module Elasticsearch
  module Rails
    module Instrumentation
      module Publishers

        # Wraps the `SearchRequest` methods to perform the instrumentation
        #
        # @see SearchRequest#execute_with_instrumentation!
        # @see http://api.rubyonrails.org/classes/ActiveSupport/Notifications.html
        #
        module SearchRequest

          def self.included(base)
            base.class_eval do
              alias_method :execute_without_instrumentation!, :execute!

              def execute!
                execute_with_instrumentation!
              end

              # Wrap `Search#execute!` and perform instrumentation
              #
              def execute_with_instrumentation!
                ActiveSupport::Notifications.instrument "search.elasticsearch",
                  name:   'Search',
                  klass:  (self.klass.is_a?(Elasticsearch::Model::Proxy::ClassMethodsProxy) ? self.klass.target.to_s : self.klass.to_s),
                  search: self.definition do
                  execute_without_instrumentation!
                end
              end
            end
          end

        end
      end
    end
  end
end