using HighWayIot.Log4net;
using HighWayIot.Plc.Impl;
using System;
using System.Collections.Generic;

namespace HighWayIot.Plc
{
    public sealed class PlcPool
    {
        private static readonly Lazy<PlcPool> lazy = new Lazy<PlcPool>(() => new PlcPool());
        public static PlcPool Instance
        {
            get
            {
                return lazy.Value;
            }
        }

        private LogHelper logHelper = LogHelper.Instance;

        private Dictionary<string, IPlc> keyValuePairs = new Dictionary<string, IPlc>();

        private PlcPool() { }

        /// <summary>
        /// 初始化Plc
        /// </summary>
        /// <param name="plcType"></param>
        /// <param name="ip"></param>
        /// <param name="port"></param>
        /// <param name="key"></param>
        public void InitPlc(string plcType, string ip, int port, string key)
        {
            IPlc _plc = null;
            switch (plcType)
            {
                case "InovancePlc":
                    _plc = new InovancePlc();
                    break;
                case "MelsecBinaryPlc":
                    _plc = new MelsecBinaryPlc();
                    break;
                case "OmronNJPlc":
                    _plc = new OmronNJPlc();
                    break;
                case "SiemensPlc":
                    _plc = new SiemensPlc();
                    break;
                default:
                    break;
            }
            var connectResult = _plc.Connect(ip, port);
            if (connectResult)
            {
                keyValuePairs.Add(key, _plc);
            }
        }

        /// <summary>
        /// 获取PLC
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public IPlc GetPlcByKey(string key)
        {
            return keyValuePairs[key];
        }

        /// <summary>
        /// 获取所有PLC信息
        /// </summary>
        /// <returns></returns>
        public Dictionary<string, IPlc> GetAll()
        {
            return keyValuePairs;
        }

        /// <summary>
        /// 关闭所有连接
        /// </summary>
        /// <returns></returns>
        public bool disConnectAll()
        {
            bool result = false;
            try
            {
                foreach (var kv in keyValuePairs)
                {
                    if (kv.Value != null)
                    {
                        kv.Value.DisConnect();
                    }
                }
                result = true;
            }
            catch (Exception ex)
            {
                logHelper.Error("关闭PLC连接异常", ex);
            }

            return result;
        }
    }
}