import { afterEach, describe, expect, it, vi } from "vitest";

import { createRefreshScheduler } from "./refresh";

afterEach(() => {
  vi.useRealTimers();
});

describe("authoritative refresh scheduler", () => {
  it("refetches on connection and coalesces duplicate notifications", async () => {
    vi.useFakeTimers();
    const refresh = vi.fn();
    const scheduler = createRefreshScheduler(refresh, { delayMs: 25 });
    const event = { type: "page.updated" as const, id: "page", version: 5 };

    scheduler.connected();
    vi.advanceTimersByTime(25);
    expect(refresh).toHaveBeenCalledTimes(1);

    scheduler.notified(event);
    scheduler.notified(event);
    vi.advanceTimersByTime(25);
    expect(refresh).toHaveBeenCalledTimes(2);

    scheduler.connected();
    vi.advanceTimersByTime(25);
    expect(refresh).toHaveBeenCalledTimes(3);
    scheduler.dispose();
  });
});