using HslCommunication.Profinet.Siemens;
using Infrastructure;
using MiniExcelLibs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DOAN.Infrastructure.PLC
{
    public class PLCTool
    {
        // 私有连接对象
        private SiemensS7Net siemensTcpNet = null;
        private readonly string plcAddress;
        private const int ReconnectDelayMs = 5000;
        
        public PLCTool()
        {
            plcAddress = AppSettings.GetConfig("PLCConfig:Address");
            this.siemensTcpNet = new SiemensS7Net(SiemensPLCS.S200Smart, plcAddress)
            {
                ConnectTimeOut = 5000
            };
        }

        /// <summary>
        /// 尝试连接到PLC
        /// </summary>
        /// <returns>连接成功返回true，失败返回false</returns>
        public bool ConnectPLC()
        {
            try
            {
                var connect = siemensTcpNet.ConnectServer();
                if (connect.IsSuccess)
                {
                    Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接成功,地址{plcAddress}");
                    return true;
                }
                else
                {
                    Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接失败,地址{plcAddress}: {connect.Message}");
                    return false;
                }
            }
            catch (Exception e)
            {
                Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接失败,地址{plcAddress}: {e.Message}");
                return false;
            }
        }
        
        /// <summary>
        /// 检查PLC连接状态
        /// </summary>
        /// <returns>连接正常返回true，否则返回false</returns>
        public bool IsConnected()
        {
            try
            {
                // 尝试读取一个字节来检查连接状态
                var result = siemensTcpNet.Read("VB100", 1);
                if (!result.IsSuccess)
                {
                    Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接状态检查失败: {result.Message}");
                }
                return result.IsSuccess;
            }
            catch (Exception ex)
            {
                Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接状态检查异常: {ex.Message}");
                return false;
            }
        }
        
        /// <summary>
        /// 重连PLC
        /// </summary>
        /// <returns>重连成功返回true，失败返回false</returns>
        public bool ReconnectPLC()
        {
            Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] 尝试重新连接PLC...");
            
            // 先关闭现有连接
            ConnectClose();
            
            // 重新创建PLC对象
            this.siemensTcpNet = new SiemensS7Net(SiemensPLCS.S200Smart, plcAddress)
            {
                ConnectTimeOut = 5000
            };            
            
            // 持续尝试重新连接，直到成功
            int attempt = 0;
            while (true)
            {
                attempt++;
                if (ConnectPLC())
                {
                    Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC重连成功，尝试次数: {attempt}");
                    return true;
                }
                
                Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC重连失败，尝试次数: {attempt}");
                System.Threading.Thread.Sleep(ReconnectDelayMs);
            }
        }

        /// <summary>
        /// 向PLC写入单个bit值
        /// </summary>
        /// <param name="addr">PLC地址</param>
        /// <param name="value">要写入的bool值</param>
        /// <returns>写入成功返回true，失败返回false</returns>
        public bool WriteBit(string addr, bool value)
        {
            var write = siemensTcpNet.Write(addr, value);
            return write.IsSuccess;
        }

        /// <summary>
        /// 从PLC读取单个bit值
        /// </summary>
        /// <param name="addr">PLC地址</param>
        /// <returns>读取到的bool值</returns>
        public bool ReadBit(string addr)
        {
            return siemensTcpNet.ReadBool(addr).Content;
        }

        /// <summary>
        /// 从PLC读取多个连续的二进制数据并转为字节数组
        /// </summary>
        /// <param name="addr">起始PLC地址，默认为"VB100"</param>
        /// <param name="length">要读取的字节数，默认为12</param>
        /// <returns>读取到的字节数组，如果失败返回null</returns>
        public byte[] ReadAllValue(string addr = "VB100", ushort length = 12)
        {
            var result = siemensTcpNet.Read(addr, length);
            if (result.IsSuccess)
            {
                return result.Content;
            }
            else
            {
                Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC IO 取值失败,PLC地址{plcAddress},访问地址为{addr}，地址个数为{length}");
                return null;
            }
        }

        /// <summary>
        /// 关闭与PLC的连接
        /// </summary>
        public void ConnectClose()
        {
            siemensTcpNet.ConnectClose();
        }
    }
}