/**
 * 测试卡号生成规律
 */
import pkg from './src/tools/card/CardGeneratorTool.js';
const { CardGeneratorTool } = pkg;

async function test() {
  console.log('开始生成1000张卡...\n');
  
  const cardGen = new CardGeneratorTool();
  await cardGen.initialize({});
  
  const cards = await cardGen.generateBatch(1000, 'unionpay');
  
  // 统计后4位的分布
  const pos1 = {};
  const pos2 = {};
  const pos3 = {};
  
  cards.forEach(card => {
    const last4 = card.number.slice(-4);
    const digits = last4.slice(0, 3);
    
    pos1[digits[0]] = (pos1[digits[0]] || 0) + 1;
    pos2[digits[1]] = (pos2[digits[1]] || 0) + 1;
    pos3[digits[2]] = (pos3[digits[2]] || 0) + 1;
  });
  
  console.log('=== 生成的1000张卡的数字分布 ===\n');
  
  console.log('位置1（千位）频率:');
  for (let i = 0; i <= 9; i++) {
    const count = pos1[i] || 0;
    const percent = (count / 1000 * 100).toFixed(1);
    const expected = [14, 9, 7, 8, 10, 2, 4, 7, 7, 2][i];
    const expectedPercent = (expected / 70 * 100).toFixed(1);
    console.log(`  ${i}: ${count}次 (${percent}%) [期望: ${expectedPercent}%]`);
  }
  
  console.log('\n位置2（百位）频率:');
  for (let i = 0; i <= 9; i++) {
    const count = pos2[i] || 0;
    const percent = (count / 1000 * 100).toFixed(1);
    const expected = [10, 7, 10, 2, 5, 8, 2, 11, 8, 7][i];
    const expectedPercent = (expected / 70 * 100).toFixed(1);
    console.log(`  ${i}: ${count}次 (${percent}%) [期望: ${expectedPercent}%]`);
  }
  
  console.log('\n位置3（十位）频率:');
  for (let i = 0; i <= 9; i++) {
    const count = pos3[i] || 0;
    const percent = (count / 1000 * 100).toFixed(1);
    const expected = [10, 2, 4, 11, 8, 9, 6, 6, 7, 7][i];
    const expectedPercent = (expected / 70 * 100).toFixed(1);
    console.log(`  ${i}: ${count}次 (${percent}%) [期望: ${expectedPercent}%]`);
  }
  
  console.log('\n=== 前20张生成的卡号 ===\n');
  cards.slice(0, 20).forEach((card, i) => {
    const last4 = card.number.slice(-4);
    console.log(`${i + 1}. ${card.number} (后4位: ${last4})`);
  });
  
  const uniqueNumbers = new Set(cards.map(c => c.number));
  console.log(`\n=== 去重检查 ===`);
  console.log(`生成: 1000张`);
  console.log(`唯一: ${uniqueNumbers.size}张`);
  console.log(`重复: ${1000 - uniqueNumbers.size}张`);
}

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