"""Force SQLAlchemy pool sizing for a pool-comparison run.

WHY this exists: shopdb/config.py does not read pool size from the environment,
so a test container cannot be pointed at a different pool without a code change.
This patches Config.SQLALCHEMY_ENGINE_OPTIONS at import time, before create_app
builds the engine, purely so a bigger pool can be MEASURED before deciding
whether to make it permanent.

Not for production use. Mounted into a throwaway container as sitecustomize.py,
which Python imports automatically at startup.
"""
import os

from shopdb.config import Config

_size = int(os.environ.get('FORCE_POOL_SIZE', '5'))
_overflow = int(os.environ.get('FORCE_MAX_OVERFLOW', '10'))

_options = dict(Config.SQLALCHEMY_ENGINE_OPTIONS)
_options['pool_size'] = _size
_options['max_overflow'] = _overflow
Config.SQLALCHEMY_ENGINE_OPTIONS = _options