/* Build-local classic-script loader. The inert manifest precedes this head script. */
(function (root) {
  'use strict';
  const doc = root.document;
  let manifest;
  try { manifest = JSON.parse(doc.getElementById('ytp-assets').textContent); }
  catch { return; } // The index must supply this map; never fetch one during boot.
  const assets = new Map(), groups = new Map(), hooks = new Map();
  const css = new Set([...doc.querySelectorAll('link[data-lazy-css]')].map(link => link.dataset.lazyCss));
  const selected = new Map();
  const url = path => selected.get(path) || (manifest.files[path]?.h ? path + '?v=' + manifest.files[path].h : './' + path.replace(/^\//,''));
  function reloadRequired(name) {
    api.reloadRequired = true;
    if (root.CustomEvent) root.dispatchEvent?.(new root.CustomEvent('ytp-reload-required', { detail: { group: name } }));
  }
  function compatible(name, current, seen = new Set()) {
    if(seen.has(name))return true;
    seen.add(name);
    const built=manifest.groups[name], newer=current.groups[name];
    if(!built || !newer || built.contract!==newer.contract)return false;
    return (newer.dependencies || []).every(dependency=>(built.dependencies || []).includes(dependency)&&compatible(dependency,current,seen));
  }
  async function select(name) {
    if (!root.caches) return;
    try {
      const cache = await root.caches.open('ytplayer-assets');
      const response = await cache.match('/__ytp_asset_state');
      const current = response && (await response.json()).current;
      const built = manifest.groups[name], newer = current?.groups[name];
      // The active layout's CSS already executed in the parser before app boot.
      if(name === 'layout:'+api.layout) return;
      if (!newer || current.buildTag === manifest.buildTag) return;
      if (!compatible(name,current)) { reloadRequired(name); return; }
      const changedList = newer.files.join('\n') !== built.files.join('\n');
      const available = new Map();
      for (const path of changedList ? newer.files : built.files) {
        // Membership and contract must both match the running core's expectation.
        if (!newer.files.includes(path) || !current.files[path]) continue;
        const key = path + '?v=' + current.files[path].h;
        const held = await cache.match(key);
        if (held?.headers.get('X-Asset-Hash') === current.files[path].h) available.set(path, key);
      }
      if(changedList && available.size !== newer.files.length)return;
      for(const [path,key] of available)selected.set(path,key);
      if(changedList)return newer;
    } catch { /* Private browsing/cache eviction: keep the embedded build-local map. */ }
  }
  function inject(path) {
    if (assets.has(path)) return assets.get(path);
    const style = /\.css$/.test(path);
    if (style && css.has(path)) return Promise.resolve();
    if (!style && !/\.js$/.test(path)) return Promise.resolve(); // workers/imports/fonts are not page scripts
    const task = new Promise((resolve, reject) => {
      const node = doc.createElement(style ? 'link' : 'script');
      if (style) { node.rel = 'stylesheet'; node.href = url(path); }
      else { node.async = false; node.src = url(path); }
      node.onload = resolve;
      node.onerror = () => reject(new Error('Unable to load ' + path));
      doc.head.append(node);
    });
    assets.set(path, task);
    task.catch(() => assets.delete(path));
    return task;
  }
  function load(name) {
    if (groups.has(name)) return groups.get(name);
    const group = manifest.groups[name];
    if (!group) return Promise.reject(new Error('Unknown asset group: ' + name));
    const task = (async () => {
      for (const dependency of group.dependencies || []) await load(dependency);
      const selectedGroup = await select(name) || group;
      for (const path of selectedGroup.files) if (!/-worker\.js$/.test(path)) await inject(path);
      for (const fn of hooks.get(name) || []) await fn();
      group.executed = true;
    })();
    groups.set(name, task);
    task.catch(error => {
      groups.delete(name);
      if (root.CustomEvent) root.dispatchEvent?.(new root.CustomEvent('ytp-lazy-error', { detail: { group: name, error } }));
    });
    return task;
  }
  const api = {
    load, prefetch: load, loaded: name => !!manifest.groups[name]?.executed, url,
    manifest, layout: 'classic', reloadRequired: false,
    worker(path) {
      const worker=new root.Worker(url(path)), post=worker.postMessage.bind(worker); let first=true;
      worker.postMessage=(message,transfer)=>{
        if(first) { first=false; message={...message,assetUrls:{sha256:url('/sha256.js'),wasm:url('/sha256-wasm.js'),resume:url('/resume-core.js')}}; }
        post(message,transfer);
      };
      return worker;
    },
    reportLayout(registration) {
      const send = reg => {
        const workers = new Set([root.navigator.serviceWorker.controller, reg?.installing, reg?.waiting, reg?.active]);
        for(const worker of workers) worker?.postMessage({type:'LAYOUT',value:api.layout});
      };
      if(registration)send(registration);
      else root.navigator.serviceWorker?.getRegistration().then(send).catch(()=>{});
    },
    warm() {
      if(root.navigator.connection?.saveData || !root.navigator.serviceWorker) return;
      const idle = root.requestIdleCallback || (fn => root.setTimeout(fn,1000));
      idle(()=>root.navigator.serviceWorker.ready.then(reg=>reg.active?.postMessage({type:'WARM_ASSETS',saveData:!!root.navigator.connection?.saveData})).catch(()=>{}));
    },
    onLoad(name, fn) {
      if(api.loaded(name)) { Promise.resolve().then(fn).catch(error=>{if(root.CustomEvent)root.dispatchEvent?.(new root.CustomEvent('ytp-lazy-error',{detail:{group:name,error}}));}); return; }
      const list = hooks.get(name) || []; list.push(fn); hooks.set(name, list);
    },
    proxy(name, methods, globalName) {
      return Object.fromEntries(methods.map(method => [method, async (...args) => {
        await load(name);
        const key = globalName || name.split(':')[1];
        const target = root.YT?.[key] || root[key];
        if (typeof target?.[method] !== 'function') throw new Error('Missing lazy method: ' + method);
        return target[method](...args);
      }]));
    },
    intent(element, name) {
      if (!element) return;
      for (const type of ['pointerenter', 'focus', 'touchstart']) element.addEventListener(type, () => load(name).catch(() => {}), { once: true, passive: true });
    },
  };
  root.Lazy = api;
  root.navigator.serviceWorker?.addEventListener('message',event=>{
    if(event.data?.type==='ASSET_LAYOUT_REQUEST') event.source?.postMessage({type:'LAYOUT',value:api.layout});
    if(event.data?.type==='SW_UPDATE_AVAILABLE') api.warm();
  });
  root.navigator.serviceWorker?.addEventListener('controllerchange',()=>{api.reportLayout();api.warm();});
  let settings={};
  try { settings=JSON.parse(root.localStorage.getItem('_ytpdata') || '{}').settings || {}; api.layout=settings.layout || 'classic'; } catch {}
  Object.assign(doc.documentElement.dataset,{layout:api.layout,theme:settings.theme || 'dark',font:settings.fontScale || 'normal',density:settings.density || 'comfortable',perf:settings.perfMode?'on':'off',motion:settings.reduceMotion?'reduced':'full'});
  const layoutName = manifest.groups['layout:' + api.layout] ? 'layout:'+api.layout : 'layout:classic';
  const layoutGroups = new Set([layoutName]);
  for(const name of layoutGroups) for(const dependency of manifest.groups[name]?.dependencies || []) layoutGroups.add(dependency);
  if (doc.readyState === 'loading') for (const path of [...layoutGroups].flatMap(name=>manifest.groups[name]?.files || [])) {
    if (!/\.css$/.test(path) || css.has(path)) continue;
    // Parser-inserted CSS blocks rendering; dynamic head links do not on all WebKit versions.
    css.add(path);
    doc.write('<link rel="stylesheet" href="' + url(path) + '" data-lazy-css="' + path + '">');
  }
})(typeof window !== 'undefined' ? window : globalThis);