#!/usr/bin/env node
// Vérification VISUELLE de la SPA authentifiée, sans Playwright : daemon temporaire isolé + Chromium
// headless piloté en CDP + cookie de session injecté. Produit des captures PNG (thème sombre et clair,
// largeurs desktop et mobile) et échoue si une erreur console / exception Vue survient.
//
// Usage : node packages/server/scripts/verify-ui.mjs [dossier-de-sortie]
// Prérequis : `npm run build` puis `node packages/server/scripts/copy-web.mjs` (le daemon sert la SPA
// depuis packages/server/public, que le build NE rafraîchit PAS).
import { spawn, execFileSync } from 'node:child_process';
import { mkdtempSync, mkdirSync, rmSync, writeFileSync, existsSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join, dirname, resolve as resolvePath } from 'node:path';
import { fileURLToPath } from 'node:url';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);
const WebSocket = require('ws');

const PORT = 7998;
const CDP_PORT = 9333;
const ORIGIN = `http://127.0.0.1:${PORT}`;
const serverDir = join(dirname(fileURLToPath(import.meta.url)), '..');
const outDir = resolvePath(process.argv[2] ?? join(serverDir, '..', '..', '.ui-shots'));
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
const results = [];
const check = (name, ok, detail = '') => {
  results.push({ name, ok, detail });
  console.log(`${ok ? '✅' : '❌'} ${name}${detail ? `: ${detail}` : ''}`);
};

function findChromium() {
  for (const bin of ['chromium', 'chromium-browser', 'google-chrome', 'google-chrome-stable']) {
    try {
      return execFileSync('which', [bin]).toString().trim();
    } catch {
      /* essai suivant */
    }
  }
  return null;
}

/** Client CDP minimal : un seul socket, corrélation par id, sessionId pour la cible attachée. */
function cdp(url) {
  const ws = new WebSocket(url, { perMessageDeflate: false, maxPayload: 256 * 1024 * 1024 });
  let nextId = 1;
  const pending = new Map();
  const events = [];
  ws.on('message', (raw) => {
    const msg = JSON.parse(String(raw));
    if (msg.id && pending.has(msg.id)) {
      const { resolve, reject } = pending.get(msg.id);
      pending.delete(msg.id);
      msg.error ? reject(new Error(JSON.stringify(msg.error))) : resolve(msg.result);
      return;
    }
    if (msg.method) events.push(msg);
  });
  const ready = new Promise((res, rej) => (ws.on('open', res), ws.on('error', rej)));
  const send = (method, params = {}, sessionId) =>
    new Promise((resolve, reject) => {
      const id = nextId++;
      pending.set(id, { resolve, reject });
      ws.send(JSON.stringify({ id, method, params, ...(sessionId ? { sessionId } : {}) }));
      setTimeout(() => pending.has(id) && (pending.delete(id), reject(new Error(`CDP timeout: ${method}`))), 30_000);
    });
  return { ws, ready, send, events };
}

const tmp = mkdtempSync(join(tmpdir(), 'arb-verify-ui-'));
mkdirSync(outDir, { recursive: true });
let srv = null;
let browser = null;

try {
  // La SPA servie vient de packages/server/public : garde-fou contre la vérification d'un ancien build.
  const publicIndex = join(serverDir, 'public', 'index.html');
  check('SPA copiée dans packages/server/public', existsSync(publicIndex), publicIndex);

  // --- dépôt de démonstration : un checkout principal, un worktree de feature, du travail en cours ---
  const repo = join(tmp, 'demo-repo');
  mkdirSync(repo, { recursive: true });
  const git = (...args) => execFileSync('git', args, { cwd: repo, stdio: 'pipe' });
  git('init', '-b', 'main');
  git('config', 'user.email', 'test@arboretum.dev');
  git('config', 'user.name', 'Test');
  writeFileSync(join(repo, 'README.md'), '# demo\n');
  mkdirSync(join(repo, 'src'), { recursive: true });
  writeFileSync(join(repo, 'src', 'app.ts'), 'export const version = 1\n');
  git('add', '-A');
  git('commit', '-m', 'commit initial');
  writeFileSync(join(repo, 'src', 'app.ts'), 'export const version = 2\n');

  srv = spawn(
    'node',
    [join(serverDir, 'dist', 'index.js'), '--port', String(PORT), '--db', join(tmp, 't.db'), '--claude-home', join(tmp, 'claude'), '--no-discover'],
    { env: { ...process.env, XDG_DATA_HOME: join(tmp, 'xdg'), ARBORETUM_LOG: 'warn' }, stdio: ['ignore', 'pipe', 'pipe'] },
  );
  let srvOut = '';
  srv.stdout.on('data', (d) => (srvOut += d));
  srv.stderr.on('data', (d) => (srvOut += d));

  for (let i = 0; i < 60 && !/arb_[0-9a-f]{16,}/.test(srvOut); i++) await sleep(150);
  const token = /arb_[0-9a-f]{16,}/.exec(srvOut)?.[0];
  check('daemon temporaire démarré + token', !!token);

  const login = await fetch(`${ORIGIN}/api/v1/auth/login`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json', Origin: ORIGIN },
    body: JSON.stringify({ token }),
  });
  const setCookie = login.headers.getSetCookie?.() ?? [];
  const sessionCookie = setCookie.map((c) => c.split(';')[0]).find((c) => c.startsWith('arb_session='));
  check('login → cookie de session', !!sessionCookie);
  const cookieValue = sessionCookie?.slice('arb_session='.length) ?? '';

  const j = (path, method, body) =>
    fetch(`${ORIGIN}${path}`, {
      method,
      headers: { Origin: ORIGIN, Cookie: sessionCookie ?? '', ...(body ? { 'Content-Type': 'application/json' } : {}) },
      ...(body ? { body: JSON.stringify(body) } : {}),
    });

  const repoId = (await (await j('/api/v1/repos', 'POST', { path: repo })).json()).repo?.id;
  check('dépôt de démonstration enregistré', !!repoId);
  const wtRes = await (await j(`/api/v1/repos/${repoId}/worktrees`, 'POST', { branch: 'feature/demo', runHooks: false })).json();
  check('worktree de feature créé', !!wtRes.worktree?.path);
  // du travail non commité dans le worktree de feature, pour peupler les compteurs git de l'arbre
  if (wtRes.worktree?.path) writeFileSync(join(wtRes.worktree.path, 'wip.txt'), 'travail en cours\n');
  const groupRes = await (await j('/api/v1/groups', 'POST', { label: 'Démo', color: '#34d399', repoIds: [repoId] })).json();
  check('groupe de démonstration créé', !!groupRes.group?.id);
  const sess = await (await j('/api/v1/sessions', 'POST', { cwd: repo, command: 'bash' })).json();
  check('session bash de démonstration', !!sess.session?.id);

  // --- Chromium headless en CDP ---
  const chromeBin = findChromium();
  check('Chromium disponible', !!chromeBin, chromeBin ?? 'introuvable');
  if (!chromeBin) throw new Error('Chromium introuvable : impossible de vérifier le rendu');
  browser = spawn(
    chromeBin,
    [
      '--headless=new',
      `--remote-debugging-port=${CDP_PORT}`,
      `--user-data-dir=${join(tmp, 'chrome')}`,
      '--no-first-run',
      '--no-default-browser-check',
      '--disable-gpu',
      '--hide-scrollbars',
    ],
    { stdio: ['ignore', 'pipe', 'pipe'] },
  );
  let wsUrl = null;
  for (let i = 0; i < 80 && !wsUrl; i++) {
    await sleep(200);
    try {
      wsUrl = (await (await fetch(`http://127.0.0.1:${CDP_PORT}/json/version`)).json()).webSocketDebuggerUrl;
    } catch {
      /* pas encore prêt */
    }
  }
  check('Chromium en écoute CDP', !!wsUrl);

  const client = cdp(wsUrl);
  await client.ready;

  // État de vue injecté avant le premier paint : on veut des captures qui MONTRENT le contenu
  // (arbre déplié, worktree actif), pas un IDE vide.
  const expanded = JSON.stringify(JSON.stringify([repoId]));
  const context = JSON.stringify(JSON.stringify({ repoId, wtPath: repo }));
  const seedExplorer = `localStorage.setItem('arb.ide.expandedRepos', ${expanded});localStorage.setItem('arb.ide.context', ${context});`;
  const seedGit = `${seedExplorer}localStorage.setItem('arb.ide.activity', '"git"');localStorage.setItem('arb.history.open', 'true');`;

  const shots = [
    { name: 'ide-dark-desktop', theme: 'dark', width: 1440, height: 900, seed: seedExplorer },
    { name: 'ide-light-desktop', theme: 'light', width: 1440, height: 900, seed: seedExplorer },
    { name: 'git-dark-desktop', theme: 'dark', width: 1440, height: 900, seed: seedGit },
    { name: 'git-light-desktop', theme: 'light', width: 1440, height: 900, seed: seedGit },
    { name: 'ide-dark-mobile', theme: 'dark', width: 390, height: 844, seed: seedExplorer },
    { name: 'ide-light-mobile', theme: 'light', width: 390, height: 844, seed: seedExplorer },
    { name: 'dashboard-dark-mobile', theme: 'dark', width: 390, height: 844, path: '/dashboard' },
  ];

  for (const shot of shots) {
    const { targetId } = await client.send('Target.createTarget', { url: 'about:blank' });
    const { sessionId } = await client.send('Target.attachToTarget', { targetId, flatten: true });
    await client.send('Runtime.enable', {}, sessionId);
    await client.send('Log.enable', {}, sessionId);
    await client.send('Network.enable', {}, sessionId);
    await client.send('Emulation.setDeviceMetricsOverride', { width: shot.width, height: shot.height, deviceScaleFactor: 1, mobile: shot.width < 500 }, sessionId);
    await client.send('Network.setCookie', { name: 'arb_session', value: cookieValue, domain: '127.0.0.1', path: '/', httpOnly: true }, sessionId);
    // Thème : la SPA lit `arb.theme` avant le premier paint (script anti-FOUC).
    await client.send('Page.enable', {}, sessionId);
    await client.send(
      'Page.addScriptToEvaluateOnNewDocument',
      { source: `localStorage.setItem('arb.theme', ${JSON.stringify(JSON.stringify(shot.theme))});${shot.seed ?? ''}` },
      sessionId,
    );
    const before = client.events.length;
    await client.send('Page.navigate', { url: `${ORIGIN}${shot.path ?? '/ide'}` }, sessionId);
    await sleep(3500); // laisse le temps au bootstrap REST + WS et au rendu

    const text = await client.send('Runtime.evaluate', { expression: 'document.body.innerText', returnByValue: true }, sessionId);
    const rendered = String(text.result?.value ?? '');
    check(`${shot.name} : page rendue`, rendered.length > 20, `${rendered.length} caractères`);

    const errs = client.events
      .slice(before)
      .filter((e) => e.sessionId === sessionId)
      .filter((e) => (e.method === 'Runtime.consoleAPICalled' && e.params?.type === 'error') || e.method === 'Runtime.exceptionThrown')
      .map((e) => e.params?.exceptionDetails?.text ?? (e.params?.args ?? []).map((a) => a.value ?? a.description).join(' '))
      // Les erreurs réseau des favicons/manifest en headless ne concernent pas l'app.
      .filter((m) => m && !/favicon|manifest\.webmanifest/i.test(m));
    check(`${shot.name} : aucune erreur console`, errs.length === 0, errs.slice(0, 3).join(' | '));

    const { data } = await client.send('Page.captureScreenshot', { format: 'png', captureBeyondViewport: false }, sessionId);
    const file = join(outDir, `${shot.name}.png`);
    writeFileSync(file, Buffer.from(data, 'base64'));
    check(`${shot.name} : capture écrite`, true, file);
    await client.send('Target.closeTarget', { targetId });
  }

  client.ws.close();
} catch (err) {
  check('exception', false, String(err));
} finally {
  browser?.kill('SIGTERM');
  srv?.kill('SIGTERM');
  await sleep(1200);
  rmSync(tmp, { recursive: true, force: true });
  const failed = results.filter((r) => !r.ok);
  console.log(failed.length === 0 ? `\nVERIFY UI: ALL GREEN (captures dans ${outDir})` : `\nVERIFY UI: ${failed.length} FAILURE(S)`);
  process.exit(failed.length === 0 ? 0 : 1);
}