import { useState, useEffect, useCallback } from 'react';
import {
  initializeSherpaTTS,
  speak,
  stop,
  isAvailable,
  addStateListener,
  getState,
  type PiperVoice,
} from '@/services/sherpaTTS';

interface TTSState {
  initialized: boolean;
  initializing: boolean;
  error: string | null;
  isSpeaking: boolean;
}

export function useTTS() {
  const [state, setState] = useState<TTSState>({
    ...getState(),
    isSpeaking: false,
  });

  useEffect(() => {
    const unsubscribe = addStateListener((newState) => {
      setState((prev) => ({
        ...prev,
        ...newState,
      }));
    });

    // In Expo Go mode, don't try to initialize (stub always returns false)
    // This is handled by the stub in sherpaTTS.ts

    return unsubscribe;
  }, []);

  const speakText = useCallback(
    async (text: string, options?: { speed?: number; speakerId?: number }) => {
      // Always return false in Expo Go mode - voice.tsx will use expo-speech instead
      console.log('[useTTS] Sherpa TTS not available in Expo Go');
      return;
    },
    []
  );

  const stopSpeaking = useCallback(() => {
    stop();
    setState((prev) => ({ ...prev, isSpeaking: false }));
  }, []);

  return {
    ...state,
    isReady: false, // Always false in Expo Go mode
    speak: speakText,
    stop: stopSpeaking,
  };
}