import assert from 'node:assert/strict';
import { createServer } from 'node:http';
import { readFile } from 'node:fs/promises';
import { resolve, extname, sep } from 'node:path';
import { fileURLToPath } from 'node:url';

// Run after npm run build, with an existing Playwright/Chromium installation:
// PLAYWRIGHT_MODULE=/path/to/playwright-core/index.mjs CHROME_EXECUTABLE=/path/to/chrome
// node tests/pwa.browser.mjs
// This serves the real production bundle and service worker on loopback. No live API is used.
const { chromium } = await import(process.env.PLAYWRIGHT_MODULE || 'playwright-core');
const root = fileURLToPath(new URL('../dist/', import.meta.url));
await readFile(resolve(root, 'sw.js'));
const types = { '.html': 'text/html', '.js': 'text/javascript', '.css': 'text/css', '.json': 'application/json', '.webmanifest': 'application/manifest+json', '.png': 'image/png', '.ttf': 'font/ttf' };
const server = createServer(async (request, response) => {
  const path = new URL(request.url, 'http://localhost').pathname;
  if (path.startsWith('/api/')) {
    response.writeHead(401, { 'Content-Type': 'application/json', 'Cache-Control': 'no-store' });
    response.end(JSON.stringify({ error: true, message: 'missing bearer token', statusCode: 401 }));
    return;
  }
  const file = resolve(root, '.' + (path === '/' ? '/index.html' : path));
  if (!file.startsWith(root.endsWith(sep) ? root : root + sep)) { response.writeHead(404); response.end(); return; }
  try {
    const bytes = await readFile(file);
    response.writeHead(200, { 'Content-Type': types[extname(file)] || 'application/octet-stream', 'Cache-Control': 'no-store' });
    response.end(bytes);
  } catch { response.writeHead(404); response.end(); }
});
await new Promise(resolve => server.listen(0, '127.0.0.1', resolve));
const browser = await chromium.launch({ executablePath: process.env.CHROME_EXECUTABLE || undefined, headless: true,
  ...(process.env.BROWSER_NO_SANDBOX === '1' ? { args: ['--no-sandbox'] } : {}) });
try {
  const context = await browser.newContext({ serviceWorkers: 'allow' });
  await context.route('https://fonts.googleapis.com/**', route => route.abort());
  await context.route('https://fonts.gstatic.com/**', route => route.abort());
  const page = await context.newPage();
  const errors = []; page.on('pageerror', error => errors.push(error.message));
  await page.goto(`http://127.0.0.1:${server.address().port}/`, { waitUntil: 'domcontentloaded', timeout: 15_000 });
  // Activation must settle before a worker-controlled navigation can finish.
  await page.waitForFunction(() => navigator.serviceWorker.controller?.state === 'activated', undefined, { timeout: 15_000 });
  await page.getByPlaceholder('ADMIN_TOKEN').waitFor({ timeout: 5_000 });
  await page.getByPlaceholder('ADMIN_TOKEN').fill('local-login-fixture');
  assert.equal(await page.getByPlaceholder('ADMIN_TOKEN').inputValue(), 'local-login-fixture');
  assert.equal(await page.getByRole('button', { name: 'Sign in', exact: true }).isEnabled(), true);
  await page.reload({ waitUntil: 'domcontentloaded', timeout: 10_000 });
  await page.getByPlaceholder('ADMIN_TOKEN').waitFor({ timeout: 5_000 });
  assert.equal(await page.evaluate(() => navigator.serviceWorker.controller?.state), 'activated');
  assert.deepEqual(errors, []);
  console.log('PASS first-visit service-worker activation, stable sign-in form, and controlled reload');
} finally {
  await browser.close();
  server.closeAllConnections();
  await new Promise(resolve => server.close(resolve));
}