// ==UserScript==
// @name         exp
// @namespace    http://asylum.margonem.pl/
// @version      0.1
// @author       You
// @match        http://asylum.margonem.pl
// @grant        none
// ==/UserScript==

(function() {
((_) => {
  _.required = _.calc(Engine.hero.d.lvl);
  _.proccessUpdate = function(e) {
    var diffExp = e.d.exp - _.lastExp, diffLvl = e.d.lvl - _.lastLvl;
    if (diffExp > 0) {
      let percentExp = e.d.ttl < 0 ? 0 : Math.round(diffExp * 10000 / _.required) / 100;
      message('+' + diffExp + ' (' + percentExp + '%)');
      _.lastExp = e.d.exp;
    }
    if (diffLvl > 0) {
      _.lastLvl = e.d.lvl;
      _.required = _.calc(e.d.lvl);
    }
  };
  API.addCallbackToEvent('heroUpdate', _.proccessUpdate);
})({
  lastExp: Engine.hero.d.exp,
  lastLvl: Engine.hero.d.lvl,
  required: null,
  calc: (a) => Math.pow(a, 4) - Math.pow(a - 1, 4)
});
})();