// ==UserScript==
// @name         洛谷娱乐插件·猫和老鼠
// @namespace    http://tampermonkey.net/
// @version      1.1.1
// @description  在洛谷题库右下角（也就是广告处）添加猫和老鼠，供大家娱乐使用
// @author       jyb666
// @match        *://www.luogu.com.cn/problem/*
// @grant        none
// @run-at       document-end
// @downloadURL none
// ==/UserScript==

(function() {
  'use strict';
  var url = Array(
      "https://p.pstatp.com/origin/137ae0000ff92b45e4c00",
      "https://p.pstatp.com/origin/137fe0000c4baede1f9b8",
      "https://pic.imgdb.cn/item/5f45085e160a154a676400f4.gif",
      "https://pic.imgdb.cn/item/5f450865160a154a67640621.gif",
      "https://pic.imgdb.cn/item/5f4508b5160a154a67643f27.gif",
      "https://pic.imgdb.cn/item/5f4508f3160a154a6764689c.gif",
      "https://pic.imgdb.cn/item/5f450935160a154a67649b87.gif",
      "https://pic.imgdb.cn/item/5f45dd86160a154a67262734.gif",
      "https://pic.imgdb.cn/item/5f45dcf3160a154a672586c3.gif",
      "https://pic.imgdb.cn/item/5f463529160a154a677b475a.gif",
      "https://pic.imgdb.cn/item/5f45de5e160a154a672701d9.gif"
  );
  function randomNum(minNum,maxNum){ 
    switch(arguments.length){ 
      case 1: 
        return parseInt(Math.random()*minNum+1,10); 
      break; 
      case 2:
        return parseInt(Math.random()*(maxNum-minNum+1)+minNum,10);
      break; 
      default: 
        return 0; 
      break; 
    } 
  } 
  var status_html = "<div data-v-0a593618=\"\" data-v-7b37eb95=\"\"><img style=\"width:100%;\" src=\""+url[randomNum(0,url.length-1)]+"\"> <span data-v-0a593618=\"\"><svg data-v-0a593618=\"\" aria-hidden=\"true\" focusable=\"false\" data-prefix=\"fas\" data-icon=\"ad\" role=\"img\" xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-ad fa-w-16\"><path data-v-0a593618=\"\" fill=\"currentColor\" d=\"M157.52 272h36.96L176 218.78 157.52 272zM352 256c-13.23 0-24 10.77-24 24s10.77 24 24 24 24-10.77 24-24-10.77-24-24-24zM464 64H48C21.5 64 0 85.5 0 112v288c0 26.5 21.5 48 48 48h416c26.5 0 48-21.5 48-48V112c0-26.5-21.5-48-48-48zM250.58 352h-16.94c-6.81 0-12.88-4.32-15.12-10.75L211.15 320h-70.29l-7.38 21.25A16 16 0 0 1 118.36 352h-16.94c-11.01 0-18.73-10.85-15.12-21.25L140 176.12A23.995 23.995 0 0 1 162.67 160h26.66A23.99 23.99 0 0 1 212 176.13l53.69 154.62c3.61 10.4-4.11 21.25-15.11 21.25zM424 336c0 8.84-7.16 16-16 16h-16c-4.85 0-9.04-2.27-11.98-5.68-8.62 3.66-18.09 5.68-28.02 5.68-39.7 0-72-32.3-72-72s32.3-72 72-72c8.46 0 16.46 1.73 24 4.42V176c0-8.84 7.16-16 16-16h16c8.84 0 16 7.16 16 16v160z\" class=\"\"></path></svg>&nbsp;洛谷娱乐</span> </div>";
  function init() {
    var node = document.createElement('div');
    node.innerHTML = status_html;
    document.querySelector('section.side > div:nth-child(4)').insertAdjacentElement('afterend', node);
  }
  setTimeout(init, 3000);
})();