/**
 * Licensed Materials - Property of IBM
 * IBM Watson Analytics (C) Copyright IBM Corp. 2014, 2016, 2017
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */
if (typeof define !== 'function') {
	var define = require('amdefine')(module);	// jshint ignore:line
}
define(['bluebird', 'require'], function(Promise, require) {
	return {

		/**
		 * Custom require function to use;
		 * setting to null, will use the global require
		 * @type {Function}
		 */
		require: null,

		//
		// Loads modules using Promise API rather than callbacks
		//
		// Usage:
		//  AMD.loadModules(['a/b/c', 'd/e/f'])
		//      .spread(function(C, F) { ... });
		// Notes:
		// - Use of promises can introduce a small performance overhead;
		// - Should not use this for perf-critical operations.
		//
		loadModules: function(modules) {
			var promises = [];
			var deferreds = [];
			modules.forEach(function() {
				var dfd = {};
				var promise = new Promise(function(resolve, reject) {
					dfd.resolve = resolve;
					dfd.reject = reject;
				});
				deferreds.push(dfd);
				promises.push(promise);
			});
			require = this.require || require;
			require(modules, function() {
				for (var i = 0; i < arguments.length; i++) {
					deferreds[i].resolve(arguments[i]);
				}
			}, function(err) {
				deferreds[0].reject(err);
			});
			return Promise.all(promises);
		}
	};
});