#!/usr/bin/env node

/**
 * Module dependencies.
 */

var app = require('../app');
var debug = require('debug')('forumforum:httpServer');
var http = require('http');

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

var port_public = normalizePort(process.env.PORT || '80');
app.set('port_public', port_public);

/**
 * Create HTTP httpServer.
 */

var httpServer = http.createServer(app);

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

httpServer.listen(port_public);
httpServer.on('error', onError);
httpServer.on('listening', onListening);

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

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

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

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

  return false;
}

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

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

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

  // 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 httpServer "listening" event.
 */

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