#!/usr/bin/env node
import { chromium } from 'playwright';
import { readFileSync } from 'node:fs';

const BASE = process.env.REG_BASE || 'http://127.0.0.1:3311';
const failures = [];
let checks = 0;
function check(ok, message) {
  checks++;
  if (!ok) failures.push(message);
  console.log(`[component-page] ${ok ? 'OK' : 'FAIL'} ${message}`);
}
const browser = await chromium.launch();
const page = await browser.newPage({ viewport: { width: 1440, height: 900 } });
const errors = [];
page.on('pageerror', error => errors.push(error.message));
await page.addInitScript(() => {
  localStorage.setItem('kole-lang', 'zh');
  localStorage.setItem('kole-mode', 'light');
});
async function ready(slug, suffix = 'h5') {
  await page.goto(`${BASE}/site/component/${slug}/${suffix}`, { waitUntil: 'networkidle' });
  await page.waitForFunction(() => {
    const root = document.querySelector('.kole-component-page');
    return root && root.dataset.examplesReady !== 'pending' && root.dataset.detailReady !== 'pending';
  });
}
/* 宽屏（>1200px）右侧目录是唯一导航，窄屏它被隐藏、页内 sticky 导航接管。
   active 状态与可达性都要按当前生效的那套来判，不能要求两套同时可见。 */
const visibleNav = () => page.evaluate(() => {
  const toc = document.querySelector('#toc');
  const localNav = document.querySelector('.kole-component-nav');
  const tocVisible = !!toc && getComputedStyle(toc).display !== 'none' && toc.getBoundingClientRect().width > 0;
  const navVisible = !!localNav && !localNav.hidden && localNav.getBoundingClientRect().width > 0;
  return { tocVisible, navVisible };
});
try {
  const served = await (await page.request.get(`${BASE}/site/app.js`)).text();
  check(served === readFileSync(new URL('../site/app.js', import.meta.url), 'utf8'), 'preview serves the current workspace app.js');
  for (const slug of ['button', 'input', 'table', 'modal', 'dragupload', 'icon']) {
    await ready(slug);
    const structure = await page.evaluate(() => {
      const root = document.querySelector('.kole-component-page');
      const sections = [...root.querySelectorAll(':scope > section')].map(x => x.id);
      const ids = [...root.querySelectorAll('[id]')].map(x => x.id);
      const anchors = [...document.querySelectorAll('#toc [data-anchor], .kole-component-nav [data-anchor]')];
      const toc = [...document.querySelectorAll('#toc [data-anchor]')].map(x => document.getElementById(x.dataset.anchor));
      return {
        sections,
        unique: new Set(ids).size === ids.length,
        validAnchors: anchors.every(x => document.getElementById(x.dataset.anchor)),
        tocOrdered: toc.every((x, i) => !i || !!(toc[i-1].compareDocumentPosition(x) & Node.DOCUMENT_POSITION_FOLLOWING)),
        exampleCount: root.querySelectorAll('.ex-card').length,
        openCode: root.querySelectorAll('.ex-code:not([hidden])').length,
        hasApi: !!root.querySelector('#api'),
        apiLink: !!root.querySelector('.kole-component-nav [data-anchor="api"]'),
        /* #toc 在 .kole-component-page 之外（右侧栏），必须用文档级查询 ——
           用 root.querySelector('#toc …') 会恒为 null，让这条断言变成假通过。 */
        tocApiLink: !!document.querySelector('#toc [data-anchor="api"]'),
        reference: !!root.querySelector('#design #spec .kole-spec-disclosure'),
        wrappedTables: [...root.querySelectorAll('table')].every(x => x.parentElement.classList.contains('kole-doc-table')),
        pickers: root.querySelectorAll('.kole-example-picker').length,
        expandAll: root.querySelectorAll('.kole-expand-code').length
      };
    });
    check(structure.sections[0] === 'demo' && structure.sections.includes('design'), `${slug}: examples precede reference material`);
    check(structure.unique && structure.validAnchors && structure.tocOrdered, `${slug}: unique anchors and TOC match document order`);
    check(structure.exampleCount === 0 || structure.openCode === 1, `${slug}: first example code is open, remaining code is folded`);
    check(structure.hasApi === structure.tocApiLink, `${slug}: API navigation matches available data`);
    check(structure.reference && structure.wrappedTables, `${slug}: specification and tables remain accessible`);
    /* 入口减重：示例选择器已删（跳转由目录承担）；
       「全部展开代码」只在多示例时出现 —— 单示例时它没有可批量操作的对象。 */
    check(structure.pickers === 0, `${slug}: the duplicate example picker is gone`);
    check(structure.expandAll === (structure.exampleCount > 1 ? 1 : 0), `${slug}: expand-all only exists for multi-example pages (examples=${structure.exampleCount}, buttons=${structure.expandAll})`);
    const nav = await visibleNav();
    check(nav.tocVisible !== nav.navVisible, `${slug}: exactly one navigation is visible at 1440px (toc=${nav.tocVisible}, local=${nav.navVisible})`);
  }

  await ready('button');
  const payload = JSON.parse(readFileSync(new URL('../site/examples/button.json', import.meta.url), 'utf8'));
  const first = page.locator('.ex-card').first();
  const firstId = await first.getAttribute('id');
  await page.evaluate(() => document.querySelector('.ex-card').dataset.identity = 'retained');
  await first.locator('.kole-example-toggle').focus();
  await page.keyboard.press('Enter');
  check(await first.locator('.ex-code').isHidden() && await first.locator('.kole-example-toggle').getAttribute('aria-expanded') === 'false', 'keyboard folds the code with accurate aria-expanded');
  await page.locator('.kole-expand-code').click();
  check(await page.locator('.ex-code[hidden]').count() === 0, 'expand all opens every usage snippet');
  await first.locator('.ex-tabs [data-kind="jsx"]').click();
  check((await first.locator('code').textContent()) === payload.examples[0].code.jsx, 'React tab shows the exact generated usage snippet');
  check(await first.locator('.ex-tabs [aria-pressed="true"]').count() === 1, 'exactly one example stack is selected');
  await page.context().grantPermissions(['clipboard-read', 'clipboard-write']);
  await first.locator('.code-copy').click();
  await page.waitForFunction(() => document.querySelector('.ex-card .code-copy').textContent.includes('已复制'));
  const copied = await page.evaluate(() => navigator.clipboard.readText());
  // Windows clipboard normalizes LF to CRLF; only normalize line endings, not text or whitespace.
  // A missing prop, different stack or altered indentation must still fail this exact comparison.
  check(copied.replace(/\r\n/g, '\n') === payload.examples[0].code.jsx.replace(/\r\n/g, '\n'), 'copy uses the active stack snippet');
  await page.locator('.kole-expand-code').click();
  check(await page.locator('.ex-code:not([hidden])').count() === 0, 'collapse all folds every snippet');

  /* 宽屏用右侧目录做节间跳转（页内 sticky 导航此时隐藏） */
  await page.locator('#toc [data-anchor="api"]').click();
  await page.waitForFunction(() => document.querySelector('#toc [data-anchor="api"]').getAttribute('aria-current') === 'location');
  check(await page.locator('.ex-card').first().getAttribute('data-identity') === 'retained', 'section navigation does not recreate previews');
  const apiTop = await page.locator('#api').evaluate(x => x.getBoundingClientRect().top);
  check(apiTop >= 0 && apiTop < 180, `API heading lands below the top bar after anchor navigation (top=${Math.round(apiTop)})`);

  const lastId = payload.examples[payload.examples.length - 1].id;
  await page.locator(`#toc [data-anchor="${lastId}"]`).click();
  await page.waitForFunction(id => {
    const node = document.getElementById(id);
    return node && node.getBoundingClientRect().top < 260;
  }, lastId);
  check(new URL(page.url()).hash === '#' + lastId, 'example TOC link creates a shareable section anchor');
  await page.reload({ waitUntil: 'networkidle' });
  await page.waitForFunction(id => {
    const node = document.getElementById(id);
    return node && node.getBoundingClientRect().top >= 0 && node.getBoundingClientRect().top < 260;
  }, lastId);
  check(true, 'example deep link survives reload and async content');
  await page.locator('#toc [data-anchor="spec"]').click();
  check(await page.locator('.kole-spec-disclosure').getAttribute('open') !== null, 'specification TOC link opens the disclosure');

  await ready('button', 'react');
  check(await page.locator('.ex-card').first().locator('.ex-tabs [aria-pressed="true"]').getAttribute('data-kind') === 'jsx', 'framework deep link selects matching usage code');
  await page.locator('#lang-trigger').click();
  await page.locator('#lang-menu [data-lang="en"]').click();
  check((await page.locator('#toc').textContent()).includes('Design & resources'), 'English section labels are translated in the on-page TOC');
  check(await page.locator('.ex-card').first().locator('.ex-tabs [aria-pressed="true"]').getAttribute('data-kind') === 'jsx', 'language switch preserves framework');
  /* 窄屏：右侧目录隐藏，页内 sticky 导航接管 —— 它必须仍然完整可达 */
  for (const width of [320, 375, 768, 1024, 1280, 1440]) {
    await page.setViewportSize({ width, height: 900 });
    const layout = await page.evaluate(() => ({
      overflow: document.documentElement.scrollWidth - innerWidth,
      nav: [...document.querySelectorAll('.kole-component-nav a')].every(x => {
        const r = x.getBoundingClientRect();
        return r.width > 0 && r.left >= 0 && r.right <= innerWidth;
      }),
      tables: [...document.querySelectorAll('.kole-doc-table')].every(x => x.getBoundingClientRect().width <= innerWidth)
    }));
    check(layout.overflow <= 1, `English ${width}px: no page overflow (overflow=${layout.overflow})`);
    check(layout.tables, `English ${width}px: data tables stay inside the viewport`);
    const nav = await visibleNav();
    check(nav.tocVisible !== nav.navVisible, `English ${width}px: exactly one navigation is visible (toc=${nav.tocVisible}, local=${nav.navVisible})`);
    if (nav.navVisible) check(layout.nav, `English ${width}px: every local-navigation control is reachable`);
  }
  check(errors.length === 0, `no uncaught page errors${errors.length ? ': ' + errors.join('; ') : ''}`);
} finally {
  await browser.close();
}
if (failures.length) {
  console.error(`[component-page] FAIL — ${failures.length}/${checks} checks failed`);
  process.exit(1);
}
console.log(`[component-page] OK — ${checks} checks passed`);