import { mount, type VueWrapper } from '@vue/test-utils';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import type { PublicAd } from '../api/client';
import { createViewerI18n } from '../i18n';
import AdCarousel from '../components/ads/AdCarousel.vue';

// 广告轮播组件（Task 10 Step 3）：圆点跳页、关闭 emit、slide 点击新标签打开、
// 4s 自动轮播与指针悬停暂停、单条静态（无圆点）。会话级关闭记忆在 ActivityPage
//（组件只 emit close，无 sessionStorage 副作用）。

function makeAd(id: string): PublicAd {
  return { adId: id, imageUrl: `https://ad.test/${id}.jpg`, linkUrl: `https://link.test/${id}` };
}

const ADS = [makeAd('a'), makeAd('b'), makeAd('c')];

const mounted: VueWrapper[] = [];

/** window.open 桩（记录调用即可）：经工厂推导 spy 类型，绕开 spyOn 泛型约束。 */
function spyWindowOpen() {
  return vi.spyOn(window, 'open').mockReturnValue({} as Window);
}

function mountCarousel(ads: PublicAd[] = ADS): VueWrapper {
  const wrapper = mount(AdCarousel, {
    props: { ads },
    global: { plugins: [createViewerI18n('zh-CN')] },
  });
  mounted.push(wrapper);
  return wrapper;
}

function currentSrc(wrapper: VueWrapper): string | null {
  const img = wrapper.find('.ad-slide img').element as HTMLImageElement | undefined;
  return img?.getAttribute('src') ?? null;
}

describe('AdCarousel', () => {
  let openSpy: ReturnType<typeof spyWindowOpen>;

  beforeEach(() => {
    vi.useFakeTimers();
    openSpy = spyWindowOpen();
  });

  afterEach(() => {
    openSpy.mockRestore();
    while (mounted.length > 0) mounted.pop()?.unmount();
    vi.useRealTimers();
  });

  it('renders the ad badge and switches to the clicked dot', async () => {
    const wrapper = mountCarousel();
    expect(wrapper.get('.ad-badge').text()).toBe('广告');
    expect(currentSrc(wrapper)).toBe('https://ad.test/a.jpg');

    const dots = wrapper.findAll('.ad-dots button');
    expect(dots.length).toBe(3);
    expect(dots[0].attributes('aria-current')).toBe('true'); // 当前项程序化状态
    expect(dots[1].attributes('aria-current')).toBeUndefined();
    await dots[1].trigger('click');
    expect(currentSrc(wrapper)).toBe('https://ad.test/b.jpg');
    expect(dots[1].classes()).toContain('active');
    expect(dots[1].attributes('aria-current')).toBe('true');
    expect(dots[0].attributes('aria-current')).toBeUndefined();
  });

  it('emits close when the ✕ button is clicked', async () => {
    const wrapper = mountCarousel();
    const close = wrapper.get('.ad-close');
    expect(close.attributes('aria-label')).toBe('关闭广告');
    await close.trigger('click');
    expect(wrapper.emitted('close')?.length).toBe(1);
  });

  it('opens the current ad link in a new tab via window.open', async () => {
    const wrapper = mountCarousel();
    await wrapper.get('.ad-slide').trigger('click');
    expect(openSpy).toHaveBeenCalledWith('https://link.test/a', '_blank', 'noopener,noreferrer');
  });

  it('auto-advances every 4s, pauses on pointer enter and resumes on leave', async () => {
    const wrapper = mountCarousel();
    expect(currentSrc(wrapper)).toBe('https://ad.test/a.jpg');

    await vi.advanceTimersByTimeAsync(4000);
    expect(currentSrc(wrapper)).toBe('https://ad.test/b.jpg');

    await wrapper.find('.ad-carousel').trigger('pointerenter');
    await vi.advanceTimersByTimeAsync(8000);
    expect(currentSrc(wrapper)).toBe('https://ad.test/b.jpg'); // 悬停期间不切换

    await wrapper.find('.ad-carousel').trigger('pointerleave');
    await vi.advanceTimersByTimeAsync(4000);
    expect(currentSrc(wrapper)).toBe('https://ad.test/c.jpg'); // 离开自动恢复
  });

  it('switches by horizontal swipe (touch) and cancels the synthetic click', async () => {
    const wrapper = mountCarousel();
    const root = wrapper.find('.ad-carousel');
    await root.trigger('touchstart', { touches: [{ clientX: 200, clientY: 20 }] });
    await root.trigger('touchend', { changedTouches: [{ clientX: 80, clientY: 25 }] });
    expect(currentSrc(wrapper)).toBe('https://ad.test/b.jpg'); // 左滑 → 下一张
    expect(openSpy).not.toHaveBeenCalled(); // 滑动不触发广告打开

    await root.trigger('touchstart', { touches: [{ clientX: 100, clientY: 10 }] });
    await root.trigger('touchend', { changedTouches: [{ clientX: 190, clientY: 12 }] });
    expect(currentSrc(wrapper)).toBe('https://ad.test/a.jpg'); // 右滑 → 上一张
  });

  it('renders a single ad statically without dots or auto rotation', async () => {
    const wrapper = mountCarousel([makeAd('solo')]);
    expect(wrapper.find('.ad-dots').exists()).toBe(false);
    await vi.advanceTimersByTimeAsync(12000);
    expect(currentSrc(wrapper)).toBe('https://ad.test/solo.jpg');
  });
});