import { firefox } from 'playwright';
import { pool } from './src/db/migrate.js';
import { getRandomProxy } from './src/utils/proxyManager.js';

const workerNum = process.argv[2] || `P${Date.now().toString().slice(-4)}`;
const dispensaryId = parseInt(process.argv[3] || '112', 10);
const batchSize = 10; // Process 10 products per batch

interface Product {
  id: number;
  slug: string;
  name: string;
  brand: string;
  dutchie_url: string;
}

async function getProductsNeedingPrices(limit: number): Promise<Product[]> {
  const result = await pool.query(`
    SELECT id, slug, name, brand, dutchie_url
    FROM products
    WHERE dispensary_id = $1
      AND regular_price IS NULL
      AND dutchie_url IS NOT NULL
    ORDER BY id
    LIMIT $2
  `, [dispensaryId, limit]);

  return result.rows;
}

async function extractPriceFromPage(page: any, productUrl: string): Promise<{
  regularPrice?: number;
  salePrice?: number;
}> {
  try {
    console.log(`[${workerNum}]   Loading: ${productUrl}`);

    await page.goto(productUrl, {
      waitUntil: 'domcontentloaded',
      timeout: 30000
    });

    await page.waitForTimeout(2000);

    // Extract price data from the page
    const priceData = await page.evaluate(() => {
      // Try JSON-LD structured data first
      const scripts = Array.from(document.querySelectorAll('script[type="application/ld+json"]'));

      for (const script of scripts) {
        try {
          const data = JSON.parse(script.textContent || '');
          if (data['@type'] === 'Product' && data.offers) {
            return {
              regularPrice: parseFloat(data.offers.price) || undefined,
              salePrice: undefined
            };
          }
        } catch (e) {
          // Continue to next script
        }
      }

      // Fallback: extract from page text
      const pageText = document.body.textContent || '';

      // Look for price patterns like $30.00, $40.00
      const priceMatches = pageText.match(/\$(\d+\.?\d*)/g);

      if (priceMatches && priceMatches.length > 0) {
        const prices = priceMatches.map(p => parseFloat(p.replace('$', '')));

        // If we find multiple prices, assume first is sale, second is regular
        if (prices.length >= 2) {
          return {
            salePrice: Math.min(prices[0], prices[1]),
            regularPrice: Math.max(prices[0], prices[1])
          };
        } else if (prices.length === 1) {
          return {
            regularPrice: prices[0],
            salePrice: undefined
          };
        }
      }

      return { regularPrice: undefined, salePrice: undefined };
    });

    return priceData;

  } catch (error: any) {
    console.log(`[${workerNum}]   ⚠️  Error loading page: ${error.message}`);
    return { regularPrice: undefined, salePrice: undefined };
  }
}

async function updateProductPrice(
  productId: number,
  regularPrice?: number,
  salePrice?: number
): Promise<void> {
  await pool.query(`
    UPDATE products
    SET regular_price = $1,
        sale_price = $2,
        updated_at = CURRENT_TIMESTAMP
    WHERE id = $3
  `, [regularPrice || null, salePrice || null, productId]);
}

async function main() {
  console.log(`\n${'='.repeat(70)}`);
  console.log(`💰 PRICE ENRICHMENT WORKER - ${workerNum}`);
  console.log(`   Dispensary ID: ${dispensaryId}`);
  console.log(`   Batch Size: ${batchSize} products`);
  console.log(`${'='.repeat(70)}\n`);

  // Get dispensary info
  const dispensaryResult = await pool.query(
    "SELECT id, name, menu_url FROM dispensaries WHERE id = $1",
    [dispensaryId]
  );

  if (dispensaryResult.rows.length === 0) {
    console.error(`[${workerNum}] ❌ Dispensary ID ${dispensaryId} not found`);
    process.exit(1);
  }

  console.log(`[${workerNum}] ✅ Dispensary: ${dispensaryResult.rows[0].name}\n`);

  // Get proxy
  const proxy = await getRandomProxy();
  if (!proxy) {
    console.log(`[${workerNum}] ❌ No proxy available`);
    process.exit(1);
  }

  console.log(`[${workerNum}] 🔐 Using proxy: ${proxy.server}\n`);

  // Launch browser
  const browser = await firefox.launch({ headless: true });

  const context = await browser.newContext({
    viewport: { width: 1920, height: 1080 },
    userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36',
    proxy: {
      server: proxy.server,
      username: proxy.username,
      password: proxy.password
    }
  });

  const page = await context.newPage();

  let totalProcessed = 0;
  let totalWithPrices = 0;
  let totalNoPrices = 0;
  let batchNum = 0;

  // Keep processing batches
  while (true) {
    const products = await getProductsNeedingPrices(batchSize);

    if (products.length === 0) {
      console.log(`[${workerNum}] ℹ️  No more products need price enrichment`);
      break;
    }

    batchNum++;
    console.log(`[${workerNum}] ${'─'.repeat(70)}`);
    console.log(`[${workerNum}] 📦 BATCH #${batchNum}: Processing ${products.length} products`);
    console.log(`[${workerNum}] ${'─'.repeat(70)}\n`);

    for (let i = 0; i < products.length; i++) {
      const product = products[i];

      console.log(`[${workerNum}] [${i + 1}/${products.length}] ${product.brand} - ${product.name.substring(0, 40)}`);

      const { regularPrice, salePrice } = await extractPriceFromPage(page, product.dutchie_url);

      await updateProductPrice(product.id, regularPrice, salePrice);

      totalProcessed++;

      if (regularPrice || salePrice) {
        totalWithPrices++;
        const priceStr = salePrice
          ? `Sale: $${salePrice.toFixed(2)} (Reg: $${regularPrice?.toFixed(2) || 'N/A'})`
          : `Price: $${regularPrice?.toFixed(2)}`;
        console.log(`[${workerNum}]   ✅ ${priceStr}`);
      } else {
        totalNoPrices++;
        console.log(`[${workerNum}]   ⚠️  No price found`);
      }

      // Small delay between products
      await page.waitForTimeout(500);
    }

    console.log(`\n[${workerNum}] ✅ Batch #${batchNum} complete\n`);

    // Delay between batches
    await page.waitForTimeout(2000);
  }

  console.log(`\n[${workerNum}] ${'='.repeat(70)}`);
  console.log(`[${workerNum}] ✅ PRICE ENRICHMENT COMPLETE`);
  console.log(`[${workerNum}]    Products processed: ${totalProcessed}`);
  console.log(`[${workerNum}]    Products with prices: ${totalWithPrices}`);
  console.log(`[${workerNum}]    Products without prices: ${totalNoPrices}`);
  console.log(`[${workerNum}] ${'='.repeat(70)}\n`);

  await browser.close();
  await pool.end();
}

main().catch(console.error);