#!/usr/bin/env node

const app = require('../app')
const http = require('http')

const port = normalizePort(process.env.PORT || '3000')
const server = http.createServer(app)

server.listen(port)
server.on('error', error => onError(error, port))
server.on('listening', _ => onListening(server))

function normalizePort (val) {
  const port = parseInt(val, 10)

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

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

  return false
}

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

  const 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
  }
}

function onListening (server) {
  const addr = server.address()
  if (typeof addr === 'string') {
    console.log(`Listening on pipe ${addr}`)
  } else {
    console.log(`Listening on http://localhost:${addr.port}/`)
  }
}