const yargs = require('yargs');
var fs = require('fs');

/* Define configuration parameter */
yargs.alias('c', 'config').describe('c', 'olympus.json config location').string('rp');
args = yargs.argv;

console.log('\x1b[36m%s\x1b[0m', "*********************************************************************");
console.log('\x1b[36m%s\x1b[0m', "*  _____   _____  _____    ____  _                                  *");
console.log('\x1b[36m%s\x1b[0m', "* |  __ \\ / ____|/ ____|  / __ \\| |                                 *");
console.log('\x1b[36m%s\x1b[0m', "* | |  | | |    | (___   | |  | | |_   _ _ __ ___  _ __  _   _ ___  *");
console.log('\x1b[36m%s\x1b[0m', "* | |  | | |     \\___ \\  | |  | | | | | | '_ ` _ \\| '_ \\| | | / __| *");
console.log('\x1b[36m%s\x1b[0m', "* | |__| | |____ ____) | | |__| | | |_| | | | | | | |_) | |_| \\__ \\ *");
console.log('\x1b[36m%s\x1b[0m', "* |_____/ \\_____|_____/   \\____/|_|\\__, |_| |_| |_| .__/ \\__,_|___/ *");
console.log('\x1b[36m%s\x1b[0m', "*                                   __/ |         | |               *");
console.log('\x1b[36m%s\x1b[0m', "*                                  |___/          |_|               *");
console.log('\x1b[36m%s\x1b[0m', "*********************************************************************");
console.log('\x1b[36m%s\x1b[0m', "");
console.log("Please wait while DCS Olympus DEMO Backend Server starts up...");
console.log(`Config location: ${args["config"]}`)

var fs = require('fs');
let rawdata = fs.readFileSync(args["config"]);
let config = JSON.parse(rawdata);

/**
 * Module dependencies.
 */

var app = require('../demo')(args["config"]);
var debug = require('debug')('client:server');
var http = require('http');

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

var configPort = null;
if (config["backend"] != undefined && config["backend"]["port"] != undefined) {
	configPort = config["backend"]["port"];
}

var port = normalizePort(configPort || '3001');
app.set('port', port);
console.log("Express server listening on port: " + port)

/**
 * 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);
}

console.log("DCS Olympus DEMO Backend Server {{OLYMPUS_VERSION_NUMBER}}.{{OLYMPUS_COMMIT_HASH}} started correctly!")
console.log("Waiting for connections...")

process.title = `DCS Olympus DEMO Backend Server {{OLYMPUS_VERSION_NUMBER}} (${port})`;