/**
 * 测试生成的卡号是否有效
 */
import pkg from './src/tools/card/CardGeneratorTool.js';
const { CardGeneratorTool } = pkg;

// Luhn算法验证
function validateLuhn(cardNumber) {
  let sum = 0;
  let isEven = false;
  
  for (let i = cardNumber.length - 1; i >= 0; i--) {
    let digit = parseInt(cardNumber[i]);
    
    if (isEven) {
      digit *= 2;
      if (digit > 9) digit -= 9;
    }
    
    sum += digit;
    isEven = !isEven;
  }
  
  return sum % 10 === 0;
}

async function test() {
  console.log('生成20张卡，验证有效性...\n');
  
  const cardGen = new CardGeneratorTool();
  await cardGen.initialize({});
  
  const cards = await cardGen.generateBatch(20, 'unionpay');
  
  let luhnPass = 0;
  let luhnFail = 0;
  
  console.log('=== 卡号验证 ===\n');
  cards.forEach((card, i) => {
    const isValid = validateLuhn(card.number);
    const status = isValid ? '✅' : '❌';
    
    if (isValid) luhnPass++;
    else luhnFail++;
    
    console.log(`${i + 1}. ${status} ${card.number}`);
    console.log(`   有效期: ${card.month}/${card.year}`);
    console.log(`   CVV: ${card.cvv}`);
    console.log(`   发卡行: ${card.issuer} (${card.country})`);
    console.log();
  });
  
  console.log('=== 验证结果 ===');
  console.log(`Luhn校验通过: ${luhnPass}/20`);
  console.log(`Luhn校验失败: ${luhnFail}/20`);
  
  // 验证有效期范围
  console.log('\n=== 有效期检查 ===');
  const months = cards.map(c => parseInt(c.month));
  const years = cards.map(c => parseInt(c.year));
  
  const validMonths = months.filter(m => m >= 1 && m <= 12).length;
  const validYears = years.filter(y => y >= 26 && y <= 30).length;
  
  console.log(`月份有效: ${validMonths}/20 (范围: 01-12)`);
  console.log(`年份有效: ${validYears}/20 (范围: 26-30)`);
  
  // 验证CVV长度
  console.log('\n=== CVV检查 ===');
  const validCVV = cards.filter(c => c.cvv.length === 3).length;
  console.log(`CVV长度正确: ${validCVV}/20 (应为3位)`);
  
  // 显示有效期和CVV的分布
  console.log('\n=== 有效期分布 ===');
  const expiryDist = {};
  cards.forEach(c => {
    const key = `${c.month}/${c.year}`;
    expiryDist[key] = (expiryDist[key] || 0) + 1;
  });
  Object.entries(expiryDist)
    .sort((a, b) => b[1] - a[1])
    .forEach(([expiry, count]) => {
      console.log(`  ${expiry}: ${count}次`);
    });
}

test().catch(err => {
  console.error('错误:', err.message);
  console.error(err.stack);
});