import { NextResponse } from 'next/server';
import { sql } from '@vercel/postgres';
import { verifyToken } from '../setup-auth.js';

// GET /api/cards - Search cards from database
export async function GET(request) {
  try {
    const { searchParams } = new URL(request.url);
    const query = searchParams.get('q') || searchParams.get('search') || '';
    const game = searchParams.get('game');
    const page = parseInt(searchParams.get('page') || '1');
    const limit = parseInt(searchParams.get('limit') || '20');
    const offset = (page - 1) * limit;
    
    console.log(`🔍 Searching cards: "${query}" game: "${game}" page: ${page}`);
    
    // Build the SQL query
    let sqlQuery = `
      SELECT 
        id,
        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,
        verified,
        created_at,
        updated_at
      FROM cards
      WHERE 1=1
    `;
    
    const params = [];
    let paramIndex = 1;
    
    // Add search filter
    if (query.trim()) {
      sqlQuery += ` AND (
        name ILIKE $${paramIndex} OR 
        oracle_text ILIKE $${paramIndex} OR
        card_type ILIKE $${paramIndex} OR
        set_name ILIKE $${paramIndex}
      )`;
      params.push(`%${query}%`);
      paramIndex++;
    }
    
    // Add game filter
    if (game && game !== 'ALL') {
      sqlQuery += ` AND game = $${paramIndex}`;
      params.push(game);
      paramIndex++;
    }
    
    // Add ordering and pagination
    sqlQuery += ` ORDER BY name ASC LIMIT $${paramIndex} OFFSET $${paramIndex + 1}`;
    params.push(limit, offset);
    
    console.log(`📝 SQL Query: ${sqlQuery}`);
    console.log(`📝 Parameters:`, params);
    
    // Execute the query
    const result = await sql.query(sqlQuery, params);
    
    // Get total count for pagination
    let countQuery = `
      SELECT COUNT(*) as total
      FROM cards
      WHERE 1=1
    `;
    
    const countParams = [];
    let countParamIndex = 1;
    
    if (query.trim()) {
      countQuery += ` AND (
        name ILIKE $${countParamIndex} OR 
        oracle_text ILIKE $${countParamIndex} OR
        card_type ILIKE $${countParamIndex} OR
        set_name ILIKE $${countParamIndex}
      )`;
      countParams.push(`%${query}%`);
      countParamIndex++;
    }
    
    if (game && game !== 'ALL') {
      countQuery += ` AND game = $${countParamIndex}`;
      countParams.push(game);
      countParamIndex++;
    }
    
    const countResult = await sql.query(countQuery, countParams);
    const total = parseInt(countResult.rows[0].total);
    
    // Transform the results
    const cards = result.rows.map(row => ({
      id: row.id,
      name: row.name,
      set_name: row.set_name,
      set_code: row.set_code,
      card_number: row.card_number,
      rarity: row.rarity,
      game: row.game,
      mana_cost: row.mana_cost,
      cmc: row.cmc,
      card_type: row.card_type,
      colors: row.colors ? JSON.parse(row.colors) : [],
      oracle_text: row.oracle_text,
      power: row.power,
      toughness: row.toughness,
      image_url: row.image_url,
      stock_image_url: row.stock_image_url,
      current_price: row.current_price,
      market_price: row.market_price,
      verified: row.verified,
      createdAt: row.created_at,
      updatedAt: row.updated_at,
    }));
    
    console.log(`✅ Found ${cards.length} cards (total: ${total})`);
    
    return NextResponse.json({
      success: true,
      data: cards,
      pagination: {
        page,
        limit,
        total,
        totalPages: Math.ceil(total / limit),
        hasNext: page * limit < total,
        hasPrev: page > 1
      },
      search: {
        query,
        game,
        results: cards.length
      }
    });
    
  } catch (error) {
    console.error('❌ Error searching cards:', error);
    return NextResponse.json(
      { error: 'Failed to search cards', details: error.message },
      { status: 500 }
    );
  }
}

// POST /api/cards - Find or create card
export async function POST(request) {
  try {
    const token = request.headers.get('authorization')?.replace('Bearer ', '');
    const user = await verifyToken(token);
    
    if (!user) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }
    
    const { name, game, set_name, set_code, card_number } = await request.json();
    
    if (!name || !game) {
      return NextResponse.json({ error: 'Name and game are required' }, { status: 400 });
    }
    
    console.log(`🔍 Finding or creating card: "${name}" (${game})`);
    
    // Try to find existing card
    let result = await sql.query(`
      SELECT * FROM cards 
      WHERE name = $1 AND game = $2
      ORDER BY created_at DESC
      LIMIT 1
    `, [name, game]);
    
    if (result.rows.length > 0) {
      const card = result.rows[0];
      console.log(`✅ Found existing card: ${card.name}`);
      
      return NextResponse.json({
        success: true,
        data: {
          id: card.id,
          name: card.name,
          set_name: card.set_name,
          set_code: card.set_code,
          card_number: card.card_number,
          rarity: card.rarity,
          game: card.game,
          mana_cost: card.mana_cost,
          cmc: card.cmc,
          card_type: card.card_type,
          colors: card.colors ? JSON.parse(card.colors) : [],
          oracle_text: card.oracle_text,
          power: card.power,
          toughness: card.toughness,
          image_url: card.image_url,
          stock_image_url: card.stock_image_url,
          current_price: card.current_price,
          market_price: card.market_price,
          verified: card.verified,
          createdAt: card.created_at,
          updatedAt: card.updated_at,
        },
        message: 'Card found'
      });
    }
    
    // Create new card if not found
    console.log(`➕ Creating new card: ${name}`);
    
    result = await sql.query(`
      INSERT INTO cards (
        name, game, set_name, set_code, card_number, verified
      ) VALUES ($1, $2, $3, $4, $5, $6)
      RETURNING *
    `, [name, game, set_name || '', set_code || '', card_number || '', false]);
    
    const newCard = result.rows[0];
    
    return NextResponse.json({
      success: true,
      data: {
        id: newCard.id,
        name: newCard.name,
        set_name: newCard.set_name,
        set_code: newCard.set_code,
        card_number: newCard.card_number,
        rarity: newCard.rarity,
        game: newCard.game,
        mana_cost: newCard.mana_cost,
        cmc: newCard.cmc,
        card_type: newCard.card_type,
        colors: newCard.colors ? JSON.parse(newCard.colors) : [],
        oracle_text: newCard.oracle_text,
        power: newCard.power,
        toughness: newCard.toughness,
        image_url: newCard.image_url,
        stock_image_url: newCard.stock_image_url,
        current_price: newCard.current_price,
        market_price: newCard.market_price,
        verified: newCard.verified,
        createdAt: newCard.created_at,
        updatedAt: newCard.updated_at,
      },
      message: 'Card created'
    });
    
  } catch (error) {
    console.error('❌ Error finding/creating card:', error);
    return NextResponse.json(
      { error: 'Failed to find/create card', details: error.message },
      { status: 500 }
    );
  }
}