"""Settings 字段数量守卫：防止 env 反弹为巨型配置。"""

from app.core.config import Settings

ALLOWLIST_MAX_FIELDS = 22

EXPECTED_PREFIXES = (
    "database_",
    "redis_",
    "celery_",
    "app_",
    "secret_",
    "deepseek_",
    "zhipu_",
    "tencent_secret_",
    "wechat_pay_",
    "alipay_",
    "liblib_",
    "internal_eval_",
)


def test_settings_field_count_within_allowlist() -> None:
    assert len(Settings.model_fields) <= ALLOWLIST_MAX_FIELDS


def test_settings_has_only_secrets_and_bootstrap_fields() -> None:
    for name in Settings.model_fields:
        assert name.startswith(EXPECTED_PREFIXES), (
            f"unexpected Settings field {name!r}; "
            "non-secret deploy/product config belongs in config/*.toml"
        )


def test_settings_has_no_product_tuning_field_names() -> None:
    blocked = (
        "chat_",
        "memory_",
        "eval_",
        "story_",
        "memoir_",
        "agent_log_",
        "enable_",
        "otel_",
        "log_",
        "access_",
        "refresh_",
        "mock_",
        "tencent_sms_",
        "tencent_cos_",
        "api_cors_",
        "alembic_",
    )
    for name in Settings.model_fields:
        assert not any(name.startswith(p) for p in blocked)