require_relative '../../clients/google_client'
require_relative './base_config'

module ActiveGenie
  module Configuration::Providers
    # Configuration class for the Google Generative Language API client.
    # Manages API keys, URLs, model selections, and client instantiation.
    class GoogleConfig < BaseConfig
      NAME = :google

      # Retrieves the API key.
      # Falls back to the GENERATIVE_LANGUAGE_GOOGLE_API_KEY environment variable if not set.
      # @return [String, nil] The API key.
      def api_key
        @api_key || ENV['GENERATIVE_LANGUAGE_GOOGLE_API_KEY'] || ENV['GEMINI_API_KEY']
      end

      # Retrieves the base API URL for Google Generative Language API.
      # Defaults to 'https://generativelanguage.googleapis.com'.
      # @return [String] The API base URL.
      def api_url
        # Note: Google Generative Language API uses a specific path structure like /v1beta/models/{model}:generateContent
        # The base URL here should be just the domain part.
        @api_url || 'https://generativelanguage.googleapis.com'
      end

      # Lazily initializes and returns an instance of the GoogleClient.
      # Passes itself (the config object) to the client's constructor.
      # @return [ActiveGenie::Clients::GoogleClient] The client instance.
      def client
        @client ||= ::ActiveGenie::Clients::GoogleClient.new(self)
      end

      # Retrieves the model name designated for the lower tier (e.g., cost-effective, faster).
      # Defaults to 'gemini-2.0-flash-lite'.
      # @return [String] The lower tier model name.
      def lower_tier_model
        @lower_tier_model || 'gemini-2.0-flash-lite'
      end

      # Retrieves the model name designated for the middle tier (e.g., balanced performance).
      # Defaults to 'gemini-2.0-flash'.
      # @return [String] The middle tier model name.
      def middle_tier_model
        @middle_tier_model || 'gemini-2.0-flash'
      end

      # Retrieves the model name designated for the upper tier (e.g., most capable).
      # Defaults to 'gemini-2.5-pro-experimental'.
      # @return [String] The upper tier model name.
      def upper_tier_model
        @upper_tier_model || 'gemini-2.5-pro-experimental'
      end
    end
  end
end