using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace CK.SCP.Common
{
    public class MyWebString
    {
        /// <summary>
        /// 取得从表单传递的内容
        /// </summary>
        /// <param name="content"></param>
        /// <returns></returns>
        public static string GetString(string content)
        {
            string ret = "";
            ret = content.Replace("'", "''");

            return ret;
        }

        public static string GetString(string content, int length)
        {
            string ret = "";
            ret = ret.Substring(0, length);
            ret = content.Replace("'", "''");

            return ret;
        }

        /// <summary>
        /// 取得从表单传递的数字
        /// </summary>
        /// <param name="content"></param>
        /// <returns></returns>
        public static int GetID(string content)
        {
            int ret = 0;
            if (content != "")
            {
                if (IsNumeric(content))
                {
                    ret = Convert.ToInt32(content);
                }
            }

            return ret;
        }


        /// <summary>
        /// 判断是否为正整数
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsNumeric(string str)
        {
            bool ret;
            if (str != "")
            {
                if (str != null && Regex.IsMatch(str, @"^\d+$"))
                    ret = true;
                else
                    ret = false;
            }
            else
            {
                ret = true;
            }

            return ret;
        }

        /// <summary>
        /// 判断是否是日期时间格式
        /// </summary>
        /// <param name="Date"></param>
        /// <returns></returns>
        public static bool IsDateTime(string Date)
        {
            try
            {
                Convert.ToDateTime(Date);

                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// 格式化时间/时间
        /// </summary>
        /// <param name="Type"></param>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static string FormatDateTime(int Type, string dt)
        {
            string result = "";
            if (dt == null || dt == "")
            {
                return result;
            }

            DateTime _dt = Convert.ToDateTime(dt);
            int Year = _dt.Year;
            int Month = _dt.Month;
            int Day = _dt.Day;

            string sYear = Year.ToString();
            string sMonth = Month.ToString();
            string sDay = Day.ToString();

            if (Month < 10)
                sMonth = "0" + Month.ToString();
            if (Day < 10)
                sDay = "0" + Day.ToString();

            switch (Type)
            {
                case 1: //06-03
                    result = sMonth + "-" + sDay;
                    break;
                case 2: //2010-10-01
                    result = sYear + "-" + sMonth + "-" + sDay;
                    break;
                case 3: //2010年10月01日
                    result = sYear + "年" + sMonth + "月" + sDay + "日";
                    break;
                case 4://20100310"
                    result = sYear + "" + sMonth + "" + sDay + "";
                    break;
            }

            return result;
        }

        public static string GetBatch()
        {
            string result = "";

            DateTime _dt = DateTime.Now;
            int Year = _dt.Year;
            int Month = _dt.Month;
            int Day = _dt.Day;

            string sYear = Year.ToString();
            string sMonth = Month.ToString();
            string sDay = Day.ToString();

            if (Month < 10)
                sMonth = "0" + Month.ToString();
            if (Day < 10)
                sDay = "0" + Day.ToString();

            sYear = sYear.Substring(2, 2);
            result = sYear + sMonth + sDay;

            return result;
        }

        /// <summary>
        /// 转换日期/时间
        /// </summary>
        /// <param name="datetime"></param>
        /// <returns></returns>
        public static DateTime ConvertTime(string datetime)
        {
            DateTime dt;

            datetime = datetime.Trim();
            if (datetime == "") throw new Exception("时间/日期格式不正确！");

            try
            {
                dt = Convert.ToDateTime(datetime);
            }
            catch
            {
                throw new Exception("[" + datetime + "]时间/日期格式不正确！");
            }

            return dt;
        }

        public static string Week(string datetime)
        {
            DateTime dt = Convert.ToDateTime(datetime);

            string[] weekdays = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
            string week = weekdays[Convert.ToInt32(dt.DayOfWeek)];

            return week;
        }


        /// <summary>
        /// 剪切指定长度的文本
        /// </summary>
        /// <param name="str"></param>
        /// <param name="len"></param>
        /// <returns></returns>
        public static string CutString(string str, int len)
        {
            if (str.Length <= len) return str;

            str = str.Substring(0, len) + "...";

            return str;
        }

        public static string CleanHtmlBr(string str)
        {
            str = str.Replace("<", "&lt;");
            str = str.Replace(">", "&gt;");
            str = str.Replace("\r\n", "<br>");
            str = str.Replace(" ", "&nbsp;");

            return str;
        }

        public static string AddHtmlBr(string str)
        {
            str = str.Replace("\r\n", "<br>");
            return str;
        }

        /// <summary>
        /// 根据日期、时间取得一个订单号
        /// </summary>
        /// <returns></returns>
        public static string GetOrderNumber()
        {
            string ret = "";

            //Random r = new Random(DateTime.Now.Millisecond);
            //int ex = r.Next(1000, 9999);

            //ret = DateTime.Now.ToString("yyMMddHHmmss") + "-" + ex;


            ret = Guid.NewGuid().ToString();


            return ret;
        }

        /// <summary>
        /// 在指定字串右边填充指定的字串
        /// </summary>
        /// <param name="o_str">要填充的原字串</param>
        /// <param name="p_str">填充的字符</param>
        /// <param name="len">要填充的长度</param>
        /// <returns></returns>
        public static string PadLeftString(string o_str, char p_str, int len)
        {
            string result = "";
            if (o_str.Length > len)
            {
                //result = o_str.Substring(0, len);
                result = o_str;
            }
            else
            {
                int slen = len - o_str.Length;
                result = o_str;
                while (slen > 0)
                {
                    result = p_str.ToString() + result;
                    slen--;
                }
            }

            return result;
        }
    }
}