module Fizzy
  module Api
    class CalculateOutcome < ActiveInteraction::Base
      string :dossier_id
      string :protocol_subscription_id

      def execute
        response = Api.basic_auth_session.post("/dossier/#{dossier_id}"\
                                               "/protocol_subscriptions/#{protocol_subscription_id}"\
                                               '/calculate')
        process_response(response)
      end

      private

      def process_response(response)
        case response.code
        when 200
          response
        else
          invalid_response(response)
        end
      end

      def invalid_response(response)
        case response.code
        when 202
          raise Errors::OutcomeNotAvailableError, response.body || 'The results are currently being calculated.'
        when 404
          raise Errors::GraphNotFoundError, response.body || 'Participant not found, or graph not supported.'
        else
          raise Errors::UnexpectedStatusError, "Status code #{response.code} not expected."
        end
      end
    end
  end
end