import { inputObjectType, mutationField, arg, objectType } from '@nexus/schema';
import { AuthenticationError } from 'apollo-server-micro';

import { generateJWT } from '../../../server/authentication/authenticate';
import { User } from '../../../app/user';

export const SessionType = objectType({
  name: 'Session',
  definition: t => {
    t.string('token');
  },
});

export const LoginUserIputType = inputObjectType({
  name: 'LoginUserInput',
  definition(t) {
    t.string('email', { required: true });
    t.string('password', { required: true });
  },
});

/**
 * Fetch a single Recipe
 */

export const loginUserMF = mutationField('login', {
  type: 'Session',
  args: {
    input: arg({ type: LoginUserIputType }),
  },
  resolve: async (root, args, ctx, info) => {
    const { email, password } = args.input;

    const user = await User.findOne({ email });

    if (!user || !user.isValidPassword(password)) {
      throw new AuthenticationError(
        'Incorrect username / passowrd combination'
      );
    }
    const token = await generateJWT(user);

    return { token };
  },
});