// ==UserScript==
// @name         Twitch & Kick Latency
// @namespace    latency
// @version      1.3
// @description  Displays the Twitch and Kick play latency
// @author       frz
// @icon         https://www.allkeyshop.com/blog/wp-content/uploads/Twitch-vs-Kick_featured.png
// @match        https://www.twitch.tv/*
// @match        https://kick.com/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    let header = null;
    const platform = location.hostname.includes('kick.com') ? 'kick' : 'twitch';
    let spinner = null;

    function styleHeader(el) {
        el.style.display = 'flex';
        el.style.alignItems = 'center';
        el.style.justifyContent = 'center';
        el.style.color = '#fff';
        el.style.fontWeight = '600';
        el.style.fontSize = '15px';
        el.style.cursor = 'pointer';
        el.style.gap = '6px';
    }

    function createRedDot() {
        const dot = document.createElement('span');
        dot.id = 'latency-red-dot';
        dot.style.cssText = 'display:inline-block;width:8px;height:8px;border-radius:50%;background:#FF4B4B;';
        return dot;
    }

    async function readTwitchStats(timeoutMs = 1500) {
        const existing = document.querySelector('p[aria-label="Задержка до владельца канала"]');
        if (existing) return existing.textContent.trim();

        const toggleStats = () => {
            const evt = { ctrlKey: true, altKey: true, shiftKey: true, code: 'KeyS', key: 'S', bubbles:true, cancelable:true };
            document.dispatchEvent(new KeyboardEvent('keydown', evt));
            document.dispatchEvent(new KeyboardEvent('keyup', evt));
        };

        try { toggleStats(); } catch(e){}

        const start = Date.now();
        while(Date.now() - start < timeoutMs) {
            const p = document.querySelector('p[aria-label="Задержка до владельца канала"]');
            if (p && p.textContent.trim().length) {
                const container = p.closest('table, .tw-stat, div');
                if (container) container.style.display = 'none';
                try { toggleStats(); } catch(e){}
                return p.textContent.trim();
            }
            await new Promise(r=>setTimeout(r,150));
        }

        try { toggleStats(); } catch(e){}
        return null;
    }

    function readKickLatency() {
        const video = document.querySelector('video');
        if (!video || !video.buffered.length) return null;
        const latency = video.buffered.end(video.buffered.length -1) - video.currentTime;
        return latency>0 ? latency.toFixed(2)+'s' : '0.00s';
    }

    async function getLatency() {
        if (platform === 'kick') return readKickLatency();
        const val = await readTwitchStats();
        if (!val) {
            const video = document.querySelector('video');
            if(video && video.buffered.length){
                const lat = video.buffered.end(video.buffered.length-1)-video.currentTime;
                return lat>0 ? lat.toFixed(2)+'s':'0.00s';
            }
            return null;
        }
        const m = val.match(/([\d,.]+)\s*(сек|s|ms)?/i);
        if(m && m[1]){
            let num = parseFloat(m[1].replace(',','.'));
            if(m[2] && /ms/i.test(m[2])) num = (num/1000);
            return num.toFixed(2)+'s';
        }
        return val;
    }

    async function updateHeader() {
        if (!header) return;
        const latency = await getLatency();
        if (!latency) return;

        header.innerHTML = '';
        let dot = document.getElementById('latency-red-dot');
        if(!dot) dot = createRedDot();
        header.appendChild(dot);
        const span = document.createElement('span');
        span.textContent = `Latency: ${latency}`;
        header.appendChild(span);
    }

    function createSpinner() {
        if (spinner) return spinner;
        let tpl = platform==='twitch' ? document.querySelector('[data-a-target="tw-loading-spinner"]') : document.querySelector('[data-testid="loading-spinner"]');
        spinner = tpl ? tpl.cloneNode(true) : document.createElement('div');
        spinner.id = 'latency-spinner';
        spinner.style.cssText = 'position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:9999;display:none;';
        const video = document.querySelector('video');
        if(video && video.parentElement) video.parentElement.appendChild(spinner);
        return spinner;
    }

    function reloadPlayer() {
        const video = document.querySelector('video');
        if(!video) return;
        const sp = createSpinner();
        sp.style.display='block';
        const t = video.currentTime;
        video.pause();
        setTimeout(()=>{
            try{ video.currentTime = t; video.play().catch(()=>{}); } catch { location.reload(); }
            sp.style.display='none';
            updateHeader();
        },1200);
    }

    function findHeader() {
        if(header) return;
        let candidate;
        if(platform==='twitch') candidate=document.querySelector('#chat-room-header-label');
        else candidate = Array.from(document.querySelectorAll('span.absolute')).find(el=>el.textContent.trim()==='Чат');
        if(candidate){
            header=candidate;
            styleHeader(header);
            header.addEventListener('click', reloadPlayer);
            updateHeader();
        }
    }

    const observer = new MutationObserver(findHeader);
    observer.observe(document.body,{childList:true,subtree:true});

    setInterval(()=>{ if(header) updateHeader(); },2000);

})();