#!/usr/bin/env node

/**
 * Module dependencies.
 */

import app from './server/app.js';
import debug from 'debug';
debug('pathtoglory:server');
import http from 'http';
import rssGenerator from './server/rss/index.js';
import PostController from './server/controllers/Post.controller.js';
import OptionController from './server/controllers/Option.controller.js';

// Check needed options
Promise.all([
  OptionController.get('blog_name'),
  OptionController.get('blog_description'),
  `https://${process.env.RP_ID}/`,
  PostController.getAll()
])
  .then(([name, description, link, posts]) => {
    rssGenerator.setChannel(
      name || process.env.RP_NAME,
      description || '',
      link,
      posts[0] ? new Date(posts[0].updated_at) : new Date()
    );

    posts 
      .map(post => {
        return {
          title: post.title,
          description: post.content.slice(0, 255),
          link: `${link}/posts/${post.id}`,
        }
      })
      .forEach(post => {
        rssGenerator.addItem(post);
      });

    rssGenerator.generateFile();
  })
  .catch(err => {
    console.error(err);
  });

/**
 * Get port from environment and store in Express.
 */

var port = normalizePort(process.env.PORT);
app.set('port', port);
app.set('trust proxy', true);

/**
 * Create HTTP server.
 */
var server = http.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port);
server.on('error', onError);
server.on('listening', onListening);

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort(val) {
  var port = parseInt(val, 10);

  if (isNaN(port)) {
    // named pipe
    return val;
  }

  if (port >= 0) {
    // port number
    return port;
  }

  return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error) {
  if (error.syscall !== 'listen') {
    throw error;
  }

  var bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
      throw error;
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
  var addr = server.address();
  var bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port;
  debug('Listening on ' + bind);
}