// Floating language picker — self-hosted translation. Text nodes are collected,
// translated through /api/public/translate (server-cached forever per string),
// and swapped in place. A MutationObserver keeps late-rendered dashboard panels
// translated too. No third-party scripts touch the page.
(function(){
  var LANGS=[['es','Español'],['pt','Português'],['fr','Français'],['de','Deutsch'],['it','Italiano'],
    ['nl','Nederlands'],['pl','Polski'],['ro','Română'],['ru','Русский'],['uk','Українська'],
    ['tr','Türkçe'],['ar','العربية'],['hi','हिन्दी'],['fil','Filipino'],['vi','Tiếng Việt'],
    ['id','Bahasa Indonesia'],['th','ไทย'],['zh','中文'],['ja','日本語'],['ko','한국어'],['sw','Kiswahili']];
  var STYLE=''+
    '#rmcTrBtn{position:fixed;bottom:18px;left:18px;z-index:9998;display:flex;align-items:center;gap:7px;'+
    'background:#0d2236;border:1px solid #24425d;color:#f7f9fc;border-radius:999px;padding:9px 14px;'+
    'font:700 13px/1 Inter,system-ui,sans-serif;cursor:pointer;box-shadow:0 6px 24px rgba(0,0,0,.35)}'+
    '#rmcTrBtn:hover{border-color:#4ed6cb}'+
    '#rmcTrPanel{position:fixed;bottom:64px;left:18px;z-index:9999;background:#0d2236;border:1px solid #24425d;'+
    'border-radius:14px;padding:12px;display:none;box-shadow:0 10px 34px rgba(0,0,0,.45);max-height:60vh;overflow:auto;width:230px}'+
    '#rmcTrPanel.on{display:block}'+
    '#rmcTrPanel .t{color:#aebdca;font:600 12px/1.4 Inter,system-ui,sans-serif;margin:0 0 8px}'+
    '#rmcTrPanel button{display:block;width:100%;text-align:left;background:none;border:none;color:#f7f9fc;'+
    'padding:8px 10px;border-radius:8px;font:600 14px/1 Inter,system-ui,sans-serif;cursor:pointer}'+
    '#rmcTrPanel button:hover{background:#123049}'+
    '#rmcTrPanel button.on{background:#123049;color:#4ed6cb}'+
    '@media print{#rmcTrBtn,#rmcTrPanel,.chat-fab,.chat-panel{display:none!important}}';
  var lang=null;
  try{ lang=localStorage.getItem('rmc.lang')||null; }catch(e){}
  var cacheKey=function(){ return 'rmc.tr.'+lang; };
  var memo={};
  function loadMemo(){ memo={}; try{ memo=JSON.parse(sessionStorage.getItem(cacheKey())||'{}'); }catch(e){} }
  function saveMemo(){ try{ var k=Object.keys(memo); if(k.length>900){memo={};} sessionStorage.setItem(cacheKey(),JSON.stringify(memo)); }catch(e){} }

  var SKIP={SCRIPT:1,STYLE:1,NOSCRIPT:1,CODE:1,TEXTAREA:1,SELECT:1};
  function collect(root){
    var nodes=[],w=document.createTreeWalker(root,NodeFilter.SHOW_TEXT,{acceptNode:function(n){
      var p=n.parentNode; if(!p||SKIP[p.nodeName])return NodeFilter.FILTER_REJECT;
      if(p.closest&&p.closest('#rmcTrPanel,#rmcTrBtn'))return NodeFilter.FILTER_REJECT;
      var t=n.nodeValue; if(!t||!t.trim()||t.trim().length<2)return NodeFilter.FILTER_REJECT;
      if(!/[A-Za-z]{2}/.test(t))return NodeFilter.FILTER_REJECT;
      if(n.__rmcTr===lang)return NodeFilter.FILTER_REJECT;
      return NodeFilter.FILTER_ACCEPT;
    }});
    var n; while((n=w.nextNode()))nodes.push(n);
    return nodes;
  }
  var busy=false,queued=false;
  function translatePage(root){
    if(!lang)return;
    if(busy){queued=true;return}
    busy=true;
    var nodes=collect(root||document.body);
    var uniq=[],idx={};
    nodes.forEach(function(n){ var t=n.nodeValue.trim(); if(!(t in idx)&&memo[t]==null){ idx[t]=uniq.length; uniq.push(t);} });
    var chunks=[]; for(var i=0;i<uniq.length;i+=20)chunks.push(uniq.slice(i,i+20));
    function apply(){
      nodes.forEach(function(n){
        var raw=n.nodeValue,t=raw.trim(),tr=memo[t];
        if(tr&&tr!==t){ n.nodeValue=raw.replace(t,tr); }
      });
    }
    apply(); // whatever the memo already covers shows instantly
    // parallel chunks, each swapped in the moment it returns — a first-ever
    // page+language visit translates progressively instead of all-at-the-end
    Promise.all(chunks.map(function(ch){
      return fetch('/api/public/translate',{method:'POST',headers:{'Content-Type':'application/json'},
        body:JSON.stringify({tl:lang,texts:ch})}).then(function(r){return r.json()}).then(function(d){
          if(d&&Array.isArray(d.t)){ ch.forEach(function(t,j){ memo[t]=d.t[j]; }); apply(); }
        }).catch(function(){});
    })).then(function(){
      saveMemo();
      nodes.forEach(function(n){ n.__rmcTr=lang; });
      busy=false;
      if(queued){queued=false;translatePage();}
    });
  }
  var moTimer=null;
  var mo=new MutationObserver(function(){
    if(!lang)return;
    clearTimeout(moTimer); moTimer=setTimeout(function(){translatePage();},700);
  });

  function setLang(code){
    if(code){ lang=code; try{localStorage.setItem('rmc.lang',code)}catch(e){} loadMemo(); translatePage(); }
    else{ lang=null; try{localStorage.removeItem('rmc.lang')}catch(e){} location.reload(); }
  }
  function mount(){
    var st=document.createElement('style');st.textContent=STYLE;document.head.appendChild(st);
    var btn=document.createElement('button');btn.id='rmcTrBtn';btn.type='button';
    btn.innerHTML='🌐 <span>Translate</span>';
    btn.setAttribute('aria-label','Translate this page');
    var panel=document.createElement('div');panel.id='rmcTrPanel';
    var htmlBits=['<p class="t">Choose your language — it sticks on every page.</p>',
      '<button data-l="">English (original)</button>'];
    LANGS.forEach(function(L){ htmlBits.push('<button data-l="'+L[0]+'"'+(lang===L[0]?' class="on"':'')+'>'+L[1]+'</button>'); });
    panel.innerHTML=htmlBits.join('');
    document.body.appendChild(btn);document.body.appendChild(panel);
    btn.addEventListener('click',function(){ panel.classList.toggle('on'); });
    panel.addEventListener('click',function(e){
      var b=e.target.closest('button[data-l]'); if(!b)return;
      panel.querySelectorAll('button').forEach(function(x){x.classList.remove('on')});
      if(b.dataset.l)b.classList.add('on');
      panel.classList.remove('on');
      setLang(b.dataset.l||null);
    });
    document.addEventListener('click',function(e){
      if(panel.classList.contains('on')&&!panel.contains(e.target)&&!btn.contains(e.target))panel.classList.remove('on');
    });
    mo.observe(document.body,{childList:true,subtree:true});
    if(lang){ loadMemo(); translatePage(); }
  }
  if(document.readyState==='loading')document.addEventListener('DOMContentLoaded',mount);else mount();
})();