import 'zone.js/dist/zone-node';

import { ngExpressEngine } from '@nguniversal/express-engine';
import * as express from 'express';
import { join } from 'path';

import { AppServerModule } from './src/main.server';
import { APP_BASE_HREF } from '@angular/common';

// The Express app is exported so that it can be used by serverless Functions.
export function app() {
  const server = express();
  const distFolder = join(process.cwd(), 'dist/express-engine-ivy/browser');

  // #docregion ngExpressEngine
  server.engine('html', ngExpressEngine({
    bootstrap: AppServerModule,
  }));
  // #enddocregion ngExpressEngine
  server.set('view engine', 'html');
  server.set('views', distFolder);

  // #docregion data-request
  // TODO: implement data requests securely
  server.get('/api/*', (req, res) => {
    res.status(404).send('data requests are not supported');
  });
  // #enddocregion data-request

  // #docregion static
  // Serve static files from /browser
  server.get('*.*', express.static(distFolder, {
    maxAge: '1y'
  }));
  // #enddocregion static

  // #docregion navigation-request
  // All regular routes use the Universal engine
  server.get('*', (req, res) => {
    res.render('index', { req, providers: [{ provide: APP_BASE_HREF, useValue: req.baseUrl }] });
  });
  // #enddocregion navigation-request

  return server;
}

function run() {
  const port = process.env.PORT || 4000;

  // Start up the Node server
  const server = app();
  server.listen(port, () => {
    console.log(`Node Express server listening on http://localhost:${port}`);
  });
}

// Webpack will replace 'require' with '__webpack_require__'
// '__non_webpack_require__' is a proxy to Node 'require'
// The below code is to ensure that the server is run only when not requiring the bundle.
declare const __non_webpack_require__: NodeRequire;
const mainModule = __non_webpack_require__.main;
if (mainModule && mainModule.filename === __filename) {
  run();
}

export * from './src/main.server';