// ── Rehearser voice design controls ─────────────────────────────────────────
// Character development and backend selection resolve the shared Rehearser
// state at interaction time, so they can be loaded as a leaf feature module.

(function (root) {

async function _castDevelop(sp, btn) {
  const script = $('reh-script-text')?.value.trim() || linesToScriptText();
  if (!script) { toast('Load a script first', 'error'); return; }
  const c = rehState.cast[sp];
  const orig = btn.innerHTML;
  btn.disabled = true; btn.innerHTML = '<span class="reh-imsdb-spinner"></span> Developing…';
  try {
    const r = await fetch('/api/analyze-characters', {
      method: 'POST', headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        script, names: [sp],
        llm_url: $('reh-llm-url')?.value.trim() || rehDefaultLlmUrl(),
        model: $('reh-llm-model')?.value || '',
        language: c.lang || $('reh-design-lang')?.value || 'English',
      }),
    });
    if (!r.ok) { const e = await r.json().catch(()=>({})); throw new Error(e.detail || r.statusText); }
    const info = (await r.json()).characters?.[0] || {};
    if (info.gender) c.gender = String(info.gender).toUpperCase().charAt(0).replace(/[^MFN]/, 'N');
    if (info.description) { c.soul = info.description; c.instruct = c.instruct || info.description; }
    renderCastList();
    toast(`Developed ${sp}`, 'success');
  } catch (e) {
    btn.disabled = false; btn.innerHTML = orig;
    toast('Develop failed: ' + e.message, 'error');
  }
}

async function refreshRehBackends() {
  rehInitLlmField();
  const sel = $('reh-backend-select'); if (!sel) return;
  let backends = typeof availableTtsBackends === 'function' ? availableTtsBackends() : [];
  if (!backends.length && typeof refreshTtsBackendAvailability === 'function') {
    await refreshTtsBackendAvailability().catch(() => {});
    backends = typeof availableTtsBackends === 'function' ? availableTtsBackends() : [];
  }
  if (!backends.length && typeof _ttsBackends !== 'undefined' && Array.isArray(_ttsBackends)) backends = _ttsBackends;
  const prev = sel.value || rehState.backend;
  sel.innerHTML = backends.length
    ? backends.map(b => `<option value="${escHtml(b.id)}">${escHtml(b.label)}</option>`).join('')
    : '<option value="">No backend available</option>';
  if (prev && [...sel.options].some(o => o.value === prev)) sel.value = prev;
  else {
    const preferred = ['fishspeech', 'voice_clone', 'customvoice', 'voice_design'];
    const pick = preferred.find(id => [...sel.options].some(o => o.value === id));
    if (pick) sel.value = pick;
  }
  rehState.backend = sel.value || '';
  _checkToneStyleSupport();
}

window._ttsRefreshHooks = window._ttsRefreshHooks || [];
window._ttsRefreshHooks.push(() => {
  const sel = $('reh-backend-select'); if (!sel) return;
  const backends = typeof availableTtsBackends === 'function' ? availableTtsBackends() : [];
  if (!backends.length) return;
  const prev = sel.value || rehState.backend;
  sel.innerHTML = backends.map(b => `<option value="${escHtml(b.id)}">${escHtml(b.label)}</option>`).join('');
  if (prev && [...sel.options].some(o => o.value === prev)) sel.value = prev;
  else if (sel.options.length) sel.value = sel.options[0].value;
  rehState.backend = sel.value || '';
});

Object.assign(root, { _castDevelop, refreshRehBackends });
root.TTVC = root.TTVC || {};
root.TTVC.rehearser = root.TTVC.rehearser || {};
root.TTVC.rehearser.voiceDesign = { develop: _castDevelop, refreshBackends: refreshRehBackends };
})(window);