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

from app.core.config import settings

# Ensure DB directory exists
settings.DB_DIR.mkdir(parents=True, exist_ok=True)

# Create SQLAlchemy engine
engine = create_engine(
    settings.SQLALCHEMY_DATABASE_URL,
    connect_args={"check_same_thread": False}  # Only needed for SQLite
)

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

# Create base class for models
Base = declarative_base()

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