import pytest

import app.dependencies as deps


@pytest.fixture(autouse=True)
def reset_state():
    """Isoliert den Singleton-Audio-Router (Loopback-Buffer) und Sessions je Test."""
    deps._audio_router = None
    deps.session_manager._sessions.clear()
    yield
    deps._audio_router = None
    deps.session_manager._sessions.clear()


def loopback_output():
    """Liefert den LoopbackOutput aus dem aktuellen Singleton-Router."""
    router = deps.get_audio_router()
    for endpoint in router.outputs:
        if type(endpoint).__name__ == "LoopbackOutput":
            return endpoint
    raise AssertionError("LoopbackOutput nicht gefunden")