using System.Numerics;

namespace AcDream.App.Physics;

/// <summary>
/// Session-scoped observation timestamps used to infer when a remote
/// locomotion cycle has stopped. Canonical live identity remains in
/// <c>LiveEntityRuntime</c>; this owner contains only derived observer state.
/// </summary>
internal sealed class RemoteMovementObservationTracker
{
    private readonly Dictionary<uint, (Vector3 Pos, DateTime Time)> _lastMove = new();

    internal (Vector3 Pos, DateTime Time) this[uint serverGuid]
    {
        set => _lastMove[serverGuid] = value;
    }

    internal bool TryGetValue(
        uint serverGuid,
        out (Vector3 Pos, DateTime Time) observation) =>
        _lastMove.TryGetValue(serverGuid, out observation);

    internal bool Remove(uint serverGuid) => _lastMove.Remove(serverGuid);

    internal void Clear() => _lastMove.Clear();
}