public static bool canChi(IEnumerable<Pai> tehai, Pai pai)
{
if (pai.Suit == Suit.Jihai) return false;
tehai = tehai.Select(p => p.RemoveRed());
pai = pai.RemoveRed();
if (pai.Num >= 3 && tehai.Contains(pai - 2) && tehai.Contains(pai - 1)) return true;
if (pai.Num >= 2 && pai.Num <= 8 && tehai.Contains(pai - 1) && tehai.Contains(pai + 1)) return true;
if (pai.Num <= 7 && tehai.Contains(pai + 1) && tehai.Contains(pai + 2)) return true;
return false;
}
public static bool canKan(IEnumerable<Pai> tehai, Pai pai)
{
tehai = tehai.Select(p => p.RemoveRed());
pai = pai.RemoveRed();
return tehai.Count(p => p == pai) >= 3;
}
public object onDahai(int actor, Pai pai, bool tsumogiri)
{
foreach (var component in components)
component.onDahai(actor, pai, tsumogiri);
if (actor == id)
{
tehai.Remove(pai);
return Protocol.none();
}
else
{
List<SelectionType> alternatives = new List<SelectionType>();
if ((actor + 1) % 4 == id && Algorithm.canChi(tehai, pai))
alternatives.Add(SelectionType.Chi);
if (Algorithm.canPon(tehai, pai))
{
Console.WriteLine(string.Join(", ", tehai.Select(p => p.ToString()).ToArray()));
alternatives.Add(SelectionType.Pon);
}
if (Algorithm.canKan(tehai, pai))
alternatives.Add(SelectionType.Kan);
if (Algorithm.canRon(tehai, pai))
alternatives.Add(SelectionType.Ron);
if (!alternatives.Any())
{
return Protocol.none();
}
else
{
alternatives.Add(SelectionType.Pass);
return window.Select2(alternatives).match<object>(
(pai1, pai2) =>
Protocol.chi(id, actor, pai, new List<Pai> { pai1, pai2 })
,
(pai1, pai2) =>
Protocol.pon(id, actor, pai, new List<Pai> { pai1, pai2 })
,
() =>
Protocol.kan(id, actor, pai, tehai.FindAll(p => p.RemoveRed() == pai.RemoveRed()))
,
() =>
Protocol.hora(id, actor, pai)
,
() =>
Protocol.none()
);
}
}
}