"""
SaveUtils FreeCAD Addon - InitGui.py

FreeCAD runs Init.py/InitGui.py with `globals` and `locals` as two different
dicts. Top-level statements bind into locals, but functions defined here capture
globals as their `__globals__` — so *nothing* bound at the top of this file is
visible from inside a function here. Names FreeCAD already put in `__main__`
(FreeCAD, FreeCADGui) do resolve, which makes the trap easy to miss.

Consequence: every function below must import what it needs locally, and the
real work lives in SaveUtils.py where module globals behave normally.
"""

import FreeCAD
import FreeCADGui

FreeCAD.Console.PrintLog("=== SaveUtils: InitGui.py loading ===\n")


class SaveUtilsWorkbench(FreeCADGui.Workbench):
    MenuText = "SaveUtils"
    ToolTip = "Save utility commands"

    def Initialize(self):
        pass

    def Activated(self):
        pass

    def Deactivated(self):
        pass


FreeCADGui.addWorkbench(SaveUtilsWorkbench())


def _on_workbench_activated(name):
    # Local imports only — see the module docstring.
    import FreeCAD
    from PySide import QtCore

    # NoneWorkbench fires before the UI is ready — skip it
    if name == "NoneWorkbench":
        return

    try:
        import SaveUtils

        # FreeCAD rebuilds the menu bar around this signal, so right now some of
        # the QMenus it hands out are Python wrappers whose C++ half has already
        # been destroyed. Let the event loop come back round before touching
        # them. install_safely() is idempotent, so running it again on later
        # workbench switches is harmless and re-adds the items if a rebuild
        # dropped them.
        QtCore.QTimer.singleShot(0, SaveUtils.install_safely)
    except Exception as exc:
        FreeCAD.Console.PrintError(f"=== SaveUtils install error: {exc} ===\n")


FreeCADGui.getMainWindow().workbenchActivated.connect(_on_workbench_activated)