using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web;
using OPCAutomation;
using Webservice;

namespace WebService
{
    public class OPCHelper
    {
        #region 变量

        public string strHostIP;
        public string strHostName;
        public OPCServer opcServer;
        public OPCGroups opcGroups;
        public OPCGroup opcGroup1;
        public OPCItems opcItems1;
        public OPCItem[] opcItemm1;

        public OPCGroup opcGroup2;
        public OPCItems opcItems2;
        public OPCItem[] opcItemm2;

        public OPCGroup opcGroup3;
        public OPCItems opcItems3;
        public OPCItem[] opcItemm3;

        public OPCGroup opcGroup4;
        public OPCItems opcItems4;
        public OPCItem[] opcItemm4;

        public OPCGroup opcGroup5;
        public OPCItems opcItems5;
        public OPCItem[] opcItemm5;

        public string[] ItemIDs;
        object ItemValues;
        object Qualities;
        object TimeStamps;
        public bool Connected = false;

        #endregion

        public bool CreateServer()
        {
            try
            {
                opcServer = new OPCServer();
            }
            catch (Exception ex)
            {
                LogHelper.WriteErrLogBase(ex.ToString(), MethodBase.GetCurrentMethod().Name);
                return false;
            }
            return true;
        }

        public bool ConnectServer(string strHostIP, string strHostName)
        {
            try
            {
                opcServer.Connect(strHostName, strHostIP);
            }
            catch (Exception ex)
            {
                LogHelper.WriteErrLogBase(ex.ToString(), MethodBase.GetCurrentMethod().Name);
                return false;
            }
            return true;
        }

        public void SetGroupProperty(OPCGroup opcGroup, int updateRate)
        {
            opcGroup.IsActive = true;
            opcGroup.DeadBand = 0;
            opcGroup.UpdateRate = updateRate;
            opcGroup.IsSubscribed = true;
        }

        public object ReadSingleValueFromOPC(OPCItem[] item, int i)
        {
            object ItemValues;
            object Qualities;
            object TimeStamps;

            item[i].Read(1, out ItemValues, out Qualities, out TimeStamps);

            if ((ItemValues != null) && (Qualities.ToString() != "Good"))
            {
                return ItemValues.ToString();
            }
            return null;
        }

        public bool Disconnect()
        {
            try
            {
                opcServer.OPCGroups.RemoveAll();
                opcServer.Disconnect();
                return true;
            }
            catch (Exception ex)
            {
                LogHelper.WriteErrLogBase(ex.ToString(), MethodBase.GetCurrentMethod().Name);
                return false;
            }
        }
    }
}