from typing import Generator

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

from app.core.config import SQLALCHEMY_DATABASE_URL

# Create SQLAlchemy engine
engine = create_engine(
    SQLALCHEMY_DATABASE_URL,
    connect_args={"check_same_thread": False},  # Needed for SQLite
)

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

# Create base class for models
Base = declarative_base()


def get_db() -> Generator[Session, None, None]:
    """Dependency to get database session."""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()