#!/usr/bin/env node

/**
 * Module dependencies.
 */

var app = require('../app');
var debug = require('debug')('node-api:server');

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

var port = normalizePort(process.env.PORT || '3000');

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

app.listen(port, function(token) {
  if (!token) {
    require('net').createServer().once('error', onError);
  }
  debug('Listening on port ' + port);
});

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

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

  if (isNaN(port)) {
    // named pipe: unsupported now
    return false;
  }

  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;
  }

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