Feature: Provider Registry Coverage Boost
  As a developer
  I want to cover remaining untested paths in the ProviderRegistry
  So that edge cases in provider selection and creation are verified

  @unit @providers @registry
  Scenario: Settings default provider is valid but not configured falls through to fallback
    Given a registry where settings default_provider is "openai" but only anthropic key is set
    And CLEVERAGENTS_DEFAULT_PROVIDER env var is cleared
    When I request the default provider type from the boost registry
    Then the boost result should be ProviderType ANTHROPIC
    # Covers lines 335-338: settings_default valid ProviderType but not_configured

  @unit @providers @registry
  Scenario: Azure deployment resolves from settings when model_id is None
    Given a registry with azure API key and deployment setting "my-azure-deploy"
    And the Azure LangChain client is stubbed for boost
    When I call _create_provider_llm for AZURE with model_id None via boost
    Then the stubbed Azure client deployment_name should be "my-azure-deploy"
    # Covers line 502: self._settings.azure_openai_deployment branch

  @unit @providers @registry
  Scenario: Azure deployment falls back to gpt-4o when settings deployment is also empty
    Given a registry with azure API key and no deployment setting
    And the Azure LangChain client is stubbed for boost
    When I call _create_provider_llm for AZURE with model_id None via boost
    Then the stubbed Azure client deployment_name should be "gpt-4o"
    # Covers line 503: final "gpt-4o" fallback

  @unit @providers @registry
  Scenario: Google create_ai_provider uses DEFAULT_MODELS when model_id is empty string
    Given a registry with google API key configured for boost
    When I create an AI provider for google with empty string model_id via boost
    Then the boost AI provider model_id should be "gemini-2.0-flash"
    # Covers line 620: DEFAULT_MODELS.get fallback in Google branch

  @unit @providers @registry
  Scenario: OpenRouter create_ai_provider raises error when API key is missing
    Given a registry with no API keys for boost
    When I try to create an AI provider for openrouter via boost
    Then a boost ValueError should be raised
    And the boost error message should contain "openrouter"
    And the boost error message should contain "not configured"
    # Covers lines 632-637: OpenRouter not-configured error path

  @unit @providers @registry
  Scenario: OpenRouter create_ai_provider uses DEFAULT_MODELS when model_id is empty string
    Given a registry with openrouter API key configured for boost
    When I create an AI provider for openrouter with empty string model_id via boost
    Then the boost AI provider model_id should be "anthropic/claude-sonnet-4-20250514"
    # Covers lines 643-644: DEFAULT_MODELS.get fallback in OpenRouter branch
