database

"""
Database configuration using SQLAlchemy.
"""

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

# Database URL from settings
SQLALCHEMY_DATABASE_URL = settings.DATABASE_URL

# Create engine (use check_same_thread=False for SQLite)
if "sqlite" in SQLALCHEMY_DATABASE_URL:
    engine = create_engine(
        SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
    )
else:
    engine = create_engine(SQLALCHEMY_DATABASE_URL)

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

# Base class for models
Base = declarative_base()


def get_db():
    """
    Dependency that provides a database session.
    
    Usage in FastAPI:
        @app.get("/items")
        def get_items(db: Session = Depends(get_db)):
            return db.query(Item).all()
    """
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()