import { create } from 'zustand';
import AsyncStorage from '@react-native-async-storage/async-storage';

/**
 * Persistente User-Preference für Lyra-TTS-Auto-Play.
 *
 * Default OFF — User aktiviert einmal in der Welcome-Slide via Audio-Button,
 * danach playt Lyra auf jeder Slide automatisch. Erneutes Tappen disabled
 * + stoppt aktuelles Playback.
 *
 * Persistence: AsyncStorage @rebreak/lyraVoiceEnabled. Init beim App-Start
 * via `init()` (analog zu language/theme/appLock-Stores).
 */

const STORAGE_KEY = '@rebreak/lyraVoiceEnabled';

type LyraVoiceState = {
  enabled: boolean;
  ready: boolean;
  init: () => Promise<void>;
  setEnabled: (enabled: boolean) => Promise<void>;
  toggle: () => Promise<void>;
  reset: () => Promise<void>;
};

export const useLyraVoiceStore = create<LyraVoiceState>((set, get) => ({
  enabled: false,
  ready: false,

  init: async () => {
    try {
      const stored = await AsyncStorage.getItem(STORAGE_KEY);
      set({ enabled: stored === '1', ready: true });
    } catch {
      set({ enabled: false, ready: true });
    }
  },

  setEnabled: async (enabled: boolean) => {
    set({ enabled });
    try {
      await AsyncStorage.setItem(STORAGE_KEY, enabled ? '1' : '0');
    } catch {
      // ignore — in-memory state ist wichtiger
    }
  },

  toggle: async () => {
    const next = !get().enabled;
    await get().setEnabled(next);
  },

  reset: async () => {
    set({ enabled: false });
    try {
      await AsyncStorage.removeItem(STORAGE_KEY);
    } catch {}
  },
}));