using Shouldly;
using Xunit;

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

/// <summary>
///     Pins <c>DriverStatusPanel</c> to the <c>/hosts</c> page (Gitea #546). The panel is the only
///     component carrying the Restart/Reconnect driver controls, and it had ZERO references
///     repo-wide — the commands worked end to end over the mesh transport while no user could reach
///     them, and nothing failed to build, test or deploy. Deleting the last <c>&lt;DriverStatusPanel</c>
///     tag would silently restore exactly that state, so it is pinned here.
/// </summary>
/// <remarks>
///     This is a source scan rather than a rendering assertion because the repo has no bUnit (same
///     technique as <c>MeshRegistrationRoleScopingTests</c>; panel markup is otherwise live-verified).
///     A scan proves reachability of the component, not that it renders correctly.
/// </remarks>
[Trait("Category", "Unit")]
public sealed class HostsPanelWiringTests
{
    private static string ReadHostsPageSource()
    {
        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;
        dir.ShouldNotBeNull("could not locate the repository root (no ZB.MOM.WW.OtOpcUa.slnx above the test binary)");

        return File.ReadAllText(Path.Combine(
            dir!.FullName, "src", "Server", "ZB.MOM.WW.OtOpcUa.AdminUI",
            "Components", "Pages", "Hosts.razor"));
    }

    /// <summary>THE #546 regression pin: the panel must remain reachable from a routable page.</summary>
    [Fact]
    public void Hosts_page_renders_the_driver_status_panel()
    {
        ReadHostsPageSource().ShouldContain(
            "<DriverStatusPanel",
            Case.Sensitive,
            customMessage:
                "/hosts no longer renders DriverStatusPanel — the Restart/Reconnect driver controls " +
                "are orphaned again with no reachable UI, which is Gitea #546");
    }

    /// <summary>
    ///     The panel must be fed the dialog driver's real identity and enabled-state, not literals.
    ///     Hard-coding any of the three would make every dialog drive the same driver, or claim a
    ///     disabled instance is live — both of which a source scan for the tag alone would pass.
    ///     Since the Controls dialog rework the panel renders once, inside the modal, bound to the
    ///     row that <c>FindControlsDriver()</c> re-resolves from the current groups (<c>cd</c>/<c>cg</c>)
    ///     — never to a cached row record, which the 5 s rebuild replaces.
    /// </summary>
    [Fact]
    public void The_panel_is_bound_to_the_dialogs_own_driver_cluster_and_enabled_state()
    {
        var source = ReadHostsPageSource();

        source.ShouldContain("DriverInstanceId=\"@cd.DriverInstanceId\"");
        source.ShouldContain("ClusterId=\"@cg.ClusterId\"");
        source.ShouldContain("Enabled=\"@cd.Enabled\"");
    }
}