import { isObject } from 'underscore';

export default ({ $ }: { $: any }) => {
  if ($ && $.prototype && $.prototype.constructor.name !== 'jQuery') {
    const fn = $.fn;

    // Additional helpers

    fn.hide = function () {
      return this.css('display', 'none');
    };

    fn.show = function () {
      return this.css('display', 'block');
    };

    fn.focus = function () {
      const el = this.get(0);
      el && el.focus();
      return this;
    };

    // For spectrum compatibility

    fn.bind = function (ev: any, h: any) {
      return this.on(ev, h);
    };

    fn.unbind = function (ev: any, h: any) {
      if (isObject(ev)) {
        for (let name in ev) {
          ev.hasOwnProperty(name) && this.off(name, ev[name]);
        }

        return this;
      } else {
        return this.off(ev, h);
      }
    };

    fn.click = function (h: any) {
      return h ? this.on('click', h) : this.trigger('click');
    };

    fn.change = function (h: any) {
      return h ? this.on('change', h) : this.trigger('change');
    };

    fn.keydown = function (h: any) {
      return h ? this.on('keydown', h) : this.trigger('keydown');
    };

    fn.delegate = function (selector: any, events: any, data: any, handler: any) {
      if (!handler) {
        handler = data;
      }

      return this.on(events, selector, function (e: any) {
        e.data = data;
        handler(e);
      });
    };

    fn.scrollLeft = function () {
      let el = this.get(0);
      el = el.nodeType == 9 ? el.defaultView : el;
      let win = el instanceof Window ? el : null;
      return win ? win.pageXOffset : el.scrollLeft || 0;
    };

    fn.scrollTop = function () {
      let el = this.get(0);
      el = el.nodeType == 9 ? el.defaultView : el;
      let win = el instanceof Window ? el : null;
      return win ? win.pageYOffset : el.scrollTop || 0;
    };

    const offset = $.prototype.offset;
    fn.offset = function (coords: any) {
      let top, left;

      if (coords) {
        top = coords.top;
        left = coords.left;
      }

      if (typeof top != 'undefined') {
        this.css('top', `${top}px`);
      }
      if (typeof left != 'undefined') {
        this.css('left', `${left}px`);
      }

      return offset.call(this);
    };

    $.map = function (items: any, clb: any) {
      const ar = [];

      for (var i = 0; i < items.length; i++) {
        ar.push(clb(items[i], i));
      }

      return ar;
    };

    const indexOf = Array.prototype.indexOf;

    $.inArray = function (val: any, arr: any, i: any) {
      return arr == null ? -1 : indexOf.call(arr, val, i);
    };

    $.Event = function (src: any, props: any) {
      if (!(this instanceof $.Event)) {
        return new $.Event(src, props);
      }

      this.type = src;
      this.isDefaultPrevented = () => false;
    };
  }
};