#!/usr/bin/env node

/**
 * WordPress Export Analysis Script
 * Quickly analyzes exported data without loading large files entirely
 */

const fs = require('fs');
const path = require('path');

const DATA_DIR = path.join(__dirname, '..', 'data', 'raw');

// Find the latest export directory
function getLatestExportDir() {
  if (!fs.existsSync(DATA_DIR)) {
    console.error('❌ No data directory found');
    process.exit(1);
  }
  
  const dirs = fs.readdirSync(DATA_DIR).filter(f => {
    const stat = fs.statSync(path.join(DATA_DIR, f));
    return stat.isDirectory();
  });
  
  if (dirs.length === 0) {
    console.error('❌ No export directories found');
    process.exit(1);
  }
  
  // Sort by name (timestamp) and get latest
  dirs.sort().reverse();
  return path.join(DATA_DIR, dirs[0]);
}

// Quick file analysis
function analyzeFile(filePath, sampleSize = 3) {
  if (!fs.existsSync(filePath)) {
    return null;
  }
  
  const stats = fs.statSync(filePath);
  const content = fs.readFileSync(filePath, 'utf8');
  const lines = content.split('\n');
  
  // Parse JSON safely
  let data;
  try {
    data = JSON.parse(content);
  } catch (e) {
    return { error: 'Invalid JSON' };
  }
  
  const isArray = Array.isArray(data);
  const count = isArray ? data.length : (data.menus ? data.menus.length : 0);
  
  // Get sample items
  const sample = isArray ? data.slice(0, sampleSize) : (data.menus ? data.menus.slice(0, sampleSize) : []);
  
  return {
    size: stats.size,
    sizeHuman: `${(stats.size / 1024).toFixed(1)} KB`,
    lines: lines.length,
    count: count,
    sample: sample,
    isArray: isArray
  };
}

// Main analysis
function main() {
  const exportDir = getLatestExportDir();
  console.log('📊 WordPress Export Analysis');
  console.log('============================');
  console.log(`Directory: ${path.basename(exportDir)}\n`);
  
  const files = [
    'site-info.json',
    'translation-mapping.json',
    'pages.en.json',
    'pages.de.json',
    'posts.en.json',
    'posts.de.json',
    'products.en.json',
    'products.de.json',
    'product-categories.en.json',
    'product-categories.de.json',
    'menus.en.json',
    'menus.de.json',
    'redirects.json',
    'media.json'
  ];
  
  const results = {};
  
  files.forEach(file => {
    const filePath = path.join(exportDir, file);
    const analysis = analyzeFile(filePath, 2);
    if (analysis) {
      results[file] = analysis;
    }
  });
  
  // Summary
  console.log('📋 EXPORT SUMMARY');
  console.log('=================\n');
  
  // Content counts
  const pagesEN = results['pages.en.json']?.count || 0;
  const pagesDE = results['pages.de.json']?.count || 0;
  const postsEN = results['posts.en.json']?.count || 0;
  const postsDE = results['posts.de.json']?.count || 0;
  const productsEN = results['products.en.json']?.count || 0;
  const productsDE = results['products.de.json']?.count || 0;
  const categoriesEN = results['product-categories.en.json']?.count || 0;
  const categoriesDE = results['product-categories.de.json']?.count || 0;
  const media = results['media.json']?.count || 0;
  const redirects = results['redirects.json']?.count || 0;
  
  console.log('📄 Content by Type & Language:');
  console.log(`   Pages:     EN: ${pagesEN} | DE: ${pagesDE} | Total: ${pagesEN + pagesDE}`);
  console.log(`   Posts:     EN: ${postsEN} | DE: ${postsDE} | Total: ${postsEN + postsDE}`);
  console.log(`   Products:  EN: ${productsEN} | DE: ${productsDE} | Total: ${productsEN + productsDE}`);
  console.log(`   Categories: EN: ${categoriesEN} | DE: ${categoriesDE} | Total: ${categoriesEN + categoriesDE}`);
  console.log(`   Media:     ${media} files`);
  console.log(`   Redirects: ${redirects} rules\n`);
  
  // Translation mapping
  const translation = results['translation-mapping.json']?.sample?.[0] || results['translation-mapping.json']?.sample;
  if (translation) {
    const pagePairs = Object.keys(translation.pages || {}).length;
    const postPairs = Object.keys(translation.posts || {}).length;
    const productPairs = Object.keys(translation.products || {}).length;
    const categoryPairs = Object.keys(translation.productCategories || {}).length;
    
    console.log('🌐 Translation Pairs:');
    console.log(`   Pages: ${pagePairs}`);
    console.log(`   Posts: ${postPairs}`);
    console.log(`   Products: ${productPairs}`);
    console.log(`   Categories: ${categoryPairs}`);
    console.log(`   Total: ${pagePairs + postPairs + productPairs + categoryPairs}\n`);
  }
  
  // File sizes
  console.log('💾 File Sizes:');
  Object.entries(results).forEach(([file, data]) => {
    console.log(`   ${file.padEnd(30)} ${data.sizeHuman}`);
  });
  
  // Sample data
  console.log('\n🔍 Sample Data (first item from each):');
  
  if (results['pages.en.json']?.sample?.[0]) {
    const page = results['pages.en.json'].sample[0];
    console.log(`\n   Page (EN): "${page.titleHtml}"`);
    console.log(`   Path: ${page.path}`);
    console.log(`   Slug: ${page.slug}`);
  }
  
  if (results['posts.en.json']?.sample?.[0]) {
    const post = results['posts.en.json'].sample[0];
    console.log(`\n   Post (EN): "${post.titleHtml}"`);
    console.log(`   Path: ${post.path}`);
    console.log(`   Date: ${post.datePublished}`);
  }
  
  if (results['products.en.json']?.sample?.[0]) {
    const product = results['products.en.json'].sample[0];
    console.log(`\n   Product (EN): "${product.name}"`);
    console.log(`   Path: ${product.path}`);
    console.log(`   SKU: ${product.sku}`);
    console.log(`   Price: ${product.regularPrice} ${product.currency}`);
  }
  
  if (results['menus.en.json']?.sample?.[0]) {
    const menu = results['menus.en.json'].sample[0];
    console.log(`\n   Menu (EN): "${menu.name}"`);
    console.log(`   Slug: ${menu.slug}`);
    console.log(`   Items: ${menu.items ? menu.items.length : 0}`);
  }
  
  // Data quality checks
  console.log('\n✅ Data Quality Checks:');
  
  const checks = [
    {
      name: 'Both languages present',
      pass: pagesEN > 0 && pagesDE > 0 && postsEN > 0 && postsDE > 0
    },
    {
      name: 'Translation pairs exist',
      pass: (results['translation-mapping.json']?.sample && 
             Object.keys(results['translation-mapping.json'].sample.pages || {}).length > 0)
    },
    {
      name: 'Media files downloaded',
      pass: media > 0
    },
    {
      name: 'Redirects generated',
      pass: redirects > 0
    },
    {
      name: 'Site info complete',
      pass: results['site-info.json']?.sample?.siteTitle !== undefined
    }
  ];
  
  checks.forEach(check => {
    console.log(`   ${check.pass ? '✅' : '❌'} ${check.name}`);
  });
  
  // Recommendations
  console.log('\n💡 Recommendations:');
  
  if (postsEN === 0 || postsDE === 0) {
    console.log('   ⚠️  No posts found in one or both languages');
  }
  
  if (results['translation-mapping.json']?.sample) {
    const mapping = results['translation-mapping.json'].sample;
    const missingPosts = Object.keys(mapping.posts || {}).length === 0;
    if (missingPosts) {
      console.log('   ⚠️  No post translation pairs found - check if posts have matching slugs');
    }
  }
  
  if (media === 0) {
    console.log('   ⚠️  No media files downloaded - check API permissions');
  }
  
  console.log('\n🎯 Next Steps:');
  console.log('   1. Review sample data above for accuracy');
  console.log('   2. Check translation mapping for completeness');
  console.log('   3. Verify media files are properly named');
  console.log('   4. Proceed to Next.js data processing');
}

if (require.main === module) {
  main();
}