#!/usr/bin/env node

/**
 * Load configuration from .env
 */
require('dotenv').config()

// Check if the .env config file is included.
const required_variables = [
  process.env.MONGODB_CONN_STRING,
  process.env.ADMIN_USER,
  process.env.ADMIN_PASS,
  process.env.NAME,
  process.env.HOST,
  process.env.API_KEY,
  process.env.SESSION_KEY
]
for (let variable of required_variables) {
  if (variable === undefined) {
    console.error("ERROR: Configuration error! You are either missing a .env file or have not properly configured all " +
        "required environment variables.\n" +
        "Depending on your environment, this may require copying .env.example to .env and modifying the configuration " +
        "file or defining the missing environment variables (see the .env.example file)." +
        "\nExiting...")
    process.exit(1)
  }
}



/**
 * Module dependencies.
 */

const app = require('../app').app;
const debug = require('debug')('technicflux:server');
const http = require('http');
const database = require('../database/database')

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

let port = normalizePort(process.env.PORT || '80');
app.set('port', port);

/**
 * Create HTTP server.
 */

let server = http.createServer(app);

/**
 * Connect to the Database
 */
database.connectToDB(process.env.MONGODB_CONN_STRING)

/**
 * 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);
}