namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests.Deployment;

/// <summary>
/// Design 2026-08-20: the Connection Bindings panel must be driven by the flattened
/// configuration (every composed module member), not by the template's direct
/// attributes — 264 of Z28061's 280 bindings were invisible on QA. Structural pins
/// over the page source, matching the existing InstanceConfigure coverage style.
/// </summary>
public class InstanceConfigureBindingRowsTests
{
    /// <summary>Reads the InstanceConfigure page markup from the source tree.</summary>
    /// <returns>The full text of <c>InstanceConfigure.razor</c>.</returns>
    internal static string ReadMarkup()
    {
        var dir = AppContext.BaseDirectory;
        for (var i = 0; i < 6 && dir is not null; i++) dir = Directory.GetParent(dir)?.FullName;
        return File.ReadAllText(Path.Combine(dir!, "src", "ZB.MOM.WW.ScadaBridge.CentralUI",
            "Components", "Pages", "Deployment", "InstanceConfigure.razor"));
    }

    private static string Markup => ReadMarkup();

    /// <summary>Verifies that binding rows come from the flattened configuration rather than the template attributes.</summary>
    [Fact]
    public void BindingRows_ComeFromFlattenedConfiguration_NotTemplateAttributes()
    {
        var m = Markup;
        Assert.Contains("LoadBindingRowsAsync", m);
        Assert.Contains("BindingGroupBuilder.Build(", m);
        // The old direct-attribute projection must be gone from the bindings path.
        Assert.DoesNotContain("_bindingDataSourceAttrs = attrs.Where(a => !string.IsNullOrEmpty(a.DataSourceReference))", m);
        Assert.Contains("DefaultDataSourceReference", m);
    }

    /// <summary>Verifies that binding rows fall back to direct attributes with a warning banner when flattening fails.</summary>
    [Fact]
    public void BindingRows_FallBackToDirectAttributes_WithBanner_WhenFlattenFails()
    {
        var m = Markup;
        Assert.Contains("_bindingSourceWarning", m);
        Assert.Contains("data-test=\"binding-source-warning\"", m);
    }

    /// <summary>Verifies that save and test cover every binding row.</summary>
    [Fact]
    public void SaveAndTest_CoverEveryRow()
    {
        var m = Markup.Replace("\r\n", "\n");
        // Save posts the whole selection dictionary (hidden-row survival property).
        Assert.Contains("_bindingSelections\n                .Select(kv => new ConnectionBinding(", m);
        // Test Bindings iterates the grouped rows, not the legacy attr list.
        Assert.Contains("foreach (var g in _bindingGroups)", m);
    }
}