using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
using AIMSModel;
using AIMSObjectQuery;
using System.Collections.Generic;
using HelperDB;

namespace AIMSDAL
{
    public partial class DKnowledgeBase
    {
        #region 插入实体操作部份
        /// <summary>
        /// 插入
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>标识列值或影响的记录行数</returns>
        public static int Insert(SqlCommand cmd, KnowledgeBase knowledgeBase)
        {
            cmd.Parameters.Clear();
            cmd.CommandText = "insert into KnowledgeBase (ParentId,Nanme,Content,OrderBy,ImagePath,VideoPath) values (@ParentId,@Nanme,@Content,@OrderBy,@ImagePath,@VideoPath);select @@identity";
            //从实体中取出值放入Command的参数列表
            cmd.Parameters.Add(new SqlParameter("@ParentId", knowledgeBase.ParentId.HasValue ? (object)knowledgeBase.ParentId.Value : (object)DBNull.Value));
            cmd.Parameters.Add(new SqlParameter("@Nanme", knowledgeBase.Nanme == null ? (object)DBNull.Value : (object)knowledgeBase.Nanme));
            cmd.Parameters.Add(new SqlParameter("@Content", knowledgeBase.Content == null ? (object)DBNull.Value : (object)knowledgeBase.Content));
            cmd.Parameters.Add(new SqlParameter("@OrderBy", knowledgeBase.OrderBy.HasValue ? (object)knowledgeBase.OrderBy.Value : (object)DBNull.Value));
            cmd.Parameters.Add(new SqlParameter("@ImagePath", knowledgeBase.ImagePath == null ? (object)DBNull.Value : (object)knowledgeBase.ImagePath));
            cmd.Parameters.Add(new SqlParameter("@VideoPath", knowledgeBase.VideoPath == null ? (object)DBNull.Value : (object)knowledgeBase.VideoPath));
            return Convert.ToInt32(cmd.ExecuteScalar());
        }
        /// <summary>
        /// 不使用事务的插入方法
        /// </summary>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>标识列值或影响的记录行数</returns>
        public static int Insert(KnowledgeBase knowledgeBase)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return Insert(cmd, knowledgeBase);
                }
            }
        }

        /// <summary>
        /// 使用事务的插入方法
        /// </summary>
        /// <param name="connection">实现共享Connection的对象</param>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>标识列值或影响的记录行数</returns>
        public static int Insert(Connection connection, KnowledgeBase knowledgeBase)
        {
            return Insert(connection.Command, knowledgeBase);
        }
        #endregion

        #region 删除实体操作

        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>影响的记录行数</returns>
        public static int ExcuteDeleteCommand(SqlCommand cmd, KnowledgeBase knowledgeBase)
        {
            cmd.Parameters.Clear();
            cmd.CommandText = "delete from KnowledgeBase where Id=@Id";
            //从实体中取出值放入Command的参数列表
            cmd.Parameters.Add(new SqlParameter("@Id", knowledgeBase.Id));
            return cmd.ExecuteNonQuery();
        }
        /// <summary>
        /// 不使用事务的删除方法
        /// </summary>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>影响的记录行数</returns>
        public static int Delete(KnowledgeBase knowledgeBase)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return ExcuteDeleteCommand(cmd, knowledgeBase);
                }
            }
        }
        /// <summary>
        /// 使用事务的删除方法
        /// </summary>
        /// <param name="connection">实现共享Connection的对象</param>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>影响的记录行数</returns>
        public static int Delete(Connection connection, KnowledgeBase knowledgeBase)
        {
            return ExcuteDeleteCommand(connection.Command, knowledgeBase);
        }

        /// <summary>
        /// 执行删除命令
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>影响的记录行数</returns>
        public static int ExcuteDeleteCommand(SqlCommand cmd, string oql, ParameterList parameters)
        {
            //解析过滤部份Sql语句
            string filterString = SyntaxAnalyzer.ParseSql(oql, new KnowledgeBaseMap());
            if (filterString != string.Empty)
            {
                filterString = " where " + filterString;
            }
            cmd.Parameters.Clear();
            cmd.CommandText = "delete from KnowledgeBase " + filterString;
            //添加参数
            if (parameters != null)
            {
                foreach (string key in parameters.Keys)
                {
                    cmd.Parameters.Add(new SqlParameter(key, parameters[key]));
                }
            }
            return cmd.ExecuteNonQuery();
        }

        /// <summary>
        /// 不使用事务的删除方法
        /// </summary>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>影响的记录行数</returns>
        public static int Delete(string oql, ParameterList parameters)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return ExcuteDeleteCommand(cmd, oql, parameters);
                }
            }
        }

        /// <summary>
        /// 使用事务的删除方法
        /// </summary>
        /// <param name="connection">实现共享Connection的对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>影响的记录行数</returns>
        public static int Delete(Connection connection, string oql, ParameterList parameters)
        {
            return ExcuteDeleteCommand(connection.Command, oql, parameters);
        }

        #endregion

        #region 更新实体操作

        /// <summary>
        /// 更新
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>影响的记录行数</returns>
        public static int ExcuteUpdateCommand(SqlCommand cmd, KnowledgeBase knowledgeBase)
        {
            cmd.CommandText = "update KnowledgeBase set ParentId=@ParentId,Nanme=@Nanme,Content=@Content,OrderBy=@OrderBy,ImagePath=@ImagePath,VideoPath=@VideoPath where Id=@Id";
            //从实体中取出值放入Command的参数列表
            cmd.Parameters.Add(new SqlParameter("@ParentId", knowledgeBase.ParentId.HasValue ? (object)knowledgeBase.ParentId.Value : (object)DBNull.Value));
            cmd.Parameters.Add(new SqlParameter("@Nanme", knowledgeBase.Nanme == null ? (object)DBNull.Value : (object)knowledgeBase.Nanme));
            cmd.Parameters.Add(new SqlParameter("@Content", knowledgeBase.Content == null ? (object)DBNull.Value : (object)knowledgeBase.Content));
            cmd.Parameters.Add(new SqlParameter("@OrderBy", knowledgeBase.OrderBy.HasValue ? (object)knowledgeBase.OrderBy.Value : (object)DBNull.Value));
            cmd.Parameters.Add(new SqlParameter("@ImagePath", knowledgeBase.ImagePath == null ? (object)DBNull.Value : (object)knowledgeBase.ImagePath));
            cmd.Parameters.Add(new SqlParameter("@VideoPath", knowledgeBase.VideoPath == null ? (object)DBNull.Value : (object)knowledgeBase.VideoPath));
            cmd.Parameters.Add(new SqlParameter("@Id", knowledgeBase.Id));
            return cmd.ExecuteNonQuery();
        }

        /// <summary>
        /// 不使用事务的更新方法
        /// </summary>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>影响的记录行数</returns>
        public static int Update(KnowledgeBase knowledgeBase)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return ExcuteUpdateCommand(cmd, knowledgeBase);
                }
            }
        }
        /// <summary>
        /// 使用事务的更新方法
        /// </summary>
        /// <param name="connection">实现共享Connection的对象</param>
        /// <param name="knowledgeBase">实体类对象</param>
        /// <returns>影响的记录行数</returns>
        public static int Update(Connection connection, KnowledgeBase knowledgeBase)
        {
            return ExcuteUpdateCommand(connection.Command, knowledgeBase);
        }
        /// <summary>
        /// 执行更新命令
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>影响的记录行数</returns>
        public static int ExcuteUpdateCommand(SqlCommand cmd, string oql, ParameterList parameters)
        {
            //解析过滤部份Sql语句
            string updateString = SyntaxAnalyzer.ParseSql(oql, new KnowledgeBaseMap());
            cmd.CommandText = "update KnowledgeBase set " + updateString;
            cmd.Parameters.Clear();
            //添加参数
            if (parameters != null)
            {
                foreach (string key in parameters.Keys)
                {
                    cmd.Parameters.Add(new SqlParameter(key, parameters[key]));
                }
            }
            return cmd.ExecuteNonQuery();
        }

        /// <summary>
        /// 不使用事务的更新方法
        /// </summary>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>影响的记录行数</returns>
        public static int Update(string oql, ParameterList parameters)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return ExcuteUpdateCommand(cmd, oql, parameters);
                }
            }
        }

        /// <summary>
        /// 使用事务的更新方法
        /// </summary>
        /// <param name="connection">实现共享Connection的对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>影响的记录行数</returns>
        public static int Update(Connection connection, string oql, ParameterList parameters)
        {
            return ExcuteUpdateCommand(connection.Command, oql, parameters);
        }
        #endregion

        #region 查询实体集合
        /// <summary>
        /// 执行Command获取对象列表
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体类对象列表</returns>
        public static List<KnowledgeBase> ExcuteSelectCommand(SqlCommand cmd, RecursiveType recursiveType, int recursiveDepth)
        {
            List<KnowledgeBase> knowledgeBaseList = new List<KnowledgeBase>();
            using (SqlDataReader dr = cmd.ExecuteReader())
            {
                while (dr.Read())
                {
                    KnowledgeBase knowledgeBase = DataReaderToEntity(dr);
                    knowledgeBaseList.Add(knowledgeBase);
                }
            }
            return knowledgeBaseList;
        }
        /// <summary>
        /// 执行查询命令
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体类对象集合</returns>
        public static List<KnowledgeBase> ExcuteSelectCommand(SqlCommand cmd, string oql, ParameterList parameters, RecursiveType recursiveType, int recursiveDepth)
        {
            //解析过滤部份Sql语句
            string filterString = SyntaxAnalyzer.ParseSql(oql, new KnowledgeBaseMap());
            if (filterString != string.Empty)
            {
                if (filterString.Trim().ToLower().IndexOf("order ") != 0)
                    filterString = " where " + filterString;
            }
            cmd.Parameters.Clear();
            cmd.CommandText = "select * from KnowledgeBase " + filterString;
            //添加参数
            if (parameters != null)
            {
                foreach (string key in parameters.Keys)
                {
                    cmd.Parameters.Add(new SqlParameter(key, parameters[key]));
                }
            }
            return ExcuteSelectCommand(cmd, recursiveType, recursiveDepth);
        }

        /// <summary>
        /// 根据对象查询语句查询实体集合
        /// </summary>
        /// <returns>实体类对象集合</returns>
        public static List<KnowledgeBase> Select()
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    cmd.CommandText = "select * from KnowledgeBase";
                    return ExcuteSelectCommand(cmd, RecursiveType.Parent, 1);
                }
            }
        }
        /// <summary>
        /// 根据对象查询语句查询实体集合
        /// </summary>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体类对象集合</returns>
        public static List<KnowledgeBase> Select(RecursiveType recursiveType, int recursiveDepth)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    cmd.CommandText = "select * from KnowledgeBase";
                    return ExcuteSelectCommand(cmd, recursiveType, recursiveDepth);
                }
            }
        }

        /// <summary>
        /// 根据对象查询语句查询实体集合
        /// </summary>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>实体类对象集合</returns>
        public static List<KnowledgeBase> Select(string oql, ParameterList parameters)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return ExcuteSelectCommand(cmd, oql, parameters, RecursiveType.Parent, 1);
                }
            }
        }

        /// <summary>
        /// 根据对象查询语句查询实体集合
        /// </summary>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体类对象集合</returns>
        public static List<KnowledgeBase> Select(string oql, ParameterList parameters, RecursiveType recursiveType, int recursiveDepth)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return ExcuteSelectCommand(cmd, oql, parameters, recursiveType, recursiveDepth);
                }
            }
        }

        /// <summary>
        /// 根据对象查询语句查询实体集合（启用事务）
        /// </summary>
        /// <param name="connection">连接对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体类对象集合</returns>
        public static List<KnowledgeBase> Select(Connection connection, string oql, ParameterList parameters, RecursiveType recursiveType, int recursiveDepth)
        {
            return ExcuteSelectCommand(connection.Command, oql, parameters, recursiveType, recursiveDepth);
        }
        #endregion

        #region 查询单个实体

        /// <summary>
        /// 递归查询单个实体
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体对象</returns>
        public static KnowledgeBase ExcuteSelectSingleCommand(SqlCommand cmd, RecursiveType recursiveType, int recursiveDepth)
        {
            KnowledgeBase knowledgeBase = null;
            using (SqlDataReader dr = cmd.ExecuteReader())
            {
                if (dr.Read())
                    knowledgeBase = DataReaderToEntity(dr);
            }
            if (knowledgeBase == null)
                return knowledgeBase;
            return knowledgeBase;
        }
        /// <summary>
        /// 更据对象查询语句递归查询单个实体
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体对象</returns>
        public static KnowledgeBase ExcuteSelectSingleCommand(SqlCommand cmd, string oql, ParameterList parameters, RecursiveType recursiveType, int recursiveDepth)
        {
            //解析过滤部份Sql语句
            string filterString = SyntaxAnalyzer.ParseSql(oql, new KnowledgeBaseMap());
            if (filterString != string.Empty)
            {
                filterString = " where " + filterString;
            }
            cmd.CommandText = "select * from KnowledgeBase " + filterString;
            cmd.Parameters.Clear();
            //添加参数
            if (parameters != null)
            {
                foreach (string key in parameters.Keys)
                {
                    cmd.Parameters.Add(new SqlParameter(key, parameters[key]));
                }
            }
            return ExcuteSelectSingleCommand(cmd, recursiveType, recursiveDepth);
        }

        /// <summary>
        /// 更据对象查询语句递归查询单个实体
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体对象</returns>
        public static KnowledgeBase SelectSingle(string oql, ParameterList parameters, RecursiveType recursiveType, int recursiveDepth)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return ExcuteSelectSingleCommand(cmd, oql, parameters, recursiveType, recursiveDepth);
                }
            }
        }

        /// <summary>
        /// 更据对象查询语句查询单个实体
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>实体对象</returns>
        public static KnowledgeBase SelectSingle(string oql, ParameterList parameters)
        {
            return SelectSingle(oql, parameters, RecursiveType.Parent, 1);
        }

        /// <summary>
        /// 更据对象查询语句并启用事务查询单个实体
        /// </summary>
        /// <param name="connection">连接对象</param>
        /// <param name="oql">对象查询语句</param>
        /// <param name="parameters">参数列表</param>
        /// <returns>实体对象</returns>
        public static KnowledgeBase SelectSingle(Connection connection, string oql, ParameterList parameters, RecursiveType recursiveType, int recursiveDepth)
        {
            return ExcuteSelectSingleCommand(connection.Command, oql, parameters, recursiveType, recursiveDepth);
        }

        /// <summary>
        /// 更据主键值递归查询单个实体
        /// </summary>
        /// <param name="cmd">Command对象</param>
        /// <param name="id">主键值</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体对象</returns>
        public static KnowledgeBase SelectSingle(SqlCommand cmd, int? id, RecursiveType recursiveType, int recursiveDepth)
        {
            cmd.Parameters.Clear();
            if (id.HasValue)
            {
                cmd.CommandText = "select * from KnowledgeBase where Id=@pk";
                cmd.Parameters.Add(new SqlParameter("@pk", id.Value));
            }
            else
            {
                cmd.CommandText = "select * from KnowledgeBase where Id is null";
            }
            return ExcuteSelectSingleCommand(cmd, recursiveType, recursiveDepth);
        }

        /// <summary>
        /// 按主键字段查询特定实体
        /// </summary>
        /// <param name="id">主键值</param>
        /// <returns>实体类对象</returns>
        public static KnowledgeBase SelectSingle(int? id)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return SelectSingle(cmd, id, RecursiveType.Parent, 1);
                }
            }
        }
        /// <summary>
        /// 按主键字段查询特定实体
        /// </summary>
        /// <param name="id">主键值</param>
        /// <param name="recursiveType">递归类型</param>
        /// <param name="recursiveDepth">递归深度</param>
        /// <returns>实体类对象</returns>
        public static KnowledgeBase SelectSingle(int? id, RecursiveType recursiveType, int recursiveDepth)
        {
            using (SqlConnection conn = new SqlConnection(Connection.ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    return SelectSingle(cmd, id, recursiveType, recursiveDepth);
                }
            }
        }

        /// <summary>
        /// 使用事务并按主键字段查询特定实体
        /// </summary>
        /// <param name="connection">连接对象</param>
        /// <param name="id">主键值</param>
        /// <returns>实体类对象</returns>
        public static KnowledgeBase SelectSingle(Connection connection, int? id, RecursiveType recursiveType, int recursiveDepth)
        {
            return SelectSingle(connection.Command, id, recursiveType, recursiveDepth);
        }
        #endregion


        /// <summary>
        /// 从DataReader中取出值生成实体对象
        /// </summary>
        /// <param name="searcher">查询对象</param>
        /// <returns>过滤条件字符串</returns>
        private static KnowledgeBase DataReaderToEntity(SqlDataReader dr)
        {
            KnowledgeBase entity = new KnowledgeBase();
            if (dr["Id"] != System.DBNull.Value)
            {
                entity.Id = Convert.ToInt32(dr["Id"]);
            }
            if (dr["ParentId"] != System.DBNull.Value)
            {
                entity.ParentId = Convert.ToInt32(dr["ParentId"]);
            }
            if (dr["Nanme"] != System.DBNull.Value)
            {
                entity.Nanme = dr["Nanme"].ToString();
            }
            if (dr["Content"] != System.DBNull.Value)
            {
                entity.Content = dr["Content"].ToString();
            }
            if (dr["OrderBy"] != System.DBNull.Value)
            {
                entity.OrderBy = Convert.ToInt32(dr["OrderBy"]);
            }
            if (dr["ImagePath"] != System.DBNull.Value)
            {
                entity.ImagePath = dr["ImagePath"].ToString();
            }
            if (dr["VideoPath"] != System.DBNull.Value)
            {
                entity.VideoPath = dr["VideoPath"].ToString();
            }
            return entity;
        }

        public static DataTable datatable() 
        {
            return DBHelper.GetDataTable("select * from KnowledgeBase");
        }

    }
}