"""Hotkey-Listener — plattformspezifische Backends hinter gemeinsamem Interface."""

import sys
from typing import Callable, Coroutine, Protocol, runtime_checkable

AsyncCallback = Callable[[], Coroutine]


@runtime_checkable
class HotkeyListener(Protocol):
    on_press: AsyncCallback | None
    on_release: AsyncCallback | None

    async def listen(self) -> None: ...


def create_listener(key_name: str = "KEY_F12") -> HotkeyListener:
    """Erstellt den plattformspezifischen HotkeyListener."""
    if sys.platform == "linux":
        from whisper_local.hotkey._evdev import EvdevHotkeyListener
        return EvdevHotkeyListener(key_name)
    else:
        from whisper_local.hotkey._pynput import PynputHotkeyListener
        return PynputHotkeyListener(key_name)