namespace AcDream.App.Physics;

/// <summary>
/// Preserves retail ForcePosition's atomic local order: validate the accepted
/// Position authority, blip once, acknowledge once, then stop if the
/// acknowledgement synchronously displaced that authority.
/// </summary>
internal static class LocalForcePositionTransaction
{
    internal static bool Apply(
        bool isForcePosition,
        Func<bool> isCurrent,
        Action blip,
        Action acknowledge)
    {
        ArgumentNullException.ThrowIfNull(isCurrent);
        ArgumentNullException.ThrowIfNull(blip);
        ArgumentNullException.ThrowIfNull(acknowledge);

        if (!isForcePosition)
            return true;
        if (!isCurrent())
            return false;

        blip();
        acknowledge();
        return isCurrent();
    }
}