from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, Session
from typing import Generator

from .config import get_settings
from .models import Base

settings = get_settings()

engine = create_engine(settings.database_url, pool_pre_ping=True)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)


def init_db():
    """Create all tables"""
    Base.metadata.create_all(bind=engine)


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