import { sql } from '@vercel/postgres';
import { getUserFromRequest } from '../../../lib/permission-middleware';
import { checkImportRateLimit } from '../../../lib/rate-limit.js';

export default async function handler(req, res) {
  if (req.method !== 'POST') {
    return res.status(405).json({ error: 'Method not allowed' });
  }

  const user = await getUserFromRequest(req);
  if (!user) {
    return res.status(401).json({ error: 'Authentication required' });
  }
  if (user.role !== 'admin') {
    return res.status(403).json({ error: 'Admin access required' });
  }

  const { allowed, reset } = await checkImportRateLimit(req, user.userId);
  if (!allowed) {
    res.setHeader('Retry-After', Math.ceil((reset - Date.now()) / 1000));
    return res.status(429).json({ error: 'Too many attempts. Try again later.' });
  }

  try {
    const { setCode } = req.body;
    
    if (!setCode) {
      return res.status(400).json({ error: 'Set code is required' });
    }

    // Fetch cards from Scryfall API
    const response = await fetch(`https://api.scryfall.com/cards/search?q=set:${setCode}`);
    
    if (!response.ok) {
      throw new Error(`Scryfall API error: ${response.status}`);
    }

    const data = await response.json();
    const cards = data.data || [];

    let importedCount = 0;
    let skippedCount = 0;

    for (const card of cards) {
      try {
        // Check if card already exists
        const existingCard = await sql`
          SELECT id FROM cards WHERE scryfall_id = ${card.id}
        `;

        if (existingCard.rows.length > 0) {
          skippedCount++;
          continue;
        }

        // Extract price data
        let currentPrice = null;
        let marketPrice = null;

        if (card.prices) {
          currentPrice = card.prices.usd ? parseFloat(card.prices.usd) : null;
          marketPrice = card.prices.usd_foil ? parseFloat(card.prices.usd_foil) : null;
        }

        // Insert card into database
        await sql`
          INSERT INTO cards (
            name, set_name, set_code, card_number, rarity, game,
            mana_cost, cmc, card_type, colors, oracle_text,
            power, toughness, image_url, stock_image_url,
            current_price, market_price, scryfall_id, verified
          ) VALUES (
            ${card.name}, ${card.set_name}, ${card.set}, ${card.collector_number},
            ${card.rarity}, 'MTG', ${card.mana_cost || null}, ${card.cmc || null},
            ${card.type_line}, ${JSON.stringify(card.colors || [])},
            ${card.oracle_text || null}, ${card.power || null}, ${card.toughness || null},
            ${card.image_uris?.normal || null}, ${card.image_uris?.art_crop || null},
            ${currentPrice}, ${marketPrice}, ${card.id}, true
          )
        `;

        importedCount++;
      } catch (error) {
        console.error(`Error importing card ${card.name}:`, error);
        skippedCount++;
      }
    }

    res.status(200).json({
      success: true,
      message: `Import completed for set ${setCode}`,
      imported: importedCount,
      skipped: skippedCount,
      total: cards.length
    });

  } catch (error) {
    console.error('Card import error:', error);
    res.status(500).json({ 
      error: 'Import failed', 
      details: error.message 
    });
  }
}