using System;
using System.IO;
using System.Text;
using System.Data;
using Mesnac.Equips;
using Mesnac.Equips.BaseInfo;
using System.Runtime.InteropServices;
using Mesnac.Codd.Session;

namespace Mesnac.Equip.FictitiousPlc.SqlitePlc.Default
{
    public class Equip : BaseEquip
    {
        #region 执行函数
        private bool isOpened = false;
        private bool eOpen()
        {
            if (isOpened)
            {
                return true;
            }
            DbHelper dbHelper = DbHelperFactory.Instance.NewDbHelper();
            string sqlstr = "select tbl_name from sqlite_master where type='table' limit 1";
            dbHelper.CommandText = sqlstr;
            object obj = dbHelper.ToScalar();
            if (obj != null && obj != DBNull.Value)
            {
                isOpened = true;
            }
            return isOpened;
        }
        private bool eRead(string block, int start, int len, out object[] buff)
        {
            string fileName = "N" + block.Trim();
            buff = new object[len];
            DbHelper dbHelper = DbHelperFactory.Instance.NewDbHelper();
            string sqlstr = "SELECT DataFile FROM NDATA WHERE DataFileName='" + fileName + "'";
            dbHelper.CommandText = sqlstr;
            object obj = dbHelper.ToScalar();
            if (obj == null || obj == DBNull.Value)
            {
                return false;
            }
            string[] ss = obj.ToString().Split(',');
            for (int i = 0; i < buff.Length; i++)
            {
                buff[i] = Convert.ToInt32(ss[start + i]);
            }
            return true;
        }
        private bool eWrite(int block, int start, object[] buff)
        {
            string fileName = "N" + block.ToString();
            DbHelper dbHelper = DbHelperFactory.Instance.NewDbHelper();
            string sqlstr = "SELECT DataFile FROM NDATA WHERE DataFileName='" + fileName + "'";
            dbHelper.CommandText = sqlstr;
            object obj = dbHelper.ToScalar();
            if (obj == null || obj == DBNull.Value)
            {
                return false;
            }
            string[] ss = obj.ToString().Split(',');
            if (ss.Length < start + buff.Length)
            {
                return false;
            }
            for (int i = 0; i < buff.Length; i++)
            {
                ss[start + i] = buff[i].ToString();
            }
            StringBuilder sqlsb = new StringBuilder();
            for (int d = 0; d < ss.Length; d++)
            {
                if (d == ss.Length - 1)
                {
                    sqlsb.Append(ss[d]);
                }
                else
                {
                    sqlsb.Append(ss[d]).Append(",");
                }
            }
            sqlstr = "UPDATE NDATA SET DataFile=@DataFile WHERE DataFileName=@DataFileName";
            dbHelper.CommandType = CommandType.Text;
            dbHelper.CommandText = sqlstr;
            dbHelper.ClearParameter();
            dbHelper.AddParameter("@DataFile", sqlsb.ToString());
            dbHelper.AddParameter("@DataFileName", fileName);
            dbHelper.ExecuteNonQuery();
            return true;
        }
        private void eClose()
        {

        }
        #endregion
        #region BaseEquip 实现函数
        public override bool Open()
        {
            base.State = eOpen();
            return base.State;
        }
        public override bool Read(string block, int start, int len, out object[] buff)
        {
            bool Result = false; buff = new object[len];
            try
            {
                Result = eRead(block, start, len, out buff);
                base.State = Result;
                return Result;
            }
            catch(Exception ex)
            {
                ICSharpCode.Core.LoggingService.Error(String.Format("读取SQLite设备变量失败!-({0})", ex.Message));
                //ICSharpCode.Core.LoggingService.Error(ex.StackTrace);
                base.State = false;
                return false;
            }
        }
        public override bool Write(int block, int start, object[] buff)
        {
            bool Result = false;
            try
            {
                Result = eWrite(block, start, buff);
                return Result;
            }
            catch(Exception ex)
            {
                ICSharpCode.Core.LoggingService.Error(String.Format("写入SQLite设备变量失败!-({0})", ex.Message));
                //ICSharpCode.Core.LoggingService.Error(ex.StackTrace);
                return false;
            }
        }
        public override void Close()
        {
            this.State = false;
            eClose();
        }
        #endregion
    }
}