import { describe, expect, it, vi } from "vitest";
import { pollForLibrary } from "./librarySync";

describe("pollForLibrary", () => {
  it("waits until Navidrome returns indexed tracks", async () => {
    const load = vi.fn()
      .mockRejectedValueOnce(new Error("server is still starting"))
      .mockResolvedValueOnce({ tracks: [] })
      .mockResolvedValueOnce({ tracks: [] })
      .mockResolvedValueOnce({ tracks: [{ id: "real-track" }] });
    const wait = vi.fn().mockResolvedValue(undefined);

    await expect(pollForLibrary(load, { attempts: 5, wait })).resolves.toEqual({
      tracks: [{ id: "real-track" }],
    });
    expect(load).toHaveBeenCalledTimes(4);
    expect(wait).toHaveBeenCalledTimes(3);
  });

  it("returns null when the scan never yields a track", async () => {
    const load = vi.fn().mockResolvedValue({ tracks: [] });
    const wait = vi.fn().mockResolvedValue(undefined);

    await expect(pollForLibrary(load, { attempts: 3, wait })).resolves.toBeNull();
    expect(load).toHaveBeenCalledTimes(3);
  });
});