src/utils/speech.ts

export function canSpeak() {
  return typeof window !== 'undefined' && 'speechSynthesis' in window && 'SpeechSynthesisUtterance' in window;
}

export function stopSpeaking() {
  if (!canSpeak()) return;
  window.speechSynthesis.cancel();
}

export function speakGuideText(text: string, onEnd: () => void) {
  if (!canSpeak()) return false;

  window.speechSynthesis.cancel();

  const utterance = new SpeechSynthesisUtterance(text);
  utterance.rate = 0.92;
  utterance.pitch = 1;
  utterance.volume = 1;
  utterance.lang = 'en-US';
  utterance.onend = onEnd;
  utterance.onerror = onEnd;

  window.speechSynthesis.speak(utterance);
  return true;
}