// 手机号验证
const isValidPhone = (phone) => {
  return /^1[3-9]\d{9}$/.test(phone);
};

// 邮箱验证
const isValidEmail = (email) => {
  return /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/.test(email);
};

// URL验证
const isValidUrl = (url) => {
  try {
    new URL(url);
    return true;
  } catch {
    return false;
  }
};

// 身份证号验证
const isValidIdCard = (idCard) => {
  return /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(idCard);
};

// 企业统一社会信用代码验证
const isValidCreditCode = (creditCode) => {
  return /^[0-9A-HJ-NPQRTUWXY]{2}\d{6}[0-9A-HJ-NPQRTUWXY]{10}$/.test(creditCode);
};

// 密码强度验证（至少包含数字和字母，长度8-20位）
const isValidPassword = (password) => {
  return /^(?=.*[A-Za-z])(?=.*\d)[A-Za-z\d]{8,20}$/.test(password);
};

module.exports = {
  isValidPhone,
  isValidEmail,
  isValidUrl,
  isValidIdCard,
  isValidCreditCode,
  isValidPassword
};