using System;
using System.Net.Sockets;

namespace SWRIS.Models
{
    public class ClientState
    {
        public string SerialNo { get; set; }
        public string IpAddress { get; }
        public Socket ClientSocket { get; set; }
        public byte[] Buffer { get; set; }
        public ByteCircularBuffer ReceiveBuffer { get; set; } = new ByteCircularBuffer(32768); // 添加环形缓冲区
        public DateTime LastActiveTime { get; set; } = DateTime.UtcNow;
        /// <summary>
        /// 最近一次收到有效数据（心跳包或业务数据包）的时间，从未收到过为 DateTime.MinValue
        /// </summary>
        public DateTime LastDataReceivedTime { get; set; } = DateTime.MinValue;
        /// <summary>
        /// 数据激活状态：数据超时窗口内收到过有效数据。
        /// 用于区分"链路在收发数据但心跳缺失"与"链路真正静默"，
        /// 避免设备在持续上报实时数据时被判为离线。
        /// </summary>
        public bool IsDataActive { get; set; }
        /// <summary>
        /// 客户端是否已关闭，避免重复触发断开事件
        /// </summary>
        public bool IsClosed { get; set; }
        public ClientState(Socket clientSocket, string ipAddress, string serialNo)
        {
            ClientSocket = clientSocket;
            IpAddress = ipAddress;
            SerialNo = serialNo;
            Buffer = new byte[8192];
        }
        public ClientState(Socket clientSocket, string ipAddress)
        {
            ClientSocket = clientSocket;
            IpAddress = ipAddress;
            Buffer = new byte[8192];
        }
    }
}