namespace PRecAnnot.Plant3D2026;

public sealed record Plant3D2026Availability(bool IsAvailable, string InstallDirectory, IReadOnlyList<string> MissingAssemblies)
{
    public static Plant3D2026Availability Detect(string installDirectory)
    {
        var expected = new[] { "AcMgd.dll", "AcDbMgd.dll", "AcCoreMgd.dll", "PnPDataLinks.dll", Path.Combine("PLNT3D", "PnPProjectManagerMgd.dll"), Path.Combine("PLNT3D", "PnP3dObjectsMgd.dll") };
        var missing = expected.Where(x => !File.Exists(Path.Combine(installDirectory, x))).ToArray();
        return new(missing.Length == 0, installDirectory, missing);
    }
}

public sealed class Plant3D2026BlockedException(Plant3D2026Availability availability)
    : InvalidOperationException($"Plant 3D 2026 assemblies are unavailable at '{availability.InstallDirectory}'. Missing: {string.Join(", ", availability.MissingAssemblies)}") { }