using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.AdminUI.Uns;

namespace ZB.MOM.WW.OtOpcUa.AdminUI.Tests.Uns;

/// <summary>
///     G2-F2: a Sparkplug array / unsupported-type metric is refused at commit with a "not bindable in this
///     version" message that echoes the browser's descriptor — not the "attribute lookup returned nothing"
///     text, which is reserved for a lookup that really did return nothing.
/// </summary>
[Trait("Category", "Unit")]
public sealed class MqttUnbindableLeafMessageTests
{
    [Fact]
    public void An_array_metric_says_it_is_not_bindable_and_echoes_the_descriptor()
    {
        const string descriptor = "Metric · Int32Array · alias 7 · array metrics are not read in v1 — not bindable";

        var error = RawBrowseCommitMapper.DescribeUncommittableLeaf("Mqtt", "Pressures", addressFields: null, descriptor);

        error.ShouldNotBeNull();
        error!.ShouldContain("'Pressures' cannot be bound in this version");
        error.ShouldContain(descriptor);
        error.ShouldNotContain("attribute lookup returned nothing");
    }

    [Fact]
    public void A_lookup_that_returned_nothing_keeps_the_original_message()
    {
        // Positive control: the new branch is selected by the descriptor, not by MQTT in general.
        RawBrowseCommitMapper.DescribeUncommittableLeaf("Mqtt", "Temperature", addressFields: null, descriptor: null)!
            .ShouldContain("attribute lookup returned nothing");
        RawBrowseCommitMapper.DescribeUncommittableLeaf("Mqtt", "Temperature", null, "Metric · Double")!
            .ShouldContain("attribute lookup returned nothing");
    }

    [Fact]
    public void A_bindable_leaf_is_never_refused_whatever_its_descriptor_says()
        => RawBrowseCommitMapper.DescribeUncommittableLeaf(
                "Mqtt", "Temperature",
                new Dictionary<string, string> { [ZB.MOM.WW.OtOpcUa.Driver.Mqtt.MqttTagConfigKeys.MetricName] = "Temperature" },
                "anything · not bindable")
            .ShouldBeNull();

    [Fact]
    public void The_marker_matches_what_the_sparkplug_browser_writes()
    {
        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        while (dir is not null && !File.Exists(Path.Combine(dir.FullName, "ZB.MOM.WW.OtOpcUa.slnx"))) dir = dir.Parent;
        var browser = File.ReadAllText(Path.Combine(dir!.FullName, "src", "Drivers",
            "ZB.MOM.WW.OtOpcUa.Driver.Mqtt.Browser", "MqttBrowseSession.cs"));

        browser.ShouldContain("— " + RawBrowseCommitMapper.NotBindableMarker + "\")");
        AdminUiSource.Read("Components", "Shared", "Raw", "RawBrowseModal.razor")
            .ShouldContain("DescribeUncommittableLeaf(_driverType, s.Name, s.AddressFields, s.Descriptor)");
    }
}