import { useState, useEffect, useCallback } from 'react';
import { createMMKV } from 'react-native-mmkv';
import { fileStore } from '../services/fileStore';
import { safDirectory } from '../services/safDirectory';
import { useDeviceFiles } from './useDeviceFiles';

const syncStateStorage = createMMKV({ id: 'vaultdrop-sync-state' });

export function getIsSyncing(): boolean {
  return syncStateStorage.getString('is_syncing') === 'true';
}

export function setIsSyncing(value: boolean) {
  syncStateStorage.set('is_syncing', value ? 'true' : 'false');
}

export function useSyncQueue() {
  const [pendingCount, setPendingCount] = useState(0);
  const [isSyncing, setIsSyncingState] = useState(() => getIsSyncing());
  const { folders } = useDeviceFiles();

  const refresh = useCallback(() => {
    const globalMode = safDirectory.getGlobalSyncMode();

    if (globalMode === 'off') {
      setPendingCount(0);
      setIsSyncingState(getIsSyncing());
      return;
    }

    const registry = fileStore.getPendingSync();
    let count = 0;

    for (const entry of registry) {
      if (globalMode === 'auto') {
        count++;
      } else {
        // mode manuel : uniquement les fichiers des dossiers en mode auto
        if (!entry.parentFileId) continue;
        const folder = safDirectory.getAll().find((f) => f.id === entry.parentFileId);
        if (folder && folder.syncMode === 'auto') {
          count++;
        }
      }
    }

    setPendingCount(count);
    setIsSyncingState(getIsSyncing());
  }, []);

  useEffect(() => {
    refresh();
    const interval = setInterval(refresh, 5000);
    return () => clearInterval(interval);
  }, [refresh]);

  return { pendingCount, isSyncing, refresh };
}