from collections.abc import Generator

from sqlalchemy import create_engine
from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker

from app.core.config import get_settings


class Base(DeclarativeBase):
    pass


settings = get_settings()
connect_args = {"check_same_thread": False} if settings.database_url.startswith("sqlite") else {}
engine = create_engine(settings.database_url, pool_pre_ping=True, connect_args=connect_args)
SessionLocal = sessionmaker(bind=engine, autocommit=False, autoflush=False)


def get_db() -> Generator[Session, None, None]:
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()