module Bearcat
  class Client < Footrest::Client
    module OutcomeGroups

      def show_outcome_group(outcome_group_id, params={})
        get("#{outcomes_context_slug(params)}#{outcome_group_id}")
      end

      def update_outcome_group(outcome_group_id, params={})
        put("#{outcomes_context_slug(params)}#{outcome_group_id}", params)
      end

      def delete_outcome_group(outcome_group_id, params={})
        delete("#{outcomes_context_slug(params)}#{outcome_group_id}")
      end

      def list_linked_outcomes(outcome_group_id, params={})
        get("#{outcomes_context_slug(params)}#{outcome_group_id}/outcomes")
      end

      def create_outcome_in_group(outcome_group_id, params={})
        post("#{outcomes_context_slug(params)}#{outcome_group_id}/outcomes", params)
      end

      def link_outcome(outcome_group_id, outcome_id, params={})
        put("#{outcomes_context_slug(params)}#{outcome_group_id}/outcomes/#{outcome_id}")
      end

      def unlink_outcome(outcome_group_id, outcome_id, params={})
        delete("#{outcomes_context_slug(params)}#{outcome_group_id}/outcomes/#{outcome_id}")
      end

      def list_subgroups(outcome_group_id, params={})
        get("#{outcomes_context_slug(params)}#{outcome_group_id}/subgroups")
      end

      def create_subgroup(outcome_group_id, params={})
        post("#{outcomes_context_slug(params)}#{outcome_group_id}/subgroups", params)
      end

      def import_outcome_group(outcome_group_id, params={})
        post("#{outcomes_context_slug(params)}#{outcome_group_id}/import", params)
      end

      def outcomes_context_slug(params)
        context_hash = params.select { |k, _| k == "account" || k == "course" }

        if context_hash.keys.count > 1
          raise ArgumentError, "cannot have account and course in params"
        elsif context_hash.empty?
          return "#{config.prefix}#{global_slug}"
        else
          context_hash_key = context_hash.keys.first
          case context_hash_key
            when 'account'
              "#{config.prefix}#{account_slug(context_hash[context_hash_key])}"
            when 'course'
              "#{config.prefix}#{course_slug(context_hash[context_hash_key])}"
          end
        end
      end

      private
      def account_slug(account_id)
        "accounts/#{account_id}/outcome_groups/"
      end


      private
      def course_slug(course_id)
        "courses/#{course_id}/outcome_groups/"
      end

      private
      def global_slug
        "global/outcome_groups/"
      end

    end
  end
end