const { ApolloServer } = require("apollo-server-cloudflare");
const {
  graphqlCloudflare,
} = require("apollo-server-cloudflare/dist/cloudflareApollo");

const KVCache = require("../kv-cache");
const SenpyAPI = require("../datasources/senpy");
const resolvers = require("../resolvers");
const typeDefs = require("../schema");

const dataSources = () => ({
  senpyAPI: new SenpyAPI(),
});

const kvCache = { cache: new KVCache() };

const createServer = (graphQLOptions) =>
  new ApolloServer({
    typeDefs,
    resolvers,
    introspection: true,
    dataSources,
    ...(graphQLOptions.kvCache ? kvCache : {}),
  });

const handler = async (request, graphQLOptions) => {
  const server = createServer(graphQLOptions);

  await server.start();

  return graphqlCloudflare(() => server.createGraphQLServerOptions(request))(
    request
  );
};

module.exports = handler;