/* Pre-generated silent thinking clips. Only a pending chat owns this player. */
(function(){
'use strict';
const stage=document.querySelector('#stage');
if(!stage||document.documentElement.classList.contains('content-reader'))return;
const base=new URL('../',document.currentScript.src).pathname;
const ids=['glance','reflect','chin'];
const scene=document.createElement('div');scene.className='thinking-scene';
scene.setAttribute('aria-hidden','true');stage.prepend(scene);
let active=false,epoch=0,cursor=-1,current=null,shown=null,blocked=false,pageActive=true;
let failed=new Set();
const allowed=()=>active&&pageActive&&!document.hidden&&!stage.classList.contains('has-news-broadcast');
const valid=v=>active&&v===current&&v.thinkingEpoch===epoch;
function status(value){scene.dataset.state=value;}
function hide(){
 if(stage.classList.contains('thinking-scene-visible')){
  window.IdleBackground?.resetAnchor();
  stage.classList.remove('thinking-scene-visible');
 }
}
function dispose(v){
 if(!v)return;clearTimeout(v.thinkingTimer);
 if(document.fullscreenElement===v)document.exitFullscreen?.().catch(()=>{});
 if(v.webkitDisplayingFullscreen)v.webkitExitFullscreen?.();
 v.pause();v.removeAttribute('src');v.load();v.remove();
}
function arm(v){
 clearTimeout(v.thinkingTimer);
 if(valid(v)&&allowed())v.thinkingTimer=setTimeout(()=>fail(v),12000);
}
function fail(v){
 if(!valid(v))return;
 failed.add(v.dataset.clip);status('fallback');
 if(failed.size===ids.length){
  current=null;hide();dispose(v);if(shown!==v)dispose(shown);shown=null;return;
 }
 next();
}
function play(v){
 if(!valid(v)||!allowed()||blocked||v.thinkingPlaying)return;
 if(v.paused||v.ended){
  v.thinkingPlaying=true;arm(v);
  Promise.resolve(v.play()).then(()=>{
   if(!valid(v)||!allowed()||blocked)v.pause();
  }).catch(error=>{
   if(!valid(v)||!allowed()||error.name==='AbortError')return;
   if(error.name==='NotAllowedError'){blocked=true;clearTimeout(v.thinkingTimer);hide();status('blocked');}
   else fail(v);
  }).finally(()=>{v.thinkingPlaying=false;});
 }
}
function next(){
 if(!active)return;
 const previous=current;current=null;
 if(previous&&previous!==shown)dispose(previous);
 if(shown){shown.pause();clearTimeout(shown.thinkingTimer);}
 let id;
 for(let n=0;n<ids.length;n++){cursor=(cursor+1)%ids.length;if(!failed.has(ids[cursor])){id=ids[cursor];break;}}
 if(!id){hide();status('fallback');dispose(shown);shown=null;return;}
 const v=document.createElement('video');current=v;v.thinkingEpoch=epoch;
 v.dataset.clip=id;v.muted=true;v.defaultMuted=true;v.playsInline=true;v.preload='auto';v.tabIndex=-1;
 v.setAttribute('aria-label','知微正在思考');v.setAttribute('disablepictureinpicture','');
 v.addEventListener('playing',()=>{
  if(!valid(v)||!allowed()||blocked){v.pause();return;}
  clearTimeout(v.thinkingTimer);
  if(shown&&shown!==v)dispose(shown);
  shown=v;v.classList.add('is-active');stage.classList.add('thinking-scene-visible');status('playing');
 });
 v.addEventListener('ended',()=>{if(valid(v)&&allowed())next();});
 v.addEventListener('waiting',()=>{if(valid(v)&&allowed())arm(v);});
 v.addEventListener('stalled',()=>{if(valid(v)&&allowed())arm(v);});
 v.addEventListener('error',()=>fail(v));
 v.addEventListener('fullscreenchange',()=>{v.controls=document.fullscreenElement===v;});
 v.addEventListener('webkitbeginfullscreen',()=>{v.controls=true;});
 v.addEventListener('webkitendfullscreen',()=>{v.controls=false;});
 v.src=base+'static/assets/zhiwei-thinking-20261024-v1/'+id+'.mp4';
 scene.append(v);status('loading');play(v);
}
function sync(){
 if(!active)return;
 if(!allowed()){
  if(current){clearTimeout(current.thinkingTimer);current.pause();}
  if(shown&&shown!==current)shown.pause();
  hide();status('suspended');return;
 }
 if(blocked){status('blocked');return;}
 if(current){if(current.ended)next();else play(current);}
}
function stop(){
 active=false;epoch++;blocked=false;hide();
 const old=current;current=null;dispose(old);if(shown!==old)dispose(shown);shown=null;
 status('idle');
}
function start(){
 stop();active=true;failed=new Set();next();
}
new MutationObserver(sync).observe(stage,{attributes:true,attributeFilter:['class']});
document.addEventListener('visibilitychange',sync);
window.addEventListener('pagehide',()=>{pageActive=false;sync();});
window.addEventListener('pageshow',()=>{pageActive=true;sync();});
function recover(){if(active&&blocked){blocked=false;sync();}}
document.addEventListener('pointerdown',recover,{passive:true});
document.addEventListener('keydown',recover);
window.addEventListener('online',()=>{if(active){blocked=false;failed.clear();if(!current)next();else sync();}});
window.ThinkingBackground={start,stop,getVideo:()=>stage.classList.contains('thinking-scene-visible')?shown:null};
status('idle');
})();