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

from app.core.config import settings

engine = create_engine(settings.DATABASE_URL,
                       pool_size=settings.DB_POOL_SIZE,
                       max_overflow=settings.DB_MAX_OVERFLOW,
                       pool_pre_ping=True)

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

Base = declarative_base()


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()