import { describe, it, expect } from "vitest";
import { channelDetailPollMs } from "./channelDetailPoll";
import { type ChannelDetail } from "./api";

// Only deep_requested + backfill_done drive the decision; cast a partial for the pure predicate.
const d = (over: Partial<ChannelDetail>): ChannelDetail => over as ChannelDetail;

describe("channelDetailPollMs", () => {
  it("polls at 4s while THIS user's full-history backfill is running", () => {
    expect(channelDetailPollMs(d({ deep_requested: true, backfill_done: false }))).toBe(4000);
  });

  it("stops (false) once the back-catalogue is fully in", () => {
    expect(channelDetailPollMs(d({ deep_requested: true, backfill_done: true }))).toBe(false);
  });

  it("stops (false) when the user hasn't requested full history", () => {
    expect(channelDetailPollMs(d({ deep_requested: false, backfill_done: false }))).toBe(false);
  });

  it("stops (false) before the detail has loaded", () => {
    expect(channelDetailPollMs(undefined)).toBe(false);
  });
});