using AcDream.App.UI.Layout;
using DatReaderWriter;

namespace AcDream.App.Tests.UI.Layout;

/// <summary>
/// CA5 re-check pin (2026-08-24): the popup skins' shared TEXT CHILD
/// (0x10000396) authors <c>P0x3D=256</c> — the wrap width retail's
/// <c>InqSizewMargins UITS_MAX_WIDTH</c> reads BEFORE its display-width
/// fallback. TS-85's earlier "zero elements author P0x3D" sweep covered
/// hover TARGETS only, never the popup skins; this pin closes that gap so
/// a DAT revision (or importer regression) that loses the bound fails
/// loudly instead of silently un-wrapping every tooltip.
/// </summary>
[Trait("Lane", "InstalledDat")]
public sealed class TooltipSkinLiveDatTests
{
    private static string DatDirectory =>
        Path.Combine(
            Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
            "Documents", "Asheron's Call");

    [InstalledDatFact]
    public void EveryPopupSkinTextChildAuthorsTheRetailWrapBound()
    {
        using var dats = new DatCollection(
            DatDirectory, DatReaderWriter.Options.DatAccessType.Read);
        ElementInfo? tree = LayoutImporter.ImportInfos(dats, 0x21000041u);
        Assert.NotNull(tree);

        int textChildren = 0;
        void Walk(ElementInfo e, uint parentId)
        {
            if (e.Id == 0x10000396u && e.Type == 12)
            {
                textChildren++;
                Assert.Equal(256, e.MaxWidth);
                // Retail wraps at (256 - margL - margR) and draws inset by
                // the margins — the CA5 owner-screenshot delta (one extra
                // word on line one + text flush against the right border).
                // All four skins author L=2/R=2; skin 0x10000398 alone
                // authors no vertical margins (live-DAT probe 2026-08-24).
                Assert.Equal(2, e.MarginLeft);
                Assert.Equal(2, e.MarginRight);
                int vertical = parentId == 0x10000398u ? 0 : 2;
                Assert.Equal(vertical, e.MarginTop);
                Assert.Equal(vertical, e.MarginBottom);
            }
            foreach (var c in e.Children) Walk(c, e.Id);
        }
        Walk(tree!, 0);
        Assert.True(textChildren >= 4,
            $"expected the text child under all four popup skins, found {textChildren}");
    }
}