// ---------- Слоги ----------

function syllabifyIT(w) {
  const isV = c => 'aeiouàèéìíòóùú'.includes(c.toLowerCase());
  const onset = s => /^(str|scr|spr|spl|bl|br|cl|cr|dr|fl|fr|gl|gn|gr|pl|pr|sc|sk|sl|sm|sn|sp|sq|sr|st|sv|tr|ch|gh)/i.test(s);
  let out = [], syl = '', i = 0;
  while (i < w.length) {
    syl += w[i];
    if (isV(w[i])) {
      let j = i + 1, cons = '';
      while (j < w.length && !isV(w[j])) cons += w[j++];
      if (j < w.length && cons.length > 0) {
        const k = cons.length === 1 ? 0 : onset(cons.slice(1)) ? 1 : Math.floor(cons.length / 2);
        syl += cons.slice(0, k);
        out.push(syl); syl = '';
        i += k;
      }
    }
    i++;
  }
  if (syl) out.push(syl);
  return out.join('-');
}

function syllabifyPhrase(text) {
  return text.split(/\s+/).map(syllabifyIT).join(' ');
}

// ---------- AudioContext для проигрывания слогов ----------
let _audioCtx = null;
async function getAudioCtx() {
  if (!_audioCtx) _audioCtx = new (window.AudioContext || window.webkitAudioContext)();
  if (_audioCtx.state === 'suspended') await _audioCtx.resume();
  return _audioCtx;
}

let _currentBlob = null;
let _currentSylBuf = null;

async function playSyllable(sylIdx, total) {
  console.log('[SYL] click', sylIdx, '/', total, 'blob=', !!_currentBlob);
  if (!_currentBlob) return;
  try {
    const ctx = await getAudioCtx();
    console.log('[SYL] ctx.state=', ctx.state);
    if (!_currentSylBuf) {
      const ab = await _currentBlob.arrayBuffer();
      _currentSylBuf = await ctx.decodeAudioData(ab);
      console.log('[SYL] decoded', _currentSylBuf.duration.toFixed(1) + 's');
    }
    const dur = _currentSylBuf.duration;
    const start = (dur / total) * sylIdx;
    const len = dur / total;
    const src = ctx.createBufferSource();
    src.buffer = _currentSylBuf;
    src.connect(ctx.destination);
    src.start(0, start, len);
    console.log('[SYL] playing', start.toFixed(2) + 's-' + (start+len).toFixed(2) + 's');
  } catch(e) { console.log('[SYL] ERR', e); }
}