import {
  ApolloError,
  ForbiddenError,
} from 'apollo-server-micro';
import { queryField, idArg } from '@nexus/schema';

import { authenticateQuery } from '../../../schema/authenticate-query';
import { UserType } from './index';
import { userService } from '../user.service';

/**
 * Resolver to Fetch a given user
 */

export const userQF = queryField('user', {
  type: UserType,
  args: { id: idArg({ required: true, description: 'Id of the user' }) },
  resolve: async (root, args, ctx, info) => {
    const { user, ability } = authenticateQuery(ctx, { requireUser: true });

    const requestedUser = await userService(ctx.state.db)
      .fetchUserById(args.id, { ability })
      .catch(err => {
        throw new ApolloError('Unknown Error');
      });

    if (requestedUser === null) {
      throw new ForbiddenError('You are not able to view this resource');
    }

    return requestedUser;
  },
});