// test_multiverse.js — Playwright test for multiverse demo (per-package layout)
const { chromium } = require('playwright');

(async () => {
  const browser = await chromium.launch();
  const page = await browser.newPage();

  const consoleMessages = [];
  page.on('console', msg => consoleMessages.push(msg.text()));

  const errors = [];
  page.on('pageerror', err => errors.push(err.message));

  console.log('Navigating to demo5_multiverse.html...');
  await page.goto('http://localhost:8080/odoc-interactive-extension/demo5_multiverse.html');

  // Wait for cells to render and execute (worker init + universe linking + eval)
  console.log('Waiting for cells to execute...');
  await page.waitForTimeout(15000);

  // Check multiverse-specific behavior in console
  const hasWorkerFrom9090 = consoleMessages.some(m =>
    m.includes('9090'));
  const hasStdlibFallback = consoleMessages.some(m =>
    m.includes('stdlib_dcs not found') && m.includes('findlib discovery'));
  const hasStdlibDiscovered = consoleMessages.some(m =>
    m.includes('Found stdlib dcs via findlib'));
  const hasDcsRewrite = consoleMessages.some(m =>
    m.includes('Rewriting dcs_url'));
  const hasUniverseLinking = consoleMessages.some(m =>
    m.includes('universes'));
  const hasInitFinished = consoleMessages.some(m =>
    m.includes('init() finished'));
  const hasSetupFinished = consoleMessages.some(m =>
    m.includes('setup() finished'));
  const hasInitError = consoleMessages.some(m =>
    m.includes('init_error'));

  // Check for correct outputs
  const hasInt7 = consoleMessages.some(m =>
    m.includes('int = 7'));
  const hasGreeting = consoleMessages.some(m =>
    m.includes('Hello, Multiverse World'));
  const hasYojsonLoaded = consoleMessages.some(m =>
    m.includes('Custom #require: yojson loaded'));
  const hasJsonOutput = consoleMessages.some(m =>
    m.includes('"source": "multiverse"') || m.includes('multiverse'));

  console.log('');
  console.log('=== Results ===');
  console.log(`  Worker loaded from port 9090:   ${hasWorkerFrom9090 ? 'YES' : 'NO'}`);
  console.log(`  stdlib_dcs fallback triggered:   ${hasStdlibFallback ? 'YES' : 'NO'}`);
  console.log(`  Stdlib discovered via findlib:   ${hasStdlibDiscovered ? 'YES' : 'NO'}`);
  console.log(`  dcs_url rewritten to absolute:   ${hasDcsRewrite ? 'YES' : 'NO'}`);
  console.log(`  Universe linking used:           ${hasUniverseLinking ? 'YES' : 'NO'}`);
  console.log(`  Init completed:                  ${hasInitFinished ? 'YES' : 'NO'}`);
  console.log(`  Setup completed:                 ${hasSetupFinished ? 'YES' : 'NO'}`);
  console.log(`  Init error:                      ${hasInitError ? 'YES (BAD)' : 'NO (good)'}`);
  console.log(`  Output "int = 7":                ${hasInt7 ? 'YES' : 'NO'}`);
  console.log(`  Output "Hello, Multiverse":      ${hasGreeting ? 'YES' : 'NO'}`);
  console.log(`  Yojson loaded via #require:       ${hasYojsonLoaded ? 'YES' : 'NO'}`);
  console.log(`  JSON output with "multiverse":   ${hasJsonOutput ? 'YES' : 'NO'}`);

  let passed = true;

  if (!hasStdlibFallback) {
    console.log('\nFAIL: stdlib_dcs fallback was not triggered (multiverse needs it)');
    passed = false;
  }
  if (!hasStdlibDiscovered) {
    console.log('\nFAIL: Stdlib was not discovered via findlib universe linking');
    passed = false;
  }
  if (!hasDcsRewrite) {
    console.log('\nFAIL: dcs_url was not rewritten to absolute URL');
    passed = false;
  }
  if (!hasInitFinished) {
    console.log('\nFAIL: Worker init did not complete');
    passed = false;
  }
  if (!hasSetupFinished) {
    console.log('\nFAIL: Worker setup did not complete');
    passed = false;
  }
  if (hasInitError) {
    console.log('\nFAIL: Worker reported init_error');
    const errMsg = consoleMessages.find(m => m.includes('init_error'));
    console.log(`  ${errMsg}`);
    passed = false;
  }
  if (!hasInt7) {
    console.log('\nFAIL: Expected output "int = 7" not found');
    passed = false;
  }
  if (!hasGreeting) {
    console.log('\nFAIL: Expected output "Hello, Multiverse World" not found');
    passed = false;
  }
  if (!hasYojsonLoaded) {
    console.log('\nFAIL: Yojson was not loaded via #require');
    passed = false;
  }

  if (passed) {
    console.log('\nPASS: Multiverse demo working correctly');
  } else {
    console.log('\n--- Console messages (last 50) ---');
    consoleMessages.slice(-50).forEach(m => console.log(`  ${m.substring(0, 200)}`));
  }

  await browser.close();
  process.exit(passed ? 0 : 1);
})();