"""Database setup: engine, session factory, and base model."""

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

DATABASE_URL = "sqlite:///bestof.db"

engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)


class Base(DeclarativeBase):
    pass


def get_db():
    """FastAPI dependency that yields a database session."""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()