from typing import Generator

import pytest
from fastapi.testclient import TestClient

from app.database import Base
from app.database import SessionLocal
from app.database import async_engine
from app.database import async_session
from app.database import engine
from app.main import app


@pytest.fixture
async def async_db_session():
    async with async_session() as session:
        async with async_engine.begin() as conn:
            await conn.run_sync(Base.metadata.create_all)
        yield session
        async with async_engine.begin() as conn:
            await conn.run_sync(Base.metadata.drop_all)


@pytest.fixture
def db() -> Generator:
    Base.metadata.create_all(bind=engine)
    try:
        yield SessionLocal()
    finally:
        try:
            Base.metadata.drop_all(bind=engine)
        except Exception:
            # XXX: for some reason, the teardown occasionally fails because of this
            pass


@pytest.fixture
def exclude_fastapi_middleware():
    """Workaround for https://github.com/encode/starlette/issues/472"""
    user_middleware = app.user_middleware.copy()
    app.user_middleware = []
    app.middleware_stack = app.build_middleware_stack()
    yield
    app.user_middleware = user_middleware
    app.middleware_stack = app.build_middleware_stack()


@pytest.fixture
def client(db, exclude_fastapi_middleware) -> Generator:
    # app.dependency_overrides[get_db] = _get_db_for_testing
    with TestClient(app) as c:
        yield c