// chat.js — EMM·AI (client-only, works on any static page)
(() => {
  // --------- helpers ----------
  const $ = (q, r=document) => r.querySelector(q);
  const $$ = (q, r=document) => [...r.querySelectorAll(q)];

  // Build a tiny KB from whatever exists on the page
  function buildKB(){
    // presenters: pills inside the Presenters card if present
    const presenters = $$("#live + div .pill").map(x=>x.textContent.trim());
    // schedule: rows in the schedule section if present
    const scheduleCards = $$("#schedule .grid > div");
    const schedule = scheduleCards.map(c => ({
      title: $(".text-yellow-200", c)?.textContent.trim() || "",
      time:  $(".text-yellow-100\\/70", c)?.textContent.trim() || ""
    })).filter(x=>x.title);
    // categories: links on any page
    const categories = $$('a[href$=".html"]').map(a => ({
      name: a.textContent.trim().replace(/\s+arrow_right.*$/i,''),
      href: a.getAttribute('href')
    })).filter(c => /category/i.test(c.href));
    return { presenters, schedule, categories };
  }
  const KB = buildKB();

  // Inject styles
  const css = `
  .chat-fab{position:fixed;right:18px;bottom:18px;z-index:50}
  .chat-panel{position:fixed;right:18px;bottom:86px;width:340px;max-width:92vw;z-index:50}
  .glass2{backdrop-filter: blur(10px); background: linear-gradient(135deg, rgba(18,16,12,.92), rgba(18,16,12,.55)); border:1px solid rgba(234,179,8,.25)}
  .msg{border-radius:14px;padding:.6rem .8rem;font-size:.9rem;line-height:1.35}
  .msg-ai{background:rgba(234,179,8,.07);border:1px solid rgba(234,179,8,.25);color:#fde68a}
  .msg-me{background:#0b0b0b;border:1px solid #222;color:#fefce8}
  .blink{animation:blink 1.1s linear infinite}@keyframes blink{50%{opacity:.35}}
  `;
  const st = document.createElement("style"); st.textContent = css; document.head.appendChild(st);

  // Inject widget HTML
  const wrap = document.createElement("div");
  wrap.innerHTML = `
    <div class="chat-fab">
      <button id="chatToggle" class="rounded-full w-14 h-14 bg-yellow-400 text-black shadow-xl flex items-center justify-center">
        <i data-lucide="message-circle" class="w-6 h-6"></i>
      </button>
    </div>
    <div id="chatPanel" class="chat-panel hidden">
      <div class="glass2 rounded-2xl overflow-hidden shadow-2xl">
        <div class="px-4 py-3 flex items-center justify-between border-b border-yellow-400/20">
          <div class="flex items-center gap-2">
            <div class="w-7 h-7 rounded-full bg-yellow-500/20 ring-1 ring-yellow-400/50 flex items-center justify-center">
              <i data-lucide="sparkles" class="w-4 h-4 text-yellow-300"></i>
            </div>
            <div class="text-yellow-100 text-sm font-semibold">EMM·AI — Golden Concierge</div>
          </div>
          <div class="flex items-center gap-2">
            <button id="voiceBtn" class="text-[11px] px-2 py-1 rounded bg-yellow-50/10 border border-yellow-400/20 text-yellow-200">Voice</button>
            <button id="clearBtn" class="text-[11px] px-2 py-1 rounded bg-yellow-50/10 border border-yellow-400/20 text-yellow-200">Clear</button>
            <button id="chatClose" class="text-yellow-200"><i data-lucide="x" class="w-5 h-5"></i></button>
          </div>
        </div>
        <div id="chatLog" class="h-[360px] overflow-y-auto p-3 space-y-2 text-[14px]"></div>
        <div class="p-3 border-t border-yellow-400/20">
          <form id="chatForm" class="flex gap-2">
            <input id="chatInput" class="flex-1 px-3 py-2 rounded-xl bg-black/60 border border-yellow-400/20 text-yellow-100 placeholder:text-yellow-100/50"
                   placeholder="Ask about schedule, presenters, winners…">
            <button class="px-3 py-2 rounded-xl bg-yellow-400 text-black font-semibold">Send</button>
          </form>
          <div class="mt-2 text-[11px] text-yellow-100/60">
            Try: <span class="underline cursor-pointer" data-sample="When does the live start?">When does the live start?</span> ·
            <span class="underline cursor-pointer" data-sample="Add the show to my calendar">Add the show to my calendar</span> ·
            <span class="underline cursor-pointer" data-sample="Open Outstanding Drama Series">Open Outstanding Drama Series</span>
          </div>
        </div>
      </div>
    </div>`;
  document.body.appendChild(wrap);
  if (window.lucide) window.lucide.createIcons?.();

  // UI helpers
  const log = $("#chatLog"), panel = $("#chatPanel"), input = $("#chatInput");
  function msg(role, text){
    const el = document.createElement("div");
    el.className = "msg " + (role==="ai" ? "msg-ai" : "msg-me");
    el.textContent = text;
    log.appendChild(el); log.scrollTop = log.scrollHeight;
    if (role==="ai" && speakOn) speak(text);
  }
  function typing(on){
    const old = $("#typing"); if (old) old.remove();
    if (!on) return;
    const d = document.createElement("div");
    d.id="typing"; d.className="msg msg-ai blink"; d.textContent="EMM·AI is typing…";
    log.appendChild(d); log.scrollTop = log.scrollHeight;
  }

  // Countdown helpers reused for ICS
  function nextShowtime(){
    const now = new Date(); const show = new Date(); show.setHours(20,0,0,0);
    if (now > show) show.setDate(show.getDate()+1); return show;
  }
  function addICS(){
    const target = nextShowtime();
    const fix = d => d.toISOString().replace(/[-:]/g,'').split('.')[0] + 'Z';
    const start = fix(target), end = fix(new Date(target.getTime()+2*60*60*1000));
    const ics = `BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//AI WEEK//EMMYS//EN
BEGIN:VEVENT
UID:${Date.now()}@emmys
DTSTAMP:${start}
DTSTART:${start}
DTEND:${end}
SUMMARY:Emmys Live Ceremony
DESCRIPTION:AI WEEK Emmys live broadcast.
END:VEVENT
END:VCALENDAR`.replace(/\\n/g,'\n');
    const blob = new Blob([ics], {type:'text/calendar'});
    const url = URL.createObjectURL(blob); const a = document.createElement('a');
    a.href=url; a.download='emmys.ics'; a.click(); URL.revokeObjectURL(url);
  }

  // Simple router/intents (local)
  function localAnswer(q){
    const t = q.toLowerCase();

    // open category by name or index
    const cat = KB.categories.find(c => t.includes(c.name.toLowerCase()) || t.includes(c.href.replace('.html','')));
    if (cat){ location.href = cat.href; return `Opening “${cat.name}”…`; }

    if (/(time|when|schedule|start|live)/.test(t) && KB.schedule.length){
      const s = KB.schedule.map(i=>`• ${i.title}: ${i.time}`).join('\n');
      return `Tonight’s schedule:\n${s}`;
    }
    if ((t.includes("present") || t.includes("host")) && KB.presenters.length){
      return `Presenters: ${KB.presenters.join(', ')}.`;
    }
    if (t.includes("calendar") || t.includes("ics")){ addICS(); return "Added to calendar (.ics downloaded)."; }
    if (t.includes("access denied") || t.includes("verify") || t.includes("security")){
      return "“Access Denied” = score below threshold. Accepted unlocks tools; denied keeps the system locked and logs an audit event.";
    }
    return null;
  }

  // Optional backend (if you later add one). POST /chat -> {reply}
  async function callBackend(message){
    try{
      const r = await fetch('/chat',{method:'POST',headers:{'Content-Type':'application/json'},
        body: JSON.stringify({ message, context: { page: location.pathname, KB } })});
      if (r.ok){ const j = await r.json(); return (j.reply||"").trim() || null; }
    }catch(e){}
    return null;
  }

  async function replyTo(text){
    typing(true);
    let ans = localAnswer(text);
    if (!ans) ans = await callBackend(text);
    if (!ans) ans = "I can help with schedule, presenters, winners ticker, calendar, and opening categories. Connect a backend at /chat for full AI chat.";
    typing(false); msg("ai", ans);
  }

  function hello(){
    msg("ai","Welcome to the Emmys ✨ Ask about the schedule, presenters, or say “Open Outstanding Drama Series”. Say “Add to calendar”.");
  }

  // Voice toggle (browser TTS)
  let speakOn = false;
  function speak(t){ try{ const u = new SpeechSynthesisUtterance(t); u.rate=1.02; speechSynthesis.speak(u);}catch{} }

  // Wire events
  $("#chatToggle").onclick = ()=> panel.classList.toggle("hidden");
  $("#chatClose").onclick  = ()=> panel.classList.add("hidden");
  $("#clearBtn").onclick   = ()=> { log.innerHTML=""; hello(); };
  $$("#chatPanel [data-sample]").forEach(a=> a.onclick = ()=> { const i=$("#chatInput"); i.value=a.dataset.sample; i.form.requestSubmit(); });
  $("#chatForm").addEventListener("submit", e=>{
    e.preventDefault(); const t = $("#chatInput").value.trim(); if (!t) return;
    msg("me", t); $("#chatInput").value=""; replyTo(t);
  });
  $("#voiceBtn").onclick = (e)=>{ speakOn = !speakOn; e.target.classList.toggle("bg-yellow-400"); e.target.classList.toggle("text-black"); };

  hello();
})();