/* widget: Hakken & plakken */
/* =========================================================
   Chop & blend widget — words in sounds, with read-aloud
==========================================================*/
function mountHak(root, initState){
  const S = { card:0, idx:0, order:[], chopped:false };
  if(initState) S.card = initState.card ?? 0;
  const canSpeak = "speechSynthesis" in window;

  root.innerHTML = `
    <div class="mt">
      <div class="mt-top">
        <select class="fl-sel hk-src"></select>
        <div class="mt-score hk-cnt"></div>
      </div>
      <div class="mt-card">
        <div class="fl-pic hk-pic"></div>
        <div class="hk-word"></div>
      </div>
      <div class="trow" style="display:flex;gap:8px;justify-content:center;flex-wrap:wrap;flex:none;">
        <button class="tbtn hk-say" ${canSpeak?"":'style="display:none"'}></button>
        <button class="tbtn ghost hk-chop"></button>
        <button class="tbtn ghost hk-glue"></button>
        <button class="tbtn ghost hk-next">▸</button>
      </div>
    </div>`;
  const el = s => root.querySelector(s);
  const srcSel = el(".hk-src"), wordEl = el(".hk-word"),
        picEl = el(".hk-pic"), cntEl = el(".hk-cnt");

  function list(){ S.card = normWordSource(S.card); return wordSourceList(S.card); }
  function buildSrc(){ fillWordSourceSel(srcSel, S.card); }
  function cur(){ return list()[S.order[S.idx]]; }
  function newRound(){ S.order = shuffle(list().map((_,i)=>i)); S.idx = 0; }
  function display(){
    const [w, pic] = cur();
    wordEl.innerHTML = "";
    if(S.chopped){
      w.split("").forEach((l,i)=>{
        if(i>0){
          const sep = document.createElement("span");
          sep.className = "hk-sep"; sep.textContent = "–";
          wordEl.appendChild(sep);
        }
        const s = document.createElement("span");
        s.className = "hk-l " + (VOWELS.includes(l) ? "v" : "c");
        s.textContent = l;
        s.style.animationDelay = (i*0.08)+"s";
        wordEl.appendChild(s);
      });
    }else{
      const s = document.createElement("span");
      s.className = "hk-whole";
      s.textContent = w;
      wordEl.appendChild(s);
    }
    setPic(picEl, pic);
    cntEl.textContent = `${T("word")} ${S.idx+1}/${S.order.length}`;
  }
  function speak(text, rate){
    if(!canSpeak) return;
    speechSynthesis.cancel();
    const u = new SpeechSynthesisUtterance(text);
    u.lang = LANG==="nl" ? "nl-NL" : "en-GB";
    u.rate = rate;
    speechSynthesis.speak(u);
  }
  el(".hk-say").addEventListener("click", ()=>{
    if(S.chopped) speak(cur()[0].split("").join(", "), 0.7);
    else speak(cur()[0], 0.85);
  });
  el(".hk-chop").addEventListener("click", ()=>{ S.chopped = true; display(); play(sndGood); });
  el(".hk-glue").addEventListener("click", ()=>{ S.chopped = false; display(); play(sndGood); });
  el(".hk-next").addEventListener("click", ()=>{
    S.idx++; if(S.idx >= S.order.length) newRound();
    S.chopped = false; display();
  });
  const play = f=>f();
  srcSel.addEventListener("change", ()=>{
    S.card = srcSel.value.startsWith("t") ? srcSel.value : +srcSel.value;
    newRound(); S.chopped = false; display();
  });
  function labels(){
    el(".hk-say").textContent = T("hakSay");
    el(".hk-chop").textContent = T("hakChop");
    el(".hk-glue").textContent = T("hakGlue");
    buildSrc();
  }
  document.addEventListener("langchange", ()=>{ S.card=0; labels(); newRound(); S.chopped=false; display(); });
  document.addEventListener("wordschange", ()=>{ buildSrc(); newRound(); S.chopped=false; display(); });
  labels(); newRound(); display();
  return { getState: ()=>({card:S.card}) };
}