using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OPCAutomation;
using System.Net;
using System.IO;
using System.Data;
using System.Threading;

namespace OPCPLC
{
    public class OPCPLCAutomation
    {
        /// <summary>
        /// OPCServer Object
        /// </summary>
        public OPCServer KepServer;
        /// <summary>
        /// OPCGroups Object
        /// </summary>
        public OPCGroups KepGroups;
        /// <summary>
        /// OPCGroup Object
        /// </summary>
        public OPCGroup KepGroup;
        /// <summary>
        /// OPCItems Object
        /// </summary>
        public OPCItems KepItems;
        /// <summary>
        /// OPCItem Object
        /// </summary>
        public OPCItem KepItem;
        /// <summary>
        /// 客户端句柄
        /// </summary>
        int itmHandleClient = 1234;
        /// <summary>
        /// 存放服务端句柄
        /// </summary>
        public Dictionary<string, int> dirHandleServer = new Dictionary<string, int>();

        /// <summary>
        /// 枚举本地OPC服务器
        /// </summary>
        public object GetListOPCServers()
        {
            //获取本地计算机上的OPCServerName
            try
            {
                KepServer = new OPCServer();
                object serverList = KepServer.GetOPCServers();
                return serverList;
            }
            catch (Exception ex)
            {
                throw ex;
            }

        }

        /// <summary>
        /// 枚举本地OPC服务器
        /// </summary>
        public object GetListOPCServers(string strHostIP)
        {
            //获取本地计算机上的OPCServerName
            try
            {
                KepServer = new OPCServer();
                object serverList = KepServer.GetOPCServers(strHostIP);
                return serverList;
            }
            catch (Exception ex)
            {
                throw ex;
            }

        }
        /// <summary>
        /// 连接OPC服务器
        /// </summary>
        /// <param name="remoteServerIP">OPCServerIP</param>
        /// <param name="remoteServerName">OPCServer名称</param>
        public bool ConnectRemoteServer(string remoteServerName, string remoteServerIP)
        {
            try
            {
                KepServer.Connect(remoteServerName, remoteServerIP);

                if (KepServer.ServerState == (int)OPCServerState.OPCRunning)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch (Exception ex)
            {
                return false;
            }
        }
        /// <summary>
        /// 取消连接OPC服务器
        /// </summary>
        /// <param name="remoteServerIP">OPCServerIP</param>
        /// <param name="remoteServerName">OPCServer名称</param>
        public bool DisconnectConnectRemoteServer()
        {
            try
            {
                if (KepServer.ServerState == (int)OPCServerState.OPCRunning && KepServer != null)
                {
                    KepServer.Disconnect();
                    KepServer = null;
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch (Exception ex)
            {
                return false;
            }
        }

        /// <summary>
        /// 创建组
        /// </summary>
        /// <param name="groupname">组的名称</param>
        /// <returns></returns>
        public OPCGroup CreateGroup(string groupname)
        {
            try
            {
                KepGroups = KepServer.OPCGroups;
                KepGroup = KepGroups.Add(groupname);
                KepItems = KepGroup.OPCItems;
                return KepGroup;
            }
            catch (Exception err)
            {
                return null;
            }
        }

        /// <summary>
        /// 移除组
        /// </summary>
        /// <param name="groupname">组的名称</param>
        /// <returns></returns>
        public void RemoveGroup(string groupname)
        {
            try
            {
                KepServer.OPCGroups.Remove(groupname);
            }
            catch (Exception)
            {
            }
        }
        /// <summary>
        /// 设置组属性
        /// </summary>
        public void SetGroupProperty()
        {
            KepServer.OPCGroups.DefaultGroupIsActive = true;
            KepServer.OPCGroups.DefaultGroupDeadband = 0;
            KepGroup.IsActive = true;
            KepGroup.IsSubscribed = true;
        }
        /// <summary>
        /// 向OPC中添加地址项
        /// </summary>
        /// <param name="itemname">地址项名称</param>
        /// <returns></returns>
        public int AddKepItem(string itemname)
        {
            KepItem = KepGroup.OPCItems.AddItem(itemname, itmHandleClient);
            dirHandleServer.Add(itemname, KepItem.ServerHandle);
            return KepItem.ServerHandle;
        }

        /// <summary>
        /// 向OPC中添加地址项
        /// </summary>
        /// <param name="itemname">地址项名称</param>
        /// <param name="clientHandleValue">客户端数据</param>
        /// <returns></returns>
        public int AddKepItem(string itemname, int clientHandleValue)
        {
            KepItem = KepGroup.OPCItems.AddItem(itemname, clientHandleValue);
            dirHandleServer.Add(itemname, KepItem.ServerHandle);
            return KepItem.ServerHandle;
        }

        /// <summary>
        /// 向OPC中添加连续添加多个地址项
        /// </summary>
        /// <param name="NumItems">添加地址的个数</param>
        /// <param name="ItmeIds">添加连续地址的字符数组</param>
        /// <param name="ClientHandles">添加连续地址的字符数组句柄</param>
        /// <param name="ServerHandles">返回连续地址服务句柄</param>
        /// <param name="Errors">返回错误信息</param>
        public void AddKepItems(int NumItems, ref Array ItmeIds, ref Array ClientHandles, out Array ServerHandles, out Array Errors)
        {
            KepGroup.OPCItems.AddItems(NumItems, ref ItmeIds, ref ClientHandles, out ServerHandles, out Errors);
            for (int i = 1; i <= ServerHandles.Length; i++)
            {
                dirHandleServer.Add(ItmeIds.GetValue(i).ToString(), int.Parse(ServerHandles.GetValue(i).ToString()));
            }
        }

        /// <summary>
        /// 移除地址项
        /// </summary>
        /// <returns></returns>
        public void RemoveKepItems()
        {
            int NumItems = dirHandleServer.Count;
            Array Errors;
            int[] handle = new int[NumItems + 1];
            int index = 0;
            handle[index] = 0;
            foreach (KeyValuePair<string, int> kvp in dirHandleServer)
            {
                index++;
                handle[index] = kvp.Value;
            }
            Array ServerHandle = handle.ToArray();
            KepGroup.OPCItems.Remove(NumItems, ref ServerHandle, out Errors);
        }
        /// <summary>
        /// 读取一个地址项的值
        /// </summary>
        /// <param name="p_itmHandleServer">地方服务句柄</param>
        /// <returns>返回读取的值</returns>
        public object ReadtagValue(int p_itmHandleServer)
        {
            int sumValue = 0;
            try
            {
                OPCItem bItem = KepGroup.OPCItems.GetOPCItem(p_itmHandleServer);//KepItems.GetOPCItem( itmHandleServer1 );
                int[] temp = new int[2] { 0, bItem.ServerHandle };
                Array serverHandles = (Array)temp;
                object[] valueTemp = new object[2] { "", "0" };
                Array values = (Array)valueTemp;
                Array Errors;
                object quer;
                object tiems;
                KepGroup.SyncRead(1, 1, ref serverHandles, out values, out Errors, out quer, out tiems);
                GC.Collect();
                sumValue = values.Length;
                return values.GetValue(1);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {

            }
        }
        /// <summary>
        /// 释放资源处理的事情
        /// </summary>
        public void ReleaseResource()
        {
            try
            {
                if (KepServer != null)
                {
                    KepServer.Disconnect();
                    KepServer = null;
                }
            }
            catch
            {
            }
        }

        /// <summary>
        /// 设置数据更新的频率
        /// </summary>
        /// <param name="setupdaterate"></param>
        public void SetUpdateRate(int setupdaterate)
        {
            if (KepGroup != null)
            {
                KepGroup.UpdateRate = setupdaterate;
            }
        }
        /// <summary>
        /// 获取数据更新的频率
        /// </summary>
        /// <returns></returns>
        public int GetUpdateRate()
        {
            return KepGroup.UpdateRate;
        }
        /// <summary>
        /// 向指定的地址项写入指定的值
        /// </summary>
        /// <param name="p_itmHandleServer">地址服务句柄</param>
        /// <param name="obj">要写入的值</param>
        public void WritetagValue(int p_itmHandleServer, object obj)
        {
            try
            {
                OPCItem bItem = KepGroup.OPCItems.GetOPCItem(p_itmHandleServer);
                int[] temp = new int[2] { 0, bItem.ServerHandle };
                Array serverHandles = (Array)temp;
                object[] valueTemp = new object[2] { "", obj };
                Array values = (Array)valueTemp;
                Array Errors;
                KepGroup.SyncWrite(1, ref serverHandles, ref values, out Errors);
                GC.Collect();
            }
            catch (Exception ex)
            {
            }
            finally
            {
            }
        }

        /// <summary>
        /// 向指定的地址项写入指定的值,不触发订阅
        /// </summary>
        /// <param name="p_itmHandleServer">地址服务句柄</param>
        /// <param name="obj">要写入的值</param>
        public void OPCItemWritetagValue(int p_itmHandleServer, object obj)
        {
            try
            {
                OPCItem bItem = KepGroup.OPCItems.GetOPCItem(p_itmHandleServer);
                //int[] temp = new int[2] { 0, bItem.ServerHandle };
                //Array serverHandles = (Array)temp;
                //object[] valueTemp = new object[2] { "", obj };
                //Array values = (Array)valueTemp;
                //Array Errors;
                //这句也可以写入，但并不触发写入事件
                bItem.Write(obj);
                GC.Collect();
            }
            catch (Exception ex)
            {
            }
            finally
            {
            }
        }


    }
}