using Hokm.Engine;

// All-AI simulation to validate the C# engine port (mirrors scripts/sim.ts).
var rng = new Random(12345);
int N = 300;
int totalRounds = 0;

for (int i = 0; i < N; i++)
{
    var (rounds, tricks) = PlayMatch(rng);
    totalRounds += rounds;
    if (tricks <= 0) throw new Exception("no tricks played");
}

Console.WriteLine($"OK: {N} matches completed. avg rounds/match = {(double)totalRounds / N:0.0}");

static (int rounds, int tricks) PlayMatch(Random rng)
{
    var g = Rules.CreateInitial(new[] { "P0", "P1", "P2", "P3" }, 7);
    Rules.SelectHakem(g, rng);
    Rules.DealForTrump(g, rng);

    int rounds = 0, tricks = 0, guard = 0;
    while (g.Phase != Phase.MatchOver)
    {
        if (++guard > 200000) throw new Exception("loop guard tripped");

        switch (g.Phase)
        {
            case Phase.ChoosingTrump:
                Rules.ChooseTrump(g, Ai.ChooseTrump(g.Players[g.Hakem!.Value].Hand));
                break;
            case Phase.Playing:
                int seat = g.Turn!.Value;
                Rules.PlayCard(g, seat, Ai.ChooseCard(g, seat));
                break;
            case Phase.TrickComplete:
                tricks++;
                if (g.CurrentTrick.Count != 4) throw new Exception("trick not full");
                Rules.AdvanceAfterTrick(g, 2);
                break;
            case Phase.RoundOver:
                rounds++;
                if (g.RoundTricks[0] + g.RoundTricks[1] > 13) throw new Exception("too many tricks");
                Rules.StartNextRound(g, rng);
                break;
            default:
                throw new Exception("unexpected phase: " + g.Phase);
        }
    }
    return (rounds, tricks);
}