server.mjs

import { createServer } from "http";
import { createYoga, createSchema } from "graphql-yoga";
import { pies } from "./data.js";

const typeDefs = /* GraphQL */ `
  type Pie {
    id: ID!
    name: String!
    price: Float!
    inStock: Boolean!
    averageRating: Float
    category: String
  }

  type Pies {
    pies: [Pie!]!
    count: Int!
  }

  type Query {
    pies: [Pie!]!
    getPies(category: String): Pies!
  }
`;

const resolvers = {
  Query: {
    pies: () => pies,
    getPies: (_, { category }) => {
      const filteredPies = category
        ? pies.filter(pie => pie.category === category)
        : pies;

      return {
        pies: filteredPies,
        count: filteredPies.length
      };
    },
  },
};

const yoga = createYoga({
  schema: createSchema({ typeDefs, resolvers }),
  graphqlEndpoint: "/graphql",
});

const server = createServer(yoga);

server.listen(4000, () => {
  console.log("🚀 GraphQL ready at http://localhost:4000/graphql");
});