/**
 * Card Generator Configuration
 * 卡类型配置
 */

const CARD_TYPES = {
  unionpay: {
    name: '中国银联 (UnionPay)',
    // 固定前缀（用户提供的成功案例都是这个前缀）
    prefix: '622836754', // 固定BIN前缀
    length: 16,
    cvvLength: 3,
    useLuhn: true,
    
    // 成功案例的后7位模式（43个真实案例，统计分析显示接近均匀随机分布）
    successfulPatterns: [
      '1130577', '0744030', '9888788', '9131205', '1450744',
      '7238010', '7300364', '0814288', '6042579', '6361755',
      '2443235', '3564435', '8400627', '4445204', '2653734',
      '9976732', '0810302', '0707201', '5237808', '4322734',
      '1880148', '9130520', '7863197', '1210049', '9031561',
      '2464926', '2487000', '5452860', '8491592', '5022853',
      '5864858', '4742832', '0023658', '7416988', '7093159',
      '9198576', '8160064', '6223252', '4873785', '1299976',
      '2940032', '6998937', '5800241'
    ],
    
    // 生成策略配置
    generation: {
      mutationRate: 0.5,      // 50% 使用变异策略
      randomRate: 0.5,        // 50% 使用纯随机
      mutationDigits: [1, 2]  // 变异时改变1-2个数字
    }
  },
  visa: {
    name: 'Visa',
    prefix: '4',
    length: 16,
    cvvLength: 3,
    useLuhn: true
  },
  mastercard: {
    name: 'MasterCard',
    prefix: '5',
    length: 16,
    cvvLength: 3,
    useLuhn: true
  },
  amex: {
    name: 'American Express',
    prefix: '34',
    length: 15,
    cvvLength: 4,
    useLuhn: true
  },
  discover: {
    name: 'Discover',
    prefix: '6011',
    length: 16,
    cvvLength: 3,
    useLuhn: true
  }
};

/**
 * 有效期配置
 */
const EXPIRY_CONFIG = {
  minYear: 26,  // 2026
  maxYear: 30,  // 2030
  minMonth: 1,
  maxMonth: 12
};

/**
 * 输出格式配置
 */
const OUTPUT_FORMATS = {
  pipe: {
    name: 'Pipe分隔 (|)',
    formatter: (card) => `${card.number}|${card.month}|${card.year}|${card.cvv}`
  },
  json: {
    name: 'JSON格式',
    formatter: (card) => JSON.stringify(card, null, 2)
  },
  csv: {
    name: 'CSV格式',
    formatter: (card) => `${card.number},${card.month},${card.year},${card.cvv}`
  },
  pretty: {
    name: '美化格式',
    formatter: (card) => `
Card Number: ${card.number}
Expiry Date: ${card.month}/${card.year}
CVV: ${card.cvv}
Type: ${card.type}
    `.trim()
  }
};

module.exports = {
  CARD_TYPES,
  EXPIRY_CONFIG,
  OUTPUT_FORMATS
};