"""Database connection and session management."""

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, DeclarativeBase
from app.core.config import settings

# Create engine
engine = create_engine(
    settings.DATABASE_URL,
    connect_args={"check_same_thread": False} if "sqlite" in settings.DATABASE_URL else {},
)

# Create session factory
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)


class Base(DeclarativeBase):
    """SQLAlchemy declarative base class."""
    pass


def get_db():
    """Dependency to get database session."""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()