using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using BatCharging.Model;

namespace BatCharging.Service
{
    /// <summary>
    /// 解包基础的ASDU字节列表
    /// </summary>
    public class MsgHeadAsduDecoder
    {
        /// <summary>
        /// 解包基础的ASDU字节数组
        /// </summary>
        /// <param name="msgRecv">接收到字节数组</param>
        /// <returns>ASDU消息</returns>
        public static ASDU GetBaseASDUMsg(byte[] msgRecv)
        {
            ASDU msgResult = null;
            if(msgRecv != null)
            {
                int num=msgRecv.Length;
                if(num > 15)
                {
                    msgResult = new ASDU
                    {
                        FrameTypeNo = msgRecv[15],
                        MsgBodyCount = msgRecv[16],
                        TransReason = BitConverter.ToUInt16(msgRecv,17),
                        PublicAddr = ByteUtils.ToUInt16(msgRecv, 19),
                        MsgBodyAddr = msgRecv.Skip(21).Take(3).ToArray(),
                        MsgBodyContents = msgRecv.Skip(24).ToArray()
                    };
                }
            }
            else
            {
                return null;
            }
            return msgResult;
        }



    }
}