// @vitest-environment jsdom
//
// E32 S2: the admin's download-quota editor rendered NOTHING while its quota loaded and nothing when
// the load failed, so the click looked dead. It now opens at once and says which it is. The save
// turns the GB field back into bytes; the reset drops the override.
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { cleanup, fireEvent, render, screen, waitFor } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import type { ReactNode } from "react";
import { api } from "../lib/api";
import { QuotaModal } from "./downloadAdmin";

vi.mock("react-i18next", async (importOriginal) => {
  const actual = await importOriginal<typeof import("react-i18next")>();
  return {
    ...actual,
    useTranslation: () => ({ t: (key: string) => key, i18n: { language: "en" } }),
  };
});

const GiB = 1024 ** 3;
const QUOTA = { max_bytes: 5 * GiB, max_jobs: 10, max_concurrent: 2, unlimited: false };
let qc: QueryClient;
const wrap = (ui: ReactNode) => <QueryClientProvider client={qc}>{ui}</QueryClientProvider>;
const open = (onClose = () => {}) =>
  render(wrap(<QuotaModal userId={4} email="a@b.c" onClose={onClose} />));

beforeEach(() => {
  qc = new QueryClient({ defaultOptions: { queries: { retry: false } } });
});
afterEach(() => {
  cleanup();
  vi.restoreAllMocks();
});

describe("the download-quota editor", () => {
  it("opens at once and says it is loading", () => {
    vi.spyOn(api, "adminGetDownloadQuota").mockReturnValue(new Promise(() => {}) as never);
    open();
    expect(screen.getByText("downloads.admin.quotaTitle")).toBeTruthy();
    expect(screen.getAllByRole("status").length).toBeGreaterThan(0);
  });

  it("says a failed load failed, and retries it", async () => {
    const get = vi
      .spyOn(api, "adminGetDownloadQuota")
      .mockRejectedValueOnce(new Error("down"))
      .mockResolvedValueOnce(QUOTA as never);
    open();
    expect((await screen.findByRole("alert")).textContent).toContain("common.loadError");
    fireEvent.click(screen.getByText("common.retry"));
    await screen.findByDisplayValue("5");
    expect(get).toHaveBeenCalledTimes(2);
  });

  it("gives the first field the focus when the form arrives after a retry", async () => {
    // jsdom lays nothing out, so every element reads as hidden to the dialog's focus rules.
    vi.spyOn(HTMLElement.prototype, "offsetParent", "get").mockReturnValue(document.body);
    vi.spyOn(api, "adminGetDownloadQuota")
      .mockRejectedValueOnce(new Error("down"))
      .mockResolvedValueOnce(QUOTA as never);
    open();
    await screen.findByRole("alert");
    const retry = screen.getByText("common.retry").closest("button")!;
    await waitFor(() => expect(document.activeElement).toBe(retry));
    fireEvent.click(retry); // the Retry gives way to the spinner: its focus must not fall to <body>
    const first = await screen.findByDisplayValue("5");
    await waitFor(() => expect(document.activeElement).toBe(first));
  });

  it("saves the GB field as bytes, and the reset drops the override", async () => {
    vi.spyOn(api, "adminGetDownloadQuota").mockResolvedValue(QUOTA as never);
    const set = vi.spyOn(api, "adminSetDownloadQuota").mockResolvedValue(QUOTA as never);
    const reset = vi.spyOn(api, "adminResetDownloadQuota").mockResolvedValue(QUOTA as never);
    const onClose = vi.fn();
    open(onClose);
    fireEvent.change(await screen.findByDisplayValue("5"), { target: { value: "1.5" } });
    fireEvent.click(screen.getByText("downloads.admin.save"));
    await waitFor(() => expect(onClose).toHaveBeenCalledTimes(1));
    expect(set).toHaveBeenCalledWith(4, {
      max_bytes: Math.round(1.5 * GiB),
      max_jobs: 10,
      max_concurrent: 2,
      unlimited: false,
    });

    fireEvent.click(screen.getByText("downloads.admin.reset"));
    await waitFor(() => expect(reset).toHaveBeenCalledWith(4));
  });
});