import { chromium } from 'playwright';
import AxeBuilder from '@axe-core/playwright';
import assert from 'node:assert/strict';
import { mkdir, writeFile } from 'node:fs/promises';
import { spawn, execFileSync } from 'node:child_process';
import { randomBytes } from 'node:crypto';
import net from 'node:net';

const php = process.env.PHP_BINARY || 'php';
execFileSync(php, ['bin/console', 'cache:clear', '--env=prod', '--no-debug'], { stdio: 'ignore' });
const fixture = JSON.parse(execFileSync(php, ['tests/browser-fixture.php'], { encoding: 'utf8' }));
const probe = net.createServer();
await new Promise(resolve => probe.listen(0, '127.0.0.1', resolve));
const port = probe.address().port;
await new Promise(resolve => probe.close(resolve));
const origin = `http://127.0.0.1:${port}`;
const server = spawn(php, ['-d', 'upload_max_filesize=8M', '-d', 'post_max_size=10M', '-d', 'memory_limit=256M', '-S', `127.0.0.1:${port}`, '-t', 'public'], {
  windowsHide: true,
  env: { ...process.env, APP_ENV: 'prod', APP_DEBUG: '0', APP_SECRET: randomBytes(32).toString('hex'), DATABASE_URL: fixture.databaseUrl, MEDIA_DIRECTORY: fixture.mediaDirectory, SITE_ORIGIN: origin },
  stdio: 'ignore',
});
server.on('error', error => { throw error; });
let browser;
let activePage;
await mkdir('reports/editor', { recursive: true });
const checks = [];
try {
  for (let i = 0; i < 60; i++) {
    try { if ((await fetch(origin)).ok) break; } catch {}
    if (i === 59) throw new Error('Isolated PHP server did not start.');
    await new Promise(resolve => setTimeout(resolve, 200));
  }
  browser = await chromium.launch();
  const context = await browser.newContext({ viewport: { width: 1600, height: 1100 }, acceptDownloads: true });
  context.setDefaultTimeout(15000);
  const page = await context.newPage();
  activePage = page;
  const errors = [];
  page.on('pageerror', error => { errors.push(error.message); console.error('Editor script error:', error.message); });
  page.on('console', message => { if (message.type() === 'error' && /Content Security Policy/.test(message.text())) errors.push(message.text()); });
  page.on('dialog', dialog => dialog.accept());
  const axe = async name => {
    console.log('Accessibility check:', name);
    // The no-script preview sandbox cannot host axe's frame worker. Audit the identical
    // published renderer separately; retain the sandbox in the real editor.
    const result = await new AxeBuilder({ page }).exclude('#preview').withTags(['wcag2a', 'wcag2aa', 'wcag21aa', 'best-practice']).analyze();
    assert.deepEqual(result.violations.map(v => ({ id: v.id, nodes: v.nodes.map(n => n.target) })), [], name);
    checks.push({ name, violations: 0 });
  };
  await page.goto(origin + '/admin');
  assert.equal(new URL(page.url()).pathname, '/admin/login');
  await axe('login');
  await page.screenshot({ path: 'reports/editor/login.png', fullPage: true });
  await page.getByLabel('Benutzername').fill(fixture.username);
  await page.getByLabel('Passwort', { exact: true }).fill(fixture.password);
  await page.getByRole('button', { name: 'Anmelden', exact: true }).click();
  await page.waitForURL(origin + '/admin');
  console.log('Authenticated in isolated test installation.');
  await axe('page list');
  await page.screenshot({ path: 'reports/editor/pages.png', fullPage: true });
  await page.locator('a[href="/admin/pages/test-home"]').first().click();
  await page.locator('#save-status').filter({ hasText: 'Veröffentlicht' }).waitFor();
  console.log('Editor data loaded.');
  console.log('Preview status:', await page.locator('#preview-status').innerText());
  const frame = page.frameLocator('#preview');
  await frame.locator('h1').waitFor();
  await page.locator('#preview-status').filter({ hasText: 'Zum Auswählen' }).waitFor();
  await frame.locator('h1').click();
  assert.equal(await page.locator('#properties-title').innerText(), 'Überschrift');
  await page.getByLabel('Text', { exact: true }).fill('Meine bearbeitete Website');
  await frame.getByRole('heading', { name: 'Meine bearbeitete Website', exact: true }).waitFor();
  assert.equal(await page.locator('#publish').isDisabled(), true);
  await page.getByRole('button', { name: 'Rückgängig', exact: true }).click();
  await frame.getByRole('heading', { name: /Deine Inhalte/, level: 1 }).waitFor();
  await page.getByRole('button', { name: 'Wiederholen', exact: true }).click();
  await frame.getByRole('heading', { name: 'Meine bearbeitete Website', exact: true }).waitFor();
  checks.push({ name: 'preview selection, property edit, undo and redo', passed: true });
  console.log('Preview edits and history passed.');

  await page.getByRole('button', { name: 'Einklappen', exact: true }).click();
  assert.equal(await page.locator('#structure .tree-item').count(), 3);
  await page.getByLabel('Element suchen', { exact: true }).fill('Meine bearbeitete');
  assert.equal(await page.locator('#structure .tree-item').count(), 2);
  await page.locator('#structure [data-block-id="headline"]').focus();
  await page.keyboard.press('Enter');
  await page.getByLabel('Element suchen', { exact: true }).fill('');
  assert.equal(await page.locator('#structure [data-block-id="headline"]').isVisible(), true);
  await page.getByRole('button', { name: 'Alle öffnen', exact: true }).click();
  await page.getByRole('button', { name: 'Design', exact: true }).click();
  await page.getByLabel('Schriftgröße', { exact: true }).selectOption('hero');
  const frameValue = async (selector, property, expected) => {
    await page.waitForFunction(({ selector, property, expected }) => {
      const doc = document.querySelector('#preview').contentDocument;
      const element = doc?.querySelector(selector);
      return element && doc.defaultView.getComputedStyle(element)[property] === expected;
    }, { selector, property, expected });
  };
  await frameValue('#headline', 'fontSize', '72px');
  assert.equal(await page.locator('#preview').evaluate(element => element.contentWindow.innerWidth), 1240);
  await page.getByRole('button', { name: 'Tablet', exact: true }).click();
  await frameValue('#headline', 'fontSize', '72px');
  await page.getByLabel('Schriftgröße', { exact: true }).selectOption('display');
  await frameValue('#headline', 'fontSize', '52px');
  await page.getByRole('button', { name: 'Mobil', exact: true }).click();
  await frameValue('#headline', 'fontSize', '52px');
  await page.getByLabel('Schriftgröße', { exact: true }).selectOption('title');
  await frameValue('#headline', 'fontSize', '36px');
  await page.getByRole('button', { name: 'Mobil-Werte zurücksetzen', exact: true }).click();
  await frameValue('#headline', 'fontSize', '52px');
  await page.getByRole('button', { name: 'Rückgängig', exact: true }).click();
  await frameValue('#headline', 'fontSize', '36px');
  await page.getByLabel('Ausrichtung', { exact: true }).selectOption('center');
  await frameValue('#headline', 'textAlign', 'center');
  await page.getByRole('button', { name: 'Desktop', exact: true }).click();
  await frameValue('#headline', 'fontSize', '72px');
  await frameValue('#headline', 'textAlign', 'start');
  await page.locator('#structure [data-block-id="hero"]').click();
  await page.getByLabel('Innenabstand oben / unten', { exact: true }).selectOption('huge');
  await frameValue('#hero', 'paddingTop', '96px');
  await page.getByRole('button', { name: 'Mobil', exact: true }).click();
  await page.getByLabel('Innenabstand oben / unten', { exact: true }).selectOption('medium');
  await frameValue('#hero', 'paddingTop', '32px');
  await page.locator('[data-preset="columns"]').click();
  const presetSection = await page.locator('#structure .tree-item[aria-pressed="true"]').getAttribute('data-block-id');
  const presetRow = `#${presetSection} .block-row`;
  await frame.locator(presetRow).waitFor();
  const columnCount = async expected => {
    await page.waitForFunction(({ selector, expected }) => {
      const doc = document.querySelector('#preview').contentDocument;
      const element = doc?.querySelector(selector);
      return element && doc.defaultView.getComputedStyle(element).gridTemplateColumns.split(' ').length === expected;
    }, { selector: presetRow, expected });
  };
  await columnCount(1);
  await page.getByRole('button', { name: 'Desktop', exact: true }).click();
  await columnCount(2);
  await page.getByRole('button', { name: 'Rückgängig', exact: true }).click();
  await frame.locator(presetRow).waitFor({ state: 'detached' });
  await page.getByRole('button', { name: 'Wiederholen', exact: true }).click();
  await columnCount(2);
  await page.locator('#structure [data-block-id="headline"]').click();
  await page.getByRole('button', { name: 'Inhalt', exact: true }).click();
  checks.push({ name: 'keyboard tree search and collapse, responsive inheritance/reset/undo, true viewport widths, spacing and responsive section preset', passed: true });
  console.log('Responsive design, tree tools and presets passed.');

  await page.locator('#library [data-add="gallery"]').click();
  const galleryId = await page.locator('#structure .tree-item[aria-pressed="true"]').getAttribute('data-block-id');
  await page.getByRole('button', { name: 'Galeriebilder auswählen', exact: true }).click();
  await page.locator('#media-status').filter({ hasText: '0 Bilder' }).waitFor();
  await page.locator('#media-upload').setInputFiles(fixture.images);
  await page.locator('#media-status').filter({ hasText: '2 Bilder' }).waitFor();
  const mediaItems = (await (await context.request.get(origin + '/admin/api/media')).json()).items;
  const mediaResponse = await context.request.get(origin + mediaItems[0].variants[0].src);
  assert.equal(mediaResponse.status(), 200, `Media delivery: ${(await mediaResponse.text()).slice(0, 160)}`);
  for (const [index, item] of mediaItems.entries()) {
    await page.locator(`[data-media-id="${item.id}"]`).focus();
    await page.keyboard.press('Space');
    assert.equal(await page.locator(`[data-media-id="${item.id}"]`).evaluate(button => button === document.activeElement), true);
    await page.getByLabel('Bildtitel', { exact: true }).fill(index === 0 ? 'Bergblick' : 'Küstenblick');
    await page.getByLabel('Alternativtext des Mediums', { exact: true }).fill(index === 0 ? 'Grüne Berglandschaft mit warmer Abendsonne' : 'Küstenlandschaft mit Hügeln und Abendsonne');
    await page.getByRole('button', { name: 'Bildangaben speichern', exact: true }).click();
    await page.getByRole('button', { name: 'Bildangaben speichern', exact: true }).waitFor({ state: 'visible' });
    await page.waitForFunction(() => !document.querySelector('#media-save').disabled);
  }
  await axe('media picker');
  await page.screenshot({ path: 'reports/editor/media-library.png', fullPage: true });
  await page.getByRole('button', { name: 'Auswahl übernehmen (2)', exact: true }).click();
  await frame.locator(`#${galleryId} img`).first().waitFor();
  assert.equal(await frame.locator(`#${galleryId} img`).count(), 2);
  await frame.locator(`#${galleryId} img`).first().scrollIntoViewIfNeeded();
  await page.waitForFunction(id => document.querySelector('#preview').contentDocument?.querySelector(`#${id} img`)?.naturalWidth > 0, galleryId);
  const imageId = await frame.locator(`#${galleryId} figure`).first().getAttribute('id');
  await page.locator(`#structure [data-block-id="${imageId}"]`).click();
  await page.getByLabel('Bildunterschrift', { exact: true }).fill('Ein Ausblick zum Durchatmen.');
  await frame.getByText('Ein Ausblick zum Durchatmen.', { exact: true }).waitFor();
  await page.getByRole('button', { name: 'Nach unten verschieben', exact: true }).click();
  await page.getByRole('button', { name: 'Rückgängig', exact: true }).click();
  await page.locator(`#structure [data-block-id="${galleryId}"]`).click();
  await page.getByRole('button', { name: 'Design', exact: true }).click();
  await page.getByLabel('Spaltenaufteilung', { exact: true }).selectOption('two');
  await page.getByLabel('Schatten', { exact: true }).selectOption('soft');
  await page.getByLabel('Hover-Effekt', { exact: true }).selectOption('lift');
  await page.getByLabel('Einblendung beim Laden', { exact: true }).selectOption('rise');
  await frame.locator(`#${galleryId}.fx-entrance-rise`).waitFor();
  await page.getByRole('button', { name: 'Mobil', exact: true }).click();
  await page.getByLabel('Spaltenaufteilung', { exact: true }).selectOption('one');
  await frame.locator(`#${galleryId}.d-mobile-columns-one`).waitFor();
  await page.getByRole('button', { name: 'Desktop', exact: true }).click();
  await page.emulateMedia({ reducedMotion: 'reduce' });
  await frameValue(`#${galleryId}`, 'animationName', 'none');
  await frameValue(`#${galleryId}`, 'transform', 'none');
  await page.emulateMedia({ reducedMotion: 'no-preference' });
  await page.locator('#open-media-library').click();
  await page.locator('#media-status').filter({ hasText: '2 Bilder' }).waitFor();
  await page.locator(`[data-media-id="${mediaItems[0].id}"]`).click();
  await page.getByRole('button', { name: 'Archivieren', exact: true }).click();
  await page.locator('#media-status').filter({ hasText: '1 Bilder' }).waitFor();
  assert.equal((await context.request.get(origin + mediaItems[0].variants[0].src)).status(), 200);
  await page.getByLabel('Archivierte Bilder anzeigen', { exact: true }).check();
  await page.locator(`[data-media-id="${mediaItems[0].id}"]`).click();
  await page.getByRole('button', { name: 'Wiederherstellen', exact: true }).click();
  await page.locator('#media-status').filter({ hasText: '2 Bilder' }).waitFor();
  await page.getByRole('button', { name: 'Schließen', exact: true }).click();
  await page.locator('#structure [data-block-id="headline"]').click();
  await page.getByRole('button', { name: 'Inhalt', exact: true }).click();
  checks.push({ name: 'image upload, alt metadata, multi-select gallery, caption, sorting undo, archive/restore, responsive variants and reduced-motion effects', passed: true });
  console.log('Media library, gallery and effects passed.');

  await page.locator('#library [data-add="text"]').click();
  await page.getByLabel('Text', { exact: true }).fill('Dieser Absatz wurde im Editor eingefügt.');
  await page.getByRole('button', { name: 'Duplizieren', exact: true }).click();
  await page.getByLabel('Text', { exact: true }).fill('Das ist eine unabhängige Kopie.');
  await page.getByRole('button', { name: 'Nach oben verschieben', exact: true }).click();
  await page.getByRole('button', { name: 'Löschen', exact: true }).click();
  await page.getByRole('button', { name: 'Rückgängig', exact: true }).click();
  await page.locator('#toggle-library').click();
  await page.locator(`#structure [data-toggle="${presetSection}"]`).click();
  await page.locator(`#structure [data-toggle="${galleryId}"]`).click();
  await page.getByRole('button', { name: 'Text: Dieser Absatz wurde im Editor eingefügt.', exact: true }).dragTo(page.locator('#structure [data-block-id="principles"]'));
  await page.waitForFunction(() => document.querySelector('#structure [data-block-id="principles"]')?.parentElement.textContent.includes('Dieser Absatz wurde im Editor eingefügt.'));
  await page.getByRole('button', { name: 'Rückgängig', exact: true }).click();
  await page.locator('#toggle-library').click();
  await page.route('**/admin/api/pages/test-home/draft', route => route.abort(), { times: 1 });
  await page.getByRole('button', { name: 'Entwurf speichern', exact: true }).click();
  await page.locator('#message').filter({ hasText: 'Verbindung ist unterbrochen' }).waitFor();
  assert.equal(await page.getByRole('button', { name: 'Entwurf speichern', exact: true }).isEnabled(), true);
  checks.push({ name: 'network failure retains edits and allows retry', passed: true });
  await page.getByRole('button', { name: 'Entwurf speichern', exact: true }).click();
  await page.locator('#save-status').filter({ hasText: 'Entwurf gespeichert' }).waitFor();
  const stored = await (await context.request.get(origin + '/admin/api/pages/test-home')).json();
  console.log('Draft stored.');
  assert.equal((await (await context.request.get(origin)).text()).includes('Meine bearbeitete Website'), false);
  await page.reload();
  await page.locator('#save-status').filter({ hasText: 'Entwurf gespeichert' }).waitFor();
  await frame.getByRole('heading', { name: 'Meine bearbeitete Website', exact: true }).waitFor();
  const reloaded = await (await context.request.get(origin + '/admin/api/pages/test-home')).json();
  assert.deepEqual(reloaded.document, stored.document);
  await page.getByRole('button', { name: 'Veröffentlichen', exact: true }).click();
  await page.getByRole('button', { name: 'Abbrechen', exact: true }).first().focus();
  await page.keyboard.press('Escape');
  assert.equal(await page.locator('#publish-dialog').isVisible(), false);
  assert.equal(await page.locator('#publish').evaluate(element => element === document.activeElement), true);
  await page.getByRole('button', { name: 'Veröffentlichen', exact: true }).click();
  await page.getByRole('button', { name: 'Jetzt veröffentlichen', exact: true }).click();
  await page.locator('#save-status').filter({ hasText: 'Veröffentlicht' }).waitFor();
  assert.equal((await (await context.request.get(origin)).text()).includes('Meine bearbeitete Website'), true);
  const publicPage = await context.newPage();
  await publicPage.goto(origin);
  assert.equal(await publicPage.locator(`#${galleryId} img`).count(), 2);
  await publicPage.locator(`#${galleryId} img`).first().scrollIntoViewIfNeeded();
  await publicPage.waitForFunction(id => document.querySelector(`#${id} img`)?.naturalWidth > 0, galleryId);
  assert.equal(await publicPage.locator('#headline').evaluate(element => getComputedStyle(element).fontSize), '72px');
  await publicPage.setViewportSize({ width: 768, height: 1000 });
  assert.equal(await publicPage.locator('#headline').evaluate(element => getComputedStyle(element).fontSize), '52px');
  await publicPage.setViewportSize({ width: 390, height: 844 });
  assert.equal(await publicPage.locator('#headline').evaluate(element => getComputedStyle(element).fontSize), '36px');
  assert.equal(await publicPage.locator('#hero').evaluate(element => getComputedStyle(element).paddingTop), '32px');
  assert.equal(await publicPage.evaluate(() => document.documentElement.scrollWidth <= innerWidth), true);
  await publicPage.screenshot({ path: 'reports/editor/designed-public-mobile.png', fullPage: true });
  const contentAudit = await new AxeBuilder({ page: publicPage }).withTags(['wcag2a', 'wcag2aa', 'wcag21aa', 'best-practice']).analyze();
  assert.deepEqual(contentAudit.violations.map(v => v.id), []);
  checks.push({ name: 'edited public renderer accessibility', violations: 0 });
  await publicPage.close();
  checks.push({ name: 'add, duplicate, move, delete, undo, exact reload, separate publication, dialog focus', passed: true });
  console.log('Draft reload and publication passed.');

  // A second server save must never be silently overwritten by the open editor.
  const latest = await (await context.request.get(origin + '/admin/api/pages/test-home')).json();
  const external = structuredClone(latest.document); external.title = 'Parallel gespeicherter Titel';
  const externalSave = await context.request.post(origin + '/admin/api/pages/test-home/draft', { headers: { 'X-CSRF-Token': latest.csrfToken }, data: { document: external, expectedVersion: latest.version } });
  assert.equal(externalSave.status(), 200);
  await page.locator('#select-page').click();
  await page.getByLabel('Seitentitel', { exact: true }).fill('Meine lokalen Änderungen');
  await page.getByRole('button', { name: 'Entwurf speichern', exact: true }).click();
  await page.locator('#message').filter({ hasText: 'neuerer Stand' }).waitFor();
  console.log('Conflict displayed.');
  assert.equal(await page.getByLabel('Seitentitel', { exact: true }).inputValue(), 'Meine lokalen Änderungen');
  const download = page.waitForEvent('download');
  console.log('Testing conflict export.');
  await page.getByRole('button', { name: 'Änderungen als JSON sichern' }).click();
  assert.equal((await download).suggestedFilename(), 'kant-entwurf.json');
  await page.getByRole('button', { name: 'Serverstand laden', exact: true }).click();
  await page.getByRole('button', { name: 'Serverstand übernehmen', exact: true }).click();
  await page.getByLabel('Seitentitel', { exact: true }).filter({ visible: true }).waitFor();
  await page.waitForFunction(() => document.querySelector('#property-title')?.value === 'Parallel gespeicherter Titel');
  checks.push({ name: 'conflict retains local edits, JSON export, explicit server reload', passed: true });

  await page.locator('#structure [data-block-id="headline"]').click();
  await page.getByRole('button', { name: 'Design', exact: true }).click();
  await page.locator('#preview-status').filter({ hasText: 'Zum Auswählen' }).waitFor();
  await axe('desktop editor');
  await page.screenshot({ path: 'reports/editor/editor-desktop.png', fullPage: true });
  await page.getByRole('button', { name: 'Mobil', exact: true }).click();
  assert.equal(await page.locator('#preview').evaluate(element => Math.round(element.getBoundingClientRect().width)), 390);
  await page.screenshot({ path: 'reports/editor/editor-mobile-preview.png', fullPage: true });
  await page.setViewportSize({ width: 390, height: 844 });
  assert.equal(await page.evaluate(() => document.documentElement.scrollWidth <= innerWidth), true);
  await axe('mobile editor');
  await page.screenshot({ path: 'reports/editor/editor-phone.png', fullPage: true });
  await page.locator('#open-media-library').click();
  await page.locator('#media-status').filter({ hasText: '2 Bilder' }).waitFor();
  await axe('mobile media library');
  await page.screenshot({ path: 'reports/editor/media-phone.png', fullPage: true });
  await page.getByRole('button', { name: 'Schließen', exact: true }).click();
  assert.deepEqual(errors, []);
  await writeFile('reports/editor/result.json', JSON.stringify({ checks, publicDataUntouched: true }, null, 2));
  console.log('Editor end-to-end checks passed; isolated database, production data unchanged.');
  if (process.argv.includes('--audit')) {
    console.log('Auditing the published v3 document with responsive design, gallery images and effects.');
    await browser.close(); browser = null;
    await new Promise((resolve, reject) => {
      const audit = spawn(process.execPath, ['scripts/audit.mjs'], { windowsHide: true, stdio: 'inherit', env: { ...process.env, CMS_URL: origin, CMS_AUDIT_DIR: 'reports/lighthouse-editor' } });
      audit.on('error', reject);
      audit.on('exit', code => code === 0 ? resolve() : reject(new Error(`Designed-page audit failed (${code}).`)));
    });
  }
} catch (error) {
  console.error('Check failed:', error.message);
  await activePage?.screenshot({ path: 'reports/editor/failure.png', fullPage: true, timeout: 5000 }).catch(() => {});
  throw error;
} finally {
  await browser?.close();
  server.kill();
}