from pathlib import Path

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
Path(settings.DB_DIR).mkdir(parents=True, exist_ok=True)

engine = create_engine(
    settings.SQLALCHEMY_DATABASE_URL,
    connect_args={"check_same_thread": False}  # needed only for SQLite
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()


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