module Shoulda
  module Matchers
    module ActiveModel
      # @private
      module Helpers
        def pretty_error_messages(obj)
          obj.errors.map do |attribute, message|
            full_message = message.dup.inspect
            parenthetical_parts = []

            unless attribute.to_sym == :base
              parenthetical_parts << "attribute: #{attribute}"

              if obj.respond_to?(attribute)
                parenthetical_parts << "value: #{obj.__send__(attribute).inspect}"
              end
            end

            if parenthetical_parts.any?
              full_message << " (#{parenthetical_parts.join(', ')})"
            end

            "* " + full_message
          end.join("\n")
        end

        def default_error_message(type, options = {})
          model_name = options.delete(:model_name)
          attribute = options.delete(:attribute)
          instance = options.delete(:instance)

          RailsShim.generate_validation_message(
            instance,
            attribute.to_sym,
            type,
            model_name,
            options
          )
        end
      end
    end
  end
end