from app.config import Settings, get_settings


def test_configuration_sections_are_loaded_from_env(monkeypatch) -> None:
    monkeypatch.setenv("G2S_CONTROLLER__API_PREFIX", "/internal/v1")
    monkeypatch.setenv("G2S_SERVICE__MAX_PARALLEL_PROVIDERS", "12")
    monkeypatch.setenv("G2S_BUSINESS_LOGIC__WEIGHT_ROUND_SCALE", "3")
    monkeypatch.setenv("G2S_REPOSITORY__PRICE_CACHE_TTL_SECONDS", "1200")
    monkeypatch.setenv("G2S_ADAPTER__CDEK_BASE_URL", "https://sandbox.cdek.test")
    monkeypatch.setenv("G2S_ADAPTER__CDEK_CLIENT_ID", "env-client-id")
    monkeypatch.setenv("G2S_ADAPTER__CDEK_CLIENT_SECRET", "env-client-secret")
    monkeypatch.setenv("G2S_ADAPTER__CDEK_RETRY_ATTEMPTS", "4")
    monkeypatch.setenv("G2S_ADAPTER__CDEK_RETRY_BACKOFF_SECONDS", "0.7")
    monkeypatch.setenv("G2S_ADAPTER__CDEK_TIMEOUT_SECONDS", "8.5")
    monkeypatch.setenv("G2S_ADAPTER__CDEK_CACHE_TTL_SECONDS", "780")
    monkeypatch.setenv("G2S_OBSERVABILITY__SERVICE_NAME", "g2s-test")
    monkeypatch.setenv("G2S_ALERTS__TELEGRAM_ENABLED", "true")

    settings = Settings()

    assert settings.controller.api_prefix == "/internal/v1"
    assert settings.service.max_parallel_providers == 12
    assert settings.business_logic.weight_round_scale == 3
    assert settings.repository.price_cache_ttl_seconds == 1200
    assert settings.adapter.cdek_base_url == "https://sandbox.cdek.test"
    assert settings.adapter.cdek_client_id == "env-client-id"
    assert settings.adapter.cdek_client_secret == "env-client-secret"
    assert settings.adapter.cdek_retry_attempts == 4
    assert settings.adapter.cdek_retry_backoff_seconds == 0.7
    assert settings.adapter.cdek_timeout_seconds == 8.5
    assert settings.adapter.cdek_cache_ttl_seconds == 780
    assert settings.observability.service_name == "g2s-test"
    assert settings.alerts.telegram_enabled is True


def test_configuration_sections_are_loaded_from_yaml_file(tmp_path, monkeypatch) -> None:
    config_file = tmp_path / "config.yaml"
    config_file.write_text(
        """
controller:
  api_prefix: "/yaml/v1"
service:
  max_parallel_providers: 11
business_logic:
  weight_round_scale: 4
repository:
  price_cache_ttl_seconds: 600
adapter:
  cdek_base_url: "https://yaml.cdek.test"
  cdek_client_id: "yaml-client-id"
  cdek_client_secret: "yaml-client-secret"
  cdek_retry_attempts: 5
  cdek_retry_backoff_seconds: 0.4
  cdek_timeout_seconds: 9.5
  cdek_cache_ttl_seconds: 810
observability:
  service_name: "g2s-yaml"
alerts:
  telegram_enabled: true
""".strip(),
        encoding="utf-8",
    )
    monkeypatch.setenv("G2S_CONFIG_FILE", str(config_file))

    settings = Settings()

    assert settings.controller.api_prefix == "/yaml/v1"
    assert settings.service.max_parallel_providers == 11
    assert settings.business_logic.weight_round_scale == 4
    assert settings.repository.price_cache_ttl_seconds == 600
    assert settings.adapter.cdek_base_url == "https://yaml.cdek.test"
    assert settings.adapter.cdek_client_id == "yaml-client-id"
    assert settings.adapter.cdek_client_secret == "yaml-client-secret"
    assert settings.adapter.cdek_retry_attempts == 5
    assert settings.adapter.cdek_retry_backoff_seconds == 0.4
    assert settings.adapter.cdek_timeout_seconds == 9.5
    assert settings.adapter.cdek_cache_ttl_seconds == 810
    assert settings.observability.service_name == "g2s-yaml"
    assert settings.alerts.telegram_enabled is True


def test_get_settings_returns_cached_instance(monkeypatch) -> None:
    get_settings.cache_clear()
    monkeypatch.setenv("G2S_SERVICE__PROVIDER_TIMEOUT_SECONDS", "22")

    first = get_settings()
    second = get_settings()

    assert first is second
    assert first.service.provider_timeout_seconds == 22

    get_settings.cache_clear()