card-game-engine/RuleEngine/Core/GameState.cs

namespace RuleEngine.Core;

using RuleEngine;

public class GameEvent
{
    public string Type { get; set; } = "";
    public string Player { get; set; } = "";
    public string? Description { get; set; }
    public int? Tile { get; set; }
}

public class MahjongGameState
{
    public string Phase { get; set; } = "";
    public Dictionary<string, List<int>> Hands { get; set; } = new();
    public Dictionary<string, List<Meld>> Exposed { get; set; } = new();
    public Dictionary<string, List<int>> FlowerPool { get; set; } = new();
    public List<int> Deck { get; set; } = new();
    public List<int> DiscardPool { get; set; } = new();
    public Dictionary<string, List<int>> DiscardHistory { get; set; } = new();
    public int? LastDiscard { get; set; }
    public string? LastDiscardPlayer { get; set; }
    public string CurrentPlayer { get; set; } = "";
    public List<string> PlayerOrder { get; set; } = new();
    public string Dealer { get; set; } = "";
    public int RoundNumber { get; set; }
    public Dictionary<string, int> Scores { get; set; } = new();
    public List<string> HuPlayers { get; set; } = new();
    public List<string> AlivePlayers { get; set; } = new();
    public Dictionary<string, bool> FuFlags { get; set; } = new();
    public bool IsDeckExhausted { get; set; }
    public List<GameEvent> RecentEvents { get; set; } = new();
    public int FlowerReplaced { get; set; }
    public int? LastDrawnTile { get; set; }
    public WildcardRegistry Wildcards { get; set; } = new();

    // Event flags for event-based fan types (杠上开花/海底捞月/抢杠胡/天胡/地胡)
    public bool IsKongDraw { get; set; }       // 杠后摸牌 — set after kong draw, cleared on next discard
    public bool IsLastTile { get; set; }       // 海底 — set when deck has 1 tile before draw
    public bool IsRobbedKong { get; set; }     // 抢杠 — set when someone adds to pung (bu_kong)
    public bool IsFirstTurn { get; set; }      // 第一轮 — set for dealer after deal, non-dealer after first draw
    public string? DealerOnFirstTurn { get; set; } // 庄家首轮(用于天胡判断)

    public MahjongGameState Clone()
    {
        return new MahjongGameState
        {
            Phase = Phase,
            Hands = Hands.ToDictionary(kv => kv.Key, kv => new List<int>(kv.Value)),
            Exposed = Exposed.ToDictionary(kv => kv.Key, kv => kv.Value.Select(m => m.Clone()).ToList()),
            FlowerPool = FlowerPool.ToDictionary(kv => kv.Key, kv => new List<int>(kv.Value)),
            Deck = new List<int>(Deck),
            DiscardPool = new List<int>(DiscardPool),
            LastDiscard = LastDiscard,
            LastDiscardPlayer = LastDiscardPlayer,
            CurrentPlayer = CurrentPlayer,
            PlayerOrder = new List<string>(PlayerOrder),
            Dealer = Dealer,
            RoundNumber = RoundNumber,
            Scores = new Dictionary<string, int>(Scores),
            HuPlayers = new List<string>(HuPlayers),
            AlivePlayers = new List<string>(AlivePlayers),
            FuFlags = new Dictionary<string, bool>(FuFlags),
            IsDeckExhausted = IsDeckExhausted,
            RecentEvents = new List<GameEvent>(RecentEvents),
            FlowerReplaced = FlowerReplaced,
            LastDrawnTile = LastDrawnTile,
            Wildcards = Wildcards.Clone(),
            IsKongDraw = IsKongDraw,
            IsLastTile = IsLastTile,
            IsRobbedKong = IsRobbedKong,
            IsFirstTurn = IsFirstTurn,
            DealerOnFirstTurn = DealerOnFirstTurn
        };
    }

    public void AddEvent(string type, string player, int? tile = null, string? desc = null)
    {
        RecentEvents.Add(new GameEvent
        {
            Type = type,
            Player = player,
            Tile = tile,
            Description = desc
        });
    }
}