#!/usr/bin/env node
/**
 * REAL SEO Verification Test
 * Tests actual rendered HTML output, not just file existence
 */

const https = require('https');
const http = require('http');

const BASE_URL = 'localhost';
const PORT = 3000;

function fetchPage(path) {
  return new Promise((resolve, reject) => {
    const req = http.get({ hostname: BASE_URL, port: PORT, path }, (res) => {
      let data = '';
      res.on('data', chunk => data += chunk);
      res.on('end', () => resolve(data));
    });
    req.on('error', reject);
    req.setTimeout(5000, () => {
      req.destroy();
      reject(new Error('Timeout'));
    });
  });
}

function extractMetaTags(html) {
  const tags = {};
  
  // Title
  const titleMatch = html.match(/<title>([^<]*)<\/title>/);
  if (titleMatch) tags.title = titleMatch[1];
  
  // Meta description
  const descMatch = html.match(/<meta[^>]*name="description"[^>]*content="([^"]*)"[^>]*>/);
  if (descMatch) tags.description = descMatch[1];
  
  // Meta keywords
  const keywordsMatch = html.match(/<meta[^>]*name="keywords"[^>]*content="([^"]*)"[^>]*>/);
  if (keywordsMatch) tags.keywords = keywordsMatch[1];
  
  // Canonical
  const canonicalMatch = html.match(/<link[^>]*rel="canonical"[^>]*href="([^"]*)"[^>]*>/);
  if (canonicalMatch) tags.canonical = canonicalMatch[1];
  
  // Robots
  const robotsMatch = html.match(/<meta[^>]*name="robots"[^>]*content="([^"]*)"[^>]*>/);
  if (robotsMatch) tags.robots = robotsMatch[1];
  
  // OpenGraph tags
  const ogTitle = html.match(/<meta[^>]*property="og:title"[^>]*content="([^"]*)"[^>]*>/);
  if (ogTitle) tags.ogTitle = ogTitle[1];
  
  const ogDesc = html.match(/<meta[^>]*property="og:description"[^>]*content="([^"]*)"[^>]*>/);
  if (ogDesc) tags.ogDescription = ogDesc[1];
  
  const ogUrl = html.match(/<meta[^>]*property="og:url"[^>]*content="([^"]*)"[^>]*>/);
  if (ogUrl) tags.ogUrl = ogUrl[1];
  
  // Twitter cards
  const twitterCard = html.match(/<meta[^>]*name="twitter:card"[^>]*content="([^"]*)"[^>]*>/);
  if (twitterCard) tags.twitterCard = twitterCard[1];
  
  return tags;
}

function checkJsonLd(html) {
  const schemas = [];
  const scriptMatches = html.matchAll(/<script[^>]*type="application\/ld\+json"[^>]*>([\s\S]*?)<\/script>/g);
  
  for (const match of scriptMatches) {
    try {
      const json = JSON.parse(match[1]);
      schemas.push(json);
    } catch (e) {
      // Invalid JSON, skip
    }
  }
  
  return schemas;
}

async function runTests() {
  console.log('🔍 Testing ACTUAL Rendered SEO Output...\n');
  console.log(`Testing: http://${BASE_URL}:${PORT}/sr\n`);
  
  try {
    const html = await fetchPage('/sr');
    
    console.log('✅ Page fetched successfully');
    console.log(`   Size: ${(html.length / 1024).toFixed(1)} KB\n`);
    
    // Test 1: Meta Tags
    console.log('📋 META TAGS:');
    const meta = extractMetaTags(html);
    
    console.log(`   Title: ${meta.title ? '✅ ' + meta.title.substring(0, 60) + '...' : '❌ MISSING'}`);
    console.log(`   Description: ${meta.description ? '✅ ' + meta.description.substring(0, 60) + '...' : '❌ MISSING'}`);
    console.log(`   Keywords: ${meta.keywords ? '✅ ' + meta.keywords.split(',').length + ' keywords' : '❌ MISSING'}`);
    console.log(`   Canonical: ${meta.canonical ? '✅ ' + meta.canonical : '❌ MISSING'}`);
    console.log(`   Robots: ${meta.robots ? '✅ ' + meta.robots : '❌ MISSING'}`);
    console.log();
    
    // Test 2: OpenGraph
    console.log('📱 OPEN GRAPH:');
    console.log(`   og:title: ${meta.ogTitle ? '✅ Present' : '❌ MISSING'}`);
    console.log(`   og:description: ${meta.ogDescription ? '✅ Present' : '❌ MISSING'}`);
    console.log(`   og:url: ${meta.ogUrl ? '✅ ' + meta.ogUrl : '❌ MISSING'}`);
    console.log();
    
    // Test 3: Twitter Cards
    console.log('🐦 TWITTER CARDS:');
    console.log(`   twitter:card: ${meta.twitterCard ? '✅ ' + meta.twitterCard : '❌ MISSING'}`);
    console.log();
    
    // Test 4: JSON-LD Schemas
    console.log('🏗️  JSON-LD SCHEMAS:');
    const schemas = checkJsonLd(html);
    console.log(`   Found: ${schemas.length} schema(s)`);
    
    schemas.forEach((schema, i) => {
      console.log(`   Schema ${i + 1}: ✅ @type="${schema['@type']}"`);
    });
    console.log();
    
    // Summary
    const hasTitle = !!meta.title;
    const hasDesc = !!meta.description;
    const hasKeywords = !!meta.keywords;
    const hasCanonical = !!meta.canonical;
    const hasOg = !!meta.ogTitle;
    const hasTwitter = !!meta.twitterCard;
    const hasSchemas = schemas.length > 0;
    
    const passed = [hasTitle, hasDesc, hasKeywords, hasCanonical, hasOg, hasTwitter, hasSchemas].filter(Boolean).length;
    const total = 7;
    
    console.log('='.repeat(50));
    console.log(`Results: ${passed}/${total} checks passed`);
    console.log('='.repeat(50));
    
    if (passed === total) {
      console.log('\n🎉 All SEO elements are rendering correctly!');
      process.exit(0);
    } else {
      console.log(`\n⚠️  ${total - passed} SEO element(s) missing`);
      process.exit(1);
    }
    
  } catch (error) {
    console.error('\n❌ Error:', error.message);
    console.log('\nMake sure the dev server is running on port 3000');
    process.exit(1);
  }
}

runTests();