/**
 * Deterministic Form A adapter check. Build the requested mode first, then
 * run this against a loopback-only Astro preview. Every external request is
 * intercepted and aborted before it can leave the browser.
 *
 * FORM_A_IFRAME_BROWSER_MODE=isolated-test \
 * PLAYWRIGHT_MODULE=/path/to/playwright/index.mjs \
 * CHROMIUM_EXECUTABLE=/path/to/chromium node tools/jotform-form-a-browser.mjs
 */
import assert from 'node:assert/strict';
import fs from 'node:fs/promises';
import http from 'node:http';
import net from 'node:net';
import path from 'node:path';
import { spawn } from 'node:child_process';
import { fileURLToPath, pathToFileURL } from 'node:url';
import { setTimeout as delay } from 'node:timers/promises';

const root = fileURLToPath(new URL('../', import.meta.url));
const moduleName = process.env.PLAYWRIGHT_MODULE ? pathToFileURL(path.resolve(process.env.PLAYWRIGHT_MODULE)).href : 'playwright';
const mode = process.env.FORM_A_IFRAME_BROWSER_MODE ?? 'off';
if (!['off', 'mock', 'isolated-test', 'production'].includes(mode)) throw new Error(`Unsupported Form A browser mode: ${mode}`);

const expectedIframe = mode === 'isolated-test' || mode === 'production';
const expectedFormMode = mode === 'production' ? 'live' : 'isolated-test';
const expectedEnvironment = mode === 'production' ? 'production' : 'isolated-test';
const routes = [
  { route: '/contact', locale: 'en', context: 'contact', screenshot: 'contact' },
  { route: '/es/contact', locale: 'es', context: 'contact', screenshot: 'es-contact' },
  { route: '/lp/aba-therapy', locale: 'en', context: 'landing', screenshot: 'aba-therapy' },
  { route: '/lp/aba-insurance', locale: 'en', context: 'landing', screenshot: 'aba-insurance' },
  { route: '/lp/aba-ahcccs', locale: 'en', context: 'landing', screenshot: 'aba-ahcccs' },
  { route: '/lp/aba-private-pay', locale: 'en', context: 'landing', screenshot: 'aba-private-pay' },
  { route: '/lp/early-intervention', locale: 'en', context: 'landing', screenshot: 'early-intervention' },
];
const widths = [320, 390, 768, 1440];
const output = await fs.mkdtemp('/tmp/aia-form-a-iframe-');
const evidence = { mode, routes, widths, checks: 0, fallbackChecks: [], blocked: [], jotformAttempts: [], screenshots: [], status: 'failed' };
const reserve = net.createServer();
await new Promise((resolve, reject) => { reserve.once('error', reject); reserve.listen(0, '127.0.0.1', resolve); });
const port = reserve.address().port;
await new Promise((resolve) => reserve.close(resolve));
const origin = `http://127.0.0.1:${port}`;
let browser;
let preview;

try {
  const { chromium } = await import(moduleName);
  browser = await chromium.launch(process.env.CHROMIUM_EXECUTABLE ? { headless: true, executablePath: process.env.CHROMIUM_EXECUTABLE } : { headless: true });
  preview = spawn(process.execPath, ['node_modules/astro/bin/astro.mjs', 'preview', '--host', '127.0.0.1', '--port', String(port)], {
    cwd: root,
    env: { ...process.env, ASTRO_TELEMETRY_DISABLED: '1' },
    stdio: 'ignore',
  });
  const reachable = () => new Promise((resolve) => {
    const request = http.get(origin + '/', (response) => { response.resume(); resolve(response.statusCode === 200); });
    request.setTimeout(500, () => request.destroy());
    request.on('error', () => resolve(false));
  });
  for (let i = 0; i < 60 && !(await reachable()); i++) await delay(250);
  assert.equal(await reachable(), true, 'Loopback preview did not become reachable');

  for (const width of widths) {
    const context = await browser.newContext({ viewport: { width, height: width < 500 ? 844 : 960 }, serviceWorkers: 'block' });
    await context.routeWebSocket('**/*', (socket) => socket.close());
    await context.route('**/*', async (route) => {
      const request = route.request();
      const url = new URL(request.url());
      if (url.origin === origin && ['GET', 'HEAD'].includes(request.method())) return route.continue();
      const item = { origin: url.origin, path: url.pathname, search: url.search, method: request.method() };
      evidence.blocked.push(item);
      if (url.origin === 'https://form.jotform.com') evidence.jotformAttempts.push(item);
      return route.abort();
    });
    const page = await context.newPage();
    for (const expected of routes) {
      const { route, locale, context: formContext, screenshot: screenshotName } = expected;
      evidence.checks++;
      const response = await page.goto(origin + route, { waitUntil: 'domcontentloaded', timeout: 15000 });
      assert.equal(response?.status(), 200, route);
      assert.equal(await page.locator('main h1').count(), 1, route);
      assert.equal(await page.locator('main form').count(), 0, route);
      assert.ok(await page.evaluate(() => document.documentElement.scrollWidth <= innerWidth + 1), `${route} at ${width}px has horizontal overflow`);
      const iframe = page.locator('[data-jotform-form-a] iframe');
      if (!expectedIframe) {
        assert.equal(await iframe.count(), 0, `${route} should not emit an iframe in ${mode}`);
        assert.equal(await page.locator('[data-jotform-form-a]').count(), 0, `${route} should not emit an adapter in ${mode}`);
        continue;
      }
      const expectedUrl = `https://form.jotform.com/262946078314059?formContext=${formContext}&language=${locale}`;
      assert.equal(await iframe.count(), 1, route);
      assert.equal(await iframe.getAttribute('src'), expectedUrl, route);
      assert.equal(await iframe.getAttribute('title'), locale === 'es' ? 'Formulario de consultas generales de AIA' : 'AIA general enquiries form', route);
      assert.equal(await iframe.getAttribute('referrerpolicy'), 'no-referrer', route);
      assert.equal(await iframe.getAttribute('sandbox'), 'allow-forms allow-scripts allow-same-origin', route);
      assert.equal(await page.locator(`[data-jotform-form-a][data-form-mode="${expectedFormMode}"]`).count(), 1, route);
      assert.equal(await page.locator(`[data-jotform-form-a][data-form-environment="${expectedEnvironment}"]`).count(), 1, route);
      assert.equal(await page.locator(`[data-jotform-form-a][data-form-context="${formContext}"]`).count(), 1, route);
      const frameBox = await iframe.boundingBox();
      const expectedFrameHeight = formContext === 'contact'
        ? width < 500 ? 1088 : 960
        : width < 500 ? 800 : 672;
      assert.ok(frameBox && frameBox.width > 0 && frameBox.height >= expectedFrameHeight, `${route} iframe has an insufficient context-specific responsive frame`);
      if ((route === '/contact' || route === '/es/contact') && width >= 768) {
        const copyBox = await page.locator('.contact-page__copy').boundingBox();
        const adapterBox = await page.locator('[data-jotform-form-a]').boundingBox();
        assert.ok(copyBox && adapterBox && Math.abs(copyBox.width - adapterBox.width) <= 1, `${route} should use the full desktop grid column`);
      }
      const fallback = page.locator('[data-jotform-form-a] > [data-jotform-iframe-fallback]');
      assert.equal(await fallback.count(), 1, `${route} should render one parent fallback`);
      assert.equal(await fallback.getAttribute('hidden'), '', `${route} fallback should not reserve space before timeout`);
      assert.equal(await fallback.getAttribute('aria-live'), 'polite', route);
      assert.equal(await fallback.locator('a').getAttribute('href'), expectedUrl, route);
      assert.equal(await fallback.locator('a').getAttribute('target'), '_blank', route);
      assert.equal(await fallback.locator('a').getAttribute('rel'), 'noopener noreferrer', route);
      assert.equal(await iframe.evaluate((element) => element.innerHTML.trim()), '', `${route} should not keep fallback content inside the iframe`);
      assert.equal(await page.locator('[data-jotform-form-a] .jotform-iframe__fallback--noscript').count(), 0, `${route} should not render a duplicate noscript fallback while JavaScript is enabled`);
      if (route.startsWith('/lp/')) {
        const expectedSurface = route === '/lp/early-intervention'
          ? '#consultation.lead-form > [data-jotform-form-a].jotform-iframe--embedded'
          : '.form-wrap > [data-jotform-form-a].jotform-iframe--embedded';
        assert.equal(await page.locator(expectedSurface).count(), 1, route);
        assert.equal(await page.locator('#lead-form, [data-form-a-preview], #consultation input:enabled').count(), 0, route);
        if (route !== '/lp/early-intervention') {
          assert.equal(
            await page.locator('[data-jotform-form-a] .jotform-iframe__description').innerText(),
            'Use this form to request a conversation. An AIA team member can explain the next steps for your family.',
            `${route} should use the shared iframe description instead of repeating companion copy`,
          );
        }
      }
      await iframe.focus();
      assert.equal(await page.evaluate(() => document.activeElement?.tagName), 'IFRAME', route);
      const screenshot = path.join(output, `${screenshotName}-${width}.png`);
      await page.screenshot({ path: screenshot, fullPage: true });
      evidence.screenshots.push(screenshot);
    }
    await context.close();
  }

  if (expectedIframe) {
    const context = await browser.newContext({ viewport: { width: 390, height: 844 }, javaScriptEnabled: false, serviceWorkers: 'block' });
    await context.route('**/*', async (route) => {
      const request = route.request();
      const url = new URL(request.url());
      if (url.origin === origin && ['GET', 'HEAD'].includes(request.method())) return route.continue();
      const item = { origin: url.origin, path: url.pathname, search: url.search, method: request.method(), noJavaScript: true };
      evidence.blocked.push(item);
      if (url.origin === 'https://form.jotform.com') evidence.jotformAttempts.push(item);
      return route.abort();
    });
    for (const { route, locale } of routes) {
      evidence.checks++;
      const page = await context.newPage();
      const response = await page.goto(origin + route, { waitUntil: 'domcontentloaded', timeout: 15000 });
      assert.equal(response?.status(), 200, `${route} without JavaScript`);
      assert.equal(await page.locator('[data-jotform-form-a] iframe').count(), 1, `${route} without JavaScript`);
      assert.equal(await page.locator(`[data-jotform-form-a][data-form-mode="${expectedFormMode}"]`).count(), 1, `${route} without JavaScript`);
      const iframe = page.locator('[data-jotform-form-a] iframe');
      assert.equal(await iframe.evaluate((element) => element.innerHTML.trim()), '', `${route} without JavaScript should not place fallback content inside the iframe`);
      const noscriptFallback = page.locator('[data-jotform-form-a] .jotform-iframe__fallback--noscript');
      assert.equal(await noscriptFallback.count(), 1, `${route} without JavaScript should expose one localized hosted-form fallback`);
      assert.equal(await noscriptFallback.isVisible(), true, `${route} without JavaScript fallback should be visible`);
      assert.equal(await noscriptFallback.locator('a').getAttribute('target'), '_blank', `${route} without JavaScript`);
      assert.equal(await noscriptFallback.locator('a').getAttribute('rel'), 'noopener noreferrer', `${route} without JavaScript`);
      assert.match(
        await noscriptFallback.innerText(),
        locale === 'es' ? /Si el formulario integrado no se carga,/ : /If the embedded form does not load,/,
        `${route} without JavaScript should use the localized fallback`,
      );
      if (route.startsWith('/lp/')) {
        const expectedSurface = route === '/lp/early-intervention'
          ? '#consultation.lead-form > [data-jotform-form-a].jotform-iframe--embedded'
          : '.form-wrap > [data-jotform-form-a].jotform-iframe--embedded';
        assert.equal(await page.locator(expectedSurface).count(), 1, `${route} without JavaScript`);
      }
      assert.ok(await page.evaluate(() => document.documentElement.scrollWidth <= innerWidth + 1), `${route} without JavaScript has horizontal overflow`);
    }
    await context.close();
  }

  if (expectedIframe) {
    // Exercise the first-party fallback with a local fixture. Jotform is never
    // contacted: every frame request is fulfilled or held inside Playwright.
    let fallbackScenario = 'immediate';
    let releaseLateFrame;
    let timeoutFrameRequested;
    const context = await browser.newContext({ viewport: { width: 390, height: 844 }, serviceWorkers: 'block' });
    await context.route('**/*', async (route) => {
      const request = route.request();
      const url = new URL(request.url());
      if (url.origin === origin && ['GET', 'HEAD'].includes(request.method())) return route.continue();
      const item = { origin: url.origin, path: url.pathname, search: url.search, method: request.method(), fixture: true };
      evidence.blocked.push(item);
      if (url.origin === 'https://form.jotform.com' && url.pathname === '/262946078314059') {
        evidence.jotformAttempts.push(item);
        if (fallbackScenario === 'delayed') await delay(30);
        if (fallbackScenario === 'timeout-late') {
          timeoutFrameRequested?.();
          await new Promise((resolve) => { releaseLateFrame = resolve; });
        }
        return route.fulfill({ contentType: 'text/html', body: '<!doctype html><title>Local Form A Fixture</title><p>Fixture only</p>' });
      }
      return route.abort();
    });

    const openFallbackScenario = async (name) => {
      const page = await context.newPage();
      // Keep the production 15-second timeout literal while making this local
      // fixture deterministic and fast. The override is scoped to the page.
      await page.addInitScript(() => {
        const originalSetTimeout = window.setTimeout.bind(window);
        window.setTimeout = (callback, timeout, ...args) => originalSetTimeout(callback, timeout === 15_000 ? 80 : timeout, ...args);
      });
      const response = await page.goto(origin + '/contact', { waitUntil: 'domcontentloaded', timeout: 15000 });
      assert.equal(response?.status(), 200, `fallback ${name} outer page`);
      return { page, fallback: page.locator('[data-jotform-iframe-fallback]') };
    };

    fallbackScenario = 'immediate';
    {
      const { page, fallback } = await openFallbackScenario('immediate');
      await page.waitForTimeout(30);
      assert.equal(await fallback.isVisible(), false, 'A successful iframe load keeps fallback hidden');
      evidence.fallbackChecks.push('successful-load-hidden');
      await page.close();
    }

    fallbackScenario = 'delayed';
    {
      const { page, fallback } = await openFallbackScenario('delayed');
      await page.waitForTimeout(45);
      assert.equal(await fallback.isVisible(), false, 'A delayed iframe load stays hidden before the 15-second timeout');
      evidence.fallbackChecks.push('delayed-load-hidden-before-timeout');
      await page.close();
    }

    fallbackScenario = 'timeout-late';
    {
      const requested = new Promise((resolve) => { timeoutFrameRequested = resolve; });
      const { page, fallback } = await openFallbackScenario('timeout-late');
      await requested;
      await page.waitForTimeout(100);
      assert.equal(await fallback.isVisible(), true, 'A missing iframe load reveals the accessible hosted-form fallback after timeout');
      assert.equal(await fallback.getAttribute('role'), 'status');
      releaseLateFrame?.();
      await page.waitForFunction(() => document.querySelector('[data-jotform-iframe-fallback]')?.hidden === true);
      assert.equal(await fallback.isVisible(), false, 'A late iframe load hides the timeout fallback consistently');
      evidence.fallbackChecks.push('timeout-visible', 'late-load-hidden');
      await page.close();
    }

    await context.close();
  }

  const formAttempts = evidence.jotformAttempts;
  if (expectedIframe) {
    assert.ok(formAttempts.length >= routes.length, 'Expected intercepted Jotform iframe GET attempts');
    for (const attempt of formAttempts) {
      assert.equal(attempt.method, 'GET');
      assert.equal(attempt.path, '/262946078314059');
      assert.match(attempt.search, /^\?formContext=(?:contact|landing)&language=(?:en|es)$/);
    }
  } else {
    assert.equal(formAttempts.length, 0, `${mode} attempted Jotform traffic`);
  }
  assert.equal(evidence.blocked.filter((item) => !['GET', 'HEAD'].includes(item.method)).length, 0, 'A blocked non-read request was attempted');
  evidence.status = 'passed';
} catch (error) {
  evidence.error = error instanceof Error ? error.message : String(error);
  throw error;
} finally {
  await fs.writeFile(path.join(output, 'evidence.json'), JSON.stringify(evidence, null, 2));
  if (preview && preview.exitCode === null) {
    preview.kill('SIGTERM');
    await Promise.race([new Promise((resolve) => preview.once('exit', resolve)), delay(3000)]);
    if (preview.exitCode === null) preview.kill('SIGKILL');
  }
  await browser?.close();
  console.log(JSON.stringify({ ...evidence, screenshots: evidence.screenshots.map((file) => path.basename(file)), artifactDirectory: output }, null, 2));
}