acdream/tests/AcDream.App.Tests/UI/MossTankMarkupBuildOverRealFilesTests.cs

using System.Numerics;
using AcDream.App.Rendering;
using AcDream.App.Rendering.Gpu;
using AcDream.App.Tests.Rendering.Gpu;
using AcDream.App.UI;
using AcDream.Plugin.Abstractions;
using AcDream.Plugins.MossTank;
using Xunit;

namespace AcDream.App.Tests.UI;

/// <summary>
/// Fix round B item 15. Every existing MossTank markup pin
/// (<c>MossTankMarkupContractTests</c>) validates <c>mosstank*.xml</c>
/// against <see cref="MossTankPanel"/> through reflection alone — "does a
/// public property with this name and this CLR type exist" — never through
/// <see cref="MarkupDocument.Build"/> itself, the code that actually mounts
/// a plugin panel at runtime. <c>MarkupDocument.Build</c> has its own
/// validation a reflection-only check can't see (attribute-format
/// exceptions like <c>ValidateArtStyle</c>'s "must be plain or retail",
/// delegate-shape mismatches surfaced as thrown <see cref="FormatException"/>s
/// rather than a missing property, numeric-attribute parsing, column-type
/// dispatch). Before this test, a markup bug of that shape would throw
/// inside <c>RetailUiRuntime.MountPlugins</c>'s own try/catch and the panel
/// would simply not appear — no test failure, no visible error short of a
/// live client screenshot. This builds every real <c>mosstank*.xml</c> file
/// against a REAL <see cref="MossTankPanel"/> (a stub <see cref="IPluginHost"/>,
/// same shape as <c>MossTankMarkupContractTests.StubHost</c>) so a bad
/// attribute fails a test instead of dropping the panel silently at mount.
/// </summary>
public sealed class MossTankMarkupBuildOverRealFilesTests
{
    private static string MossTankMarkupDirectory =>
        Path.Combine(AppContext.BaseDirectory, "MossTank");

    public static IEnumerable<object[]> MossTankMarkupFiles() =>
        Directory.GetFiles(MossTankMarkupDirectory, "mosstank*.xml")
            .OrderBy(static path => path, StringComparer.Ordinal)
            .Select(static path => new object[] { path });

    [Theory]
    [MemberData(nameof(MossTankMarkupFiles))]
    public void EveryMossTankPanelFileBuildsAgainstARealPanelWithNoException(string path)
    {
        string xml = File.ReadAllText(path);
        var panel = new MossTankPanel(new StubHost());

        UiNineSlicePanel built = MarkupDocument.Build(xml, panel, static id => (id, 32, 32));

        Assert.NotNull(built);
        Assert.NotEmpty(built.Children);
    }

    /// <summary>
    /// Round D item 4's own re-layout proof: the Monsters tab's real
    /// mosstank.xml list carries <c>anchor="left right top bottom"</c>
    /// (EveryStretchingListDeclaresARealAnchor, MossTankMarkupContractTests,
    /// pins the attribute is present; this proves the attribute actually
    /// DOES something through the real anchor machinery) — widening the
    /// built root panel widens the Monsters list in turn, the same
    /// mechanism MarkupResizableAnchorTests.ResizingPanel_LeftRightList_
    /// WidensWithThePanel proves against synthetic markup, now proven
    /// against the real shipped file.
    /// </summary>
    [Fact]
    public void WideningTheRealMainPanelWidensTheRealMonstersList()
    {
        string xml = File.ReadAllText(
            Path.Combine(MossTankMarkupDirectory, "mosstank.xml"));
        var panel = new MossTankPanel(new StubHost());

        UiNineSlicePanel built = MarkupDocument.Build(xml, panel, static id => (id, 32, 32));

        // Every tab's group is visibility-bound ("visible={XVisible}") to
        // StubHost's own IsAvailable=false automation, so relying on the
        // normal VisibleSource/TickSelfAndChildren reconciliation would
        // hide every tab (including the root). This test cares about the
        // anchor mechanism, not the tab-switching one — it makes the
        // Monsters group (the 4th of the nine tab groups in file order:
        // Options/Profiles/Vitals/Monsters/...) visible directly. Exact
        // type match, not OfType<UiPanel>() — UiSimpleButton/
        // UiMarkupTabButton (the tab strip) are ALSO UiPanel subtypes;
        // only a bare <group> compiles to the base UiPanel type itself.
        UiPanel[] tabGroups = built.Children
            .Where(static child => child.GetType() == typeof(UiPanel))
            .Cast<UiPanel>()
            .ToArray();
        Assert.Equal(9, tabGroups.Length);
        foreach (UiPanel group in tabGroups)
            group.Visible = false;
        UiPanel monstersGroup = tabGroups[3];
        monstersGroup.Visible = true;
        UiMarkupList monstersList = Assert.Single(monstersGroup.Children.OfType<UiMarkupList>());

        var device = new RecordingGpuDevice();
        var renderer = new TextRenderer(device, new NullGpuFrameSource(), "unused");
        renderer.Begin(new Vector2(1400f, 900f));
        var ctx = new UiRenderContext(renderer, new Vector2(1400f, 900f));

        // First draw at the authored (already-enlarged, 984 wide) default
        // captures the list's anchor baseline.
        built.DrawSelfAndChildren(ctx);
        float widthAtAuthoredDefault = monstersList.Width;

        // A live drag-resize (RetailWindowManager.ResizeTo) mutates Width
        // directly; the next draw re-applies the captured margins against
        // the NEW panel width.
        built.Width += 100f;
        built.DrawSelfAndChildren(ctx);

        Assert.True(
            monstersList.Width > widthAtAuthoredDefault,
            $"Monsters list width did not grow: {widthAtAuthoredDefault} -> {monstersList.Width}");
    }

    private sealed class NullGpuFrameSource : ICurrentGpuFrameSource
    {
        public IGpuFrame? CurrentFrame => null;
    }

    private sealed class StubHost : IPluginHost
    {
        public bool HasUi => false;
        public IPluginLogger Log { get; } = new StubLogger();
        public IGameState State { get; } = new StubState();
        public IEvents Events { get; } = new StubEvents();
        public ISelectionService Selection { get; } = new StubSelection();
        public IUiRegistry Ui => NoOpUiRegistry.Instance;
        public IAutomationSurface Automation => NoOpAutomationSurface.Instance;
    }

    private sealed class StubLogger : IPluginLogger
    {
        public void Info(string message) { }
        public void Warn(string message) { }
        public void Error(string message, Exception? exception = null) { }
    }

    private sealed class StubState : IGameState
    {
        public IReadOnlyList<WorldEntitySnapshot> Entities => [];
    }

    private sealed class StubEvents : IEvents
    {
        public event Action<WorldEntitySnapshot> EntitySpawned
        {
            add { }
            remove { }
        }
        public event Action<double> Tick
        {
            add { }
            remove { }
        }
    }

    private sealed class StubSelection : ISelectionService
    {
        public uint? SelectedObjectId => null;
        public uint? PreviousObjectId => null;
        public event Action<SelectionChangedEvent> Changed
        {
            add { }
            remove { }
        }
        public bool Select(uint objectId) => false;
        public bool Clear() => false;
    }
}