import 'zone.js/dist/zone-node';
import 'reflect-metadata';
import { renderModuleFactory } from '@angular/platform-server';
import { enableProdMode } from '@angular/core';

import * as express from 'express';
import { join } from 'path';
import { readFileSync } from 'fs';

// Faster server renders w/ Prod mode (dev mode never needed)
enableProdMode();

// Express server
const app = express();

const PORT = process.env.PORT || 4000;
const DIST_FOLDER = join(process.cwd(), 'dist');

// Our index.html we'll use as our template
const template = readFileSync(join(DIST_FOLDER, 'browser', 'index.html')).toString();

// * NOTE :: leave this as require() since this file is built Dynamically from webpack
const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main');

// Express Engine
import {ngExpressEngine, RenderOptions} from '@nguniversal/express-engine';
// Import module map for lazy loading
import { provideModuleMap } from '@nguniversal/module-map-ngfactory-loader';
import {REQUEST, RESPONSE} from "@nguniversal/express-engine/tokens";
import {isArray} from "util";

// Our Universal express-engine (found @ https://github.com/angular/universal/tree/master/modules/express-engine)
// app.engine('html', ngExpressEngine({
//   bootstrap: AppServerModuleNgFactory,
//   providers: [
//      { provide: 'request', useFactory: () => options.req, deps: [] },
//     provideModuleMap(LAZY_MODULE_MAP)
//   ]
// }));

// be able to get request and get domain from there

app.engine('html', (_, options: any, callback) => {
  const opts = {
    document: template,
    url: options.req.url,
    extraProviders: [
      provideModuleMap(LAZY_MODULE_MAP),
      {
        provide: REQUEST,
        useValue: options.req
      },
      {
        provide: RESPONSE,
        useValue: options.req.res,
      },
    ]
  };

  renderModuleFactory(AppServerModuleNgFactory, opts)
    .then(html => callback(null, html)
    );
});

app.set('view engine', 'html');
app.set('views', join(DIST_FOLDER, 'browser'));
// Allow frames from specific domains
app.use(function (req, res, next) {
  var XFRAME_WHITELIST = [ 'http://scoobydoo.di.uoa.gr/frames.html', 'http://scoobydoo.di.uoa.gr:5000/customize-layout', 'https://beta.admin.connect.openaire.eu/customize-layout','https://admin.connect.openaire.eu/customize-layout'  ];
  let referer:string;
  if(req.headers.referer){
    referer = isArray(req.headers.referer)?req.headers.referer[0]:req.headers.referer;
    referer = referer.split("?")[0];
  }
  if (  referer &&  XFRAME_WHITELIST.indexOf(referer) != -1 ) {
    // res.header('X-FRAME-OPTIONS', 'allow from ' +req.headers.referer);
  }else {
    res.header('X-FRAME-OPTIONS', 'SAMEORIGIN');
  }
  next();
});

/* - Example Express Rest API endpoints -
  app.get('/api/**', (req, res) => { });
*/

// Server static files from /browser
app.get('*.*', express.static(join(DIST_FOLDER, 'browser'), {
  maxAge: '1y'
}));

// ALl regular routes use the Universal engine
app.get('*', (req, res) => {
  res.render('index', { req });
});

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