from __future__ import annotations

from sqlalchemy import create_engine
from sqlalchemy.engine import Engine
from sqlalchemy.orm import sessionmaker, Session

from app.core.config import settings


def create_postgres_engine() -> Engine:
    return create_engine(
        settings.postgres_connection_url,
        pool_pre_ping=True,
        pool_recycle=1800,
        pool_size=5,
        max_overflow=10,
        future=True,
    )


def create_session_factory(engine: Engine) -> sessionmaker[Session]:
    return sessionmaker(
        bind=engine,
        autoflush=False,
        autocommit=False,
        expire_on_commit=False,
    )