'use strict';

function getRespBody(err, debug) {
  if (debug) {
    return err.toString();
  }

  if (err.code === 'ECONNREFUSED') {
    return 'The connection was refused. Most likely the service being connected to '
      + 'has stopped running or the configuration is wrong.';
  }

  return 'Bad Gateway: ' + err.code;
}

function sendBadGateway(conn, err, debug) {
  var body = getRespBody(err, debug);

  conn.write([
    'HTTP/1.1 502 Bad Gateway'
  , 'Date: ' + (new Date()).toUTCString()
  , 'Connection: close'
  , 'Content-Type: text/html'
  , 'Content-Length: ' + body.length
  , ''
  , body
  ].join('\r\n'));
  conn.end();
}

module.exports.getRespBody = getRespBody;
module.exports.sendBadGateway = sendBadGateway;