using Opc.Ua;

namespace ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests;

/// <summary>Observes wire payloads using the CLR representations asserted by the baseline contract tests.</summary>
internal static class SdkTestValues
{
    internal static object? ClrValue(this DataValue value) => value.WrappedValue.ClrValue();
    internal static object? ClrValue(this Variant value) => value.AsBoxedObject(Variant.BoxingBehavior.Legacy) switch
    {
        ByteString bytes => bytes.IsNull ? null : bytes.ToArray(),
        DateTimeUtc time => (DateTime)time,
        Uuid id => (Guid)id,
        var other => other,
    };

    internal static Variant FromClr(object? value)
    {
        if (value is null) return Variant.Null;
        if (value is byte[] bytes) return Variant.From(ByteString.From(bytes));
        if (VariantHelper.TryCastFrom(value, out var variant)) return variant;
        throw new ArgumentException("Unsupported test payload.", nameof(value));
    }
}