using System;
using System.Text.RegularExpressions;

namespace System.Common
{
    public class ValidateString
    {
        #region 字符串验证

        #region 判断字符串是否为整型
        /**/
        /// <summary>
        /// 判断字符串是否为整型
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        #endregion
        public static bool IsInteger(string source)
        {
            if (string.IsNullOrEmpty(source))
            {
                return false;
            }

            if (Regex.IsMatch(source, "^((\\+)\\d)?\\d*$"))
            {
                return true;
            }
            return false;
        }

        public static bool IsZInteger(string source)
        {
            if (string.IsNullOrEmpty(source))
            {
                return false;
            }

            if (Regex.IsMatch(source, "^[1-9][0-9]*$"))
            {
                return true;
            }
            return false;
        }


        #region 判断字符串是否为整型
        /**/
        /// <summary>
        /// 判断字符串是否为整型
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        #endregion
        public static bool IsDecimal(string source)
        {
            return IsMoney(source);
        }

        #region Email 格式是否合法
        /**/
        /// <summary>
        /// Email 格式是否合法
        /// </summary>
        /// <param name="strEmail"></param>
        #endregion
        public static bool IsEmail(string strEmail)
        {
            return Regex.IsMatch(strEmail, @"^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$");
        }

        #region 判断一个字符串是否为网址
        /**/
        /// <summary>
        /// 判断一个字符串是否为网址
        /// </summary>
        /// <param name="_value"></param>
        /// <returns></returns>
        #endregion
        public static bool IsUrl(string _value)
        {
            var regex = new Regex(@"(http://)?([\w-]+\.)*[\w-]+(/[\w- ./?%&=]*)?", RegexOptions.IgnoreCase);
            return regex.Match(_value).Success;
        }

        #region 判断是否IP
        /**/
        /// <summary>
        /// 判断是否IP
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        #endregion
        public static bool IsIP(string source)
        {
            return Regex.IsMatch(source, @"^(((25[0-5]|2[0-4][0-9]|19[0-1]|19[3-9]|18[0-9]|17[0-1]|17[3-9]|1[0-6][0-9]|1[1-9]|[2-9][0-9]|[0-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9]))|(192\.(25[0-5]|2[0-4][0-9]|16[0-7]|169|1[0-5][0-9]|1[7-9][0-9]|[1-9][0-9]|[0-9]))|(172\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|1[0-5]|3[2-9]|[4-9][0-9]|[0-9])))\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])$");
        }


        #region 检查字符串是否为A-Z、0-9及下划线以内的字符

        /**/
        /// <summary>
        /// 检查字符串是否为A-Z、0-9及下划线以内的字符
        /// </summary>
        /// <param name="str">被检查的字符串</param>
        /// <returns>是否有特殊字符</returns>
        #endregion
        public static bool IsLetterOrNumber(string str)
        {
            bool b = Regex.IsMatch(str, "[a-zA-Z0-9_]");
            return b;
        }

        #region 检查字符串是否0-9以内的字符

        /**/
        /// <summary>
        /// 检查字符串是否为0-9以内的字符
        /// </summary>
        /// <param name="str">被检查的字符串</param>
        /// <returns>是否有特殊字符</returns>
        #endregion
        public static bool IsNumberStr(string str)
        {
            bool b = Regex.IsMatch(str, "^[0-9]*$");
            return b;
        }

        #region 返回字符串某个位置的一个字符的类型

        /**/

        /// <summary>
        /// 返回字符串某个位置的几个字符是否为a-zA-Z的字母
        /// </summary>
        /// <param name="str">被检查的字符串</param>
        /// <param name="Site">字符位置</param>
        /// <param name="num">长度</param>
        /// <returns>是否是字母</returns>

        #endregion
        public static bool GetStringType(string str, int Site, int num)
        {
            string a = str.Substring(Site, num);
            bool b = Regex.IsMatch(a, "[a-zA-Z]");
            return b;
        }


        #region 验输入字符串是否含有“/\<>:.?*|$]”特殊字符
        /**/
        /// <summary>
        /// 验输入字符串是否含有“/\:.?*|$]”特殊字符
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        #endregion
        public static bool IsSpecialChar(string source)
        {
            var r = new Regex(@"[/\<>:.?*|$]");
            return r.IsMatch(source);
        }


        #region 是否全为中文/日文/韩文字符
        /**/
        /// <summary>
        /// 是否全为中文/日文/韩文字符
        /// </summary>
        /// <param name="source">源字符串</param>
        /// <returns></returns>
        #endregion
        public static bool IsChineseChar(string source)
        {
            //中文/日文/韩文: [\u4E00-\u9FA5]
            //英文:[a-zA-Z]
            return Regex.IsMatch(source, @"^[\u4E00-\u9FA5]+$");
        }


        #region 是否包含双字节字符(允许有单字节字符)
        /**/
        /// <summary>
        /// 是否包含双字节字符(允许有单字节字符)
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        #endregion
        public static bool IsDoubleChar(string source)
        {
            return Regex.IsMatch(source, @"[^\x00-\xff]");
        }


        #region 是否为日期型字符串
        /**/
        /// <summary>
        /// 是否为日期型字符串
        /// </summary>
        /// <param name="source">日期字符串(2005-6-30)</param>
        /// <returns></returns>
        #endregion
        public static bool IsDate(string source)
        {
            return Regex.IsMatch(source, @"^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-))$");
        }


        #region 是否为时间型字符串
        /**/
        /// <summary>
        /// 是否为时间型字符串
        /// </summary>
        /// <param name="source">时间字符串(15:00:00)</param>
        /// <returns></returns>
        #endregion
        public static bool IsTime(string source)
        {
            return Regex.IsMatch(source, @"^((20|21|22|23|[0-1]?\d):[0-5]?\d:[0-5]?\d)$");
        }


        #region 是否为日期+时间型字符串
        /**/
        /// <summary>
        /// 是否为日期+时间型字符串
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        #endregion
        public static bool IsDateTime(string source)
        {
            return Regex.IsMatch(source, @"^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-)) ((20|21|22|23|[0-1]?\d):[0-5]?\d:[0-5]?\d)$");
        }


        #region 是否为钱币型数据
        /**/
        /// <summary>
        /// 是否为钱币型数据
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        #endregion
        public static bool IsMoney(string source)
        {
            if (source == "")
            {
                return false;
            }
            return Regex.IsMatch(source, @"^(([1-9]\d*)|0)(\.\d{1,2})?$");
        }

        #region 判断是否为空字符串
        /**/
        /// <summary>
        /// 是否为空字符串
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        #endregion
        public static bool IsNull(object obj)
        {
            bool rn = obj == null || Convert.ToString(obj).Length <= 0 || Convert.IsDBNull(obj);

            return rn;
        }

        #endregion
    }
}