import socket

_ext_socket = None
_ext_ip = "127.0.0.1"
_ext_port = 9124
_ext_enabled = False


def get_extension_socket():
    global _ext_socket

    if _ext_socket is None:
        _ext_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

    return _ext_socket


def set_extension_target(ip=None, port=None):
    global _ext_socket, _ext_ip, _ext_port

    if ip is not None:
        _ext_ip = ip

    if port is not None:
        _ext_port = port

    _ext_socket = None


def set_extension_enabled(enabled):
    global _ext_enabled
    _ext_enabled = enabled


def is_extension_enabled():
    return _ext_enabled


def send_to_extension(value):
    """Sends a plain numeric delta to extension-reaper-macos over UDP.
    No-op (kill switch) unless set_extension_enabled(True) has been called."""
    if not _ext_enabled:
        return
    try:
        get_extension_socket().sendto(str(value).encode(), (_ext_ip, _ext_port))
    except Exception as e:
        print(f"[Extension send] Error: {e}")