import lighthouse from 'lighthouse';
import desktopConfig from 'lighthouse/core/config/desktop-config.js';
import { chromium } from 'playwright';
import { mkdir, writeFile } from 'node:fs/promises';
import net from 'node:net';

const origin = process.env.CMS_URL || 'http://127.0.0.1:8080';
// Eine Startseite ist nicht die Website. Geprüft wird, was CMS_PATHS nennt - mehrere Adressen mit
// Komma getrennt; ohne Angabe die Startseite.
const paths = (process.env.CMS_PATHS || '/').split(',').map(p => p.trim()).filter(Boolean);
const output = process.env.CMS_AUDIT_DIR || 'reports/lighthouse';
const preflight = await fetch(origin);
if (!preflight.ok || /noindex/i.test(preflight.headers.get('x-robots-tag') || '')) {
  throw new Error('Audit requires an indexable HTTP 200 page in production mode. Check APP_ENV and APP_DEBUG.');
}
await mkdir(output, { recursive: true });
const portProbe = net.createServer();
await new Promise(resolve => portProbe.listen(0, '127.0.0.1', resolve));
const port = portProbe.address().port;
await new Promise(resolve => portProbe.close(resolve));
// CMS_HOST_RULES, etwa "MAP localhost 127.0.0.1": für eingebettete Seiten, die das Einbetten nur
// von localhost erlauben, während der Server auf 127.0.0.1 lauscht (Kantarci-Markt-App).
const chrome = await chromium.launch({ args: [`--remote-debugging-port=${port}`, ...(process.env.CMS_HOST_RULES ? [`--host-resolver-rules=${process.env.CMS_HOST_RULES}`] : [])] });
const summary = [];
try {
  for (const path of paths) {
  const label = '/' === path ? 'home' : path.replace(/^\//, '').replace(/\//g, '-');
  for (const profile of ['mobile', 'desktop']) {
    const runs = [];
    for (let run = 1; run <= 3; run++) {
      const result = await lighthouse(origin + ('/' === path ? '' : path), {
        port,
        output: 'json',
        logLevel: 'error',
      }, profile === 'desktop' ? desktopConfig : undefined);
      const lhr = result.lhr;
      if (lhr.configSettings.formFactor !== profile) {
        throw new Error(`Requested ${profile}, measured ${lhr.configSettings.formFactor}`);
      }
      await writeFile(`${output}/${label}-${profile}-${run}.json`, result.report);
      runs.push(lhr);
      console.log(label, profile, run, Object.fromEntries(Object.entries(lhr.categories).map(([key, value]) => [key, value.score])));
    }
    const scores = {};
    for (const category of Object.keys(runs[0].categories)) {
      const values = runs.map(r => r.categories[category].score).filter(v => v !== null).sort((a, b) => a - b);
      scores[category] = values.length ? values[Math.floor(values.length / 2)] : null;
    }
    summary.push({ path, profile, scores, lighthouseVersion: runs[0].lighthouseVersion, settings: runs[0].configSettings, environment: runs[0].environment, note: 'Local prototype only. No customer-site acceptance or field-data claim.' });
  }
  }
  await writeFile(`${output}/summary.json`, JSON.stringify(summary, null, 2));
  for (const row of summary) {
    console.log(`${row.path} ${row.profile}: ${Object.entries(row.scores).map(([k, v]) => k + ' ' + Math.round(v * 100)).join(', ')}`);
  }
  const passed = summary.every(r => r.scores.performance >= .95 && ['accessibility', 'best-practices', 'seo'].every(c => r.scores[c] === 1) && (r.scores['agentic-browsing'] === undefined || r.scores['agentic-browsing'] === 1));
  if (!passed) process.exitCode = 1;
} finally {
  await chrome.close();
}