using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using NewLife;
using NewLife.Data;
using NewLife.Log;
using NewLife.Model;
using NewLife.Net;
using NewLife.Net.Handlers;
using NewLife.Reflection;
using NewLife.Serialization;
using OPC_Client;

namespace ScadaTcpService
{
    public class ScadaService
    {

        private static Scada _scada;
        private static TcpServer _tcpServer;
        internal static ConcurrentDictionary<int, bool> InitDic = new ConcurrentDictionary<int, bool>();
        public static void Start()
        {
            var port = ConfigurationManager.AppSettings["Port"].ToInt();
            _tcpServer = new TcpServer
            {
                Port = port,
                Log = XTrace.Log,
                SessionLog = XTrace.Log
            };
            _tcpServer.Add<StandardCodec>();
            _tcpServer.Start();
            CreateScada();
         
        }


        public static void Stop()
        {
            _scada.Stop();
            _tcpServer.Stop("");
        }

        public static List<Data> GetAllData()
        {
            return _scada.GetAllData();
        }

        private static void CreateScada()
        {
            try
            {
                var serverName = ConfigurationManager.AppSettings["ServerName"];
                var pointFile = ConfigurationManager.AppSettings["PointFile"];
                _scada = new Scada(serverName, pointFile);
                _scada.ChangeEvent += (data, changeItems) =>
                {
                    var dataList =
                        data.Where(c => changeItems.Contains(c.Key))
                            .Select(c => new
                            {
                                c.Value.dataType,
                                c.Value.itemID,
                                c.Value.timeStamp,
                                c.Value.batchNum,
                                c.Value.id,
                                c.Value.quality,
                                c.Value.DateTime1,
                                c.Value.value
                            })
                            .ToList();
                    var sendData = new
                    {
                        cmd = "sendData",
                        data = dataList
                    };
                    if (_tcpServer.SessionCount >= 1)
                    {
                        foreach (var item in InitDic.Where(c => c.Value))
                        {
                            _tcpServer.GetSession(item.Key)?.SendMessage(new Packet(sendData.ToJson().GetBytes()));
                        }


                    }
                    Console.WriteLine($"共改变{changeItems.Count}条数据");
                };
                _scada.Start();
            }
            catch (Exception e)
            {
                XTrace.WriteException(e);
            }
        }


    }
    /// <summary>定义服务端，用于管理所有网络会话</summary>
    internal class TcpServer : NetServer<TcpSession>
    {

    }

    /// <summary>定义会话。每一个远程连接唯一对应一个网络会话，再次重复收发信息</summary>
    internal class TcpSession : NetSession<TcpServer>
    {
        protected override void OnConnected()
        {
            if (!ScadaService.InitDic.ContainsKey(ID))
                ScadaService.InitDic.TryAdd(ID, false);
            var data = new
            {
                cmd = "getAllData",
                data = ScadaService.GetAllData().Select(c => new
                {
                    c.dataType,
                    c.itemID,
                    c.timeStamp,
                    c.batchNum,
                    c.id,
                    c.quality,
                    c.DateTime1,
                    c.value
                }).ToList()
            };
            SendMessage(new Packet(data.ToJson().GetBytes()));
            base.OnConnected();
        }

        protected override void OnDisconnected(string reason)
        {
            if (ScadaService.InitDic.ContainsKey(ID))
                ScadaService.InitDic.Remove(ID);
            base.OnDisconnected(reason);
        }

        protected override void OnReceive(ReceivedEventArgs e)
        {
            if (e.Message is Packet pk)
            {
                if (pk.ToStr().ToLower().Contains("start") != true) return;
                if (ScadaService.InitDic.ContainsKey(ID))
                    ScadaService.InitDic[ID] = true;
            }
               
        }
    }
}