from __future__ import annotations

BLOCKED_AUTO_CREATE_ENVIRONMENTS = {"staging", "production"}


def normalize_environment(environment: str | None) -> str:
    return (environment or "development").strip().lower()


def assert_auto_create_schema_allowed(environment: str | None, enabled: bool) -> None:
    normalized = normalize_environment(environment)
    if enabled and normalized in BLOCKED_AUTO_CREATE_ENVIRONMENTS:
        raise RuntimeError(
            "AUTO_CREATE_SCHEMA is forbidden in staging/production. " "Run Alembic migrations before starting services."
        )