using GatewayKeepalive.Windows;

namespace GatewayKeepalive.Tests;

internal static class NativeLayoutTests
{
    public static Task X64LayoutAsync()
    {
        Check.Equal(8, IntPtr.Size, "Native layout assertions require the x64 test host");
        var layout = WindowsNetworkBackend.NativeLayout();
        var properties = layout.GetType().GetProperties().ToDictionary(property => property.Name, property => property.GetValue(layout));

        int Read(string name)
        {
            Check.True(properties.TryGetValue(name, out var value), $"NativeLayout should expose {name}");
            return (int)value!;
        }

        Check.Equal(104, Read("RouteSize"), "MIB_IPFORWARD_ROW2 x64 size");
        Check.Equal(168, Read("InterfaceSize"), "MIB_IPINTERFACE_ROW x64 size");
        Check.Equal(64, Read("DnsSize"), "DNS_SETTINGS x64 size");
        Check.Equal(84, Read("RouteMetricOffset"), "MIB_IPFORWARD_ROW2 metric offset");
        Check.Equal(148, Read("InterfaceMetricOffset"), "MIB_IPINTERFACE_ROW metric offset");
        return Task.CompletedTask;
    }
}