namespace BLL
{
    using System;
    using System.Collections.Generic;
    using System.Globalization;
    using System.Data.Linq;
    using System.Reflection;
    using System.Text;

    /// <summary>
    /// 通用方法类。
    /// </summary>
    public static class Funs
    {
        /// <summary>
        /// 维护一个DB集合
        /// </summary>
        private static Dictionary<int, Model.HJGLDB> dataBaseLinkList = new System.Collections.Generic.Dictionary<int, Model.HJGLDB>();

        /// <summary>
        /// 维护一个DB集合
        /// </summary>
        public static System.Collections.Generic.Dictionary<int, Model.HJGLDB> DBList
        {
            get
            {
                return dataBaseLinkList;
            }
        }

        /// <summary>
        /// 数据库连接字符串
        /// </summary>
        private static string connString;
       
        /// <summary>
        /// 数据库连结字符串。
        /// </summary>
        public static string ConnString
        {
            get
            {
                if (connString == null)
                {
                    throw new NotSupportedException("请设置连接字符串！");
                }

                return connString;
            }

            set
            {
                if (connString != null)
                {
                    throw new NotSupportedException("连接已设置！");
                }

                connString = value;
            }
        }

        /// <summary>
        /// 单位设置
        /// </summary>
        public static string UnitSet
        {
            get;
            set;
        }

        /// <summary>
        /// 路径
        /// </summary>
        public static string RootPath
        {
            get;
            set;
        }

        /// <summary>
        /// 系统名
        /// </summary>
        public static string SystemName
        {
            get;
            set;
        }

        /// <summary>
        /// APP下载地址
        /// </summary>
        public static string APPUrl
        {
            get;
            set;
        }

        /// <summary>
        /// 使用单位
        /// </summary>
        public static string UsingUnit
        {
            get;
            set;
        }

        /// <summary>
        /// 每页数量
        /// </summary>
        public static int PageSize
        {
            get;
            set;
        } = 15;

        /// <summary>
        /// 数据库上下文。
        /// </summary>
        public static Model.HJGLDB DB
        {
            get
            {
                if (!DBList.ContainsKey(System.Threading.Thread.CurrentThread.ManagedThreadId))
                {
                    DBList.Add(System.Threading.Thread.CurrentThread.ManagedThreadId, new Model.HJGLDB(connString));
                }

                return DBList[System.Threading.Thread.CurrentThread.ManagedThreadId];
            }
        }

        public static void PleaseSelect(System.Web.UI.WebControls.DropDownList DDL, string itemText)
        {
            DDL.Items.Insert(0, new System.Web.UI.WebControls.ListItem(itemText, BLL.Const._Null));
            return;
        }

        /// <summary>
        /// 为目标下拉框加上 "请选择" 项
        /// </summary>
        /// <param name="DLL">目标下拉框</param>
        public static void FineUIPleaseSelect(FineUIPro.DropDownList DDL)
        {
            DDL.Items.Insert(0, new FineUIPro.ListItem("- 请选择 -", BLL.Const._Null));
            return;
        }


        public static void FineUIPleaseSelect(FineUIPro.DropDownList DDL, string itemText)
        {
            DDL.Items.Insert(0, new FineUIPro.ListItem(itemText, BLL.Const._Null));
            return;
        }

        /// <summary>
        /// 为目标下拉框加上 "重新编制" 项
        /// </summary>
        /// <param name="DLL">目标下拉框</param>
        public static void ReCompileSelect(System.Web.UI.WebControls.DropDownList DDL)
        {
            DDL.Items.Insert(0, new System.Web.UI.WebControls.ListItem("重新编制", "0"));
            return;
        }

        /// <summary>
        /// 为目标下拉框加上 "重新编制" 项
        /// </summary>
        /// <param name="DLL">目标下拉框</param>
        public static void FineUIReCompileSelect(FineUIPro.DropDownList DDL)
        {
            DDL.Items.Insert(0, new FineUIPro.ListItem("重新编制", "0"));
            return;
        }

        /// <summary>
        /// 加密密码
        /// </summary>
        /// <param name="password">加密前的密码</param>
        /// <returns>加密后的密码</returns>
        public static string EncryptionPassword(string password)
        {
            System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create();
            return BitConverter.ToString(md5.ComputeHash(Encoding.UTF8.GetBytes(password))).Replace("-", null);

            //return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(password, "MD5");
        }

        /// <summary>
        /// 字符串是否为浮点数
        /// </summary>
        /// <param name="decimalStr">要检查的字符串</param>
        /// <returns>返回是或否</returns>
        public static bool IsDecimal(string decimalStr)
        {
            if (String.IsNullOrEmpty(decimalStr))
            {
                return false;
            }

            try
            {
                Convert.ToDecimal(decimalStr, NumberFormatInfo.InvariantInfo);
                return true;
            }
            catch (Exception ex)
            {
                ErrLogInfo.WriteLog(ex);
                return false;
            }
        }

        /// <summary>
        /// 判断一个字符串是否是整数
        /// </summary>
        /// <param name="integerStr">要检查的字符串</param>
        /// <returns>返回是或否</returns>
        public static bool IsInteger(string integerStr)
        {
            if (String.IsNullOrEmpty(integerStr))
            {
                return false;
            }

            try
            {
                Convert.ToInt32(integerStr, NumberFormatInfo.InvariantInfo);
                return true;
            }
            catch (Exception ex)
            {
                ErrLogInfo.WriteLog(ex);
                return false;
            }
        }

        /// <summary>
        /// 获取新的数字
        /// </summary>
        /// <param name="number">要转换的数字</param>
        /// <returns>新的数字</returns>
        public static string InterceptDecimal(object number)
        {
            if (number == null)
            {
                return null;
            }
            decimal newNumber = 0;
            string newNumberStr = "";
            int an = -1;
            string numberStr = number.ToString();
            int n = numberStr.IndexOf(".");
            if (n == -1)
            {
                return numberStr;
            }
            for (int i = n + 1; i < numberStr.Length; i++)
            {
                string str = numberStr.Substring(i, 1);
                if (str == "0")
                {
                    if (GetStr(numberStr, i))
                    {
                        an = i;
                        break;
                    }
                }
            }
            if (an == -1)
            {
                newNumber = Convert.ToDecimal(numberStr);
            }
            else if (an == n + 1)
            {

                newNumberStr = numberStr.Substring(0, an - 1);
                newNumber = Convert.ToDecimal(newNumberStr);
            }
            else
            {
                newNumberStr = numberStr.Substring(0, an);
                newNumber = Convert.ToDecimal(newNumberStr);
            }
            return newNumber.ToString();
        }

        /// <summary>
        /// 判断字符串从第n位开始以后是否都为0
        /// </summary>
        /// <param name="number">要判断的字符串</param>
        /// <param name="n">开始的位数</param>
        /// <returns>false不都为0，true都为0</returns>
        public static bool GetStr(string number, int n)
        {
            for (int i = n; i < number.Length; i++)
            {
                if (number.Substring(i, 1) != "0")
                {
                    return false;
                }
            }
            return true;
        }

        /// <summary>
        /// 获取三位流水号
        /// </summary>
        /// <param name="num"></param>
        /// <returns></returns>
        public static string GetThreeNumber(string num)
        {
            int number = 0;
            string reValue = string.Empty;
            try
            {
                number = Int32.Parse(num) + 1;
                if (number.ToString().Length == 1)
                {
                    reValue = "00" + number.ToString();
                }
                else if (number.ToString().Length == 2)
                {
                    reValue = "0" + number.ToString();
                }
                else
                {
                    reValue = number.ToString();
                }
                return reValue;
            }
            catch (Exception ex)
            {
                ErrLogInfo.WriteLog(ex);
                return "";
            }
        }

        /// <summary>
        /// 截取字符串长度
        /// </summary>
        /// <param name="str">要截取的字符串</param>
        /// <param name="n">长度</param>
        /// <returns>截取后字符串</returns>
        public static string GetSubStr(object str, object n)
        {
            if (str != null)
            {
                if (str.ToString().Length > Convert.ToInt32(n))
                {
                    return str.ToString().Substring(0, Convert.ToInt32(n)) + "....";
                }
                else
                {
                    return str.ToString();
                }
            }
            return "";
        }


        /// <summary>
        /// 输入文本转换时间类型
        /// </summary>
        /// <returns></returns>
        public static DateTime? GetNewDateTime(string time)
        {
            if (!String.IsNullOrEmpty(time))
            {
                try
                {
                    return DateTime.Parse(time);
                }
                catch (Exception ex)
                {
                    ErrLogInfo.WriteLog(ex);
                    return null;
                }
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// 输入文本转换数字
        /// </summary>
        /// <returns></returns>
        public static decimal? GetNewDecimal(string value)
        {
            if (!String.IsNullOrEmpty(value))
            {
                try
                {
                    return decimal.Parse(value);
                }
                catch (Exception ex)
                {
                    ErrLogInfo.WriteLog(ex);
                    return null;
                }
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// 输入文本转换数字
        /// </summary>
        /// <returns></returns>
        public static decimal GetNewDecimalOrZero(string value)
        {
            decimal returnValue = 0;
            if (!String.IsNullOrEmpty(value))
            {
                try
                {
                    returnValue = decimal.Parse(value);
                }
                catch (Exception ex)
                {
                    ErrLogInfo.WriteLog(ex);
                    return returnValue;
                }
            }

            return returnValue;
        }


        /// <summary>
        /// 输入文本转换数字类型
        /// </summary>
        /// <returns></returns>
        public static int? GetNewInt(string value)
        {
            if (!String.IsNullOrEmpty(value))
            {
                try
                {
                    return Int32.Parse(value);
                }
                catch (Exception ex)
                {
                    ErrLogInfo.WriteLog(ex);
                    return null;
                }
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// 输入文本转换数字类型
        /// </summary>
        /// <returns></returns>
        public static int GetNewIntOrZero(string value)
        {
            int returnValue = 0;
            if (!String.IsNullOrEmpty(value))
            {
                try
                {
                    returnValue = Int32.Parse(value);
                }
                catch (Exception ex)
                {
                    ErrLogInfo.WriteLog(ex);
                    return returnValue;
                }
            }
            return returnValue;
        }

        /// <summary>
        /// 指定上传文件的名称
        /// </summary>
        /// <returns></returns>
        public static string GetNewFileName()
        {
            Random rm = new Random(System.Environment.TickCount);
            return System.DateTime.Now.ToString("yyyyMMddhhmmss") + rm.Next(1000, 9999).ToString();
        }

        /// <summary>
        /// 根据标识返回字符串list
        /// </summary>
        /// <param name="str"></param>
        /// <param name="n"></param>
        /// <returns></returns>
        public static List<string> GetStrListByStr(string str, char n)
        {
            List<string> strList = new List<string>();
            if (!string.IsNullOrEmpty(str))
            {
                strList.AddRange(str.Split(n));
            }

            return strList;
        }

        /// <summary>
        /// 去除小数后无效的0
        /// </summary>
        /// <param name="str"></param>
        /// <param name="n"></param>
        /// <returns></returns>
        public static string GetClearZero(decimal dNum)
        {
            string strNum = dNum.ToString();
            if (strNum.Contains("."))
            {
                strNum = strNum.TrimEnd('0').TrimEnd('.');
            }
            return strNum;
        }

        /// <summary>
        /// 根据第一页和第二页行数及总记录数，确定需要打印几页
        /// </summary>
        /// <param name="pageSize1">第一页行数</param>
        /// <param name="pageSize2">第二页行数</param>
        /// <param name="count">总记录数</param>
        /// <returns></returns>
        public static int GetPagesCountByPageSize(int pageSize1, int pageSize2, int count)
        {
            int pagesCount = 0;
            if (pageSize1 >= count)    //总记录数小于等于第一页行数
            {
                pagesCount = 1;
            }
            else if (count > pageSize1 && count <= (pageSize1 + pageSize2))   //总记录数大于第一页行数且小于等于第一页加第二页总行数
            {
                pagesCount = 2;
            }
            else    //总记录数大于第一页加第二页总行数
            {
                int lastCount = count - pageSize1;
                decimal c = Convert.ToDecimal(Math.Round(Convert.ToDecimal(lastCount) / Convert.ToDecimal(pageSize2), 2));
                if (c.ToString().IndexOf(".") > 0 && c.ToString().Substring(c.ToString().IndexOf("."), c.ToString().Length - c.ToString().IndexOf(".")) != ".00")
                {
                    string c1 = c.ToString().Substring(0, c.ToString().IndexOf("."));
                    pagesCount = Convert.ToInt32(c1) + 1;
                }
                else
                {
                    pagesCount = Convert.ToInt32(c);
                }
                pagesCount = pagesCount + 1;
            }
            return pagesCount;
        }

        /// <summary>
        /// 在设定的数值内产生随机数的数量
        /// </summary>
        /// <param name="num">随机数的数量</param>
        /// <param name="minValue">随机数的最小值</param>
        /// <param name="maxValue">随机数的最大值</param>
        /// <returns></returns>
        public static int[] GetRandomNum(int num, int minValue, int maxValue)
        {
            if ((maxValue + 1 - minValue - num < 0))
                maxValue += num - (maxValue + 1 - minValue);
            Random ra = new Random(unchecked((int)DateTime.Now.Ticks));
            int[] arrNum = new int[num];
            int tmp = 0;
            StringBuilder sb = new StringBuilder(num * maxValue.ToString().Trim().Length);

            for (int i = 0; i <= num - 1; i++)
            {
                tmp = ra.Next(minValue, maxValue);
                while (sb.ToString().Contains("#" + tmp.ToString().Trim() + "#"))
                    tmp = ra.Next(minValue, maxValue + 1);
                arrNum[i] = tmp;
                sb.Append("#" + tmp.ToString().Trim() + "#");
            }
            return arrNum;
        }

        // 获取一个随机数
        public static int GetRandomNum(int minValue, int maxValue)
        {
            Random ra = new Random(unchecked((int)DateTime.Now.Ticks));
            return ra.Next(minValue, maxValue);
        }

        /// <summary>
        /// 创建一个对象锁
        /// </summary>
        private static object newIdLocker = new object();

        /// <summary>
        /// 生成一个新的用于指定表的主键。
        /// </summary>
        /// <returns></returns>
        public static string GetNewID()
        {
            lock (newIdLocker)
            {
                return Guid.NewGuid().ToString();
            }
        }
        public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> source, Func<TSource, TKey> keySelector)
        {
            HashSet<TKey> seenKeys = new HashSet<TKey>();
            foreach (TSource element in source)
            {
                if (seenKeys.Add(keySelector(element)))
                {
                    yield return element;
                }
            }
        }

    }
}