using System;
using System.Collections;
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;

namespace MESClassLibrary
{
    public class Tool
    {
        public static string MD5encryption(string password)
        {
            try
            {
                if (!string.IsNullOrWhiteSpace(password))
                {
                    byte[] result = Encoding.Default.GetBytes(password);    //tbPass为输入密码的文本框
                    MD5 md5 = new MD5CryptoServiceProvider();
                    byte[] output = md5.ComputeHash(result);
                    return BitConverter.ToString(output).Replace("-", "");
                }
                else
                {
                    return null;
                }

            }
            catch (Exception)
            {
                return null;
            }


        }

        /// <summary>
        /// 算法偏移量
        /// </summary>
        const string m_IV = "12345678";

        /// <summary>
        /// 功能描述:根据输入的密钥生成8位密钥
        /// 作　　者: 爱给模板网 2gei.cn
        /// 创建日期:2015-07-20 17:25:26
        /// </summary>
        /// <param name="strkey">strkey</param>
        /// <returns>8位密钥</returns>
        private static string GetKey(string strkey)
        {
            if (string.IsNullOrEmpty(strkey))
            {
                strkey = "InfoColl";
            }
            if (strkey.Length % 8 == 0)
            {
                return strkey;
            }
            else
            {
                return GetKey(strkey + "0");
            }
        }

        /// <summary>
        /// 功能描述:加密字符串
        /// 作　　者: 爱给模板网 2gei.cn
        /// 创建日期:2015-07-20 17:18:31
        /// 任务编号:
        /// </summary>
        /// <param name="strSourceString">原字符串</param>
        /// <param name="strKey">密钥</param>
        /// <returns>加密后的字符串</returns>
        public static string Encrypt(string strSourceString, string strKey)
        {
            strKey = GetKey(strKey);
            byte[] btKey = Encoding.UTF8.GetBytes(strKey);

            byte[] btIV = Encoding.UTF8.GetBytes(m_IV);

            DESCryptoServiceProvider des = new DESCryptoServiceProvider();

            using (MemoryStream ms = new MemoryStream())
            {
                try
                {
                    byte[] inData = Encoding.UTF8.GetBytes(strSourceString);
                    using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write))
                    {
                        cs.Write(inData, 0, inData.Length);

                        cs.FlushFinalBlock();
                    }

                    return Convert.ToBase64String(ms.ToArray());
                }
                catch
                {
                    return strSourceString;
                }
            }
        }

        /// <summary>
        /// 功能描述:解密字符串
        /// 作　　者: 爱给模板网 2gei.cn
        /// 创建日期:2015-07-20 17:18:49
        /// 任务编号:
        /// </summary>
        /// <param name="strEncryptedString">原字符串</param>
        /// <param name="strKey">密钥</param>
        /// <returns>解密后的字符串</returns>
        public static string Decrypt(string strEncryptedString, string strKey)
        {
            strKey = GetKey(strKey);
            byte[] btKey = Encoding.UTF8.GetBytes(strKey);

            byte[] btIV = Encoding.UTF8.GetBytes(m_IV);

            DESCryptoServiceProvider des = new DESCryptoServiceProvider();

            using (MemoryStream ms = new MemoryStream())
            {
                try
                {
                    byte[] inData = Convert.FromBase64String(strEncryptedString);
                    using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
                    {
                        cs.Write(inData, 0, inData.Length);

                        cs.FlushFinalBlock();
                    }

                    return Encoding.UTF8.GetString(ms.ToArray());
                }
                catch
                {
                    return strEncryptedString;
                }
            }
        }

        /// <summary>
        /// DataTable转List
        /// lx 2017-06-27
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="table"></param>
        /// <returns></returns>
        public static IList<T> ConvertTo<T>(DataTable table)
        {
            if (table == null)
            {
                return null;
            }

            List<DataRow> rows = new List<DataRow>();

            foreach (DataRow row in table.Rows)
            {
                rows.Add(row);
            }

            return ConvertTo<T>(rows);
        }

        public static IList<T> ConvertTo<T>(IList<DataRow> rows)
        {
            IList<T> list = null;

            if (rows != null)
            {
                list = new List<T>();

                foreach (DataRow row in rows)
                {
                    T item = CreateItem<T>(row);
                    list.Add(item);
                }
            }

            return list;
        }

        public static T CreateItem<T>(DataRow row)
        {
            T obj = default(T);
            if (row != null)
            {
                obj = Activator.CreateInstance<T>();

                foreach (DataColumn column in row.Table.Columns)
                {
                    PropertyInfo prop = obj.GetType().GetProperty(column.ColumnName);
                    if (prop == null) continue;

                    try
                    {
                        object value = row[column.ColumnName];

                        object convertedValue = ConvertDbNullToDefaultValue(value, prop.PropertyType);
                       
                        prop.SetValue(obj, convertedValue, null);
                        //prop.SetValue(obj, value, null);
                    }
                    catch(Exception ex)
                    {  //You can log something here     
                        //throw;    
                    }
                }
            }

            return obj;
        }


        public static object ConvertDbNullToDefaultValue(object value, Type targetType)
        {
            if (value == DBNull.Value)
            {
                if (targetType.IsValueType)
                {
                    return Activator.CreateInstance(targetType); // 对于值类型返回默认值
                }
                return null; // 对于引用类型返回null
            }
            return value;
        }

        public static D Mapper<D, S>(S s)
        {
            D d = Activator.CreateInstance<D>();
            try
            {
                var Types = s.GetType();//获得类型  
                var Typed = typeof(D);
                foreach (PropertyInfo sp in Types.GetProperties())//获得类型的属性字段  
                {
                    foreach (PropertyInfo dp in Typed.GetProperties())
                    {
                        if (dp.Name == sp.Name)//判断属性名是否相同  
                        {
                            dp.SetValue(d, sp.GetValue(s, null), null);//获得s对象属性的值复制给d对象的属性  
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return d;
        }


        public static DataTable ListToDataTable(IList list)
        {
            DataTable result = new DataTable();
            if (list.Count > 0)
            {
                PropertyInfo[] propertys = list[0].GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {
                    //获取类型
                    Type colType = pi.PropertyType;
                    //当类型为Nullable<>时
                    if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof(Nullable<>)))
                    {
                        colType = colType.GetGenericArguments()[0];
                    }
                    result.Columns.Add(pi.Name, colType);
                }
                for (int i = 0; i < list.Count; i++)
                {
                    ArrayList tempList = new ArrayList();
                    foreach (PropertyInfo pi in propertys)
                    {
                        object obj = pi.GetValue(list[i], null);
                        tempList.Add(obj);
                    }
                    object[] array = tempList.ToArray();
                    result.LoadDataRow(array, true);
                }
            }
            return result;
        }
    }
}