import { useCallback, useState } from 'react';
import { toast } from 'react-hot-toast';
import { syncOfflineOperations, fetchAndCacheItems } from '@/lib/sync';

interface UseSyncOptions {
  isOnline: boolean;
  currentUser: any;
  onInventoryUpdate?: (items: any[]) => void;
}

export function useSync(options: UseSyncOptions) {
  const { isOnline, currentUser, onInventoryUpdate } = options;
  const [syncing, setSyncing] = useState(false);

  const handleSync = useCallback(async () => {
    if (!isOnline || !currentUser) return;
    setSyncing(true);
    try {
      const result = await syncOfflineOperations(currentUser.id);
      if (result.success > 0) {
        toast.success(`Synced ${result.success} operations!`);
      }
      const fresh = await fetchAndCacheItems();
      if (onInventoryUpdate) {
        onInventoryUpdate(fresh);
      }
    } catch (error) {
      console.error("Sync failed", error);
      toast.error("Sync failed");
    } finally {
      setSyncing(false);
    }
  }, [isOnline, currentUser, onInventoryUpdate]);

  return {
    syncing,
    handleSync
  };
}