from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from .config import settings

# SQLite needs `check_same_thread=False`; Postgres doesn't.
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(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()