using Api.Framework.Model;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;

namespace Api.Framework.Tools
{
    /// <summary>
    /// 持久层线程池
    /// </summary>
    public class SessionThreadLocal
    {
        private static ThreadLocal<SqlSugarClient> m_SessionLocal = new ThreadLocal<SqlSugarClient>();

        /// <summary>
        /// 设置持久层到线程池
        /// </summary>
        /// <param name="session"></param>
        public static void Set(SqlSugarClient session)
        {
            m_SessionLocal.Value = session;
        }

        /// <summary>
        /// 从线程池获取持久层
        /// </summary>
        /// <returns></returns>
        public static SqlSugarClient Get()
        {
            return m_SessionLocal.Value;
        }

        /// <summary>
        /// 清空线程池
        /// </summary>
        public static void Clear()
        {
            foreach (var item in m_SessionLocal.Values)
            {
                item.Close();
                item.Dispose();
            }
            m_SessionLocal.Value = null;
        }
    }

    /// <summary>
    /// 数据库链接配置
    /// </summary>
    public class ConnectionConfig
    {
        /// <summary>
        /// 数据库连接信息
        /// </summary>
        public string ConnectionString { get; set; }
        /// <summary>
        /// 数据库类型
        /// </summary>
        public DatabaseType DatabaseType { get; set; }

    }
    /// <summary>
    /// 数据库类型枚举，需要扩展类型可在此添加
    /// </summary>
    public enum DatabaseType : int
    {
        /// <summary>
        /// MSSQL数据库
        /// </summary>
        [Description("MSSQL数据库")]
        SQLSERVER = 1,
        /// <summary>
        /// ORACLE数据库
        /// </summary>
        [Description("ORACLE数据库")]
        ORACLE = 2,
        /// <summary>
        /// ACCESS数据库
        /// </summary>
        [Description("ACCESS数据库")]
        ACCESS = 3,
        /// <summary>
        /// MYSQL数据库
        /// </summary>
        [Description("MYSQL数据库")]
        MYSQL = 4,
        /// <summary>
        /// SQLITE数据库
        /// </summary>
        [Description("SQLITE数据库")]
        SQLITE = 5
    }

    /// <summary>
    /// 数据库基础类
    /// </summary>
    public class base_model
    {
        [SugarColumn(IsPrimaryKey = true, IsIdentity = true), Browsable(false), ReadOnly(false)]
        public long id { get; set; }
    }

    /// <summary>
    /// 分页查询结果
    /// </summary>
    /// <typeparam name="T">数据库表实体类</typeparam>
    public class PageResult<T>
    {
        /// <summary>
        /// 分页查询中总记录数
        /// </summary>
        public int Total { get; set; }

        /// <summary>
        /// 分页查询中结果集合
        /// </summary>
        public List<T> DataList { get; set; }
    }


    public class ParamMap
    {
        public List<SugarParameter> SugarParameters { get; private set; }
        public bool ContainsKey(string name)
        {
            return this.SugarParameters.FirstOrDefault(f => f.ParameterName == name) != null ? true : false;
        }
        public ParamMap()
        {
            OrderBySQL = string.Empty;
            SugarParameters = new List<SugarParameter>();
        }

        public void setParameter(string name, object value)
        {

            SugarParameters.Add(new SqlSugar.SugarParameter(name, value));
        }

        public int Index { get; private set; }
        public int PageSize { get; private set; }

        public void setPageParamters(int index, int pagesize)
        {
            this.Index = index;
            this.PageSize = pagesize;
        }


        public string OrderBySQL { get; private set; }
        /// <summary>
        /// 设置排序字段及排序方式
        /// </summary>
        /// <param name="orderFields">排序字段</param>
        /// <param name="isDesc">是否为递减排序</param>
        public void setOrderFields(string orderFields, bool isDesc)
        {
            OrderBySQL = $" Order by {orderFields} " + (isDesc ? "desc" : "asc") + " ";
        }
    }
    public static class SqlSugarExtend
    {

        public static PageResult<T> FindPage<T>(this SqlSugarClient session, string sql, ParamMap map)
        {
            string _temp = string.Empty;
            if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
            {
                _temp = $" limit {map.PageSize} offset {map.PageSize * (map.Index - 1)}";
            }
            else if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {
                _temp = $" limit {map.PageSize * (map.Index - 1)},{map.PageSize}";
            }

            //foreach (SugarParameter item in map.SugarParameters)
            //{
            //    sql = sql.Replace("@"+item.ParameterName,$"");
            //}

            PageResult<T> result = new PageResult<T>();

            result.DataList = session.Ado.SqlQuery<T>(sql + map.OrderBySQL + _temp, map.SugarParameters);


            //var reg = Regex.Matches(sql, @"(select [\w\W]+ from)");
            //if (reg.Count > 0)
            //{

            //}
            //var temp = Regex.Replace(sql, @"^select [\w\W]+ from", "select count(*) as count from");
            var start_index = sql.IndexOf("from");
            var temp_sql = "select count(*) as count " + sql.Substring(start_index);

            result.Total = int.Parse(session.FindRow(temp_sql, map.SugarParameters)["count"].ToString());

            return result;

        }
        public static ParamMap NewParamMap(this SqlSugarClient session)
        {
            return new ParamMap();
        }

        /// <summary> 
        /// 创建表
        /// </summary>
        /// <param name="type"></param>
        public static void CreateTable(this SqlSugarClient session, Type type)
        {

            //session.CodeFirst.BackupTable().InitTables(type);

            //获取公共属性
            PropertyInfo[] Propertys = type.GetProperties();

            if (Propertys.Length == 1) throw new Exception("字段最少需要2个。");
            StringBuilder sb = new StringBuilder();
            sb.Append("CREATE TABLE ");
            sb.Append(type.Name);
            sb.Append("(");
            int number = 0;
            foreach (var item in Propertys)
            {
                string _name = $"`{item.Name}`";
                if (_name == "interval")
                    _name = $"`{_name}`";
                string _type = string.Empty;
                bool _primary = false;
                var _unique = " ";
                var _attribute = item.GetCustomAttributes().FirstOrDefault(f => f.GetType() == typeof(SugarColumn)) as SugarColumn;
                if (_attribute != null)
                {
                    _name = _attribute.ColumnName;
                    //_type = _attribute.ty;
                    _primary = _attribute.IsPrimaryKey;
                    // _unique = _attribute.IsUnique ? " unique " : " ";
                }
                if (string.IsNullOrEmpty(_name)) _name = item.Name;
                number++;
                sb.Append(_name);
                if (item.Name.ToLower() == "id" || _primary)
                {
                    //sb.Append(" integer(11) primary key 自增 not null ");
                    sb.Append(" integer primary key 自增 not null ");
                }
                else if (!string.IsNullOrEmpty(_type))
                {
                    sb.Append(" " + _type + _unique);
                }
                else
                {
                    sb.Append(" ");
                    //if (item.PropertyType.FullName == typeof(Int32).ToString() || item.PropertyType.FullName == typeof(Int16).ToString() || item.PropertyType.FullName == typeof(UInt16).ToString() || item.PropertyType.FullName == typeof(Int64).ToString())
                    if (item.PropertyType.FullName == typeof(Int32).ToString() || item.PropertyType.FullName == typeof(Int16).ToString() || item.PropertyType.FullName == typeof(UInt16).ToString())
                        sb.Append(" integer(11) default 0 " + _unique);
                    else if (item.PropertyType.FullName == typeof(Int64).ToString())
                        sb.Append(" bigint(11) default 0 " + _unique);

                    else if (typeof(DateTime).ToString() == item.PropertyType.FullName)
                        sb.Append(" datetime " + _unique);
                    else if (typeof(String).ToString() == item.PropertyType.FullName)
                    {
                        if (_name.ToUpper() == "message".ToUpper() || _name.ToUpper() == "answer".ToUpper() || _name.ToUpper() == "token".ToUpper() || _name.ToUpper() == "dicvalue".ToUpper() || _name.ToUpper() == "ExtInfo".ToUpper() || _name.ToUpper() == "Signature".ToUpper() || _name.ToUpper() == "adzones".ToUpper() || _name.ToUpper() == "data".ToUpper() || _name.ToUpper() == "device_info".ToUpper() || _name.ToUpper().EndsWith("_text".ToUpper()) || _name.ToUpper().EndsWith("dic".ToUpper()))
                        {
                            if (session.CurrentConnectionConfig.DbType == DbType.MySql && _name.ToUpper().EndsWith("dic".ToUpper()))
                            {
                                sb.Append(" longtext " + _unique);
                            }
                            else
                                sb.Append(" text " + _unique);
                        }
                        else
                            sb.Append(" varchar(" + (_attribute == null ? 255 : (_attribute.Length == 0 ? 255 : _attribute.Length)) + ") default ''" + _unique);
                    }

                    else if (item.PropertyType.FullName == typeof(Char).ToString())
                        sb.Append(" varchar(2) default ''" + _unique);
                    else if (item.PropertyType.FullName == typeof(Boolean).ToString())
                        sb.Append(" boolean " + _unique);
                    else if (item.PropertyType.FullName == typeof(Double).ToString())
                        sb.Append(" double default 0.00" + _unique);
                    else
                    {
                        if (item.PropertyType.BaseType.Name == "Enum")
                        {
                            sb.Append(" integer default 0 " + _unique);
                        }
                        else
                        {
                            throw new Exception("不支持" + item.PropertyType.FullName + "字段，请联系框架设计师处理。");
                        }
                    }
                }
                if (number != Propertys.Length)
                {
                    sb.Append(",");
                }
            }
            sb.Append(");");
            string sql = sb.ToString();
            if (sql.Contains("自增"))
            {
                if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
                {
                    sql = sql.Replace("自增", "AUTOINCREMENT").Replace("AUTO_INCREMENT", "AUTOINCREMENT");
                }
                else if (session.CurrentConnectionConfig.DbType == DbType.MySql)
                {
                    sql = sql.Replace("自增", "AUTO_INCREMENT").Replace("AUTOINCREMENT", "AUTO_INCREMENT");
                }
            }

            session.ExcuteSQL(sql);
        }

        public static void CreateTable<T>(this SqlSugarClient session)
        {
            session.CreateTable(typeof(T));
        }

        public static void Update(this SqlSugarClient session, base_model model, object param = null)
        {
            StringBuilder sb = new StringBuilder("update " + model.GetType().Name + " set ");
            ParamMap map = session.NewParamMap();
            if (param != null)
            {
                PropertyInfo[] propertys = param.GetType().GetProperties();
                int number = 0;
                foreach (System.Reflection.PropertyInfo p in propertys)
                {
                    number++;
                    sb.Append(p.Name + "=@" + p.Name);
                    map.setParameter(p.Name, p.GetValue(param));
                    if (propertys.Length != number) sb.Append(",");
                }
                map.setParameter("id", model.id);
                sb.Append(" where id=@id;");
            }
        }

        public static bool IndexExist<T>(this SqlSugarClient session, params object[] values)
        {
            return IndexExist(session, typeof(T).Name, values);
        }

        public static bool IndexExist(this SqlSugarClient session, string tableName, params object[] values)
        {
            var indexName = tableName + "__" + string.Join("_", values);
            if (indexName.Length > 64)
                indexName = indexName.Substring(0, 64);

            if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {
                var db_name = string.Empty;
                var reg = Regex.Match(session.CurrentConnectionConfig.ConnectionString, "Data Source=(?<db_host>.*?);Initial Catalog=(?<db_name>.*?);Persist Security Info=True;User ID=(?<db_user>.*?);Password=(?<db_pass>.*?);Port=(?<db_port>.*?);");
                if (reg.Success)
                    db_name = reg.Groups["db_name"].ToString();
                var row = session.FindRow("SELECT * FROM information_schema.statistics WHERE table_schema = @db_name and table_name = @tableName AND index_name = @indexName", new { db_name = db_name, tableName = tableName, indexName = indexName });
                if (row != null) return true;
            }
            else if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
            {
                var row = session.FindRow("SELECT * FROM sqlite_master WHERE type = 'index' and tbl_name = @tableName and name = @indexName", new { tableName = tableName, indexName = indexName });
                if (row != null) return true;
            }
            return false;
        }

        /// <summary>
        /// 索引是否存在
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="session"></param>
        /// <param name="indexName"></param>
        /// <returns></returns>
        public static bool IndexExist<T>(this SqlSugarClient session, string indexName)
        {
            return IndexExist(session, typeof(T).Name, indexName);
        }

        /// <summary>
        /// 索引是否存在
        /// </summary>
        /// <param name="session"></param>
        /// <param name="tableName"></param>
        /// <param name="indexName"></param>
        /// <returns></returns>
        public static bool IndexExist(this SqlSugarClient session, string tableName, string indexName)
        {
            if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {
                var db_name = string.Empty;
                var reg = Regex.Match(session.CurrentConnectionConfig.ConnectionString, "Data Source=(?<db_host>.*?);Initial Catalog=(?<db_name>.*?);Persist Security Info=True;User ID=(?<db_user>.*?);Password=(?<db_pass>.*?);Port=(?<db_port>.*?);");
                if (reg.Success)
                    db_name = reg.Groups["db_name"].ToString();

                var row = session.FindRow("SELECT * FROM information_schema.statistics WHERE table_schema = @db_name and table_name = @tableName AND index_name = @indexName", new { db_name = db_name, tableName = tableName, indexName = tableName+ "__" + indexName });
                if (row != null) return true;
            }
            else if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
            {
                var row = session.FindRow("SELECT * FROM sqlite_master WHERE type = 'index' and tbl_name = @tableName and name = @indexName", new { tableName = tableName, indexName = indexName });
                if (row != null) return true;
            }
            return false;
        }

        /// <summary>
        /// 添加索引
        /// </summary>
        public static bool AddIndex<T>(this SqlSugarClient session, params object[] values)
        {
            try
            {
                string tableName = typeof(T).Name;
                string sql = string.Empty;
                var indexName = tableName + "__" + string.Join("_", values);
                if (indexName.Length > 64)
                    indexName = indexName.Substring(0, 64);

         


                if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
                    sql = $" CREATE  INDEX {indexName} ON {tableName} ({string.Join(",", values)});";
                else if (session.CurrentConnectionConfig.DbType == DbType.MySql)
                    sql = $"ALTER TABLE {tableName}  ADD INDEX {indexName}({string.Join(",", values)});";
                else throw new Exception("暂时不支持" + session.CurrentConnectionConfig.DbType + "数据库！");

                session.ExcuteSQL(sql);
                return true;
            }
            catch (Exception ex)
            {
                Console.WriteLine("创建索引失败：" + ex.Message);
            }
            return false;
        }

        public static bool DeleteIndex(this SqlSugarClient session, string tableName, string indexName)
        {
            if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {
                session.ExcuteSQL($"DROP INDEX {indexName} ON {tableName}");
            }
            else if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
            {
                session.ExcuteSQL($"DROP INDEX {indexName}");
            }
            return !session.IndexExist(tableName, indexName);
        }


        /// <summary>
        /// 判断表是否存在
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public static bool TableExist<T>(this SqlSugarClient session)
        {
            return TableExist(session, typeof(T).Name);
        }
        /// <summary>
        /// 判断表是否存在
        /// </summary>
        public static bool TableExist(this SqlSugarClient session, string tableName)
        {
            if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
            {
                var result = session.Ado.GetDataTable("SELECT * FROM sqlite_master where type='table' and name=@tableName;", new { tableName = tableName });
                if (result.Rows.Count == 0) return false;
            }
            else if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {

                //var result = session.Ado.GetDataTable("select TABLE_NAME from INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA=@dbName and TABLE_NAME=@tableName ;", new { tableName = Regex.Match(session.CurrentConnectionConfig.ConnectionString, "Initial Catalog=(.*?);").Groups[1].Value });
                var result = session.Ado.GetDataTable("select * from information_schema.TABLES where TABLE_SCHEMA=(select database()) and `table_name` =@tableName", new { tableName = tableName });

                if (result.Rows.Count == 0) return false;
                else
                {
                    //SELECT table_name FROM information_schema.TABLES WHERE table_name ='fl_plugin_pddrebate_pddtgw';
                    result = session.Ado.GetDataTable("SELECT table_name FROM information_schema.TABLES WHERE table_name = @tableName", new { tableName = tableName });
                    if (result.Rows.Count == 0) return false;
                }
            }
            else return false;

            return true;
        }

        /// <summary>
        /// 添加唯一约束
        /// </summary>
        public static void AddUnique<T>(this SqlSugarClient session, params object[] values)
        {
            AddUnique(session, typeof(T).Name, values);
        }

        /// <summary>
        /// 执行sql
        /// </summary>
        /// <param name="session"></param>
        /// <param name="sql"></param>
        /// <param name="parameters"></param>
        public static void ExcuteSQL(this SqlSugarClient session, string sql, object parameters = null)
        {
            session.Ado.ExecuteCommand(sql, parameters);
        }

        public static bool ExistUnique(this SqlSugarClient session, string tableName, params object[] values)
        {
            if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
            {
                return false;
            }
            else if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {
                //SELECT count(*) FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE where table_name = 'fl_statistics_record' and column_name = 'uid'  

                //var result = session.Ado.GetDataTable("SELECT count(*) FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE where table_name = @tableName and column_name = @column_name", new { tableName = tableName, column_name = columnName });

                StringBuilder strb = new StringBuilder($"SELECT * FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE where table_name = @tableName and CONSTRAINT_NAME = '{values[0]}'");
                //List<string> ors = new List<string>();
                //for (int i = 0; i < values.Length; i++)
                //{
                //    ors.Add($"column_name = '{values[i]}'");
                //}
                //strb.Append($"({string.Join(" or ", ors)});");

                var result = session.Ado.GetDataTable(strb.ToString(), new { tableName = tableName });
                var rows = result.Rows;
                if (rows.Count == 0)
                    return false;
                List<string> strs = new List<string>();

                foreach (System.Data.DataRow row in rows)
                {
                    var item = row["column_name"];
                    strs.Add(item.ToString());
                }

                string[] strs2 = new string[values.Length];
                values.CopyTo(strs2, 0);

                var notchongfu = strs.Except(strs2.ToList()).ToList();

                return notchongfu.Count == 0;
            }
            return true;
        }

        public static bool DeleteUnique(this SqlSugarClient session, string tableName, params object[] values)
        {
            try
            {
                if (values == null) throw new Exception("Unique 不能为空。");
                StringBuilder sb = new StringBuilder();
                if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
                {
                    sb.Append(" drop index ");
                    sb.Append(tableName);
                    foreach (var item in values)
                    {
                        sb.Append("_");
                        sb.Append(item);
                        sb.Append("_");
                    }
                }
                else if (session.CurrentConnectionConfig.DbType == DbType.MySql)
                {
                    try
                    {
                        sb.Append("ALTER TABLE ");
                        sb.Append(tableName);
                        sb.Append(" drop index ");
                        for (int i = 0; i < values.Length; i++)
                        {
                            sb.Append(values[i]);
                            if ((i + 1) != values.Length)
                            {
                                sb.Append(",");
                            }
                        }
                        sb.Append(";");
                        session.Ado.ExecuteCommand(sb.ToString());
                        return true;
                    }
                    catch (Exception)
                    {
                        sb.Length = 0;
                        sb.Append("ALTER TABLE ");
                        sb.Append(tableName);
                        sb.Append(" drop index ");
                        if (values.Length != 0)
                        {
                            sb.Append(values[0]);
                        }
                        sb.Append(";");
                        session.Ado.ExecuteCommand(sb.ToString());
                        return true;
                    }
                }
                else throw new Exception("暂时不支持" + session.CurrentConnectionConfig.DbType + "数据库！");

                session.Ado.ExecuteCommand(sb.ToString());
                return true;
            }
            catch (Exception ex)
            { }
            return false;
        }

        /// <summary>
        /// 添加唯一约束
        /// </summary>
        public static void AddUnique(this SqlSugarClient session, string tableName, params object[] values)
        {
            if (values == null) throw new Exception("Unique 不能为空。");
            StringBuilder sb = new StringBuilder();
            if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
            {
                sb.Append(" CREATE UNIQUE INDEX ");
                sb.Append(tableName);
                foreach (var item in values)
                {
                    sb.Append("_");
                    sb.Append(item);
                    sb.Append("_");
                }
                sb.Append(" ON ");
                sb.Append(tableName);
                sb.Append("(");
                for (int i = 0; i < values.Length; i++)
                {
                    sb.Append(values[i]);
                    if ((i + 1) != values.Length)
                    {
                        sb.Append(",");
                    }
                }
                sb.Append(");");
            }
            else if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {
                if (session.ExistUnique(tableName, values))
                    return;
                sb.Append("ALTER TABLE ");
                sb.Append(tableName);
                sb.Append(" ADD UNIQUE KEY(");
                for (int i = 0; i < values.Length; i++)
                {
                    sb.Append(values[i]);
                    if ((i + 1) != values.Length)
                    {
                        sb.Append(",");
                    }
                }
                sb.Append(");");
            }
            else throw new Exception("暂时不支持" + session.CurrentConnectionConfig.DbType + "数据库！");

            session.Ado.ExecuteCommand(sb.ToString());
        }

        /// <summary>
        /// 检测列是否存在
        /// </summary>
        /// <param name="session"></param>
        /// <param name="tableName"></param>
        /// <param name="columnName"></param>
        /// <returns></returns>
        public static bool ColumnExist(this SqlSugarClient session, string tableName, string columnName)
        {
            //IF NOT EXISTS (SELECT * FROM information_schema.columns WHERE table_schema = DATABASE()  AND table_name = 'vrv_paw_rule' AND column_name = 'thresholdMin') THEN
            //ALTER TABLE vrv_paw_rule ADD COLUMN thresholdMin  BIGINT;
            if (session.CurrentConnectionConfig.DbType == DbType.Sqlite)
            {
                var row = session.FindRow("select * from sqlite_master where name = @tableName and sql like @colunName;", new { tableName = tableName, colunName = "%" + columnName + "%" });
                {
                    if (row != null)
                    {
                        string sql = row["sql"].ToString().ToLower();

                        //var reg = Regex.Match(sql, @",?'?\s{0,}\[?""?" + columnName.ToLower() + @"""?\]?'?\s{1,}", RegexOptions.IgnoreCase);
                        var reg = Regex.Match(sql, @",?'?\s{0,}\[?""?" + columnName.ToLower() + @"""?\]?'?\s{1,}", RegexOptions.IgnoreCase);
                        if (reg.Success) return true;
                        else return false;

                        //return true;
                    }
                }
            }
            else if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {
                var row = session.FindRow("select * from information_schema.columns where table_schema = DATABASE() and table_name = @tableName and column_name like @colunName;", new { tableName = tableName, colunName = "%" + columnName + "%" });
                if (row != null) return true;
            }
            return false;
        }

        /// <summary>
        /// 增加列
        /// </summary>
        /// <param name="session"></param>
        /// <param name="tableName"></param>
        /// <param name="columnName"></param>
        /// <param name="sqlType"></param>
        public static void AddColumn(this SqlSugarClient session, string tableName, string columnName, string sqlType)
        {
            try
            {
                if (session.CurrentConnectionConfig.DbType == DbType.Sqlite) session.ExcuteSQL("alter table " + tableName + " add " + columnName + " " + sqlType);
                else if (session.CurrentConnectionConfig.DbType == DbType.MySql) session.ExcuteSQL("alter table " + tableName + " add column " + columnName + " " + sqlType);
            }
            catch (Exception ex)
            {
                EventClient.OnEvent("", $"增加字段异常：{ex.Message} - {tableName} - {columnName} - {sqlType}");
            }
        }

        /// <summary>
        /// 修改字段类型
        /// </summary>
        /// <param name="session"></param>
        /// <param name="tableName"></param>
        /// <param name="cloumnName"></param>
        /// <param name="newType"></param>
        public static void UpdateColumnType(this SqlSugarClient session, string tableName, string cloumnName, string newType)
        {
            if (session.CurrentConnectionConfig.DbType == DbType.MySql)
                session.ExcuteSQL("alter table " + tableName + " modify column " + cloumnName + " " + newType + ";");
        }

        /// <summary>
        /// 获得第一条数据
        /// </summary>
        /// <param name="session"></param>
        /// <param name="strSQL"></param>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static System.Data.DataRow FindRow(this SqlSugarClient session, string strSQL, Object obj)
        {
            if (session.CurrentConnectionConfig.DbType == SqlSugar.DbType.MySql)
            {
                strSQL = strSQL.Replace("[随机排序]", " order by rand() ");
            }
            else
            {
                strSQL = strSQL.Replace("[随机排序]", " order by RANDOM() ");
            }
            //获取公共属性

            var table = session.Ado.GetDataTable(strSQL, obj);
            if (table.Rows.Count > 0) return table.Rows[0];

            return null;
        }


        /// <summary>
        /// 获得Table
        /// </summary>
        /// <param name="session"></param>
        /// <param name="strSQL">SQL</param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static System.Data.DataTable FindTable(this SqlSugarClient session, string strSQL, object param = null)
        {
            return session.Ado.GetDataTable(strSQL, param);
        }

        /// <summary>
        /// 根据ID查数据、必须有为ID的字段
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="session"></param>
        /// <param name="id"></param>
        /// <returns></returns>
        public static T FindById<T>(this SqlSugarClient session, long id) where T : new()
        {
            return session.Queryable<T>().InSingle(2);
        }

        public static int Insertable(this SqlSugarClient session, base_model obj)
        {
            var t = obj.GetType();

            return session.Insertable(obj).ExecuteReturnIdentity();
        }

        public static List<T> Find<T>(this SqlSugarClient session, string strSQL, Object param = null) where T : new()
        {
            var tablename = typeof(T).Name;
            if (!strSQL.StartsWith("select"))
            {
                StringBuilder sb = new StringBuilder();
                sb.Append("select * from ");
                sb.Append(tablename);
                sb.Append(" where ");
                sb.Append(strSQL);

                strSQL = sb.ToString();
            }

            if (session.CurrentConnectionConfig.DbType == DbType.MySql)
            {
                strSQL = strSQL.Replace("[随机排序]", " order by rand() ");
            }
            else
            {
                strSQL = strSQL.Replace("[随机排序]", " order by RANDOM() ");
            }

            return session.Ado.SqlQuery<T>(strSQL, param);
        }

        public static T FindSingle<T>(this SqlSugarClient session, string strSQL, Object param = null) where T : new()
        {
            for (int i = 0; i < 5; i++)
            {
                var tablename = typeof(T).Name;
                if (!strSQL.StartsWith("select", StringComparison.OrdinalIgnoreCase))
                {
                    StringBuilder sb = new StringBuilder();
                    sb.Append("select * from ");
                    sb.Append(tablename);
                    sb.Append(" where ");
                    sb.Append(strSQL);

                    strSQL = sb.ToString();
                }

                if (session.CurrentConnectionConfig.DbType == DbType.MySql)
                {
                    strSQL = strSQL.Replace("[随机排序]", " order by rand() ");
                }
                else
                {
                    strSQL = strSQL.Replace("[随机排序]", " order by RANDOM() ");
                }

                return session.Ado.SqlQuerySingle<T>(strSQL, param);
            }
            return default(T);
        }

        /// <summary>
        /// 删除表
        /// </summary>
        /// <param name="session"></param>
        /// <param name="tableName"></param>
        public static void DropTable(this SqlSugarClient session, string tableName)
        {
            session.ExcuteSQL("DROP TABLE " + tableName);
        }

        /// <summary>
        /// 删除表
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="session"></param>
        public static void DropTable<T>(this SqlSugarClient session)
        {
            string table_name = typeof(T).Name;
            session.DropTable(table_name);
        }

        /// <summary>
        /// 开启事务
        /// </summary>
        /// <param name="session"></param>
        public static void BeginTransaction(this SqlSugarClient session)
        {
            session.Ado.BeginTran();
        }

        /// <summary>
        /// 回滚
        /// </summary>
        /// <param name="session"></param>
        public static void Rollback(this SqlSugarClient session)
        {
            session.Ado.RollbackTran();
        }

        /// <summary>
        /// 提交
        /// </summary>
        /// <param name="session"></param>
        public static void Commit(this SqlSugarClient session)
        {
            session.Ado.CommitTran();
        }
    }

}