using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using DataParameter =MySql.Data.MySqlClient.MySqlParameter;
using DataCommand = MySql.Data.MySqlClient.MySqlCommand;
using DataAdapter = MySql.Data.MySqlClient.MySqlDataAdapter;
using ryCommonDb;
using ryCommon;

namespace ryCommonDb
{
    /// <summary>
    /// 
    /// </summary>
    public class MySqlDataProvider:IDbInterface
    {
        readonly ClsMySQLDb myDb = new ClsMySQLDb();
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public int ConnDb(string sql)
        {
            var _sql = sql;
            if(_sql.IndexOfEx("Allow User Variables")<=0)
            {
                if (!_sql.EndsWith(";")) { _sql += ";"; }
                _sql += "Allow User Variables=True;";
            }
            myDb.fv_ConnStr = _sql;
            return myDb.ConnDb();
        }
        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public int CloseDb()
        {
            myDb.CloseDb();
            return 1;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="tableName"></param>
        /// <param name="wheresql"></param>
        /// <returns></returns>
        public int GetCount(string tableName, string wheresql)
        {
            string m_where = "";
            if (wheresql != "")
            {
                m_where = " where " + wheresql;
            }
            string sql = "select count(*) from " + tableName + m_where;
            return Convert.ToInt32(myDb.ExecuteSQL(sql, (DataParameter[])GetParameter(), "0")[0]);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="newPwd"></param>
        /// <returns></returns>
        public int ChangePwd(string newPwd)
        {
            return -1000;
        }
        private List<SQLIitem> list_param = new List<SQLIitem>();
        /// <summary>
        /// 
        /// </summary>
        /// <param name="name"></param>
        /// <param name="value"></param>
        public void AddParameter(string name,object value)
        {
            list_param.Add(new SQLIitem(name, value));
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="name"></param>
        /// <param name="value"></param>
        public void ClearParameter(object name, object value)
        {
            list_param.Clear();
        }
        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public object[] GetParameter()
        {
            DataParameter[] defPar = new DataParameter[list_param.Count];
            for (int i = 0; i < list_param.Count; i++)
            {
                SQLIitem item = (SQLIitem)list_param[i];
                defPar[i] = new DataParameter("@" + item.Field.TrimStart('@').TrimStart('[').TrimEnd(']'), item.value);
            }
            return defPar;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="mySQL"></param>
        /// <returns></returns>
        public object[] GetParameter(RyQuickSQL mySQL)
        {
            DataParameter[] defPar = new DataParameter[mySQL.List.Count + mySQL.List_param.Count];
            for (int i = 0; i < mySQL.List.Count; i++)
            {
                SQLIitem item = (SQLIitem)mySQL.List[i];
                defPar[i] = new DataParameter("@" + item.Field.TrimStart('@').TrimStart('[').TrimEnd(']'), item.value);
            }
            for (int i = mySQL.List.Count; i < mySQL.List.Count + mySQL.List_param.Count; i++)
            {
                SQLIitem item = (SQLIitem)mySQL.List_param[i - mySQL.List.Count];
                defPar[i] = new DataParameter("@" + item.Field.TrimStart('@').TrimStart('[').TrimEnd(']'), item.value);
            }
            return defPar;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="tableName"></param>
        /// <param name="wheresql"></param>
        /// <param name="orderSQL"></param>
        /// <returns></returns>
        public string GetPageSQL(string tableName, string wheresql, string orderSQL)
        {
            return GetPageSQL("*", tableName, wheresql, orderSQL);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="field"></param>
        /// <param name="tableName"></param>
        /// <param name="wheresql"></param>
        /// <param name="orderSQL"></param>
        /// <returns></returns>
        public string GetPageSQL(string field, string tableName, string wheresql, string orderSQL)
        {
            string m_where = "";
            if (wheresql != "")
            {
                m_where = " where " + wheresql;
            }
            string m_order = "";
            if (orderSQL != "")
            {
                m_order = " " + orderSQL;
            }
            return "select " + field + " from " + tableName + m_where + m_order + " limit {recordnum},{pagesize}";
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="tableName"></param>
        /// <param name="wheresql"></param>
        /// <param name="orderSQL"></param>
        /// <returns></returns>
        public string GetPageSQL2(string tableName, string wheresql, string orderSQL)
        {
            return "";
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="field"></param>
        /// <param name="tableName"></param>
        /// <param name="wheresql"></param>
        /// <param name="orderSQL"></param>
        /// <returns></returns>
        public string GetPageSQL2(string field, string tableName, string wheresql, string orderSQL)
        {
            return "";
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="Parameter"></param>
        /// <returns></returns>
        public bool ContainsData(string sql, object[] Parameter)
        {
            System.Data.DataSet ds = ReadData(sql, Parameter);
            if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
            {
                return true;
            }
            return false;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="Parameter"></param>
        /// <returns></returns>
        public System.Data.DataSet ReadData(string sql, object[] Parameter)
        {
            DataCommand cmd = myDb.SQL_cn.CreateCommand();
            cmd.Parameters.Clear();
            cmd.CommandTimeout = 300;
            if (Parameter != null)
            {
                for (int i = 0; i < Parameter.Length; i++)
                {
                    cmd.Parameters.Add(Parameter[i]);
                }
            }
            //cmd.Parameters.AddRange(Parameter);
            cmd.CommandText = sql;
            DataAdapter ad = new DataAdapter(cmd);
            System.Data.DataSet ds=new System.Data.DataSet();
            ad.Fill(ds);
            ad.Dispose();
            cmd.Parameters.Clear();
            cmd.Dispose();
            return ds;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="mySQL"></param>
        /// <returns></returns>
        public System.Data.DataSet ReadData(string sql, RyQuickSQL mySQL)
        {
            return ReadData(sql,GetParameter(mySQL));
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public System.Data.DataSet ReadData(string sql)
        {
            object[] Parameter = null;
            return ReadData(sql, Parameter);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="tableName"></param>
        /// <param name="id"></param>
        /// <returns></returns>
        public System.Data.DataSet ReadData(string tableName, string id)
        {
            object[] Parameter = null;
            return ReadData("select * from " + tableName + " where id=" + id, Parameter);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="Parameter"></param>
        /// <returns></returns>
        public int ExecuteNonQuery(string sql, object[] Parameter)
        {
            DataCommand cmd = myDb.SQL_cn.CreateCommand();
            cmd.Parameters.Clear();
            cmd.CommandTimeout = 300;
            if (Parameter!=null)
            cmd.Parameters.AddRange(Parameter);
            cmd.CommandText = sql;
            int i= cmd.ExecuteNonQuery();
            cmd.Parameters.Clear();
            cmd.Dispose();
            return i;
        }
        /// <summary>
        /// 执行SQL语句
        /// </summary>
        /// <param name="mySQL"></param>
        /// <param name="wheresql">只针对IsAdd为false才生效，where 以后的sql语句</param>
        /// <param name="IsAdd">是新增还是更新</param>
        /// <returns></returns>
        public int ExecuteNonQuery(RyQuickSQL mySQL, string wheresql, bool IsAdd)
        {
            if (IsAdd)
            {
                return ExecuteNonQuery(mySQL.GetInsertSQL(), mySQL);
            }
            else
            {
                if (wheresql.Length == 0) { return -1; }
                return ExecuteNonQuery(mySQL.GetUpdateSQL() + " where " + wheresql, mySQL);
            }
        }
        /// <summary>
        /// 插入数据库
        /// </summary>
        /// <param name="mySQL"></param>
        /// <returns></returns>
        public int Insert(RyQuickSQL mySQL)
        {
            return ExecuteNonQuery(mySQL.GetInsertSQL(), mySQL);
        }
        /// <summary>
        /// 更新数据库
        /// </summary>
        /// <param name="mySQL"></param>
        /// <param name="wheresql">where 以后的sql语句</param>
        /// <returns></returns>
        public int Update(RyQuickSQL mySQL, string wheresql)
        {
            if (wheresql.Length == 0) { return -1; }
            return ExecuteNonQuery(mySQL.GetUpdateSQL() + " where " + wheresql, mySQL);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="mySQL"></param>
        /// <returns></returns>
        public int ExecuteNonQuery(string sql, RyQuickSQL mySQL)
        {
            return ExecuteNonQuery(sql, GetParameter(mySQL));
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public int ExecuteNonQuery(string sql)
        {
            object[] pram = null;
            return ExecuteNonQuery(sql, pram);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="tableName"></param>
        /// <param name="id"></param>
        /// <returns></returns>
        public int DelById(string tableName, string id)
        {
            object[] param = null;
            return ExecuteNonQuery("delete from " + tableName + " where id=" + id, param);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="mySQL"></param>
        /// <returns></returns>
        public int CreateDb(RyQuickSQL mySQL)
        {
            string tmpSQL = "CREATE TABLE " + mySQL.TableName + " ([ID] INTEGER PRIMARY KEY,";
            for (int i = 0; i < mySQL.List.Count; i++)
            {
                SQLIitem item = (SQLIitem)mySQL.List[i];
                if (item.value is string)
                {
                    if (item.len == 0)
                    {
                        tmpSQL += "[" + item.Field + "] [nvarchar](max),";
                    }
                    else
                    { tmpSQL += "[" + item.Field + "] [nvarchar]("+ item.len + "),"; }
                }
                else if (item.value is int || item.value is Int64)
                {
                    tmpSQL += "[" + item.Field + "] [int] 0,";
                }
                else if (item.value is double || item.value is float)
                {
                    tmpSQL += "[" + item.Field + "] [float] 0,";
                }
                else if (item.value is DateTime)
                {
                    tmpSQL += "[" + item.Field + "] [DATETIME],";
                }
                else if (item.value is byte[])
                {
                    tmpSQL += "[" + item.Field + "] [LONGBLOB],";
                }
            }
            object[] param = null;
            return ExecuteNonQuery(tmpSQL.Substring(0, tmpSQL.Length - 1) + ")", param);
        }
        MySql.Data.MySqlClient.MySqlTransaction tr;
        /// <summary>
        /// 
        /// </summary>
        public void BeginTransaction()
        {
            tr = myDb.SQL_cn.BeginTransaction();
        }
        /// <summary>
        /// 
        /// </summary>
        public void Commit()
        {
            tr.Commit();
        }
        /// <summary>
        /// 
        /// </summary>
        public void Free()
        {
            list_param.Clear();
            myDb.CloseDb();
        }
    }
}