import psutil

try:
    import win32gui
    import win32process
except ImportError:
    win32gui = None
    win32process = None

KNOWN_GAMES = {
    "VALORANT-Win64-Shipping.exe": "valorant",
    "League of Legends.exe": "league_of_legends",
    "csgo.exe": "csgo",
    "RainbowSix.exe": "rainbow_six_siege",
    "Overwatch.exe": "overwatch",
    "Apex.exe": "apex_legends"
}

def detect_active_game() -> str | None:
    if not win32gui or not win32process:
        return None
    try:
        hwnd = win32gui.GetForegroundWindow()
        if not hwnd:
            return None
        _, pid = win32process.GetWindowThreadProcessId(hwnd)
        proc = psutil.Process(pid)
        exe_name = proc.name()
        return KNOWN_GAMES.get(exe_name)
    except (psutil.NoSuchProcess, psutil.AccessDenied):
        return None
    except Exception:
        return None