// ==UserScript==
// @name         YouTube Restore Dislike Counters
// @version      1.0.0
// @description  A userscript to restore the dislike counts on YouTube. Not 100% accurate all the time, but stil pretty accurate.
// @author       syndiate
// @match        *://www.youtube.com/*
// @run_at       document_start
// ==/UserScript==

function numberWithCommas(x) {
    return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}

async function waitForElm(s) {
    while (!document.querySelector(s)) {
        await new Promise(r => requestAnimationFrame(r))
    }
    return;
}

async function init() {

    try {

    var data = document.querySelector("ytd-app").data;

        for (p = 0; p < data.response.contents.twoColumnWatchNextResults.results.results.contents.length; p++) {

            if (typeof data.response.contents.twoColumnWatchNextResults.results.results.contents[p].videoPrimaryInfoRenderer != 'undefined') {

                var vidroot = data.response.contents.twoColumnWatchNextResults.results.results.contents[p];

            }

        }

        if (vidroot.videoPrimaryInfoRenderer.videoActions.menuRenderer.topLevelButtons[0].toggleButtonRenderer.isToggled) {

    var l = parseInt(vidroot.videoPrimaryInfoRenderer.videoActions.menuRenderer.topLevelButtons[0].toggleButtonRenderer.toggledText.accessibility.accessibilityData.label.replace(/( likes|,)/g, ""));

        } else {


             var l = parseInt(vidroot.videoPrimaryInfoRenderer.videoActions.menuRenderer.topLevelButtons[0].toggleButtonRenderer.defaultText.accessibility.accessibilityData.label.replace(/( likes|,)/g, ""));

        }
    var r = data.playerResponse.videoDetails.averageRating;

    function calculateDislikes(l, r) {
var d = Math.round(l*((5-r)/(r-1)));
        return d;
    }

    if (r != 0) {

    var dislikes = await calculateDislikes(l, r);

    } else {

        var dislikes = 0;

    }

    var dislikesfin = numberWithCommas(dislikes)
    var likesfin = numberWithCommas(l);
    // added bonus

        if (r != 0) {

    document.querySelector("yt-formatted-string#text.ytd-toggle-button-renderer").innerHTML = likesfin;

        } else {

            document.querySelector("yt-formatted-string#text.ytd-toggle-button-renderer").innerHTML = "0";

        }

    document.querySelectorAll("yt-formatted-string#text.ytd-toggle-button-renderer")[1].innerHTML = dislikesfin;

    var sentimentPercent = 100/(1+(5-r)/(r-1));

    document.querySelector("ytd-sentiment-bar-renderer").removeAttribute("hidden");

    document.getElementById("like-bar").setAttribute("style", "width: " + sentimentPercent + "%;");

    } catch(e) {};

}

waitForElm("yt-formatted-string#text.ytd-toggle-button-renderer").then(() => init());

window.addEventListener('yt-page-data-updated', init, false);