import { readFileSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import { flushPromises, mount, type VueWrapper } from '@vue/test-utils';
import { defineComponent, nextTick, reactive, ref, type Ref } from 'vue';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import {
  ApiError,
  getPublicPhoto,
  getPublicPhotos,
  postLikeBatch,
  type PublicPhoto,
  type PublicPhotoList,
} from '../api/client';
import { createViewerI18n, type ViewerI18n } from '../i18n';
import PhotoLightbox from '../components/PhotoLightbox.vue';
import type { DownloadController } from '../download/useDownload';
import { usePhotoSequence, type PhotoSequence } from '../feed/sequence';
import { useLikes } from '../likes/useLikes';
import type { LikeBubble } from '../realtime/useAlbumRealtime';

// PhotoLightbox 组件测试（Task 8 业务 + UI-02 V04 深色布局）：
// browse 渲染/导航/序列扩展、wheel 缩放与双击复位、Esc/关闭/舞台空白点击关闭、
// 指针轻扫切换、签名过期静默重取与 404 移除上报；V04 新增：位置计数三种
// 真实回退、缩略图条渲染与选择、更多菜单、焦点管理、body 滚动锁、安全区；
// V05 新增（独立 describe）：本地点赞/他人点赞 → 心形粒子与跨照片互动提示
// 分层、navigator.share 分享与剪贴板回退、下载失败归属照片。深链解析与 URL
// 同步在 viewer-route.spec（真实路由）覆盖。

vi.mock('../api/client', async (importOriginal) => {
  const actual = await importOriginal<typeof import('../api/client')>();
  return { ...actual, getPublicPhotos: vi.fn(), getPublicPhoto: vi.fn(), postLikeBatch: vi.fn() };
});

const mockedGetPublicPhotos = vi.mocked(getPublicPhotos);
const mockedGetPublicPhoto = vi.mocked(getPublicPhoto);
const mockedPostLikeBatch = vi.mocked(postLikeBatch);

function makePhoto(id: string, likeCount = 0): PublicPhoto {
  return {
    photoId: id,
    width: 800,
    height: 500,
    thumb: { url: `http://img.test/${id}-thumb.jpg?s=1`, expiresAt: '2026-10-01T00:00:00.000Z' },
    browse: { url: `http://img.test/${id}-browse.jpg?s=1`, expiresAt: '2026-10-01T00:00:00.000Z' },
    likeCount,
    publishedAt: '2026-10-01T00:00:00.000Z',
  };
}

function makeList(items: PublicPhoto[], nextCursor: string | null = null): PublicPhotoList {
  return { items, nextCursor, hasMore: nextCursor !== null };
}

let i18n: ViewerI18n;
const mounted: VueWrapper[] = [];

/** 宿主：sequence + v-model photoId（镜像 ActivityPage 组装）。页面数据经
 * mockedGetPublicPhotos 的当前 mock 队列供给（与真实时序一致：挂载后到达）。
 * solo：深链兜底条目（ensureInSequence 追加在序列尾部，自然位置未知）。 */
function mountLightbox(photoId: string, options: { solo?: PublicPhoto } = {}): VueWrapper {
  const Host = defineComponent({
    components: { PhotoLightbox },
    setup() {
      const sequence = usePhotoSequence({
        token: ref('tok-lb'),
        locale: ref('zh-CN'),
        category: ref(null),
      });
      if (options.solo !== undefined) sequence.ensureInSequence(options.solo);
      const current = ref(photoId);
      return { sequence, photoId: current };
    },
    template: `<PhotoLightbox v-model:photo-id="photoId" :sequence="sequence" />`,
  });
  const wrapper = mount(Host, { global: { plugins: [i18n] } });
  mounted.push(wrapper);
  return wrapper;
}

function lightbox(wrapper: VueWrapper): VueWrapper<Record<string, never>> {
  return wrapper.getComponent(PhotoLightbox) as unknown as VueWrapper<Record<string, never>>;
}

function img(wrapper: VueWrapper) {
  return wrapper.find('img.photo');
}

/** jsdom 无 PointerEvent 构造器：MouseEvent 补 pointerId/pointerType 字段。 */
function pointerEvent(
  type: 'pointerdown' | 'pointermove' | 'pointerup',
  init: { pointerId?: number; clientX?: number; clientY?: number; pointerType?: string },
): PointerEvent {
  const event = new MouseEvent(type, {
    bubbles: true,
    cancelable: true,
    clientX: init.clientX ?? 0,
    clientY: init.clientY ?? 0,
  });
  return Object.assign(event, {
    pointerId: init.pointerId ?? 1,
    pointerType: init.pointerType ?? 'touch',
  }) as unknown as PointerEvent;
}

function keydown(key: string): void {
  window.dispatchEvent(new KeyboardEvent('keydown', { key, cancelable: true }));
}

/** test-utils 的 trigger 无法写 MouseEvent 只读坐标：直接派生 WheelEvent。 */
function wheel(wrapper: VueWrapper, deltaY: number, clientX = 100, clientY = 80): void {
  wrapper.find('.photo-viewer').element.dispatchEvent(
    new WheelEvent('wheel', { bubbles: true, cancelable: true, deltaY, clientX, clientY }),
  );
}

describe('photo lightbox (Task 8)', () => {
  beforeEach(() => {
    localStorage.clear();
    i18n = createViewerI18n('zh-CN');
    mockedGetPublicPhotos.mockReset().mockResolvedValue(makeList([makePhoto('p1'), makePhoto('p2'), makePhoto('p3')]));
    mockedGetPublicPhoto.mockReset();
  });

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

  it('renders the current browse url with position indicator and like count', async () => {
    mockedGetPublicPhotos.mockResolvedValue(
      makeList([makePhoto('p1'), makePhoto('p2', 7), makePhoto('p3')]),
    );
    const wrapper = mountLightbox('p2');
    await flushPromises();

    expect(img(wrapper).attributes('src')).toBe('http://img.test/p2-browse.jpg?s=1');
    // 3 张全部加载完成（无更多页）→ 筛选序列 i / n（§5.2）。
    expect(wrapper.find('.position-indicator').text()).toBe('2 / 3');
    // 底部操作栏（V04）：Like 计数 + Like/Share 标签（无下载控制器 → 下载位省略）。
    expect(wrapper.find('.like-count').text()).toBe('7');
    expect(wrapper.findAll('.action-label').map((label) => label.text())).toEqual(['点赞', '分享']);
  });

  it('navigates with buttons and arrow keys, keeping the list order', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();

    await wrapper.find('.nav.next').trigger('click');
    expect(lightbox(wrapper).emitted('update:photoId')).toEqual([['p3']]);

    keydown('ArrowLeft');
    await flushPromises();
    expect(lightbox(wrapper).emitted('update:photoId')).toEqual([['p3'], ['p2']]);

    keydown('ArrowLeft');
    await flushPromises();
    expect(lightbox(wrapper).emitted('update:photoId')).toEqual([['p3'], ['p2'], ['p1']]);

    // 首张：previous 按钮禁用，再按左键不再发事件；末张同理（无更多页）。
    expect(wrapper.find('.nav.prev').attributes('disabled')).toBeDefined();
    keydown('ArrowLeft');
    await flushPromises();
    expect(lightbox(wrapper).emitted('update:photoId')).toHaveLength(3);
    expect(wrapper.find('.nav.next').attributes('disabled')).toBeUndefined();
  });

  it('closes on Esc, close button and empty-stage click', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();

    keydown('Escape');
    expect(lightbox(wrapper).emitted('close')).toHaveLength(1);

    await wrapper.find('.viewer-close').trigger('click');
    expect(lightbox(wrapper).emitted('close')).toHaveLength(2);

    // 舞台空白区（目标=容器自身，非 <img>）点击关闭。
    await wrapper.find('.image-container').trigger('click');
    expect(lightbox(wrapper).emitted('close')).toHaveLength(3);
  });

  it('zooms with wheel around the cursor and clamps to [1, 4]; dblclick resets', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();

    // jsdom 下容器 rect 为 0 → 锚点 = 事件坐标（100, 80）。
    wheel(wrapper, -240);
    await nextTick();
    let style = img(wrapper).attributes('style') ?? '';
    expect(style).toContain('scale(');
    const zoomedScale = Number(/scale\(([\d.]+)\)/.exec(style)?.[1]);
    expect(zoomedScale).toBeGreaterThan(1);
    // 不动点：锚点屏幕位置不变（translate 补偿）。
    const zoomedTx = Number(/translate\((-?[\d.]+)px/.exec(style)?.[1]);
    expect(100 * zoomedScale + zoomedTx).toBeCloseTo(100, 5);

    // 连续放大钳制到 4。
    for (let i = 0; i < 8; i++) wheel(wrapper, -600);
    await nextTick();
    style = img(wrapper).attributes('style') ?? '';
    expect(Number(/scale\(([\d.]+)\)/.exec(style)?.[1])).toBe(4);

    // 缩到底回到 1 且平移归零（复位对齐）。
    for (let i = 0; i < 12; i++) wheel(wrapper, 600);
    await nextTick();
    style = img(wrapper).attributes('style') ?? '';
    expect(style).toContain('translate(0px, 0px) scale(1)');

    // 双击复位。
    wheel(wrapper, -240);
    await nextTick();
    await img(wrapper).trigger('dblclick');
    expect(img(wrapper).attributes('style')).toContain('scale(1)');
  });

  it('swipe navigates when flat; drag on stage does not close', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();
    const root = wrapper.find('.photo-viewer');

    // 左滑 80px → 下一张。
    root.element.dispatchEvent(pointerEvent('pointerdown', { pointerId: 1, clientX: 200, clientY: 150 }));
    root.element.dispatchEvent(pointerEvent('pointermove', { pointerId: 1, clientX: 150, clientY: 150 }));
    root.element.dispatchEvent(pointerEvent('pointerup', { pointerId: 1, clientX: 120, clientY: 150 }));
    await flushPromises();
    expect(lightbox(wrapper).emitted('update:photoId')).toEqual([['p3']]);

    // 拖拽距离超过阈值后收尾在舞台上：click 不关闭。
    root.element.dispatchEvent(pointerEvent('pointerdown', { pointerId: 1, clientX: 200, clientY: 150 }));
    root.element.dispatchEvent(pointerEvent('pointermove', { pointerId: 1, clientX: 100, clientY: 160 }));
    root.element.dispatchEvent(pointerEvent('pointerup', { pointerId: 1, clientX: 100, clientY: 160 }));
    await wrapper.find('.image-container').trigger('click');
    expect(lightbox(wrapper).emitted('close')).toBeUndefined();
  });

  it('extends the sequence when navigating past the end with more pages', async () => {
    let resolvePage!: (value: PublicPhotoList) => void;
    mockedGetPublicPhotos.mockReset();
    mockedGetPublicPhotos
      .mockResolvedValueOnce(makeList([makePhoto('p1'), makePhoto('p2'), makePhoto('p3')], 'cur-1'))
      .mockReturnValueOnce(
        new Promise<PublicPhotoList>((resolve) => {
          resolvePage = resolve;
        }),
      );
    const wrapper = mountLightbox('p2');
    await flushPromises();

    // 临近末尾的预取已在途（受控 promise 挂起）→ 右切越过末尾与预取共用同一请求。
    await wrapper.find('.nav.next').trigger('click'); // → p3（预取仍未完成）
    expect(lightbox(wrapper).emitted('update:photoId')).toEqual([['p3']]);

    await wrapper.find('.nav.next').trigger('click'); // 越过末尾：等待扩展
    expect(lightbox(wrapper).emitted('update:photoId')).toEqual([['p3']]); // 未落地前不切换
    expect(wrapper.find('.loading').exists()).toBe(true);

    resolvePage(makeList([makePhoto('p4')], null));
    await flushPromises();
    expect(lightbox(wrapper).emitted('update:photoId')).toEqual([['p3'], ['p4']]);
    expect(mockedGetPublicPhotos).toHaveBeenCalledTimes(2);
  });

  it('silently refreshes an expired signed url on img error', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();
    mockedGetPublicPhoto.mockResolvedValue({
      ...makePhoto('p2'),
      categoryId: null,
      browse: { url: 'http://img.test/p2-browse.jpg?s=2', expiresAt: '2026-10-01T01:00:00.000Z' },
    });

    await img(wrapper).trigger('error');
    await flushPromises();

    expect(mockedGetPublicPhoto).toHaveBeenCalledWith('tok-lb', 'p2');
    expect(img(wrapper).attributes('src')).toBe('http://img.test/p2-browse.jpg?s=2');
  });

  it('reports removal with the pre-removal index when the photo is gone (404)', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();
    mockedGetPublicPhoto.mockRejectedValue(new ApiError('PHOTO_NOT_PUBLIC', 'gone', 404, 'req-1'));

    await img(wrapper).trigger('error');
    await flushPromises();

    expect(lightbox(wrapper).emitted('removed')).toEqual([['p2', 1]]);
    expect((wrapper.vm as unknown as { sequence: PhotoSequence }).sequence.photos.map((p) => p.photoId)).toEqual(['p1', 'p3']);
  });

  it('shows a retryable failure notice for non-404 refresh failures', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();
    mockedGetPublicPhoto.mockRejectedValue(new ApiError('NETWORK_ERROR', 'down', 0, null));

    await img(wrapper).trigger('error');
    await flushPromises();
    expect(wrapper.find('.img-failed[role="alert"]').text()).toContain('图片加载失败');

    // 重试：清标记并强制 <img> 重挂载（key 变化），错误链可再次触发。
    mockedGetPublicPhoto.mockResolvedValue({
      ...makePhoto('p2'),
      categoryId: null,
      browse: { url: 'http://img.test/p2-browse.jpg?s=3', expiresAt: '2026-10-01T02:00:00.000Z' },
    });
    await wrapper.find('.img-failed button').trigger('click');
    await nextTick();
    expect(wrapper.find('.img-failed').exists()).toBe(false); // 占位收起，img 回到加载中
    expect(img(wrapper).exists()).toBe(true);
    await img(wrapper).trigger('error');
    await flushPromises();
    expect(img(wrapper).attributes('src')).toBe('http://img.test/p2-browse.jpg?s=3');
  });
});

describe('photo lightbox dark viewer (UI-02 V04)', () => {
  beforeEach(() => {
    localStorage.clear();
    i18n = createViewerI18n('zh-CN');
    mockedGetPublicPhotos.mockReset().mockResolvedValue(makeList([makePhoto('p1'), makePhoto('p2'), makePhoto('p3')]));
    mockedGetPublicPhoto.mockReset();
    document.body.style.overflow = '';
  });

  afterEach(() => {
    while (mounted.length > 0) {
      mounted.pop()?.unmount();
    }
    vi.restoreAllMocks();
    document.body.style.overflow = '';
    document.documentElement.className = '';
  });

  it('shows the loaded-count fallback while more pages remain (no fake total)', async () => {
    let resolvePage!: (value: PublicPhotoList) => void;
    mockedGetPublicPhotos.mockReset();
    mockedGetPublicPhotos
      .mockResolvedValueOnce(makeList([makePhoto('p1'), makePhoto('p2')], 'cur-1'))
      .mockReturnValueOnce(
        new Promise<PublicPhotoList>((resolve) => {
          resolvePage = resolve;
        }),
      );
    const wrapper = mountLightbox('p2');
    await flushPromises();

    // 未到末页且接口无 total → 「已加载 N 张」（§5.2），不显示 i/n。
    expect(wrapper.find('.position-indicator').text()).toBe('已加载 2 张');

    resolvePage(makeList([makePhoto('p3')], null));
    await flushPromises();
    // 全部加载完成 → 当前筛选序列 i / n。
    expect(wrapper.find('.position-indicator').text()).toBe('2 / 3');
  });

  it('shows photo preview for an unpositioned solo deep-link entry', async () => {
    const wrapper = mountLightbox('solo-9', { solo: makePhoto('solo-9') });
    await flushPromises();

    // solo 自然位置未知（首页加载后仍追加在尾部）→ 「照片预览」，不伪造排名。
    expect(wrapper.find('.position-indicator').text()).toBe('照片预览');
  });

  it('renders the thumbnail strip window and selects without extra history entries', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();

    // 3 张全部落在 ±3 窗口内；当前项描边 + aria-current；点击只上抛切换。
    const thumbs = wrapper.findAll('.thumb');
    expect(thumbs.map((thumb) => thumb.find('img').attributes('src'))).toEqual([
      'http://img.test/p1-thumb.jpg?s=1',
      'http://img.test/p2-thumb.jpg?s=1',
      'http://img.test/p3-thumb.jpg?s=1',
    ]);
    expect(thumbs[1].classes()).toContain('current');
    expect(thumbs[1].attributes('aria-current')).toBe('true');

    await thumbs[0].trigger('click');
    expect(lightbox(wrapper).emitted('update:photoId')).toEqual([['p1']]);
  });

  it('more menu exposes the reduce-motion toggle; Escape closes the menu before the viewer', async () => {
    const wrapper = mountLightbox('p2');
    await flushPromises();

    await wrapper.find('.viewer-more').trigger('click');
    expect(wrapper.find('.more-popover').exists()).toBe(true);
    const item = wrapper.find('.more-item');
    expect(item.text()).toContain('减少动画');
    expect(item.attributes('aria-checked')).toBe('false');
    await item.trigger('click');
    expect(wrapper.find('.more-item').attributes('aria-checked')).toBe('true');
    // 还原模块级偏好单例，避免影响后续用例。
    await wrapper.find('.more-item').trigger('click');

    keydown('Escape');
    await flushPromises();
    expect(wrapper.find('.more-popover').exists()).toBe(false); // 先收菜单
    expect(lightbox(wrapper).emitted('close')).toBeUndefined(); // 不关查看器

    keydown('Escape');
    await flushPromises();
    expect(lightbox(wrapper).emitted('close')).toHaveLength(1);
  });

  it('moves focus into the dialog on open and returns it to the trigger on close', async () => {
    const trigger = document.createElement('button');
    document.body.appendChild(trigger);
    trigger.focus();

    const wrapper = mountLightbox('p2');
    // jsdom 下脱离文档的元素 focus() 不改 activeElement：赶在调度器微任务
    // （rootEl watcher 调 focus）之前同步挂进文档。
    document.body.appendChild(wrapper.element);
    await flushPromises();

    const root = wrapper.find('.photo-viewer');
    expect(root.attributes('role')).toBe('dialog');
    expect(root.attributes('aria-modal')).toBe('true');
    expect(root.attributes('tabindex')).toBe('-1');
    expect(root.attributes('aria-label')).toBe('照片查看器');
    expect(document.activeElement).toBe(root.element);

    // 手动卸载（绕过 mounted 清单）验证焦点归还触发元素。
    const index = mounted.indexOf(wrapper);
    if (index >= 0) mounted.splice(index, 1);
    wrapper.unmount();
    expect(document.activeElement).toBe(trigger);
    trigger.remove();
  });

  // UI-02 Task 6 无障碍抽检（§5.3）：Tab 循环困于对话框——两端折回，不穿透。
  it('traps Tab focus inside the dialog (wrap-around at both ends)', async () => {
    const wrapper = mountLightbox('p2');
    document.body.appendChild(wrapper.element);
    await flushPromises();

    const focusables = Array.from(
      wrapper.element.querySelectorAll('button:not([disabled])'),
    ).filter((el): el is HTMLElement => el instanceof HTMLElement);
    expect(focusables.length).toBeGreaterThan(1);
    const first = focusables[0]!;
    const last = focusables[focusables.length - 1]!;

    // 末元素正向 Tab → 折回首元素。
    last.focus();
    last.dispatchEvent(new KeyboardEvent('keydown', { key: 'Tab', bubbles: true, cancelable: true }));
    expect(document.activeElement).toBe(first);

    // 首元素 Shift+Tab → 折回末元素。
    first.focus();
    first.dispatchEvent(
      new KeyboardEvent('keydown', { key: 'Tab', shiftKey: true, bubbles: true, cancelable: true }),
    );
    expect(document.activeElement).toBe(last);
  });

  it('locks body scroll while open and restores the previous value on close', async () => {
    document.body.style.overflow = 'auto';
    const wrapper = mountLightbox('p2');
    await flushPromises();
    expect(document.body.style.overflow).toBe('hidden');

    const index = mounted.indexOf(wrapper);
    if (index >= 0) mounted.splice(index, 1);
    wrapper.unmount();
    expect(document.body.style.overflow).toBe('auto');
  });

  it('applies dvh viewport height and safe-area insets for the immersive layout', () => {
    // vitest 不加载 SFC 样式：源级断言（与 viewer-shell 的 token 源级断言同法）。
    const source = readFileSync(
      join(dirname(fileURLToPath(import.meta.url)), '..', 'components', 'PhotoLightbox.vue'),
      'utf8',
    );
    expect(source).toContain('100dvh');
    expect(source).toContain('env(safe-area-inset-top, 0px)');
    expect(source).toContain('env(safe-area-inset-bottom, 0px)');
  });

  it('layers the fullscreen overlay above the sticky topbar (close button clickable)', () => {
    // jsdom 无布局：源级断言（同上）。覆盖层 z=200 须高于 sticky 顶栏 z=120
    // （App.vue）——否则顶栏盖住关闭按钮的可点区（e2e 曾拦截 click 的真实回归）。
    const source = readFileSync(
      join(dirname(fileURLToPath(import.meta.url)), '..', 'components', 'PhotoLightbox.vue'),
      'utf8',
    );
    expect(source).toMatch(/\.photo-viewer\s*\{[^}]*z-index:\s*200/s);
  });
});

describe('photo lightbox interactions (UI-02 V05)', () => {
  interface V05Options {
    bubbles?: LikeBubble[];
    download?: unknown;
    albumTitle?: string;
    shareUrl?: string;
  }

  /** 宿主：sequence + likes + 实时气泡 ref + v-model photoId（镜像 ActivityPage
   * 的 V05 组装：粒子/互动提示/分享深链）。 */
  function mountV05(
    photoId: string,
    options: V05Options = {},
  ): { wrapper: VueWrapper; bubbles: Ref<LikeBubble[]>; current: Ref<string> } {
    let bubbles!: Ref<LikeBubble[]>;
    let current!: Ref<string>;
    const Host = defineComponent({
      components: { PhotoLightbox },
      setup() {
        const sequence = usePhotoSequence({
          token: ref('tok-lb'),
          locale: ref('zh-CN'),
          category: ref(null),
        });
        const likes = useLikes({ token: ref('tok-lb'), photos: () => sequence.photos });
        bubbles = ref(options.bubbles ?? []);
        current = ref(photoId);
        return {
          sequence,
          likes,
          bubbles,
          current,
          albumTitle: options.albumTitle,
          shareUrl: options.shareUrl,
          download: options.download,
        };
      },
      template: `<PhotoLightbox
        v-model:photo-id="current"
        :sequence="sequence"
        :likes="likes"
        :like-bubbles="bubbles"
        :album-title="albumTitle"
        :share-url="shareUrl"
        :download="download"
      />`,
    });
    const wrapper = mount(Host, { global: { plugins: [i18n] } });
    mounted.push(wrapper);
    return { wrapper, bubbles, current };
  }

  beforeEach(() => {
    localStorage.clear();
    i18n = createViewerI18n('zh-CN');
    mockedGetPublicPhotos.mockReset().mockResolvedValue(makeList([makePhoto('p1'), makePhoto('p2'), makePhoto('p3')]));
    mockedGetPublicPhoto.mockReset();
    mockedPostLikeBatch.mockReset().mockResolvedValue({ total: 0, countVersion: 1, batchAccepted: true });
    document.body.style.overflow = '';
  });

  afterEach(() => {
    while (mounted.length > 0) {
      mounted.pop()?.unmount();
    }
    Reflect.deleteProperty(navigator, 'share');
    Reflect.deleteProperty(navigator, 'clipboard');
    vi.restoreAllMocks();
    document.body.style.overflow = '';
    document.documentElement.className = '';
  });

  it('bursts heart particles for a local like click on the current photo', async () => {
    const { wrapper } = mountV05('p1');
    await flushPromises();

    expect(wrapper.findAll('.heart-particles-zone .particle')).toHaveLength(0);
    await wrapper.find('.like-slot .action-btn').trigger('click');
    await nextTick();
    expect(wrapper.findAll('.heart-particles-zone .particle')).toHaveLength(2);
  });

  it('routes realtime bursts: particles for the current photo, a notice for others; notice click navigates', async () => {
    const { wrapper, bubbles, current } = mountV05('p1');
    await flushPromises();

    // 当前照片的他人点赞（router 已滤自身回声）→ 舞台右区粒子。
    bubbles.value = [...bubbles.value, { key: 1, photoId: 'p1', delta: 5, thumbUrl: null }];
    await nextTick();
    expect(wrapper.findAll('.heart-particles-zone .particle')).toHaveLength(2);

    // 其他照片 → 互动提示（缩略图 + ♥ + delta），不新增当前照片粒子。
    bubbles.value = [...bubbles.value, { key: 2, photoId: 'p2', delta: 3, thumbUrl: 'http://img.test/p2-thumb.jpg' }];
    await nextTick();
    const notice = wrapper.find('.interaction-notice-zone .notice');
    expect(notice.exists()).toBe(true);
    expect(notice.find('.notice-thumb').attributes('src')).toBe('http://img.test/p2-thumb.jpg');
    expect(notice.find('.notice-delta').text()).toBe('+3');
    expect(wrapper.findAll('.heart-particles-zone .particle')).toHaveLength(2);

    // 点击定位：与缩略图条共用入口（update:photoId，序列内导航）。
    await notice.trigger('click');
    expect(current.value).toBe('p2');
  });

  /** 分享弹层（Teleport 到 body）：从 document 定位。 */
  function lbSheet(): HTMLElement | null {
    return document.querySelector('.share-sheet');
  }

  it('share opens the sheet with the photo deep link; native share via sheet button', async () => {
    const share = vi.fn(() => Promise.resolve());
    Object.defineProperty(navigator, 'share', { value: share, configurable: true });
    const { wrapper } = mountV05('p1', {
      albumTitle: '2026 公司年会',
      shareUrl: '/a/tok-lb/p/p1?lang=zh-CN',
    });
    await flushPromises();

    await wrapper.find('button[aria-label="分享照片"]').trigger('click');
    await flushPromises();
    // 弹层出现并携带照片深链（页面级提示已退役）。
    expect(lbSheet()).not.toBeNull();
    expect(
      lbSheet()!.querySelector('[data-test="share-sheet-url"]')!.textContent,
    ).toBe('/a/tok-lb/p/p1?lang=zh-CN');
    expect(wrapper.find('.share-status').exists()).toBe(false);

    const nativeBtn = lbSheet()!.querySelector<HTMLButtonElement>('[data-test="share-sheet-native"]')!;
    nativeBtn.click();
    await flushPromises();
    expect(share).toHaveBeenCalledWith({ title: '2026 公司年会', url: '/a/tok-lb/p/p1?lang=zh-CN' });
  });

  it('sheet copy button writes the deep link with on-button feedback', async () => {
    const writeText = vi.fn(() => Promise.resolve());
    Object.defineProperty(navigator, 'clipboard', { value: { writeText }, configurable: true });
    const { wrapper } = mountV05('p1', { shareUrl: '/a/tok-lb/p/p1?lang=zh-CN' });
    await flushPromises();

    await wrapper.find('button[aria-label="分享照片"]').trigger('click');
    await flushPromises();
    const copyBtn = lbSheet()!.querySelector<HTMLButtonElement>('[data-test="share-sheet-copy"]')!;
    copyBtn.click();
    await flushPromises();
    expect(writeText).toHaveBeenCalledWith('/a/tok-lb/p/p1?lang=zh-CN');
    expect(copyBtn.textContent).toContain('已复制');
  });

  it('shows the download failure only on the photo that triggered it', async () => {
    // 控制器桩：失败已归属 p1（useDownload.failedFor，§5.4 异步错误归属）。
    const download = reactive({
      busy: false,
      failed: 'download.failed',
      failedFor: 'p1',
      wechatGuide: false,
      copyNotice: '',
      canDownload: true,
      canDownloadOriginal: false,
    }) as unknown as DownloadController;
    const { wrapper, current } = mountV05('p1', { download });
    await flushPromises();

    expect(wrapper.find('.download-failed').text()).toContain('下载失败');

    // 切到 p2：p1 的下载错误不张冠李戴到当前照片。
    current.value = 'p2';
    await nextTick();
    expect(wrapper.find('.download-failed').exists()).toBe(false);

    // 切回 p1：错误提示仍归属原照片（可再见）。
    current.value = 'p1';
    await nextTick();
    expect(wrapper.find('.download-failed').exists()).toBe(true);
  });
});