"""Windows: reliably reading a browser's address-bar URL needs UI Automation
(pywinauto/uiautomation). We attempt a lightweight UIA read if available and
otherwise return None, letting the detector fall back to visual address-bar
reading from the screenshot.
"""
from typing import Optional


def get_active_tab_url() -> Optional[str]:
    try:
        import uiautomation as auto  # optional dependency
    except Exception:
        return None
    try:
        window = auto.GetForegroundControl()
        # Chromium/Firefox expose the address bar as an Edit control named
        # "Address and search bar" / "Search or enter address".
        edit = window.EditControl(searchDepth=12)
        if edit.Exists(0.3):
            val = (edit.GetValuePattern().Value or "").strip()
            return val or None
    except Exception:
        return None
    return None