#!/usr/bin/env node

/**
 * Card Database Population Script
 * 
 * This script fetches cards from external APIs and adds them to your local database.
 * Run this to populate your database with popular cards from various games.
 */

const fetch = require('node-fetch');

// Configuration
const API_BASE_URL = process.env.REACT_APP_API_URL || 'http://localhost:8000';
const AUTH_TOKEN = process.env.TCG_VAULT_TOKEN; // Set this in your environment

// Popular cards to fetch (examples)
const POPULAR_CARDS = {
  MTG: [
    'Lightning Bolt',
    'Black Lotus',
    'Counterspell',
    'Dark Ritual',
    'Brainstorm',
    'Force of Will',
    'Wasteland',
    'Tarmogoyf',
    'Snapcaster Mage',
    'Jace, the Mind Sculptor'
  ],
  POKEMON: [
    'Pikachu',
    'Charizard',
    'Blastoise',
    'Venusaur',
    'Mewtwo',
    'Lugia',
    'Ho-Oh',
    'Rayquaza',
    'Garchomp',
    'Lucario'
  ],
  YUGIOH: [
    'Blue-Eyes White Dragon',
    'Dark Magician',
    'Red-Eyes Black Dragon',
    'Exodia the Forbidden One',
    'Slifer the Sky Dragon',
    'Obelisk the Tormentor',
    'The Winged Dragon of Ra',
    'Elemental HERO Neos',
    'Stardust Dragon',
    'Number 39: Utopia'
  ]
};

// Rate limiting utility
class RateLimiter {
  constructor(maxRequests, timeWindow) {
    this.maxRequests = maxRequests;
    this.timeWindow = timeWindow;
    this.requests = [];
  }

  async waitForSlot() {
    const now = Date.now();
    this.requests = this.requests.filter(time => now - time < this.timeWindow);
    
    if (this.requests.length >= this.maxRequests) {
      const oldestRequest = this.requests[0];
      const waitTime = this.timeWindow - (now - oldestRequest);
      await new Promise(resolve => setTimeout(resolve, waitTime));
    }
    
    this.requests.push(now);
  }
}

const scryfallLimiter = new RateLimiter(10, 1000); // 10 requests per second
const pokemonLimiter = new RateLimiter(5, 1000); // 5 requests per second

// API Services
const mtgService = {
  async getCardByName(name) {
    await scryfallLimiter.waitForSlot();
    
    try {
      const response = await fetch(
        `https://api.scryfall.com/cards/named?fuzzy=${encodeURIComponent(name)}`
      );
      
      if (!response.ok) {
        console.log(`❌ MTG card not found: ${name}`);
        return null;
      }
      
      const card = await response.json();
      
      return {
        name: card.name,
        game: 'MTG',
        set_name: card.set_name,
        set_code: card.set,
        card_number: card.collector_number,
        rarity: card.rarity,
        mana_cost: card.mana_cost,
        cmc: card.cmc,
        card_type: card.type_line,
        colors: card.colors,
        oracle_text: card.oracle_text,
        power: card.power,
        toughness: card.toughness,
        image_url: card.image_uris?.normal,
        stock_image_url: card.image_uris?.normal,
        current_price: card.prices?.usd ? parseFloat(card.prices.usd) : null,
        market_price: card.prices?.usd_foil ? parseFloat(card.prices.usd_foil) : null,
      };
    } catch (error) {
      console.error(`❌ Error fetching MTG card ${name}:`, error.message);
      return null;
    }
  }
};

const pokemonService = {
  async getCardByName(name) {
    await pokemonLimiter.waitForSlot();
    
    try {
      const response = await fetch(
        `https://api.pokemontcg.io/v2/cards?q=name:${encodeURIComponent(name)}&pageSize=1`
      );
      
      if (!response.ok) {
        console.log(`❌ Pokémon card not found: ${name}`);
        return null;
      }
      
      const data = await response.json();
      
      if (data.data.length === 0) {
        console.log(`❌ Pokémon card not found: ${name}`);
        return null;
      }
      
      const card = data.data[0];
      
      return {
        name: card.name,
        game: 'POKEMON',
        set_name: card.set.name,
        set_code: card.set.id,
        card_number: card.number,
        rarity: card.rarity,
        mana_cost: card.convertedRetreatCost?.toString(),
        cmc: card.convertedRetreatCost,
        card_type: card.supertype,
        colors: card.types || [],
        oracle_text: card.attacks?.map(attack => `${attack.name}: ${attack.text}`).join('\n'),
        power: card.hp,
        toughness: null,
        image_url: card.images.small,
        stock_image_url: card.images.large,
        current_price: card.cardmarket?.prices?.averageSellPrice || null,
        market_price: card.cardmarket?.prices?.lowPrice || null,
      };
    } catch (error) {
      console.error(`❌ Error fetching Pokémon card ${name}:`, error.message);
      return null;
    }
  }
};

const yugiohService = {
  async getCardByName(name) {
    try {
      const response = await fetch(
        `https://db.ygoprodeck.com/api/v7/cardinfo.php?fname=${encodeURIComponent(name)}`
      );
      
      if (!response.ok) {
        console.log(`❌ Yu-Gi-Oh! card not found: ${name}`);
        return null;
      }
      
      const data = await response.json();
      
      if (data.data.length === 0) {
        console.log(`❌ Yu-Gi-Oh! card not found: ${name}`);
        return null;
      }
      
      const card = data.data[0];
      
      return {
        name: card.name,
        game: 'YUGIOH',
        set_name: card.set_name,
        set_code: card.set_code,
        card_number: card.num,
        rarity: card.rarity,
        mana_cost: card.level?.toString(),
        cmc: card.level,
        card_type: card.type,
        colors: [card.attribute],
        oracle_text: card.desc,
        power: card.atk?.toString(),
        toughness: card.def?.toString(),
        image_url: card.card_images?.[0]?.image_url,
        stock_image_url: card.card_images?.[0]?.image_url_small,
        current_price: card.card_prices?.[0]?.amazon_price ? parseFloat(card.card_prices[0].amazon_price) : null,
        market_price: card.card_prices?.[0]?.cardmarket_price ? parseFloat(card.card_prices[0].cardmarket_price) : null,
      };
    } catch (error) {
      console.error(`❌ Error fetching Yu-Gi-Oh! card ${name}:`, error.message);
      return null;
    }
  }
};

// Database API
const databaseAPI = {
  async addCard(cardData) {
    try {
      const response = await fetch(`${API_BASE_URL}/api/cards/find-or-create`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          ...(AUTH_TOKEN && { 'Authorization': `Bearer ${AUTH_TOKEN}` }),
        },
        body: JSON.stringify({
          name: cardData.name,
          game: cardData.game,
          setName: cardData.set_name,
          setCode: cardData.set_code,
          rarity: cardData.rarity,
          cardType: cardData.card_type,
          manaCost: cardData.mana_cost,
          imageUrl: cardData.stock_image_url,
        }),
      });

      if (!response.ok) {
        throw new Error(`HTTP ${response.status}: ${response.statusText}`);
      }

      const result = await response.json();
      return result;
    } catch (error) {
      console.error(`❌ Error adding card to database:`, error.message);
      return null;
    }
  }
};

// Main execution
async function populateDatabase() {
  console.log('🚀 Starting card database population...\n');

  let totalProcessed = 0;
  let totalAdded = 0;
  let totalErrors = 0;

  for (const [game, cards] of Object.entries(POPULAR_CARDS)) {
    console.log(`📦 Processing ${game} cards...`);
    
    for (const cardName of cards) {
      totalProcessed++;
      console.log(`  🔍 Fetching: ${cardName}`);
      
      let cardData = null;
      
      // Fetch card data based on game
      switch (game) {
        case 'MTG':
          cardData = await mtgService.getCardByName(cardName);
          break;
        case 'POKEMON':
          cardData = await pokemonService.getCardByName(cardName);
          break;
        case 'YUGIOH':
          cardData = await yugiohService.getCardByName(cardName);
          break;
      }
      
      if (cardData) {
        console.log(`  ✅ Found: ${cardData.name} (${cardData.set_name})`);
        
        // Add to database
        const result = await databaseAPI.addCard(cardData);
        
        if (result && result.success) {
          console.log(`  💾 Added to database: ${cardData.name}`);
          totalAdded++;
        } else {
          console.log(`  ⚠️  Already exists or failed to add: ${cardData.name}`);
          totalErrors++;
        }
      } else {
        console.log(`  ❌ Not found: ${cardName}`);
        totalErrors++;
      }
      
      // Small delay between requests
      await new Promise(resolve => setTimeout(resolve, 100));
    }
    
    console.log('');
  }

  console.log('📊 Population Summary:');
  console.log(`  Total processed: ${totalProcessed}`);
  console.log(`  Successfully added: ${totalAdded}`);
  console.log(`  Errors/not found: ${totalErrors}`);
  console.log('\n✨ Database population complete!');
}

// Run the script
if (require.main === module) {
  populateDatabase().catch(console.error);
}

module.exports = {
  populateDatabase,
  mtgService,
  pokemonService,
  yugiohService,
  databaseAPI
};