frontend/src/lib/stores/dashboardStore.ts

/**
 * Dashboard store — fetches and caches dashboard overview data.
 */
import { create } from "zustand";
import { dashboardApi, DashboardOverview } from "@/lib/api";

interface DashboardState {
  data: DashboardOverview | null;
  isLoading: boolean;
  error: string | null;
  lastFetched: number | null;

  fetch: (userId?: string, force?: boolean) => Promise<void>;
  reset: () => void;
}

const CACHE_TTL = 2 * 60 * 1000; // 2 minutes

export const useDashboardStore = create<DashboardState>((set, get) => ({
  data: null,
  isLoading: false,
  error: null,
  lastFetched: null,

  fetch: async (userId, force = false) => {
    const { lastFetched, isLoading } = get();
    if (isLoading) return;
    if (!force && lastFetched && Date.now() - lastFetched < CACHE_TTL) return;

    set({ isLoading: true, error: null });
    try {
      const data = await dashboardApi.overview(userId);
      set({ data, isLoading: false, lastFetched: Date.now() });
    } catch (err) {
      set({ error: (err as Error).message, isLoading: false });
    }
  },

  reset: () => set({ data: null, isLoading: false, error: null, lastFetched: null }),
}));