import { fileURLToPath } from 'url';
import { ApolloServer } from 'apollo-server-koa';
import graphqlUploadKoa from 'graphql-upload/public/graphqlUploadKoa.js';
import Koa from 'koa';
import makeDir from 'make-dir';
import UPLOAD_DIRECTORY_URL from './config/UPLOAD_DIRECTORY_URL.mjs';
import schema from './schema/index.mjs';

/**
 * Starts the API server.
 */
async function startServer() {
  // Ensure the upload directory exists.
  await makeDir(fileURLToPath(UPLOAD_DIRECTORY_URL));

  const apolloServer = new ApolloServer({ schema });

  await apolloServer.start();

  new Koa()
    .use(
      graphqlUploadKoa({
        // Limits here should be stricter than config for surrounding
        // infrastructure such as Nginx so errors can be handled elegantly by
        // `graphql-upload`:
        // https://github.com/jaydenseric/graphql-upload#type-processrequestoptions
        maxFileSize: 10000000, // 10 MB
        maxFiles: 20,
      })
    )
    .use(apolloServer.getMiddleware())
    .listen(process.env.PORT, (error) => {
      if (error) throw error;

      console.info(
        `Serving http://localhost:${process.env.PORT} for ${process.env.NODE_ENV}.`
      );
    });
}

startServer();