using System;
using System.Text;
using System.Text.RegularExpressions;
using System.Data;
using EasyFuncLib;

namespace Zhaizj.Framework
{
    /// <summary>
    /// 基本数据类型判断
    /// </summary>
    public class Utils
    {
        /// <summary>
        /// 验证是否为正整数
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsInt(string Expression)
        {
            if (Expression != null)
            {
                return Regex.IsMatch(Expression, @"^[0-9]+$");
            }
            return false;
        }

        /// <summary>
        /// 是否为浮点数字
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsDouble(string Expression)
        {
            if (Expression != null)
            {
                return Regex.IsMatch(Expression, @"^\-?[0-9]+(\.[0-9]*)?$");
            }
            return false;
        }

        /// <summary>
        /// 是否为中文字符
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsCh(string str)
        {
            return Regex.IsMatch(str, "^[\u4e00-\u9fa5]+$"); 
        }

        /// <summary>
        /// 是否为数字字母和_
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsNormal(string Expression)
        {
            if (Expression != null)
            {
                return Regex.IsMatch(Expression, @"^[0-9a-zA-Z_]+$");
            }
            return false;
        }

        /// <summary>
        /// 是否为数字字母汉字和_
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsNormalCh(string Expression)
        {
            if (Expression != null)
            {
                return Regex.IsMatch(Expression, @"^[0-9a-zA-Z\u4e00-\u9fa5_]+$");
            }
            return false;
        }

        /// <summary>
        /// 是否为电话号码(未强制判断)
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsPhone(string Expression)
        {
            if (Expression == "") return true;
            if (Expression != null)
            {
                return Regex.IsMatch(Expression, @"^[0-9\-.]+$");
            }
            return false;
        }

        /// <summary>
        /// 判断Email地址
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsEmail(string Expression)
        {
            if (Expression != null)
            {
                return Regex.IsMatch(Expression, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
            }
            return false;
        }

        /// <summary>
        /// 判断手机号码
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsMoblie(string Expression)
        {
            string regu = "^[1][3,5,8][0-9]{9}$";
            if (!Regex.Match(Expression, regu, RegexOptions.Compiled).Success)
            {
                return false;
            }
            else 
            {
                return true;
            }
        }

        /// <summary>
        /// 产生随机字符串
        /// </summary>
        /// <param name="length">要产生随机字符串的长度</param>
        /// <returns></returns>
        public static string RandomString(int length) 
        {
            Random ran = new Random();
            string str = String.Empty;
            Char code;
            int num;
            for (int i = 0; i < length; i++) 
            {
                num = ran.Next();
                if (num % 2 == 0)
                {
                    code = (char)('0' + (char)(num % 10));
                }
                else 
                {
                    code = (char)('A' + (char)(num % 10));
                }
                str += code;
            }

            return str;
        }
        /// <summary>
        /// 给Table加上编号
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="name"></param>
        /// <returns></returns>
        public static DataTable AddNumberTable(DataTable dt,String name)
        {
            dt.Columns.Add(name);
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                dt.Rows[i][name] = (i + 1).ToString();
            }
            return dt;
        }

        /// <summary>
        /// 中文转换为简拼
        /// </summary>
        /// <param name="chinese"></param>
        /// <returns></returns>
        public static string GetJp(string chinese) 
        {
            return Chinese2PinYin.GetFirstPinYin(chinese);
        }
    }
}