using NUnit.Framework;
using SVSim.BattleNode.Bridge;
using SVSim.BattleNode.Sessions;
using SVSim.BattleNode.Sessions.Dispatch;

namespace SVSim.UnitTests.BattleNode.Sessions;

[TestFixture]
public class BattleSessionStateTests
{
    private sealed class StubParticipant : IBattleParticipant
    {
        public long ViewerId { get; }
        public MatchContext Context { get; }
        public event Func<SVSim.BattleNode.Protocol.MsgEnvelope, CancellationToken, Task>? FrameEmitted;
        public StubParticipant(long id, MatchContext ctx) { ViewerId = id; Context = ctx; }
        public Task PushAsync(SVSim.BattleNode.Protocol.MsgEnvelope e, bool n, CancellationToken c) => Task.CompletedTask;
        public Task RunAsync(CancellationToken c) => Task.CompletedTask;
        public Task TerminateAsync(BattleFinishReason r) => Task.CompletedTask;
        public ValueTask DisposeAsync() => ValueTask.CompletedTask;
        private void Touch() => FrameEmitted?.Invoke(null!, default);
    }

    private static MatchContext Ctx(params long[] deck) => new(
        SelfDeckCardIds: deck, ClassId: "1", CharaId: "1", CardMasterName: "cm",
        CountryCode: "KOR", UserName: "P", SleeveId: "0", EmblemId: "0", DegreeId: "0",
        FieldId: 0, IsOfficial: 0, BattleType: 11);

    [Test]
    public void GetOrSeedDeckMap_maps_idx_1based_to_deck_cardIds()
    {
        var state = new BattleSessionState();
        var p = new StubParticipant(1, Ctx(900L, 901L, 902L));

        var map = state.GetOrSeedDeckMap(p);

        Assert.That(map[1], Is.EqualTo(900L));
        Assert.That(map[2], Is.EqualTo(901L));
        Assert.That(map[3], Is.EqualTo(902L));
        Assert.That(map.ContainsKey(4), Is.False);
    }

    [Test]
    public void GetOrSeedDeckMap_is_idempotent_same_instance()
    {
        var state = new BattleSessionState();
        var p = new StubParticipant(1, Ctx(900L));
        Assert.That(state.GetOrSeedDeckMap(p), Is.SameAs(state.GetOrSeedDeckMap(p)));
    }
}