"""Unit-тесты настроек `src/core/config.py` (spec «Старт с минимальным окружением»; R-35)."""

from collections.abc import Callable

import pytest
from pydantic import ValidationError

from src.core.config import Settings

SettingsFactory = Callable[..., Settings]


def test_minimal_environment_gives_defaults(minimal_settings: SettingsFactory) -> None:
    settings = minimal_settings()

    assert settings.DEBUG is True
    assert settings.OPENBAO.MINIO.MINIO_BUCKET == "arm-ka"
    assert settings.OPENBAO.NATS.NATS_URL == "nats://localhost:4222"
    assert settings.OPENBAO.NATS.NATS_SEED == ""
    assert settings.OPENBAO.NATS.NATS_JWT == ""
    assert settings.NATS_ENABLED is True
    assert settings.SERVICE_NAME == "tabular-parser"
    assert settings.WORKER_CONCURRENCY == 1
    assert settings.PUBLISH_RETRIES == 3  # noqa: PLR2004 - значение по умолчанию из spec
    assert settings.DONE_CACHE_SIZE == 1000  # noqa: PLR2004 - значение по умолчанию из spec
    assert settings.PARSE_MAX_BYTES == 50 * 1024 * 1024  # design D-8: 50 МиБ
    assert settings.PARSE_TIMEOUT_SECONDS == 120  # noqa: PLR2004 - значение по умолчанию из design D-8


def test_parse_limits_must_be_positive(minimal_settings: SettingsFactory) -> None:
    with pytest.raises(ValidationError, match="PARSE_MAX_BYTES"):
        minimal_settings("PARSE_MAX_BYTES=0\n")
    with pytest.raises(ValidationError, match="PARSE_TIMEOUT_SECONDS"):
        minimal_settings("PARSE_TIMEOUT_SECONDS=0\n")


def test_publish_retries_zero_is_allowed(minimal_settings: SettingsFactory) -> None:
    """0 — без повторов: одна попытка публикации (NatsConnection принимает publish_retries ≥ 0)."""
    assert minimal_settings("PUBLISH_RETRIES=0\n").PUBLISH_RETRIES == 0


def test_publish_retries_negative_is_rejected(minimal_settings: SettingsFactory) -> None:
    with pytest.raises(ValidationError, match="PUBLISH_RETRIES"):
        minimal_settings("PUBLISH_RETRIES=-1\n")


def test_service_name_other_than_contract_value_is_rejected(minimal_settings: SettingsFactory) -> None:
    """SERVICE_NAME — `service.name` конвертов контракта: другое значение — ошибка конфигурации при старте."""
    with pytest.raises(ValidationError, match="SERVICE_NAME"):
        minimal_settings("SERVICE_NAME=scan-gateway\n")