import { afterEach, beforeEach, expect, it, vi } from "vitest";
import { createProgressSaver } from "../src/lib/progress";

type Sent = [Record<string, unknown>, number, boolean];

beforeEach(() => vi.useFakeTimers());
afterEach(() => vi.useRealTimers());

it("leading 立即发;间隔内多次 report 合并成一次 trailing", () => {
  const sent: Sent[] = [];
  const s = createProgressSaver((l, p, ka) => {
    sent.push([l, p, ka]);
    return Promise.resolve();
  });
  s.report({ page: 1 }, 0.1);
  expect(sent.length).toBe(1);
  s.report({ page: 2 }, 0.2);
  s.report({ page: 3 }, 0.3);
  expect(sent.length).toBe(1);
  vi.advanceTimersByTime(4999);
  expect(sent.length).toBe(1);
  vi.advanceTimersByTime(1);
  expect(sent.length).toBe(2);
  expect(sent[1]).toEqual([{ page: 3 }, 0.3, false]);
});

it("flush 立刻尾随发送且 keepalive=true;重复值去重;清空挂起", () => {
  const sent: Sent[] = [];
  const s = createProgressSaver((l, p, ka) => {
    sent.push([l, p, ka]);
    return Promise.resolve();
  });
  s.report({ page: 0 }, 0);
  s.report({ page: 5 }, 0.5);
  s.flush();
  expect(sent.length).toBe(2);
  expect(sent[1]).toEqual([{ page: 5 }, 0.5, true]);
  s.flush();
  expect(sent.length).toBe(2);
  vi.advanceTimersByTime(10_000);
  expect(sent.length).toBe(2); // 挂起已被 flush 消费,定时器不再补发
});