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

// P4a Task 4 下载 Playwright（真实后端 + 真实签名管线）：
//   · 入口可见性随相册两级开关（off/off 无按钮 / on/off 单按钮 / on/on 分体
//     菜单两选项）；
//   · 微信内置浏览器 UA mock（addInitScript 覆写 navigator.userAgent）→ 点击
//     下载出引导浮层（不触端点、不 window.open），「知道了」收起；
//   · 真实下载点击：download 端点 200 + window.open 收到签名 URL（对象键模式
//     断言；实际文件保存不在浏览器 e2e 域——由 api e2e 字节级覆盖）。

/** 种「下载相册」：1 张已发布照片，开关组合由参数给定。 */
async function seedDownloadAlbum(
  alias: string,
  switches: { downloadEnabled?: boolean; originalDownloadEnabled?: boolean },
): Promise<string> {
  const album = await seedAlbum({
    alias,
    translations: [{ locale: 'zh-CN', title: `下载测试相册 ${alias}` }],
    ...switches,
  });
  await seedPhoto(album.id, `${alias}-p0`, {
    width: 480,
    height: 300,
    publishedAt: new Date(Date.now() - 60_000),
  });
  await flushSync(album.id);
  return album.publicToken;
}

async function openLightbox(page: Page, token: string, init?: () => void): Promise<void> {
  await page.addInitScript(() => localStorage.setItem('viewer.locale', 'zh-CN'));
  if (init) await page.addInitScript(init);
  await page.goto(`/a/${token}`);
  await expect(page.locator('.cell').first()).toBeVisible();
  await page.locator('.cell').first().click();
  await expect(page.locator('.photo-viewer')).toBeVisible();
}

test.afterAll(async () => {
  await cleanupSeededAlbums();
});

test('download entry visibility follows album two-tier switches', async ({ page }) => {
  test.setTimeout(120_000);
  // off/off：无下载入口。
  const offOff = await seedDownloadAlbum('dl-offoff', {
    downloadEnabled: false,
    originalDownloadEnabled: false,
  });
  await openLightbox(page, offOff);
  await expect(page.locator('.download-group')).toHaveCount(0);

  // on/off：单按钮（无 caret/菜单）。UI-02 V05：下载位在底部操作栏（.download-main）。
  const onOff = await seedDownloadAlbum('dl-onoff', {});
  await openLightbox(page, onOff);
  await expect(page.locator('.download-main')).toBeVisible();
  await expect(page.locator('.download-caret')).toHaveCount(0);

  // on/on：分体按钮，菜单两选项（浏览图 / 原图）。
  const onOn = await seedDownloadAlbum('dl-onon', { originalDownloadEnabled: true });
  await openLightbox(page, onOn);
  await expect(page.locator('.download-caret')).toBeVisible();
  await page.locator('.download-caret').click();
  await expect(page.locator('.download-menu button')).toHaveText(['浏览图', '原图']);
});

test('WeChat webview UA shows guidance overlay instead of downloading', async ({ page }) => {
  test.setTimeout(120_000);
  const token = await seedDownloadAlbum('dl-wechat', {});
  // UA 覆写先于应用代码（addInitScript）；MicroMessenger 触发引导浮层面。
  await openLightbox(page, token, () => {
    const ua =
      'Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 MicroMessenger/8.0.49(0x18003133) NetType/WIFI Language/zh_CN';
    Object.defineProperty(window.navigator, 'userAgent', { get: () => ua, configurable: true });
  });

  let endpointHit = false;
  page.on('request', (request) => {
    if (request.url().includes('/download?')) endpointHit = true;
  });

  await page.locator('.download-main').click();
  await expect(page.locator('.wechat-guide[role="dialog"]')).toBeVisible();
  await expect(page.locator('.wechat-guide h2')).toHaveText('保存图片指引');
  await expect(page.locator('.guide-copy')).toBeVisible();

  // 「知道了」收起浮层；期间 download 端点零命中（引导替代直接下载）。
  await page.locator('.guide-dismiss').click();
  await expect(page.locator('.wechat-guide')).toHaveCount(0);
  expect(endpointHit).toBe(false);
});

test('real click downloads browse via signed url from the endpoint', async ({ page }) => {
  test.setTimeout(120_000);
  const token = await seedDownloadAlbum('dl-real', {});
  // 捕获 window.open（避免真实弹出标签页）：记录 URL 供对象键断言。
  await openLightbox(page, token, () => {
    (window as unknown as { __openedUrls: string[] }).__openedUrls = [];
    window.open = ((url: string | URL) => {
      (window as unknown as { __openedUrls: string[] }).__openedUrls.push(String(url));
      return {} as Window;
    }) as typeof window.open;
  });

  const endpoint = page.waitForResponse(
    (response) =>
      response.url().includes('/download?variant=browse') && response.status() === 200,
  );
  await page.locator('.download-main').click();
  const response = await endpoint;
  expect((await response.json()).variant).toBe('browse');

  await expect
    .poll(async () =>
      page.evaluate(() => (window as unknown as { __openedUrls: string[] }).__openedUrls[0] ?? ''),
    )
    .toContain('/variants/');
  const opened = await page.evaluate(
    () => (window as unknown as { __openedUrls: string[] }).__openedUrls[0] ?? '',
  );
  // 短期签名凭证（SigV4 查询参数面）+ browse 对象键（无水印相册）。
  expect(opened).toContain('X-Amz-Signature');
  expect(opened).toContain('/browse.jpg');
});