import GraphQL from 'graphql';
import { createSubqueryResolver } from '../resolvers.js';

const { GraphQLObjectType, GraphQLNonNull, GraphQLInt, GraphQLFloat } = GraphQL;

export const Rating = new GraphQLObjectType({
  name: 'Rating',
  description: `[Ratings](https://musicbrainz.org/doc/Rating_System) allow users
to rate MusicBrainz entities. User may assign a value between 1 and 5; these
values are then aggregated by the server to compute an average community rating
for the entity.`,
  fields: () => ({
    voteCount: {
      type: new GraphQLNonNull(GraphQLInt),
      description: 'The number of votes that have contributed to the rating.',
      resolve: (rating) => rating['votes-count'],
    },
    value: {
      type: GraphQLFloat,
      description: 'The average rating value based on the aggregated votes.',
    },
  }),
});

export const rating = {
  type: Rating,
  description: 'The rating users have given to this entity.',
  resolve: createSubqueryResolver({ inc: 'ratings' }),
};