using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace DG.Tool
{
    public static class Utility
    {
        /// <summary>
        /// 获取随机数
        /// </summary>
        /// <param name="codeCount"></param>
        /// <returns></returns>
        public static string CreateRandomSatl(int codeCount)
        {
            string allChar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,w,x,y,z";
            string[] allCharArray = allChar.Split(',');
            string randomCode = "";
            int temp = -1;
            Random rand = new Random();
            for (int i = 0; i < codeCount; i++)
            {
                if (temp != -1)
                {
                    rand = new Random(i * temp * ((int)DateTime.Now.Ticks));
                }
                int t = rand.Next(50);
                if (temp == t)
                {
                    return CreateRandomSatl(codeCount);
                }
                temp = t;
                randomCode += allCharArray[t];
            }
            return randomCode;
        }
        public static string Sha512(string value)
        {
            SHA512 s512 = new SHA512Managed();
            byte[] bit_pwd = Encoding.Default.GetBytes(value);
            byte[] bit_shapsw = s512.ComputeHash(bit_pwd);
            string shapsw = Convert.ToBase64String(bit_shapsw);
            return shapsw;
        }
        public static int PasswordStrength(string password)
        {
            if (string.IsNullOrWhiteSpace(password)) return -1;
            //字符统计
            int iNum = 0, iLtt = 0, iSym = 0;
            foreach (char c in password)
            {
                if (c >= '0' && c <= '9') iNum++;
                else if (c >= 'a' && c <= 'z') iLtt++;
                else if (c >= 'A' && c <= 'Z') iLtt++;
                else iSym++;
            }
            if (password.Length < 6) return 3;   //长度小于6的密码
            if (iLtt == 0 && iSym == 0) return 1; //纯数字密码
            if (iNum == 0 && iSym == 0) return 2; //纯字母密码
            return 0; //正确
        }


        public static string GetSendMsgModel(string strJson, string modelParam)
        {
            string key = string.Empty;
            string values = string.Empty;
            strJson = strJson.Replace(",\"", "*\"").Replace("\":", "\"#").ToString();

            Regex regex = new Regex(@"(?<={)[^}]+(?=})");
            MatchCollection mc = regex.Matches(strJson);
            Dictionary<string, string> list = new Dictionary<string, string>();
            for (int i = 0; i < mc.Count; i++)
            {

                string strRow = mc[i].Value;
                string[] strRows = strRow.Split('*');
                foreach (string str in strRows)
                {
                    string[] strCell = str.Split('#');

                    key = strCell[0].Replace("\"", "");
                    values = strCell[1].Replace("\"", "");
                    list.Add(key, values);
                }
            }
            foreach (var item in list)
            {
                modelParam = modelParam.Replace("${" + item.Key + "}", item.Value);
            }

            return modelParam;
        }

        public static string DateEnToCn(string date)
        {
            string datename = "";
            date = date.ToLower();
            switch (date)
            {//--Monday 周一 Tuesday 周二 Wednesday 周三 Thursday 周四 Friday 周五 Saturday 周六 Sunday 周日
                case "monday": datename = "星期一"; break;
                case "tuesday": datename = "星期二"; break;
                case "wednesday": datename = "星期三"; break;
                case "thursday": datename = "星期四"; break;
                case "friday": datename = "星期五"; break;
                case "saturday": datename = "星期六"; break;
                case "sunday": datename = "星期日"; break;
            }
            return datename;
        }

        /// <summary>  
        /// 将c# DateTime时间格式转换为Unix时间戳格式  
        /// </summary>  
        /// <param name="time">时间</param>  
        /// <returns>long</returns>  
        public static long ConvertDateTimeToInt(System.DateTime time)
        {
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0, 0));
            long t = (time.Ticks - startTime.Ticks) / 10000;   //除10000调整为13位      
            return t;
        }
        /// <summary>        
        /// 时间戳转为C#格式时间        
        /// </summary>        
        /// <param name="timeStamp"></param>        
        /// <returns></returns>        
        public static DateTime ConvertStringToDateTime(string timeStamp)
        {
            DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            long lTime = long.Parse(timeStamp + "0000");
            TimeSpan toNow = new TimeSpan(lTime);
            return dtStart.Add(toNow);
        }

        /// <summary>  
        /// 获取文件的MD5码  
        /// </summary>  
        /// <param name="fileName">传入的文件名（含路径及后缀名）</param>  
        /// <returns></returns>  
        public static string GetMD5HashFromFile(string fileName)
        {
            try
            {
                FileStream file = new FileStream(fileName, System.IO.FileMode.Open);
                MD5 md5 = new MD5CryptoServiceProvider();
                byte[] retVal = md5.ComputeHash(file);
                file.Close();
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < retVal.Length; i++)
                {
                    sb.Append(retVal[i].ToString("x2"));
                }
                return sb.ToString();
            }
            catch (Exception ex)
            {
                throw new Exception("GetMD5HashFromFile() fail,error:" + ex.Message);
            }
        }

        #region 秒转换小时 SecondToHour
        /// <summary>
        /// 秒转换小时
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        public static string SecondToHour(double time)
        {
            string str = "";
            int hour = 0;
            int minute = 0;
            int second = 0;
            second = Convert.ToInt32(time);

            if (second > 60)
            {
                minute = second / 60;
                second = second % 60;
            }
            if (minute > 60)
            {
                hour = minute / 60;
                minute = minute % 60;
            }
            return (hour + "小时" + minute + "分钟"
                + second + "秒");
        }
        #endregion

        /// <summary>
        ///时间格式化
        /// </summary>
        /// <param name="dt">返回字符串的类型(默认4)
        ///例子： 2014/05/08 19:14:17
        ///type=1 2014/05/08 没有时分秒
        ///type=2 2014/05/08 19:14 没有秒
        ///type=3 14/05/08 19:14 没有年前两位和秒
        ///type=4 05/08 19:14   没有年和秒
        /// </param>
        /// <returns></returns>
        public static string ToUnityString(this DateTime dt, int type = 4)
        {
            if (dt == DateTime.MinValue)
                return "";
            string formartStr = string.Empty;
            switch (type)
            {
                case 1: formartStr = "yyyy/MM/dd"; break;
                case 2: formartStr = "yyyy/MM/dd HH:mm"; break;
                case 3: formartStr = "yy/MM/dd HH:mm"; break;
                case 4: formartStr = "MM/dd HH:mm"; break;
                case 5: formartStr = "yyyyMM"; break;
                case 6: formartStr = "yyyy-MM-dd"; break;
                case 7: formartStr = "yyyy-MM-dd HH:mm:ss"; break;
            }
            return dt.ToString(formartStr);

        }

        /// <summary>
        ///时间格式化
        /// </summary>
        /// <param name="dt">返回字符串的类型(默认4)
        ///例子： 2014/05/08 19:14:17
        ///type=1 2014/05/08 没有时分秒
        ///type=2 2014/05/08 19:14 没有秒
        ///type=3 14/05/08 19:14 没有年前两位和秒
        ///type=4 05/08 19:14   没有年和秒
        /// </param>
        /// <returns></returns>
        public static string ToUnityString(this DateTime? dt, int type = 4)
        {
            if (dt == null || dt.Value == DateTime.MinValue)
                return "";
            string formartStr = string.Empty;
            switch (type)
            {
                case 1: formartStr = "yyyy/MM/dd"; break;
                case 2: formartStr = "yyyy/MM/dd HH:mm"; break;
                case 3: formartStr = "yy/MM/dd HH:mm"; break;
                case 4: formartStr = "MM/dd HH:mm"; break;
                case 5: formartStr = "yyyyMM"; break;
                case 6: formartStr = "yyyy-MM-dd"; break;
            }
            return dt.Value.ToString(formartStr);
        }
    }
}