using System;
using System.Collections.Generic;
using System.Net.NetworkInformation;
using System.Text;
using System.Linq;
using System.Data;
using System.Threading;
using Mesnac.Action.Base;
using Mesnac.Controls.Base;
using System.Windows.Forms;
using Mesnac.Codd.Session;
using System.IO;
using Mesnac.Equips;
using Mesnac.Action.Feeding.Qingquan.Sys;

namespace Mesnac.Action.Feeding.Qingquan.BasicInfo
{
    /// <summary>
    /// 把PLCData表中PLC点的值写入PLC
    /// </summary>
    public class DatabaseToPlc
    {
        /// <summary>
        /// 获取本地连接
        /// </summary>
        /// <returns></returns>
        private DbHelper getLocalHelper()
        {
            return new DatabaseAction().NewDbHelper(Mesnac.Basic.DataSourceFactory.MCDbType.Local);
        }
        private class PlcData
        {
            public PlcData(string plcKey)
            {
                this.PlcKey = plcKey;
                this.PlcName = string.Empty;
                this.DataLen = 0;
                this.Data = new int[0];
            }
            public string PlcKey { get; private set; }
            public string PlcName { get; set; }
            public int DataLen { get; set; }
            public int[] Data { get; set; }
        }
        private string RowValue(object obj, string defaultValue)
        {
            string Result = defaultValue;
            if (obj != null && obj != DBNull.Value)
            {
                return obj.ToString();
            }
            return defaultValue;
        }
        private int RowValue(object obj, int defaultValue)
        {
            int Result = defaultValue;
            if (obj != null && obj != DBNull.Value && int.TryParse(obj.ToString(), out Result))
            {
                return Result;
            }
            return Result;
        }
        /// <summary>
        /// 把PLCData表中PLC点的值写入PLC业务入口
        /// </summary>
        /// <returns></returns>
        public bool Run()
        {
            //1、从PlCdata表中读取要写入PLC的数据项
            BaseAction action = new BaseAction();
            Dictionary<string, PlcData> plcDataLst = new Dictionary<string, PlcData>();
            DbHelper dbHelper = getLocalHelper();
            dbHelper.CommandType = CommandType.Text;
            dbHelper.CommandText = "SELECT * FROM PlcData ORDER BY ObjID";
            DataTable dt = dbHelper.ToDataTable();
            foreach (DataRow dr in dt.Rows)
            {
                string plcKey = RowValue(dr["EquipRunName"], string.Empty);
                PlcData plcData = null;
                if (plcDataLst.ContainsKey(plcKey))
                {
                    plcDataLst.TryGetValue(plcKey, out plcData);
                }
                else
                {
                    plcData = new PlcData(plcKey);
                    plcData.PlcName = RowValue(dr["EquipRunName"], string.Empty);
                    plcDataLst.Add(plcKey, plcData);
                }
                int ilen = RowValue(dr["PlcDataIndex"], 0) + 1;
                if (ilen > plcData.DataLen)
                {
                    plcData.DataLen = ilen;
                }
            }
            foreach (PlcData plcData in plcDataLst.Values)
            {
                plcData.Data = new int[plcData.DataLen];
            }
            foreach (DataRow dr in dt.Rows)
            {
                string plcKey = RowValue(dr["EquipRunName"], string.Empty);
                PlcData plcData = null;
                if (plcDataLst.ContainsKey(plcKey))
                {
                    plcDataLst.TryGetValue(plcKey, out plcData);
                }
                else
                {
                    plcData = new PlcData(plcKey);
                    plcData.PlcName = RowValue(dr["EquipRunName"], string.Empty);
                    plcDataLst.Add(plcKey, plcData);
                }

                int index = RowValue(dr["PlcDataIndex"], 0);
                plcData.Data[index] = RowValue(dr["PlcDataValue"], 0);
            }
            foreach (KeyValuePair<string, PlcData> plcData in plcDataLst)
            {
                BasicInfo.PlcData.DataKeyValue dataKey = null;
                if (string.IsNullOrWhiteSpace(plcData.Value.PlcName))
                {
                    dataKey = BasicInfo.PlcData.Instance.GetDataKeyValue(plcData.Key);
                    if (dataKey == null)
                    {
                        continue;
                    }
                }
                int[] data = plcData.Value.Data;
                int len = 0;
                const int onelen = 100;
                while (true)
                {
                    int sendlen = 0;
                    if (data.Length - len > onelen)
                    {
                        sendlen = onelen;
                    }
                    else
                    {
                        sendlen = data.Length - len;
                    }
                    if (sendlen <= 0)
                    {
                        break;
                    }
                    object[] downdata = new object[sendlen];
                    for (int i = 0; i < sendlen; i++)
                    {
                        downdata[i] = data[len + i];
                    }
                    if (dataKey != null)
                    {
                        if (!BasicInfo.PlcData.Instance.PlcWriteByDataKey(dataKey, len, downdata))
                        {
                            return false;
                        }
                    }
                    else
                    {
                        if (!BasicInfo.PlcData.Instance.PlcWriteByRunName(plcData.Value.PlcName, len, downdata))
                        {
                            return false;
                        }
                    }
                    len += sendlen;
                }
            }

            dbHelper.CommandText = "TRUNCATE TABLE PlcData";
            dbHelper.ExecuteNonQuery();
            return true;
        }
    }
}