using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.Cip;
using ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.Logix;
namespace ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.Tests.Logix;

// No template exchange exists in the golden captures (ab_server has no Template Object), so these
// are layout tests against the brief / CIP spec.
public sealed class TemplateObjectServicesTests
{
    [Fact]
    public void Get_attributes_request() =>
        Convert.ToHexString(TemplateObjectServices.GetAttributes(0x0123)).ShouldBe(
            "0303" + "206C2500" + "2301" + "0400" + "0400" + "0500" + "0200" + "0100");

    [Fact]
    public void Parse_attributes()
    {
        var reply = CipReply.Parse(Convert.FromHexString("83000000" + "0400"
            + "0400" + "0000" + "2A000000"
            + "0500" + "0000" + "18000000"
            + "0200" + "0000" + "0300"
            + "0100" + "0000" + "CE0F"));
        var a = TemplateObjectServices.ParseAttributes(reply);
        a.ShouldBe(new TemplateAttributes(42, 24, 3, 0x0FCE));
    }

    [Fact]
    public void Parse_attributes_nonzero_attribute_status_throws()
    {
        var reply = CipReply.Parse(Convert.FromHexString("83000000" + "0100" + "0400" + "0100" + "2A000000"));
        Should.Throw<AbTransportException>(() => TemplateObjectServices.ParseAttributes(reply));
    }

    [Fact]
    public void Read_template_request() =>
        Convert.ToHexString(TemplateObjectServices.ReadTemplate(0x0123, 0x20, 0x1F4)).ShouldBe(
            "4C03" + "206C2500" + "2301" + "20000000" + "F401");

    [Fact]
    public void Read_more_follows_status_0x06()
    {
        TemplateObjectServices.ReadHasMore(new CipReply(0x4C, 0x06, [], ReadOnlyMemory<byte>.Empty)).ShouldBeTrue();
        TemplateObjectServices.ReadHasMore(new CipReply(0x4C, 0x00, [], ReadOnlyMemory<byte>.Empty)).ShouldBeFalse();
    }

    [Fact]
    public void Decoder_buffer_header()
    {
        var buf = TemplateObjectServices.BuildDecoderBuffer(0x0123, new TemplateAttributes(42, 24, 3, 0x0FCE), [0xAA, 0xBB]);
        Convert.ToHexString(buf).ShouldBe("2301" + "2A000000" + "18000000" + "0300" + "CE0F" + "AABB");
    }
}