import contextlib

import pytest
from fastapi.testclient import TestClient

from app.config import Settings
from app.main import create_app
from helpers import TEST_SETTINGS


@pytest.fixture
def make_client():
    """Factory: ``make_client(**settings_overrides)`` returns a started TestClient."""
    with contextlib.ExitStack() as stack:
        def factory(**overrides):
            settings = Settings(**{**TEST_SETTINGS, **overrides})
            test_client = stack.enter_context(TestClient(create_app(settings)))
            # Websocket sessions are closed before the app stops (entered later, exited first).
            test_client.sockets = stack.enter_context(contextlib.ExitStack())
            return test_client
        yield factory


@pytest.fixture
def client(make_client):
    return make_client()