"use strict";
  var util = require("./util");
  var maybeWrapAsError = util.maybeWrapAsError;
  var errors = require("./errors");
  var OperationalError = errors.OperationalError;
  var es5 = require("./es5");
  
  function isUntypedError(obj) {
      return obj instanceof Error &&
          es5.getPrototypeOf(obj) === Error.prototype;
  }
  
  var rErrorKey = /^(?:name|message|stack|cause)$/;
  function wrapAsOperationalError(obj) {
      var ret;
      if (isUntypedError(obj)) {
          ret = new OperationalError(obj);
          ret.name = obj.name;
          ret.message = obj.message;
          ret.stack = obj.stack;
          var keys = es5.keys(obj);
          for (var i = 0; i < keys.length; ++i) {
              var key = keys[i];
              if (!rErrorKey.test(key)) {
                  ret[key] = obj[key];
              }
          }
          return ret;
      }
      util.markAsOriginatingFromRejection(obj);
      return obj;
  }
  
  function nodebackForPromise(promise, multiArgs) {
      return function(err, value) {
          if (promise === null) return;
          if (err) {
              var wrapped = wrapAsOperationalError(maybeWrapAsError(err));
              promise._attachExtraTrace(wrapped);
              promise._reject(wrapped);
          } else if (!multiArgs) {
              promise._fulfill(value);
          } else {
              var $_len = arguments.length;var args = new Array(Math.max($_len - 1, 0)); for(var $_i = 1; $_i < $_len; ++$_i) {args[$_i - 1] = arguments[$_i];};
              promise._fulfill(args);
          }
          promise = null;
      };
  }
  
  module.exports = nodebackForPromise;