import { expect, test, type Page } from '@playwright/test';
import {
  cleanupSeededAlbums,
  createEmbedSlot,
  flushOutbox,
  flushSync,
  makePublicToken,
  seedAlbum,
  seedPhoto,
  updateEmbedSlot,
} from './helpers';

// P4b Task 4 嵌入轮播组件 Playwright（真实后端：cn 8080 + ov 8081 + viewer dev
// 5175 由 playwright.config webServer 拉起或复用）。宿主夹具页
// /__test__/embed-host.html（viewer publicDir 静态资产，仅测试用）引入真实
// loader.js（/embed/v1/loader.js）→ iframe 载 /embed/{slot} → 走 ov 公开端点。
// 展示位种子经 cn admin API 真实路径（seedAdmin + POST/PATCH），slot.updated
// 事件以 flushOutbox 排空（不随相册 bootstrap 走，见 helpers 注）。
// 断言锚点：loader 侧 wrapper（iframe 父 div，inline style）/ 把手（div[role=button]）；
// iframe 内 viewer 侧 CSS 类名。CSP：夹具页不设（宿主真实 CSP 要求见
// packages/embed-loader/README-embed.md，此仅文档化）。

const MINUTE = 60_000;

interface SeededFeed {
  slotToken: string;
  slotId: string;
  albumToken: string;
  photoIds: string[];
}

/** 相册（zh 默认 + en 双语）+ 3 张错峰发布照片 + 展示位绑定 + ov 投影。 */
async function seedFeed(alias: string): Promise<SeededFeed> {
  const album = await seedAlbum({
    alias,
    defaultLocale: 'zh-CN',
    translations: [
      { locale: 'zh-CN', title: `${alias} 中文相册`, description: '嵌入轮播' },
      { locale: 'en', title: `${alias} EN Album`, description: 'embed feed' },
    ],
  });
  const base = Date.now() - 10 * MINUTE;
  const photoIds = [
    await seedPhoto(album.id, `${alias}-p1`, { publishedAt: new Date(base - 2 * MINUTE) }),
    await seedPhoto(album.id, `${alias}-p2`, { publishedAt: new Date(base - MINUTE) }),
    await seedPhoto(album.id, `${alias}-p3`, { publishedAt: new Date(base) }),
  ];
  await flushSync(album.id);
  const slot = await createEmbedSlot(`viewer-e2e-${alias}`);
  await updateEmbedSlot(slot.id, { albumId: album.id });
  await flushOutbox();
  return { slotToken: slot.token, slotId: slot.id, albumToken: album.publicToken, photoIds };
}

/** loader wrapper（iframe 父 div）inline height（px 字串；''=未置）。 */
function wrapperHeight(page: Page): Promise<string> {
  return page.locator('iframe').evaluate((frame) => (frame.parentElement as HTMLElement).style.height);
}

test.describe.serial('embed carousel widget (P4b Task 4)', () => {
  test.afterAll(async () => {
    await cleanupSeededAlbums();
  });

  test('host page shows carousel, rotates photos and opens the viewer photo in a new tab', async ({ page }) => {
    const feed = await seedFeed('main');

    await page.goto(`/__test__/embed-host.html?slot=${feed.slotToken}&interval=3000`);
    const frame = page.frameLocator('iframe');

    // lang=auto → 相册 defaultLocale（zh-CN）标题。
    await expect(frame.locator('.embed-title')).toHaveText('main 中文相册');
    // 轮播照片就位（3 张，thumb 为真实签名 URL）。
    await expect(frame.locator('.embed-photo img').first()).toBeVisible();
    await expect(frame.locator('.embed-photo')).toHaveCount(3);
    await expect(frame.locator('.embed-dot')).toHaveCount(3);

    // intervalMs 切换：当前展示照片变化（首个为 publishedAt 最新 p3）。
    const firstSrc = await frame.locator('.embed-photo.active img').getAttribute('src');
    await expect
      .poll(async () => frame.locator('.embed-photo.active img').getAttribute('src'), { timeout: 10_000 })
      .not.toBe(firstSrc);

    // 点击照片 → 新标签打开 viewer 单图深链（noopener；lang 跟随 resolvedLocale）。
    const popupPromise = page.context().waitForEvent('page');
    await frame.locator('.embed-photo.active').click();
    const popup = await popupPromise;
    await expect(popup).toHaveURL(new RegExp(`/a/${feed.albumToken}/p/`));
    await expect(popup).toHaveURL(/lang=zh-CN/);
    await popup.close();
  });

  // T15（A12）embed lang 参数两语言渲染断言之 en 侧（zh 侧由 lang=auto →
  // defaultLocale 各用例覆盖）：loader data-lang=en → iframe 内英文标题，
  // 深链 lang=en 跟随。
  test('lang=en renders English copy in the iframe and passes en to the photo deep link', async ({ page }) => {
    const feed = await seedFeed('langen');

    await page.goto(`/__test__/embed-host.html?slot=${feed.slotToken}&lang=en`);
    const frame = page.frameLocator('iframe');
    await expect(frame.locator('.embed-title')).toHaveText('langen EN Album');
    await expect(frame.locator('.embed-photo').first()).toBeVisible();

    // 点击 → 新标签深链携带 lang=en（resolvedLocale）。
    const popupPromise = page.context().waitForEvent('page');
    await frame.locator('.embed-photo.active').click();
    const popup = await popupPromise;
    await expect(popup).toHaveURL(new RegExp(`/a/${feed.albumToken}/p/`));
    await expect(popup).toHaveURL(/lang=en/);
    await popup.close();
  });

  test('collapse button hides the widget, persists after reload, and the handle expands it', async ({ page }) => {
    const feed = await seedFeed('collapse');

    await page.goto(`/__test__/embed-host.html?slot=${feed.slotToken}&interval=3000`);
    const frame = page.frameLocator('iframe');
    await expect(frame.locator('.embed-title')).toHaveText('collapse 中文相册');

    // iframe 内 × → postMessage collapse → loader wrapper 高度 0 + 把手出现 + 会话记忆。
    await frame.locator('.embed-close').click();
    await expect.poll(() => wrapperHeight(page)).toBe('0px');
    await expect(page.locator('div[role="button"]')).toBeVisible();
    await expect
      .poll(() => page.evaluate((slot) => sessionStorage.getItem(`pl-embed-collapsed:${slot}`), feed.slotToken))
      .toBe('1');

    // 刷新仍收起（会话内不反复弹出，需求 9）。
    await page.reload();
    await expect.poll(() => wrapperHeight(page)).toBe('0px');
    await expect(page.locator('div[role="button"]')).toBeVisible();

    // 把手点击 → loader 展开回记忆高度，并向 iframe 发 expand（恢复轮询）。
    await page.locator('div[role="button"]').click();
    await expect
      .poll(async () => (await wrapperHeight(page)) !== '0px')
      .toBe(true);
    await expect(frame.locator('.embed-title')).toHaveText('collapse 中文相册');
  });

  test('narrow viewport starts collapsed and downgrades to sm size', async ({ page }) => {
    const feed = await seedFeed('narrow');

    await page.setViewportSize({ width: 375, height: 667 });
    await page.goto(`/__test__/embed-host.html?slot=${feed.slotToken}`);

    // <480px：强制 collapsedDefault + sm（280px 宽，计划评审缺口：移动端可用）。
    await expect(page.locator('div[role="button"]')).toBeVisible();
    await expect.poll(() => wrapperHeight(page)).toBe('0px');
    const width = await page
      .locator('iframe')
      .evaluate((frame) => (frame.parentElement as HTMLElement).style.width);
    expect(width).toBe('280px');

    // 把手展开可用（移动端不因默认收起而不可达）。
    await page.locator('div[role="button"]').click();
    await expect
      .poll(async () => (await wrapperHeight(page)) !== '0px')
      .toBe(true);
  });

  test('newly published photo appears within the poll window', async ({ page }) => {
    const album = await seedAlbum({
      alias: 'poll',
      translations: [{ locale: 'zh-CN', title: '轮询增量相册' }],
    });
    await seedPhoto(album.id, 'poll-p1', { publishedAt: new Date(Date.now() - MINUTE) });
    await flushSync(album.id);
    const slot = await createEmbedSlot('viewer-e2e-poll');
    await updateEmbedSlot(slot.id, { albumId: album.id });
    await flushOutbox();

    // ?poll=2000 → 夹具页向 iframe 注入 __embedPollMs（同源；轮询 2s）。
    await page.goto(`/__test__/embed-host.html?slot=${slot.token}&poll=2000`);
    const frame = page.frameLocator('iframe');
    await expect(frame.locator('.embed-photo')).toHaveCount(1);

    // 新照片发布（真实管线同步 ov，ETag 必变 → 200 增量）→ 追加队尾（A11 数据路径）。
    await seedPhoto(album.id, 'poll-p2', { publishedAt: new Date() });
    await flushSync(album.id);
    await expect
      .poll(() => frame.locator('.embed-photo').count(), { timeout: 20_000 })
      .toBe(2);
  });

  test('rebinding to another album resets the feed (configVersion bump, A22)', async ({ page }) => {
    const albumA = await seedAlbum({
      alias: 'rebind-a',
      translations: [{ locale: 'zh-CN', title: '换绑前相册' }],
    });
    await seedPhoto(albumA.id, 'rebind-a-p1', { publishedAt: new Date(Date.now() - 2 * MINUTE) });
    await seedPhoto(albumA.id, 'rebind-a-p2', { publishedAt: new Date(Date.now() - MINUTE) });
    const albumB = await seedAlbum({
      alias: 'rebind-b',
      translations: [{ locale: 'zh-CN', title: '换绑后相册' }],
    });
    await seedPhoto(albumB.id, 'rebind-b-p1', { publishedAt: new Date(Date.now()) });
    await flushSync(albumA.id);
    await flushSync(albumB.id);
    const slot = await createEmbedSlot('viewer-e2e-rebind');
    await updateEmbedSlot(slot.id, { albumId: albumA.id });
    await flushOutbox();

    await page.goto(`/__test__/embed-host.html?slot=${slot.token}&poll=2000`);
    const frame = page.frameLocator('iframe');
    await expect(frame.locator('.embed-title')).toHaveText('换绑前相册');
    await expect(frame.locator('.embed-photo')).toHaveCount(2);

    // 换绑：configVersion+1 → 轮询发现版本升 → 全量重置（新相册标题 + 新照片集，
    // 旧相册照片不残留——A22「旧响应不串图」）。
    await updateEmbedSlot(slot.id, { albumId: albumB.id });
    await flushOutbox();
    await expect
      .poll(async () => frame.locator('.embed-title').textContent(), { timeout: 20_000 })
      .toBe('换绑后相册');
    await expect
      .poll(() => frame.locator('.embed-photo').count(), { timeout: 20_000 })
      .toBe(1);
  });

  test('album without photos shows the coming-soon card', async ({ page }) => {
    const album = await seedAlbum({
      alias: 'emptyslot',
      translations: [{ locale: 'zh-CN', title: '空相册展示位' }],
    });
    await flushSync(album.id);
    const slot = await createEmbedSlot('viewer-e2e-empty');
    await updateEmbedSlot(slot.id, { albumId: album.id });
    await flushOutbox();

    await page.goto(`/__test__/embed-host.html?slot=${slot.token}`);
    const frame = page.frameLocator('iframe');
    await expect(frame.locator('.embed-title')).toHaveText('空相册展示位');
    await expect(frame.locator('.embed-empty')).toHaveText('照片即将上线');
  });

  test('ghost slot collapses silently with no error UI inside the iframe', async ({ page }) => {
    await page.goto(`/__test__/embed-host.html?slot=${makePublicToken()}`);

    // 404（不存在/停用/未绑定同码防探测）→ postMessage collapse：wrapper 高度 0 +
    // 把手出现；iframe 内无错误 UI（root 隐藏，不弹错误）。
    await expect.poll(() => wrapperHeight(page), { timeout: 15_000 }).toBe('0px');
    await expect(page.locator('div[role="button"]')).toBeVisible();
    await expect(page.frameLocator('iframe').locator('.embed-root')).toHaveCount(0);
  });
});