import 'core-js/es7/reflect';
import 'zone.js/dist/zone';

import 'core-js/es6/symbol';
import 'core-js/es6/object';
import 'core-js/es6/function';
import 'core-js/es6/parse-int';
import 'core-js/es6/parse-float';
import 'core-js/es6/number';
import 'core-js/es6/math';
import 'core-js/es6/string';
import 'core-js/es6/date';
import 'core-js/es6/array';
import 'core-js/es6/regexp';
import 'core-js/es6/map';
import 'core-js/es6/set';
import 'core-js/es6/weak-map';
import 'core-js/es6/weak-set';
import 'core-js/es6/typed';
import 'core-js/es6/reflect';
// see issue https://github.com/AngularClass/angular2-webpack-starter/issues/709
// import 'core-js/es6/promise';

// Typescript emit helpers polyfill
import 'ts-helpers';

if (!IS_PRODUCTION) {
  Error.stackTraceLimit = Infinity;
  require('zone.js/dist/long-stack-trace-zone');
}

interface Element {
  scrollIntoViewIfNeeded(centerIfNeeded?: boolean): void;
};

if (!(<any>Element).prototype.scrollIntoViewIfNeeded) {
  (<any>Element).prototype.scrollIntoViewIfNeeded = function (centerIfNeeded) {
    centerIfNeeded = arguments.length === 0 ? true : !!centerIfNeeded;

    var parent = this.parentNode,
        parentComputedStyle = window.getComputedStyle(parent, null),
        parentBorderTopWidth = parseInt(parentComputedStyle.getPropertyValue('border-top-width')),
        parentBorderLeftWidth = parseInt(parentComputedStyle.getPropertyValue('border-left-width')),
        overTop = this.offsetTop - parent.offsetTop < parent.scrollTop,
        overBottom = (this.offsetTop - parent.offsetTop + this.clientHeight - parentBorderTopWidth) > (parent.scrollTop + parent.clientHeight),
        overLeft = this.offsetLeft - parent.offsetLeft < parent.scrollLeft,
        overRight = (this.offsetLeft - parent.offsetLeft + this.clientWidth - parentBorderLeftWidth) > (parent.scrollLeft + parent.clientWidth),
        alignWithTop = overTop && !overBottom;

    if ((overTop || overBottom) && centerIfNeeded) {
      parent.scrollTop = this.offsetTop - parent.offsetTop - parent.clientHeight / 2 - parentBorderTopWidth + this.clientHeight / 2;
    }

    if ((overLeft || overRight) && centerIfNeeded) {
      parent.scrollLeft = this.offsetLeft - parent.offsetLeft - parent.clientWidth / 2 - parentBorderLeftWidth + this.clientWidth / 2;
    }

    if ((overTop || overBottom || overLeft || overRight) && !centerIfNeeded) {
      this.scrollIntoView(alignWithTop);
    }
  };
}