using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using ConsoleHttp.Model;

namespace MqttMsgServer.Tools
{
    public static class StringHelper
    {
        /// <summary>
        /// MD5字符串加密
        /// </summary>
        /// <param name="txt"></param>
        /// <returns>加密后字符串</returns>
        public static string GenerateMD5(string txt)
        {
            using (MD5 mi = MD5.Create())
            {
                byte[] buffer = Encoding.Default.GetBytes(txt);
                //开始加密
                byte[] newBuffer = mi.ComputeHash(buffer);
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < newBuffer.Length; i++)
                {
                    sb.Append(newBuffer[i].ToString("x2"));
                }
                return sb.ToString();
            }
        }

        /// <summary>
        /// MD5流加密
        /// </summary>
        /// <param name="inputStream"></param>
        /// <returns></returns>
        public static string GenerateMD5(Stream inputStream)
        {
            using (MD5 mi = MD5.Create())
            {
                //开始加密
                byte[] newBuffer = mi.ComputeHash(inputStream);
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < newBuffer.Length; i++)
                {
                    sb.Append(newBuffer[i].ToString("x2"));
                }
                return sb.ToString();
            }
        }

        public static ResponseResult CheckError(string errorMsg, int returnCode = 9001)
        {
            ResponseResult result = new ResponseResult {IsSuccess = false, ErrorMessage = errorMsg, ReturnCode = 9001};
            return result;
        }
        /// <summary>
        /// Base64 编码
        /// </summary>
        /// <param name="encode">编码方式</param>
        /// <param name="source">要编码的字符串</param>
        /// <returns>返回编码后的字符串</returns>
        public static string EncodeBase64(this string source, Encoding encode = null)
        {
            string result;
            try
            {
                encode = encode ?? Encoding.UTF8;
                byte[] bytes = encode.GetBytes(source);
                result = Convert.ToBase64String(bytes);
            }
            catch
            {
                result = source;
            }
            return result;
        }


        /// <summary>
        /// Base64 解码
        /// </summary>
        /// <param name="encode">解码方式</param>
        /// <param name="source">要解码的字符串</param>
        /// <returns>返回解码后的字符串</returns>
        public static string DecodeBase64(this string source, Encoding encode = null)
        {
            string result;
            try
            {
                byte[] bytes = Convert.FromBase64String(source);
                encode = encode ?? Encoding.UTF8;
                result = encode.GetString(bytes);
            }
            catch
            {
                result = source;
            }
            return result;
        }
        public static int ToInt(this string s, int defaultValue = 0)
        {
            int i;
            return int.TryParse(s, out i) ? i : defaultValue;
        }
        public static  List<T> ToList<T>(DataTable dt) where T : class, new()
        {
            Type t = typeof(T);
            PropertyInfo[] propertyInfo = t.GetProperties();
            List<T> list = new List<T>();

            foreach (DataRow item in dt.Rows)
            {
                T obj = new T();
                foreach (PropertyInfo s in propertyInfo)
                {
                    var typeName = s.Name;
                    if (dt.Columns.Contains(typeName))
                    {
                        if (!s.CanWrite) continue;

                        object value = item[typeName];
                        if (value == DBNull.Value) continue;

                        s.SetValue(obj, s.PropertyType == typeof(string) ? value.ToString() : value, null);
                    }
                }
                list.Add(obj);
            }
            return list;
        }
    }
    public static class ExtendEnum
    {
        public static int ToInt(this System.Enum e)
        {
            return e.GetHashCode();
        }
    }
}