const { formatNumber } = require('./date');

// 格式化金额
const formatAmount = (amount, decimals = 2) => {
  if (!amount && amount !== 0) return '--';
  return Number(amount).toFixed(decimals).replace(/\B(?=(\d{3})+(?!\d))/g, ',');
};

// 格式化数量（支持万、亿单位）
const formatQuantity = (num) => {
  if (!num && num !== 0) return '--';
  if (num >= 100000000) {
    return (num / 100000000).toFixed(2) + '亿';
  }
  if (num >= 10000) {
    return (num / 10000).toFixed(2) + '万';
  }
  return formatNumber(num);
};

// 格式化文件大小
const formatFileSize = (bytes) => {
  if (!bytes && bytes !== 0) return '--';
  const units = ['B', 'KB', 'MB', 'GB', 'TB'];
  let num = bytes;
  let index = 0;
  while (num >= 1024 && index < units.length - 1) {
    num /= 1024;
    index++;
  }
  return num.toFixed(2) + units[index];
};

// 格式化手机号
const formatPhone = (phone) => {
  if (!phone) return '';
  return phone.replace(/(\d{3})\d{4}(\d{4})/, '$1****$2');
};

// 格式化身份证号
const formatIdCard = (idCard) => {
  if (!idCard) return '';
  return idCard.replace(/(\d{4})\d{10}(\d{4})/, '$1**********$2');
};

// 格式化银行卡号
const formatBankCard = (cardNo) => {
  if (!cardNo) return '';
  return cardNo.replace(/(\d{4})\d+(\d{4})/, '$1 **** **** $2');
};

module.exports = {
  formatAmount,
  formatQuantity,
  formatFileSize,
  formatPhone,
  formatIdCard,
  formatBankCard
};