import { beforeEach, describe, expect, it, vi } from "vitest";
import { renderHook, waitFor } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import type { ReactNode } from "react";
import { fetchColonyInspections } from "./api";
import { useLastInspection } from "./use-last-inspection";
import { listPacks } from "@/lib/apiaries/offline-pack";
import {
  offlinePack,
  packColony,
  packInspection,
  storedPack,
} from "@/lib/apiaries/offline-pack.fixtures";
import type { Inspection } from "./types";

vi.mock("./api", () => ({ fetchColonyInspections: vi.fn() }));
vi.mock("@/lib/auth/auth-context", () => ({ useCurrentUserId: () => "user-1" }));
vi.mock("@/lib/apiaries/offline-pack", async (importOriginal) => ({
  ...(await importOriginal<typeof import("@/lib/apiaries/offline-pack")>()),
  listPacks: vi.fn(),
}));

function day(isoDay: string): string {
  return `${isoDay}T00:00:00.000Z`;
}

function renderLastInspection(client: QueryClient) {
  const wrapper = ({ children }: { children: ReactNode }) => (
    <QueryClientProvider client={client}>{children}</QueryClientProvider>
  );
  return renderHook(() => useLastInspection("colony-1"), { wrapper });
}

function newClient() {
  return new QueryClient({ defaultOptions: { queries: { retry: false } } });
}

describe("useLastInspection", () => {
  beforeEach(() => {
    vi.mocked(fetchColonyInspections).mockReset();
    vi.mocked(listPacks).mockReset().mockResolvedValue([]);
  });

  it("takes the newest inspection the server has", async () => {
    vi.mocked(fetchColonyInspections).mockResolvedValue([
      { ...packInspection("old", "colony-1", day("2026-09-01")), userId: "u" },
      { ...packInspection("new", "colony-1", day("2026-10-01")), userId: "u" },
    ]);

    const { result } = renderLastInspection(newClient());

    await waitFor(() => expect(result.current.inspection?.id).toBe("new"));
    expect(listPacks).not.toHaveBeenCalled();
  });

  it("reads the last inspection from the loaded pack while offline", async () => {
    vi.mocked(fetchColonyInspections).mockRejectedValue(new TypeError("Failed to fetch"));
    vi.mocked(listPacks).mockResolvedValue([
      storedPack(
        offlinePack({
          colonies: [packColony("colony-1", "A1")],
          inspections: [
            packInspection("p-old", "colony-1", day("2026-09-20")),
            packInspection("p-new", "colony-1", day("2026-10-02")),
            packInspection("other", "colony-2", day("2026-10-05")),
          ],
        }),
      ),
    ]);

    const { result } = renderLastInspection(newClient());

    await waitFor(() => expect(result.current.inspection?.id).toBe("p-new"));
    expect(result.current.isLoading).toBe(false);
  });

  it("shows the colony page's inspections at once while it asks the server again", async () => {
    vi.mocked(fetchColonyInspections).mockReturnValue(new Promise<Inspection[]>(() => undefined));
    const client = newClient();
    client.setQueryData<Inspection[]>(
      ["colonies", "colony-1", "inspections"],
      [{ ...packInspection("cached", "colony-1", day("2026-10-01")), userId: "u" }],
    );

    const { result } = renderLastInspection(client);

    expect(result.current.inspection?.id).toBe("cached");
    expect(result.current.isLoading).toBe(false);
  });
});