/*
 Copyright (C) 2017  Cloudbase Solutions SRL

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License as
 published by the Free Software Foundation, either version 3 of the
 License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


import 'babel-polyfill';
import path from 'path';
import express from 'express';
import cookieParser from 'cookie-parser';
import bodyParser from 'body-parser';
import ReactDOM from 'react-dom/server';
import PrettyError from 'pretty-error';
import Router from './routes';
import assets from './assets';
import { port, analytics } from './config';

const server = global.server = express();

//
// Tell any CSS tooling (such as Material UI) to use all vendor prefixes if the
// user agent is not known.
// -----------------------------------------------------------------------------
global.navigator = global.navigator || {};
global.navigator.userAgent = global.navigator.userAgent || 'all';

//
// Register Node.js middleware
// -----------------------------------------------------------------------------
server.use(express.static(path.join(__dirname, 'public')));
server.use(cookieParser());
server.use(bodyParser.urlencoded({ extended: true }));
server.use(bodyParser.json());

server.post('/federation', async (req, res) => {
  let token = req.body.token
  if (token) {
    res.redirect('/federate/' + token);
  } else {
    res.redirect('/login');
  }
});

//
// Register server-side rendering middleware
// -----------------------------------------------------------------------------
server.get('*', async (req, res, next) => {
  try {
    let statusCode = 200;
    const template = require('./views/index.jade');
    const data = { title: '', description: '', css: '', body: '', entry: assets.main.js };

    if (process.env.NODE_ENV === 'production') {
      data.trackingId = analytics.google.trackingId;
    }

    const css = [];
    const context = {
      insertCss: styles => css.push(styles._getCss()),
      onSetTitle: value => (data.title = value),
      onSetMeta: (key, value) => (data[key] = value),
      onPageNotFound: () => (statusCode = 404),
    };

    await Router.dispatch({ path: req.path, query: req.query, context }, (state, component) => {
      data.body = ReactDOM.renderToString(component);
      data.css = css.join('');
    });

    res.status(statusCode);
    res.send(template(data));
  } catch (err) {
    next(err);
  }
});

//
// Error handling
// -----------------------------------------------------------------------------
const pe = new PrettyError();
pe.skipNodeFiles();
pe.skipPackage('express');

server.use((err, req, res, next) => { // eslint-disable-line no-unused-vars
  console.log(pe.render(err)); // eslint-disable-line no-console
  const template = require('./views/error.jade');
  const statusCode = err.status || 500;
  res.status(statusCode);
  res.send(template({
    message: err.message,
    stack: process.env.NODE_ENV === 'production' ? '' : err.stack,
  }));
});

//
// Launch the server
// -----------------------------------------------------------------------------
server.listen(port, () => {
  /* eslint-disable no-console */
  console.log(`The server is running at http://localhost:${port}/`);
});