require_relative 'base_matcher'

module RSpec
  module GraphqlMatchers
    class AcceptArguments < BaseMatcher
      attr_reader :actual_field, :expected_args

      def initialize(expected_args)
        @expected_args = expected_args
      end

      def matches?(actual_field)
        @actual_field = actual_field

        @expected_args.all? do |arg_name, arg_type|
          matches_argument?(arg_name, arg_type)
        end
      end

      def failure_message
        "expected field '#{member_name(actual_field)}' to accept arguments "\
        "#{describe_arguments(expected_args)}"
      end

      def description
        "accept arguments #{describe_arguments(expected_args)}"
      end

      private

      def matches_argument?(arg_name, arg_type)
        camel_arg_name = GraphQL::Schema::Member::BuildType.camelize(arg_name.to_s)
        actual_arg = actual_field.arguments[arg_name.to_s]
        actual_arg ||= actual_field.arguments[camel_arg_name]

        actual_arg && types_match?(actual_arg.type, arg_type)
      end

      def describe_arguments(what_args)
        what_args.sort.map do |arg_name, arg_type|
          "#{arg_name}(#{arg_type})"
        end.join(', ')
      end
    end
  end
end