// Shared voice input + TTS for sub-apps. Requires authH() to be defined by the host page.
var _appSendFn = null;
var _isRecording = false;
var _speechRecog = null;
var _micAutosend = true;
var _ttsAudio = null;
var _ttsBtnActive = null;

function initAppVoice(sendFn) {
  _appSendFn = sendFn || null;
}

function toggleMicRecording() {
  if (_isRecording) stopMicRecording();
  else startMicRecording();
}

function startMicRecording() {
  var SpeechRecog = window.SpeechRecognition || window.webkitSpeechRecognition;
  if (!SpeechRecog) { alert('이 브라우저는 음성 인식을 지원하지 않습니다.\nChrome을 사용해주세요.'); return; }
  _speechRecog = new SpeechRecog();
  _speechRecog.lang = 'ko-KR';
  _speechRecog.interimResults = false;
  _speechRecog.maxAlternatives = 1;
  _speechRecog.continuous = false;
  var btn = document.getElementById('mic-btn');
  _speechRecog.onstart = function() {
    _isRecording = true;
    if (btn) { btn.textContent = '⏹'; btn.title = '말하는 중… (클릭 시 중지)'; btn.classList.add('recording'); }
  };
  _speechRecog.onresult = function(e) {
    var transcript = e.results[0][0].transcript;
    var input = document.getElementById('chat-input');
    if (input && transcript) {
      input.value = (input.value ? input.value + ' ' : '') + transcript;
      input.focus();
      input.dispatchEvent(new Event('input'));
      if (_micAutosend && _appSendFn) setTimeout(function() { _appSendFn(); }, 50);
    }
  };
  _speechRecog.onerror = function(e) {
    if (e.error !== 'no-speech') alert('음성 인식 오류: ' + e.error);
  };
  _speechRecog.onend = function() {
    _isRecording = false;
    _speechRecog = null;
    if (btn) { btn.textContent = '🎤'; btn.title = '음성 입력'; btn.classList.remove('recording'); }
  };
  _speechRecog.start();
}

function stopMicRecording() {
  if (_speechRecog) _speechRecog.stop();
}

function playTTSText(btn, text) {
  text = (text || '').replace(/```[\s\S]*?```/g, '').replace(/[#*`_~>]/g, ' ').replace(/\s+/g, ' ').trim();
  if (!text) return;
  if (_ttsBtnActive === btn && _ttsAudio) {
    _ttsAudio.pause(); _ttsAudio = null;
    btn.textContent = '🔊'; btn.classList.remove('playing');
    _ttsBtnActive = null; return;
  }
  if (_ttsAudio) { _ttsAudio.pause(); _ttsAudio = null; }
  if (_ttsBtnActive) { _ttsBtnActive.textContent = '🔊'; _ttsBtnActive.classList.remove('playing'); }
  btn.textContent = '⌛'; btn.classList.add('playing');
  _ttsBtnActive = btn;
  fetch('/api/voice/tts', {
    method: 'POST',
    headers: Object.assign({ 'Content-Type': 'application/json' }, typeof authH === 'function' ? authH() : {}),
    credentials: 'include',
    body: JSON.stringify({ text: text.slice(0, 2000) }),
  })
  .then(function(r) { if (!r.ok) throw new Error(r.status); return r.blob(); })
  .then(function(blob) {
    var url = URL.createObjectURL(blob);
    _ttsAudio = new Audio(url);
    _ttsAudio.onended = function() { URL.revokeObjectURL(url); _ttsAudio = null; btn.textContent = '🔊'; btn.classList.remove('playing'); _ttsBtnActive = null; };
    _ttsAudio.onerror = function() { URL.revokeObjectURL(url); _ttsAudio = null; btn.textContent = '🔊'; btn.classList.remove('playing'); _ttsBtnActive = null; };
    btn.textContent = '⏹'; _ttsAudio.play();
  })
  .catch(function() { btn.textContent = '🔊'; btn.classList.remove('playing'); _ttsBtnActive = null; });
}