from __future__ import annotations

from collections.abc import AsyncGenerator

from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine

from cpv3.infrastructure.settings import get_settings


_settings = get_settings()
_engine = create_async_engine(
    _settings.get_database_url(),
    echo=_settings.debug,
    pool_pre_ping=True,
)

SessionLocal = async_sessionmaker(bind=_engine, class_=AsyncSession, expire_on_commit=False)


async def get_db() -> AsyncGenerator[AsyncSession, None]:
    async with SessionLocal() as session:
        yield session