import axios from 'axios';

const API_URL = process.env.PARAPHARMACY_API_URL || 'http://localhost:3002';

const QUERIES = ['crema hidratante', 'protector solar', 'vitaminas', 'capricare'];

const SOURCES = {
  promofarma: (q) => `https://www.promofarma.com/es/search?q=${encodeURIComponent(q)}`,
  pharmarket: (q) => `https://www.pharmarket.es/catalogsearch/result/?q=${encodeURIComponent(q)}`,
};

async function scrapeSource(source, url) {
  try {
    console.log(`  🔍 Scraping ${source}: ${url}`);
    const response = await axios.get(url, {
      timeout: 15000,
      headers: {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
      }
    });
    return response.data;
  } catch (error) {
    console.error(`  ❌ Error scraping ${source}: ${error.message}`);
    return null;
  }
}

function extractProducts(html, source) {
  const products = [];
  
  // Try multiple patterns
  const patterns = [
    // Promofarma patterns
    /<div[^>]*class="[^"]*product-card[^"]*"[^>]*>([\s\S]*?)<\/div>\s*<\/div>/gi,
    /<article[^>]*class="[^"]*product[^"]*"[^>]*>([\s\S]*?)<\/article>/gi,
    // Generic patterns
    /<(?:div|li)[^>]*class="[^"]*(?:product|item)[^"]*"[^>]*>([\s\S]*?)<\/(?:div|li)>/gi,
  ];
  
  const namePatterns = [
    /<h[23][^>]*>([^<]+)<\/h[23]>/i,
    /class="[^"]*(?:name|title)[^"]*"[^>]*>([^<]+)</i,
  ];
  
  const pricePatterns = [
    /class="[^"]*price[^"]*"[^>]*>([^<]*\d+[.,]\d+[^<]*)</i,
    /(\d+[.,]\d+)\s*€/i,
  ];
  
  for (const pattern of patterns) {
    let match;
    while ((match = pattern.exec(html)) !== null) {
      const card = match[1];
      
      let name = null;
      for (const np of namePatterns) {
        const m = np.exec(card);
        if (m) { name = m[1].trim(); break; }
      }
      
      let price = 0;
      for (const pp of pricePatterns) {
        const m = pp.exec(card);
        if (m) {
          price = parseFloat(m[1].replace(/[^0-9.,]/g, '').replace(',', '.'));
          break;
        }
      }
      
      if (name && name.length > 3 && name.length < 200 && price > 0 && price < 1000) {
        products.push({
          name: name.substring(0, 200),
          price,
          source,
          source_product_id: `${source}_${Date.now()}_${Math.random().toString(36).substr(2, 6)}`,
          source_url: `https://www.${source}.com`,
          brand: '',
          category: 'parapharmacy',
          available: true,
          scraped_at: new Date().toISOString()
        });
      }
    }
  }
  
  // Deduplicate
  const seen = new Set();
  return products.filter(p => {
    const key = `${source}:${p.name.toLowerCase()}`;
    if (seen.has(key)) return false;
    seen.add(key);
    return true;
  }).slice(0, 5);
}

async function main() {
  console.log('🚀 Starting parapharmacy scraper...\n');
  
  let totalProducts = 0;
  
  for (const query of QUERIES) {
    console.log(`\n📋 Query: "${query}"`);
    
    for (const [source, urlFn] of Object.entries(SOURCES)) {
      const url = urlFn(query);
      const html = await scrapeSource(source, url);
      
      if (html) {
        const products = extractProducts(html, source);
        console.log(`  ✅ Found ${products.length} products`);
        
        if (products.length > 0) {
          try {
            await axios.post(`${API_URL}/api/products/bulk`, { products });
            totalProducts += products.length;
          } catch (error) {
            console.error(`  ❌ Error sending to API: ${error.message}`);
          }
        }
      }
    }
  }
  
  console.log(`\n📊 Scraping completed. Total products: ${totalProducts}`);
}

main().catch(error => {
  console.error('❌ Scraper failed:', error.message);
  process.exit(1);
});