/**
 * Hook for fetching lore status data via Tauri IPC.
 *
 * Uses TanStack Query for caching and state management.
 * The data can be refreshed via query invalidation when
 * lore-data-changed events are received.
 */

import { useQuery } from "@tanstack/react-query";
import { getLoreStatus } from "@/lib/tauri";
import type { LoreStatus } from "@/lib/bindings";

export interface UseLoreDataResult {
  data: LoreStatus | undefined;
  isLoading: boolean;
  error: Error | null;
  refetch: () => void;
}

/**
 * Fetch lore status data from the Tauri backend.
 *
 * Returns the current lore status including health, last sync time,
 * and summary counts (open issues, authored MRs, reviewing MRs).
 */
export function useLoreData(): UseLoreDataResult {
  const query = useQuery({
    queryKey: ["lore-status"],
    queryFn: async (): Promise<LoreStatus> => {
      const result = await getLoreStatus();

      if (result.status === "error") {
        throw new Error(result.error.message);
      }

      return result.data;
    },
    refetchInterval: false, // Manual refetch on lore-data-changed
    staleTime: 30_000, // Consider data fresh for 30 seconds
  });

  return {
    data: query.data,
    isLoading: query.isLoading,
    error: query.error,
    refetch: query.refetch,
  };
}