using System.Text.RegularExpressions;
using Material.Icons;

namespace ClaudeDo.Ui.Tests;

/// <summary>Guards every <c>mdi:Name</c> literal in the Ui sources: an unknown kind makes IconKeyConverter return null and the icon silently vanishes.</summary>
public class MdiIconNamesTests
{
    /// <summary><c>mdi:Name</c> in XAML/C# plus <c>MdiGeometry("Name")</c> (MarkdownView prefixes the key itself).</summary>
    private static readonly Regex NamePattern = new(@"mdi:(\w+)|MdiGeometry\(""(\w+)""\)", RegexOptions.Compiled);

    [Fact]
    public void EveryMdiNameInUiSources_IsAMaterialIconKind()
    {
        var uiDir = Path.Combine(FindRepoRoot(), "src", "ClaudeDo.Ui");
        var files = Directory.EnumerateFiles(uiDir, "*.*", SearchOption.AllDirectories)
            .Where(f => (f.EndsWith(".axaml") || f.EndsWith(".cs"))
                        && !f.Contains($"{Path.DirectorySeparatorChar}obj{Path.DirectorySeparatorChar}")
                        && !f.Contains($"{Path.DirectorySeparatorChar}bin{Path.DirectorySeparatorChar}"));

        var unknown = new List<string>();
        var seen = 0;
        foreach (var file in files)
            foreach (Match m in NamePattern.Matches(File.ReadAllText(file)))
            {
                seen++;
                var name = m.Groups[1].Success ? m.Groups[1].Value : m.Groups[2].Value;
                if (!Enum.TryParse<MaterialIconKind>(name, out _))
                    unknown.Add($"{Path.GetRelativePath(uiDir, file)}: {name}");
            }

        Assert.True(seen > 0, "scan found no mdi: names — the pattern or the repo-root lookup is broken");
        Assert.True(unknown.Count == 0, "Unknown MaterialIconKind names:\n" + string.Join('\n', unknown));
    }

    private static string FindRepoRoot()
    {
        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        while (dir is not null && !File.Exists(Path.Combine(dir.FullName, "ClaudeDo.slnx")))
            dir = dir.Parent;
        return dir?.FullName ?? throw new InvalidOperationException("ClaudeDo.slnx not found above " + AppContext.BaseDirectory);
    }
}