from collections.abc import Generator

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, DeclarativeBase, Session

from app.core.settings import get_settings


class Base(DeclarativeBase):
	pass


settings = get_settings()
engine = create_engine(
    settings.mysql_dsn,
    echo=settings.sqlalchemy_echo,
    pool_pre_ping=True,
    pool_recycle=3600,
    pool_size=settings.db_pool_size,
    max_overflow=settings.db_max_overflow,
    pool_timeout=settings.db_pool_timeout,
)
SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False, expire_on_commit=False)


def get_db() -> Generator[Session, None, None]:
	db = SessionLocal()
	try:
		yield db
	finally:
		db.close()