const systemConfig = JSON.parse(localStorage.getItem('systemConfig'));
/**
 * @param {string} path
 * @returns {Boolean}
 */
export function isExternal(path) {
  return /^(https?:|mailto:|tel:)/.test(path)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validUsername(str) {
  const valid_map = ['admin', 'editor']
  return valid_map.indexOf(str.trim()) >= 0
}

/**
 * @param {string} url
 * @returns {Boolean}
 */
export function validURL(url) {
  const reg = /^(https?|ftp):\/\/([a-zA-Z0-9.-]+(:[a-zA-Z0-9.&%$-]+)*@)*((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}|([a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(:[0-9]+)*(\/($|[a-zA-Z0-9.,?'\\+&%$#=~_-]+))*$/
  return reg.test(url)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validLowerCase(str) {
  const reg = /^[a-z]+$/
  return reg.test(str)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validUpperCase(str) {
  const reg = /^[A-Z]+$/
  return reg.test(str)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validAlphabets(str) {
  const reg = /^[A-Za-z]+$/
  return reg.test(str)
}

/**
 * @param {string} email
 * @returns {Boolean}
 */
export function validEmail(email) {
  const reg = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
  return reg.test(email)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function isString(str) {
  return typeof str === 'string' || str instanceof String
}

/**
 * @param {Array} arg
 * @returns {Boolean}
 */
export function isArray(arg) {
  if (typeof Array.isArray === 'undefined') {
    return Object.prototype.toString.call(arg) === '[object Array]'
  }
  return Array.isArray(arg)
}

/**
 * 密码的正则表达式 最少8个字符，最多20个字符，至少一个字母，一个数字和一个特殊字符：
 * @param {string} password
 * @returns {Boolean}
 */
export function validPwd(value) {
  const reg = /^(?=.*[A-Za-z])(?=.*\d)(?=.*[@$!%*#?&])[A-Za-z\d@$!%*#?&]{8,20}$/
  return reg.test(value)
}

export function validateNewPassword(rule, value, callback) {
  // 使用配置文件中的策略进行验证

  // 1. 检查密码长度
  if (value.length < systemConfig.passwordConfig.minLength || value.length > systemConfig.passwordConfig.maxLength) {
    callback(new Error('密码长度应为' + systemConfig.passwordConfig.minLength + '至' + systemConfig.passwordConfig.maxLength + '位！'))
    return
  }

  // 2. 检查密码复杂度
  const hasUpperCase = /[A-Z]/.test(value)
  const hasLowerCase = /[a-z]/.test(value)
  const hasDigit = /\d/.test(value)
  const hasSpecialChar = /[!@#$%^&*(),.?":{}|<>]/.test(value)

  if (systemConfig.passwordConfig.requireUpperCase && !hasUpperCase) {
    callback(new Error('密码必须包含大写字母！'))
    return
  }
  if (systemConfig.passwordConfig.requireLowerCase && !hasLowerCase) {
    callback(new Error('密码必须包含小写字母！'))
    return
  }
  if (systemConfig.passwordConfig.requireDigit && !hasDigit) {
    callback(new Error('密码必须包含数字！'))
    return
  }
  if (systemConfig.passwordConfig.requireSpecialChar && !hasSpecialChar) {
    callback(new Error('密码必须包含特殊字符！'))
    return
  }
  // 3. 检查是否包含弱密码
  for (const weakPwd of systemConfig.passwordConfig.weakPasswords) {
    // 将密码和弱密码都转换为小写进行比较
    if (value.toLowerCase().includes(weakPwd.toLowerCase())) {
      callback(new Error(`密码包含常见的弱密码片段: ${weakPwd}`))
      return
    }
  }
  // 4. 检查是否包含超过规定数量的连续字符
  if (systemConfig.passwordConfig.restrictConsecutiveChars && containsConsecutiveCharacters(value, systemConfig.passwordConfig.maxConsecutiveChars)) {
    callback(new Error(`密码不能包含超过${systemConfig.passwordConfig.maxConsecutiveChars}位连续字符！`))
    return
  }
  callback() // 验证成功
}

/**
 * 检查密码中是否包含超过 n 个连续相同字符、连续递增/递减的数字或字母（不区分大小写）
 */
function containsConsecutiveCharacters(password, n) {
  // 检查连续相同字符
  n = n + 1; // 允许最多 n 个连续字符
  for (let i = 0; i <= password.length - n; i++) {
    let consecutiveSameChar = true;
    for (let j = 1; j < n; j++) {
      if (password[i + j] !== password[i]) {
        consecutiveSameChar = false;
        break;
      }
    }
    if (consecutiveSameChar) {
      return true; // 包含超过 n 个连续相同字符
    }
  }

  // 检查连续递增或递减的数字
  for (let i = 0; i <= password.length - n; i++) {
    let consecutiveIncreasing = true;
    let consecutiveDecreasing = true;
    for (let j = 1; j < n; j++) {
      const currentChar = password[i];
      const nextChar = password[i + j];

      // 检查数字递增或递减
      if (/\d/.test(currentChar) && /\d/.test(nextChar)) {
        if (nextChar.charCodeAt(0) !== currentChar.charCodeAt(0) + j) {
          consecutiveIncreasing = false;
        }
        if (nextChar.charCodeAt(0) !== currentChar.charCodeAt(0) - j) {
          consecutiveDecreasing = false;
        }
      } else {
        consecutiveIncreasing = false;
        consecutiveDecreasing = false;
        break;
      }
    }
    if (consecutiveIncreasing || consecutiveDecreasing) {
      return true; // 包含超过 n 个递增或递减的连续数字
    }
  }

  // 检查连续递增或递减的字母（不区分大小写）
  for (let i = 0; i <= password.length - n; i++) {
    let consecutiveIncreasing = true;
    let consecutiveDecreasing = true;
    for (let j = 1; j < n; j++) {
      const currentChar = password[i].toLowerCase(); // 转为小写
      const nextChar = password[i + j].toLowerCase(); // 转为小写

      // 检查字母递增或递减
      if (/[a-zA-Z]/.test(currentChar) && /[a-zA-Z]/.test(nextChar)) {
        if (nextChar.charCodeAt(0) !== currentChar.charCodeAt(0) + j) {
          consecutiveIncreasing = false;
        }
        if (nextChar.charCodeAt(0) !== currentChar.charCodeAt(0) - j) {
          consecutiveDecreasing = false;
        }
      } else {
        consecutiveIncreasing = false;
        consecutiveDecreasing = false;
        break;
      }
    }
    if (consecutiveIncreasing || consecutiveDecreasing) {
      return true; // 包含超过 n 个递增或递减的连续字母
    }
  }

  // 不包含连续相同字符、数字或字母序列
  return false;
}


