from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, declarative_base
from config import settings

engine = create_engine(
    settings.DATABASE_URL,
    connect_args={"check_same_thread": False} if "sqlite" in settings.DATABASE_URL else {},
    pool_pre_ping=True,
    pool_size=5,       # Max 5 permanent connections
    max_overflow=0,    # Don't allow extra temporary connections
    pool_timeout=30
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()


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