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

from app.core.config import settings

# Create SQLAlchemy engine
engine = create_engine(settings.DATABASE_URL)

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

# Create base class for models
Base = declarative_base()

# Function to get database session
def get_db():
    """Dependency for getting DB session."""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

# Function to create all tables
def create_tables():
    """Create all tables in the database."""
    Base.metadata.create_all(bind=engine)