/* ht_searcher.js ────────────────────────────────────────────────
   Dual‑index Web‑Worker search (HackTricks + HackTricks‑Cloud)
   · keeps working even if one index fails
   · cloud results rendered **blue**
   · ⏳ while loading → 🔍 when ready
*/

(() => {
    "use strict";
  
    /* ───────────── 0. helpers (main thread) ───────────── */
    const clear = el => { while (el.firstChild) el.removeChild(el.firstChild); };
  
    /* ───────────── 1. Web‑Worker code ─────────────────── */
    const workerCode = `
      self.window = self;
      self.search = self.search || {};
      const abs = p => location.origin + p;
  
      /* 1 — elasticlunr */
      try { importScripts('https://cdn.jsdelivr.net/npm/elasticlunr@0.9.5/elasticlunr.min.js'); }
      catch { importScripts(abs('/elasticlunr.min.js')); }
  
      /* 2 — load a single index (remote → local) */
      async function loadIndex(remote, local, isCloud=false){
        let rawLoaded = false;
        try {
          const r = await fetch(remote,{mode:'cors'});
          if (!r.ok) throw new Error('HTTP '+r.status);
          importScripts(URL.createObjectURL(new Blob([await r.text()],{type:'application/javascript'})));
          rawLoaded = true;
        } catch(e){ console.warn('remote',remote,'failed →',e); }
        if(!rawLoaded){
          try { importScripts(abs(local)); rawLoaded = true; }
          catch(e){ console.error('local',local,'failed →',e); }
        }
        if(!rawLoaded) return null;                 /* give up on this index */
        const data = { json:self.search.index, urls:self.search.doc_urls, cloud:isCloud };
        delete self.search.index; delete self.search.doc_urls;
        return data;
      }
  
      (async () => {
        const MAIN_RAW  = 'https://raw.githubusercontent.com/HackTricks-wiki/hacktricks/refs/heads/master/searchindex.js';
        const CLOUD_RAW = 'https://raw.githubusercontent.com/HackTricks-wiki/hacktricks-cloud/refs/heads/master/searchindex.js';
  
        const indices = [];
        const main = await loadIndex(MAIN_RAW , '/searchindex-book.js',        false); if(main)  indices.push(main);
        const cloud= await loadIndex(CLOUD_RAW, '/searchindex.js',  true ); if(cloud) indices.push(cloud);
  
        if(!indices.length){ postMessage({ready:false, error:'no-index'}); return; }
  
        /* build index objects */
        const built = indices.map(d => ({
          idx : elasticlunr.Index.load(d.json),
          urls: d.urls,
          cloud: d.cloud,
          base: d.cloud ? 'https://cloud.hacktricks.wiki/' : ''
        }));
  
        postMessage({ready:true});
        const MAX = 30, opts = {bool:'AND', expand:true};
  
        self.onmessage = ({data:q}) => {
          if(!q){ postMessage([]); return; }
  
          const all = [];
          for(const s of built){
            const res = s.idx.search(q,opts);
            if(!res.length) continue;
            const max = res[0].score || 1;
            res.forEach(r => {
              const doc = s.idx.documentStore.getDoc(r.ref);
              all.push({
                norm : r.score / max,
                title: doc.title,
                body : doc.body,
                breadcrumbs: doc.breadcrumbs,
                url  : s.base + s.urls[r.ref],
                cloud: s.cloud
              });
            });
          }
          all.sort((a,b)=>b.norm-a.norm);
          postMessage(all.slice(0,MAX));
        };
      })();
    `;
  
    /* ───────────── 2. spawn worker ───────────── */
    const worker = new Worker(URL.createObjectURL(new Blob([workerCode],{type:'application/javascript'})));
  
    /* ───────────── 3. DOM refs ─────────────── */
    const wrap    = document.getElementById('search-wrapper');
    const bar     = document.getElementById('searchbar');
    const list    = document.getElementById('searchresults');
    const listOut = document.getElementById('searchresults-outer');
    const header  = document.getElementById('searchresults-header');
    const icon    = document.getElementById('search-toggle');
  
    const READY_ICON = icon.innerHTML;
    icon.textContent = '⏳';
    icon.setAttribute('aria-label','Loading search …');
  
    const HOT=83, ESC=27, DOWN=40, UP=38, ENTER=13;
    let debounce, teaserCount=0;
  
    /* ───────────── helpers (teaser, metric) ───────────── */
    const escapeHTML = (()=>{const M={'&':'&amp;','<':'&lt;','>':'&gt;','"':'&#34;','\'':'&#39;'};return s=>s.replace(/[&<>'"]/g,c=>M[c]);})();
    const URL_MARK='highlight';
    function metric(c,t){return c?`${c} search result${c>1?'s':''} for '${t}':`:`No search results for '${t}'.`;}
  
    function makeTeaser(body,terms){
      const stem=w=>elasticlunr.stemmer(w.toLowerCase());
      const T=terms.map(stem),W_S=40,W_F=8,W_N=2,WIN=30;
      const W=[],sents=body.toLowerCase().split('. ');
      let i=0,v=W_F,found=false;
      sents.forEach(s=>{v=W_F; s.split(' ').forEach(w=>{ if(w){ if(T.some(t=>stem(w).startsWith(t))){v=W_S;found=true;} W.push([w,v,i]); v=W_N;} i+=w.length+1; }); i++;});
      if(!W.length) return body;
      const win=Math.min(W.length,WIN);
      const sums=[W.slice(0,win).reduce((a,[,wt])=>a+wt,0)];
      for(let k=1;k<=W.length-win;k++) sums[k]=sums[k-1]-W[k-1][1]+W[k+win-1][1];
      const best=found?sums.lastIndexOf(Math.max(...sums)):0;
      const out=[]; i=W[best][2];
      for(let k=best;k<best+win;k++){const [w,wt,pos]=W[k]; if(i<pos){out.push(body.substring(i,pos)); i=pos;} if(wt===W_S) out.push('<em>'); out.push(body.substr(pos,w.length)); if(wt===W_S) out.push('</em>'); i=pos+w.length;}
      return out.join('');
    }
  
    function format(d,terms){
      const teaser=makeTeaser(escapeHTML(d.body),terms);
      teaserCount++;
      const enc=encodeURIComponent(terms.join(' ')).replace(/'/g,'%27');
      const parts=d.url.split('#'); if(parts.length===1) parts.push('');
      const abs=d.url.startsWith('http');
      const href=`${abs?'':path_to_root}${parts[0]}?${URL_MARK}=${enc}#${parts[1]}`;
      const style=d.cloud?" style=\"color:#1e88e5\"":"";
      const isCloud=d.cloud?" [Cloud]":" [Book]";
      return `<a href="${href}" aria-details="teaser_${teaserCount}"${style}>`+
             `${d.breadcrumbs}${isCloud}<span class="teaser" id="teaser_${teaserCount}" aria-label="Search Result Teaser">${teaser}</span></a>`;
    }
  
    /* ───────────── UI control ───────────── */
    function showUI(s){wrap.classList.toggle('hidden',!s); icon.setAttribute('aria-expanded',s); if(s){window.scrollTo(0,0); bar.focus(); bar.select();} else {listOut.classList.add('hidden'); [...list.children].forEach(li=>li.classList.remove('focus'));}}
    function blur(){const t=document.createElement('input'); t.style.cssText='position:absolute;opacity:0;'; icon.appendChild(t); t.focus(); t.remove();}
  
    icon.addEventListener('click',()=>showUI(wrap.classList.contains('hidden')));
  
    document.addEventListener('keydown',e=>{
      if(e.altKey||e.ctrlKey||e.metaKey||e.shiftKey) return;
      const f=/^(?:input|select|textarea)$/i.test(e.target.nodeName);
      if(e.keyCode===HOT && !f){e.preventDefault(); showUI(true);} else if(e.keyCode===ESC){e.preventDefault(); showUI(false); blur();}
      else if(e.keyCode===DOWN && document.activeElement===bar){e.preventDefault(); const first=list.firstElementChild; if(first){blur(); first.classList.add('focus');}}
      else if([DOWN,UP,ENTER].includes(e.keyCode) && document.activeElement!==bar){const cur=list.querySelector('li.focus'); if(!cur) return; e.preventDefault(); if(e.keyCode===DOWN){const nxt=cur.nextElementSibling; if(nxt){cur.classList.remove('focus'); nxt.classList.add('focus');}} else if(e.keyCode===UP){const prv=cur.previousElementSibling; cur.classList.remove('focus'); if(prv){prv.classList.add('focus');} else {bar.focus();}} else {const a=cur.querySelector('a'); if(a) window.location.assign(a.href);}}
    });
  
    bar.addEventListener('input',e=>{ clearTimeout(debounce); debounce=setTimeout(()=>worker.postMessage(e.target.value.trim()),120); });
  
    /* ───────────── worker messages ───────────── */
    worker.onmessage = ({data}) => {
      if(data && data.ready!==undefined){
        if(data.ready){ icon.innerHTML=READY_ICON; icon.setAttribute('aria-label','Open search (S)'); }
        else { icon.textContent='❌'; icon.setAttribute('aria-label','Search unavailable'); }
        return;
      }
      const docs=data, q=bar.value.trim(), terms=q.split(/\s+/).filter(Boolean);
      header.textContent=metric(docs.length,q);
      clear(list);
      docs.forEach(d=>{const li=document.createElement('li'); li.innerHTML=format(d,terms); list.appendChild(li);});
      listOut.classList.toggle('hidden',!docs.length);
    };
  })();
  