using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Epost.DAL
{
    public class HistoryDataDAL
    {
         DataBaseOpration.OprationSqlDAL db = DB_DLL.GetInstance();

        #region 删除表名
        public bool DeleteTable(string table)
        {
            //执行删除语句
            string sql = "";
            if (table == "Ordershis")
            {
                sql = "delete from Ordershis where state!=3";
            }
            else
            {
                sql = "delete from {0}";
                sql = string.Format(sql, table);
            }


            //如果表中数据为空
            string sql1 = "select count(*) from {0}";
            sql1 = string.Format(sql1, table);
            DataTable dt = db.GetsqlForDT(sql1);
            int y = Convert.ToInt32(dt.Rows[0][0].ToString());
            if (y == 0)
            {
                return true;
            }
            else
            {
                int x = db.InsertSql(sql);
                if (x > 0)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }




        }
        #endregion


        #region 保存删除时间(数据库数据)
        public bool SaveTime(String table, string date)
        {
            int x = -1;
            string sql = "alter proceduce proceduce_delete " +
                "as delete from {0} where {1}<DATEADD(DAY,{2} GETDATE()) go " +
                "Execute proceduce_delete";
            if (table == "Error")
            {
                sql = string.Format(sql, table, "date", Convert.ToInt32(date) * (-1), "GETDATE()");
            }
            else if (table == "Orders")
            {
                sql = string.Format(sql, table, "downdate", Convert.ToInt32(date) * (-1), "GETDATE()");
            }
            //GetsqlForDT
            x = db.InsertSql(sql);
            if (x != -1)
            {
                return true;
            }
            else
            {
                return false;
            }


        }
        #endregion


        #region 查询历史数据
        public DataTable HistoryData()
        {
            string sql = "exec sys_viewtablespace";

            DataTable dt = db.GetsqlForDT(sql);
            return dt;
        }
        #endregion
    }
}