"""Apply OBJ Mesh.Mesh patch to export.py - targeting only export_obj."""
with open("src/freecad_mcp/tools/export.py", "r") as f:
    content = f.read()

old = """    async def export_obj(
        file_path: str,
        object_names: list[str] | None = None,
        doc_name: str | None = None,
        mesh_tolerance: float = 0.1,
    ) -> dict[str, Any]:
        \"\"\"Export objects to OBJ format.

        OBJ (Wavefront) is a common 3D model format supported by many
        3D graphics applications and game engines.

        Args:\"\"\"
        bridge = await get_bridge()

        code = f\"\"\"
import Mesh

doc = FreeCAD.ActiveDocument if {doc_name!r} is None else FreeCAD.getDocument({doc_name!r})
if doc is None:
    raise ValueError(\"No document found\")
{_build_object_selection_code(object_names)}
# Create mesh from shapes
meshes = []
for obj in objects:
    mesh = Mesh.Mesh()
    mesh.addFacets(obj.Shape.tessellate({mesh_tolerance})[0])
    meshes.append(mesh)"""

new = """    async def export_obj(
        file_path: str,
        object_names: list[str] | None = None,
        doc_name: str | None = None,
        mesh_tolerance: float = 0.1,
    ) -> dict[str, Any]:
        \"\"\"Export objects to OBJ format.

        OBJ (Wavefront) is a common 3D model format supported by many
        3D graphics applications and game engines.

        Args:\"\"\"
        bridge = await get_bridge()

        code = f\"\"\"
import Mesh

doc = FreeCAD.ActiveDocument if {doc_name!r} is None else FreeCAD.getDocument({doc_name!r})
if doc is None:
    raise ValueError(\"No document found\")
{_build_object_selection_code(object_names)}
# Create mesh from shapes (FC 1.1.1: Mesh.Mesh(shape.tessellate()) instead of addFacets)
meshes = []
for obj in objects:
    mesh = Mesh.Mesh(obj.Shape.tessellate({mesh_tolerance}))
    meshes.append(mesh)"""

count = content.count(old)
print(f"OBJ: found {count} occurrences")
if count == 1:
    content = content.replace(old, new)
    with open("src/freecad_mcp/tools/export.py", "w") as f:
        f.write(content)
    print("OBJ patch applied")
else:
    print("Not unique - need manual edit")