namespace RhMcp.Tools;

[McpServerToolType]
public static class OpenDocTool
{
    [McpServerTool("open_doc", "Open / Import Document", false, true)]
    [Description("Import a .3dm (or other supported) file into the current document. Headless — no dialogs. Optionally clear the document first to make this behave like an open-in-place.")]
    public static string OpenDoc(
        RhinoDoc doc,
        [Description("Absolute path to the file to import")] string path,
        [Description("If true, delete all objects in the current document before importing")] bool clearFirst = false)
    {
        if (string.IsNullOrWhiteSpace(path))
            throw new ArgumentException("path is required.", nameof(path));

        if (!System.IO.File.Exists(path))
            throw new System.IO.FileNotFoundException($"File not found: {path}", path);

        int cleared = 0;
        if (clearFirst)
        {
            var ids = doc.Objects.Select(o => o.Id).ToList();
            foreach (var id in ids)
                if (doc.Objects.Delete(id, true)) cleared++;
        }

        var before = doc.Objects.Count;
        if (!doc.Import(path))
            throw new InvalidOperationException($"Failed to import: {path}");
        var imported = doc.Objects.Count - before;

        foreach (var view in doc.Views)
            view.ActiveViewport.ZoomExtents();

        doc.Views.Redraw();

        return JsonSerializer.Serialize(new
        {
            path,
            imported,
            cleared,
        });
    }
}