPivot.HandWithValuablePair(combinationsSequence, context.DominantWind, context.PlayerWind) &&
combinationsSequence.Any(c => c.IsSequence && c.Tiles.Contains(context.LatestTile) &&
!context.LatestTile.TileIsEdgeWait(c) && !context.LatestTile.TileIsMiddleWait(c));
}
else if (yaku == Iipeikou)
{
int sequencesCount = combinationsSequence.Count(c => c.IsSequence);
addYaku = combinationsSequence.All(c => c.IsConcealed) && sequencesCount >= 2 &&
combinationsSequence.Where(c => c.IsSequence).Distinct().Count() < sequencesCount;
}
else if (yaku == Shousangen)
{
addYaku = combinationsSequence.Count(c => c.IsBrelanOrSquare && c.Family == FamilyPivot.Dragon) == 2 &&
combinationsSequence.Any(c => c.IsPair && c.Family == FamilyPivot.Dragon);
}
else if (yaku == Honroutou)
{
addYaku = combinationsSequence.All(c => c.IsTerminal || c.IsHonor);
}
else if (yaku == Chiitoitsu)
{
addYaku = combinationsSequence.All(c => c.IsPair);
}
else if (yaku == Sankantsu)
{
addYaku = combinationsSequence.Count(c => c.IsSquare) == 3;
}
else if (yaku == SanshokuDoukou)
{
addYaku = combinationsSequence
.Where(c => c.IsBrelanOrSquare && !c.IsHonor)
.GroupBy(c => c.Tiles.First().Number)
.FirstOrDefault(b => b.Count() >= 3)?
.Select(b => b.Family)?
.Distinct()?
.Count() == 3;
}
else if (yaku == Sanankou)
{
addYaku = combinationsSequence.Count(c => c.IsBrelanOrSquare && c.IsConcealed && (!c.Tiles.Contains(context.LatestTile) || context.DrawType.IsSelfDraw())) == 3;
}
else if (yaku == Toitoi)
{
addYaku = combinationsSequence.Count(c => c.IsBrelanOrSquare) == 4;
}
else if (yaku == Ittsu)
{
List <TileComboPivot> ittsuFamilyCombos =
combinationsSequence
.Where(c => c.IsSequence)
.GroupBy(c => c.Family)
.FirstOrDefault(b => b.Count() >= 3)?
.ToList();
addYaku = ittsuFamilyCombos != null &&
ittsuFamilyCombos.Any(c => c.SequenceFirstNumber == 1) &&
ittsuFamilyCombos.Any(c => c.SequenceFirstNumber == 4) &&
ittsuFamilyCombos.Any(c => c.SequenceFirstNumber == 7);
}
else if (yaku == SanshokuDoujun)
{
addYaku = combinationsSequence
.Where(c => c.IsSequence)
.GroupBy(c => c.SequenceFirstNumber)
.FirstOrDefault(b => b.Count() >= 3)?
.Select(b => b.Family)?
.Distinct()?
.Count() == 3;
}
else if (yaku == Chanta)
{
addYaku = combinationsSequence.All(c => c.HasTerminalOrHonor);
}
else if (yaku == DaburuRiichi)
{
addYaku = context.IsRiichi && context.IsFirstTurnRiichi;
}
else if (yaku == Ryanpeikou)
{
addYaku = combinationsSequence.All(c => c.IsConcealed) &&
combinationsSequence.Count(c => c.IsSequence) == 4 &&
combinationsSequence.Where(c => c.IsSequence).Distinct().Count() <= 2;
}
else if (yaku == Junchan)
{
addYaku = combinationsSequence.All(c => c.HasTerminal);
}
else if (yaku == NagashiMangan)
{
// Do nothing here, but prevents the exception below.
}
else
{
throw new NotImplementedException();
}
if (addYaku)
{
for (int i = 0; i < occurences; i++)
{
yakus.Add(yaku);
}
}
}
// Remove yakus with existant upgrade.
// It works because Upgrades is not recursive.
yakus.RemoveAll(y => y.Upgrades.Any(yu => yakus.Contains(yu)));
// On a concealed chanka, only Kokushi is allowed.
if (context.DrawType == DrawTypePivot.OpponentKanCallConcealed && !yakus.Contains(KokushiMusou))
{
yakus.Clear();
}
return(yakus);
}
/// <summary>
/// Computes and sets properties <see cref="Yakus"/> and <see cref="YakusCombinations"/>.
/// </summary>
/// <param name="context">The winning context.</param>
internal void SetYakus(WinContextPivot context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var concealedTiles = new List <TilePivot>(_concealedTiles);
if (!context.DrawType.IsSelfDraw())
{
concealedTiles.Add(context.LatestTile);
}
if (!concealedTiles.Contains(context.LatestTile))
{
throw new InvalidOperationException(Messages.InvalidLatestTileContext);
}
int tilesCount = concealedTiles.Count + _declaredCombinations.Count * 3;
if (tilesCount != 14 && !context.IsNagashiMangan)
{
throw new InvalidOperationException(Messages.InvalidHandTilesCount);
}
Yakus = null;
YakusCombinations = null;
List <List <TileComboPivot> > regularCombinationsSequences = IsCompleteBasic(concealedTiles, new List <TileComboPivot>(_declaredCombinations));
if (IsSevenPairs(concealedTiles))
{
regularCombinationsSequences.Add(new List <TileComboPivot>(concealedTiles.GroupBy(t => t).Select(c => new TileComboPivot(c))));
}
var yakusSequences = new Dictionary <List <YakuPivot>, List <TileComboPivot> >();
if (IsThirteenOrphans(concealedTiles))
{
var yakus = new List <YakuPivot>()
{
YakuPivot.KokushiMusou
};
if (context.IsTenhou())
{
yakus.Add(YakuPivot.Tenhou);
}
else if (context.IsChiihou())
{
yakus.Add(YakuPivot.Chiihou);
}
else if (context.IsRenhou())
{
yakus.Add(YakuPivot.Renhou);
}
yakusSequences.Add(yakus, null);
}
else if (context.IsNagashiMangan)
{
yakusSequences.Add(new List <YakuPivot> {
YakuPivot.NagashiMangan
}, null);
}
else
{
foreach (List <TileComboPivot> combinationsSequence in regularCombinationsSequences)
{
List <YakuPivot> yakus = YakuPivot.GetYakus(combinationsSequence, context);
yakusSequences.Add(yakus, combinationsSequence);
}
}
List <YakuPivot> bestYakusSequence = YakuPivot.GetBestYakusFromList(yakusSequences.Keys, IsConcealed);
if (bestYakusSequence.Count > 0)
{
Yakus = bestYakusSequence;
YakusCombinations = yakusSequences[bestYakusSequence];
}
}