// @vitest-environment jsdom
//
// The Settings prefs are seeded from the account's server prefs in the `me` cache — BootGate mounts the
// tree only once it is there. The adopt effect this replaced corrected them AFTER mounting; with it
// gone, a seed that read only this browser's copy would never show a performance mode or hints setting
// changed on another device. And the seed is not an edit: it must not be saved straight back.
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { act, cleanup, render } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { PrefsProvider } from "./PrefsProvider";
import { usePrefs } from "./prefsContext";
import { api } from "../lib/api";
import { ACTIVE_ACCOUNT_KEY } from "../lib/activeAccount";
import { accountKey, LS } from "../lib/storage";
import { qk } from "../lib/queryKeys";

const seen: { perf: boolean; hints: boolean }[] = [];
function Probe() {
  const { perf, hints } = usePrefs();
  seen.push({ perf, hints });
  return null;
}

beforeEach(() => {
  localStorage.clear();
  sessionStorage.setItem(ACTIVE_ACCOUNT_KEY, "5");
  seen.length = 0;
  vi.useFakeTimers();
});
afterEach(() => {
  cleanup();
  vi.useRealTimers();
  vi.restoreAllMocks();
});

describe("PrefsProvider seed", () => {
  it("renders the account's server prefs from the first render, and does not save them back", () => {
    localStorage.setItem(accountKey(LS.perfMode, 5)!, "0"); // this browser last had it off
    localStorage.setItem(accountKey(LS.hints, 5)!, "1");
    const save = vi.spyOn(api, "savePrefs").mockResolvedValue(undefined as never);
    const qc = new QueryClient();
    qc.setQueryData(qk.me(), { id: 5, preferences: { performanceMode: true, hints: false } });
    render(
      <QueryClientProvider client={qc}>
        <PrefsProvider>
          <Probe />
        </PrefsProvider>
      </QueryClientProvider>,
    );

    expect(seen[0]).toEqual({ perf: true, hints: false });
    // past the auto-save debounce
    act(() => {
      vi.advanceTimersByTime(1000);
    });
    expect(save).not.toHaveBeenCalled();
  });
});