/**
 * Email capture — the customer "Mail Client Setup" section on the Email page.
 *
 * Captures, as the demo customer:
 *   - whp-email-autodiscovery.png   the Mail Client Setup accordion section,
 *                                   expanded, with the per-domain autodiscovery
 *                                   DNS records table + copyable zone block.
 *
 * Viewport-only (1440x900), redacted for our multi-server fleet: the mail-server
 * hostname becomes a neutral placeholder, while the brand demo domain
 * (whp-demo.anhh.co) is kept visible on purpose.
 *
 * Read-only: expands an accordion section for the screenshot, never saves.
 */
import { chromium, type Page } from 'playwright';
import { mkdir } from 'node:fs/promises';
import { resolve, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';

const __dirname = dirname(fileURLToPath(import.meta.url));
const OUT_DIR = resolve(__dirname, '../../src/assets/screenshots/whp');

function need(name: string): string {
  const v = process.env[name];
  if (!v) throw new Error(`missing env: ${name}`);
  return v;
}

const BASE = need('WHP_BASE');
const USER = need('WHP_USER');
const PASS = need('WHP_PASS');

const HIDE_CSS = `.navbar-text, .brand-full { visibility: hidden !important; }`;

async function login(page: Page) {
  await page.goto(`${BASE}/login.php`, { waitUntil: 'domcontentloaded' });
  await page.fill('input[name="user"]', USER);
  await page.fill('input[name="password"]', PASS);
  await page.click('button[type="submit"]');
  await page.waitForLoadState('networkidle');
}

/**
 * Neutralise fleet-identifying text before the screenshot. The brand demo
 * domain (anhh.co) is intentionally preserved; the mail-server host and any
 * server hostnames/IPs are swapped for placeholders.
 */
async function redact(page: Page) {
  await page.addStyleTag({ content: HIDE_CSS });
  await page.evaluate(() => {
    const swaps: [RegExp, string][] = [
      [/mail\d+\.cloud-hosting\.io/gi, '<mail-server>.cloud-hosting.io'],
      [/whp\d+(-[a-z0-9]+)?\.cloud-hosting\.io/gi, '<your-server>.cloud-hosting.io'],
      [/WHP\d+(-[A-Z0-9]+)?\b/g, '<YOUR-SERVER>'],
      [/whp\d+(-[a-z0-9]+)?\b/gi, '<your-server>'],
      [/\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b/g, '<server-IP>'],
    ];
    const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT);
    const nodes: Text[] = [];
    let n: Node | null = walker.nextNode();
    while (n) { nodes.push(n as Text); n = walker.nextNode(); }
    for (const node of nodes) {
      let v = node.nodeValue ?? '';
      for (const [re, rep] of swaps) v = v.replace(re, rep);
      if (v !== node.nodeValue) node.nodeValue = v;
    }
  });
}

async function main() {
  await mkdir(OUT_DIR, { recursive: true });
  const browser = await chromium.launch({ headless: true });
  const ctx = await browser.newContext({
    ignoreHTTPSErrors: true,
    viewport: { width: 1440, height: 900 },
    deviceScaleFactor: 2,
  });
  const page = await ctx.newPage();
  try {
    await login(page);
    await page.goto(`${BASE}/index.php?page=email-management`, { waitUntil: 'networkidle' });

    // Expand the (collapsed-by-default) "Mail Client Setup" accordion section.
    await page.locator('button[data-bs-target="#mail-client-setup"]').click();
    await page.waitForSelector('#custMailDnsDomain', { state: 'visible' });
    // The zone <pre> is populated on DOMContentLoaded; re-run to be safe.
    await page.evaluate(() => {
      const fn = (window as unknown as { renderCustMailDns?: () => void }).renderCustMailDns;
      if (typeof fn === 'function') fn();
    });
    await page.waitForTimeout(500);

    await redact(page);
    const item = page.locator('#mail-client-setup').locator('xpath=ancestor::div[contains(@class,"accordion-item")]');
    await item.scrollIntoViewIfNeeded();
    await page.waitForTimeout(300);
    const path = resolve(OUT_DIR, 'whp-email-autodiscovery.png');
    await item.screenshot({ path });
    console.log(`captured whp-email-autodiscovery -> ${path}`);
  } finally {
    await browser.close();
  }
}

main().catch((err) => { console.error(err); process.exit(1); });