using Xunit;

namespace Admin.NET.Plugin.AiDOP.Tests.Infrastructure;

public class AidopMenuLinkSyncContractTests
{
    [Fact]
    public void StartupSync_MaintainsTenantMenus_ButNeverReconcilesRoleMenus()
    {
        var source = File.ReadAllText(FindSourceFile());
        var ensureLinked = ExtractMethod(source, "public static void EnsureLinked(IServiceProvider services)");

        Assert.Contains("SysTenantMenu", ensureLinked);
        Assert.DoesNotContain("SysRoleMenu", ensureLinked);
    }

    private static string ExtractMethod(string source, string signature)
    {
        var signatureIndex = source.IndexOf(signature, StringComparison.Ordinal);
        Assert.True(signatureIndex >= 0, $"Method not found: {signature}");

        var bodyStart = source.IndexOf('{', signatureIndex);
        Assert.True(bodyStart >= 0, $"Method body not found: {signature}");

        var depth = 0;
        for (var i = bodyStart; i < source.Length; i++)
        {
            if (source[i] == '{') depth++;
            if (source[i] != '}') continue;
            depth--;
            if (depth == 0) return source[signatureIndex..(i + 1)];
        }

        throw new InvalidOperationException($"Method body is incomplete: {signature}");
    }

    private static string FindSourceFile()
    {
        var directory = new DirectoryInfo(AppContext.BaseDirectory);
        while (directory != null)
        {
            var candidate = Path.Combine(
                directory.FullName,
                "server",
                "Plugins",
                "Admin.NET.Plugin.AiDOP",
                "Infrastructure",
                "AidopMenuLinkSync.cs");
            if (File.Exists(candidate)) return candidate;
            directory = directory.Parent;
        }

        throw new FileNotFoundException("AidopMenuLinkSync.cs not found from test output path.");
    }
}