"""Tests for transcription.config — settings loading, provider defaults, and paths."""

from transcription.config import Provider, Settings


class TestSettingsLoading:
    """Verify Settings construction and required-field validation."""

    def test_loads_from_env(self):
        """Settings constructs when OPENROUTER_API_KEY is provided."""

    def test_requires_api_key(self):
        """Settings raises ValidationError when OPENROUTER_API_KEY is missing."""


class TestProviderSettings:
    """Verify provider enum defaults and validation."""

    def test_defaults_to_openrouter(self):
        """Default provider is openrouter when not explicitly set."""

    def test_rejects_invalid_value(self):
        """Setting PROVIDER to an invalid value raises ValidationError."""

    def test_optional_fields_default_to_none(self):
        """provider_model, openrouter_http_referer, and openrouter_app_title are None when unset."""


class TestPathSettings:
    """Verify filesystem path field types."""

    def test_path_fields_are_path_objects(self):
        """upload_dir and prompt_dir are Path instances."""