"""
Database configuration module
"""
from pathlib import Path

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

# Create database directory if it doesn't exist
DB_DIR = Path("/app") / "storage" / "db"
DB_DIR.mkdir(parents=True, exist_ok=True)

SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_DIR}/db.sqlite"

engine = create_engine(
    SQLALCHEMY_DATABASE_URL,
    connect_args={"check_same_thread": False}
)

SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()


def get_db():
    """
    Dependency for getting a database session
    """
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


def create_db_and_tables():
    """
    Create database tables from SQLAlchemy models
    """
    Base.metadata.create_all(bind=engine)