// ==UserScript==
// @name         显示youtube好评/差评比例
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       SSmJaE
// @match        https://www.youtube.com/watch?v=*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // Your code here...
    var oldUrl;

    function change() {
        oldUrl = location.href;
        let up = document.querySelector('[aria-label*="顶过"][id="text"]');
        let down = document.querySelector('[aria-label*="踩"][id="text"]');
        let upCount = up.getAttribute('aria-label');
        let downCount = down.getAttribute('aria-label');
        let shareButton=document.querySelector('div#info div#menu div#top-level-buttons ytd-button-renderer #text');

        upCount = upCount.replace(',', '');
        upCount = parseInt(upCount);
        downCount = downCount.replace(',', '');
        downCount = parseInt(downCount);

        let ratio = Math.round(upCount * 1000 / (upCount + downCount)) / 10;
        shareButton.textContent = ratio + "%";
    }

    function check() {
        let newUrl = location.href;
        if (newUrl != oldUrl) {
            change();
            console.log('changing');
        }
    }

    function wait() {
        setInterval(check, 5000);
        console.log("wait onload");
    }
    window.addEventListener("load", change, false);
    window.addEventListener('load', wait, false);
})();