export let promise = Promise;

Object.assign || (Object.assign = function () {
    const args = arguments,
          size = args.length,
          obj = args[0];


    for (let x = 1, current, keys, length; x < size; x++) {

        current = args[x];
        keys = Object.keys(current);
        length = keys.length;

        for (let i = 0, key; i < length; i++) {

            key = keys[i];
            obj[key] = current[key];
        }
    }

    return obj;
});

// Object.values || (Object.values = function(obj){
//
//     const keys = Object.keys(obj);
//     const length = keys.length;
//     const values = new Array(length);
//
//     for(let x = 0; x < length; x++){
//
//         values[x] = obj[keys[x]];
//     }
//
//     return values;
// });

if (!promise) {

    /**
     * @param {Function} fn
     * @constructor
     */

    function SimplePromise(fn) {

        this.callback = null;

        const self = this;

        fn(function (val) {

            if (self.callback) {

                self.callback(val);
                // self.callback = null;
                // self = null;
            }
        });
    }

    /**
     * @param {Function} callback
     */

    SimplePromise.prototype.then = function (callback) {

        this.callback = callback;
    };

    promise = SimplePromise;
}