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

namespace BatCharging.Service
{
    /// <summary>
    /// 心跳包报文封装
    /// </summary>
    public class MsgHeartResEncoder
    {
        /// <summary>
        /// 获取监控平台应答心跳报文字节数组
        /// </summary>
        /// <returns></returns>
        public byte[] GetMsgPackHeartRes(byte[] destAddr)
        {
            try
            {
                byte[] result = null;

                APCI headAPCI = new APCI();
                headAPCI.StartChar = CmnChargerConst.APCI_START_CHAR;
                headAPCI.PackLen = 0;  //临时赋值为零,具体数值看下面的计算结果
                headAPCI.CtlArea = 0;  //控制域
                                       //目的地址
                headAPCI.DestAddr = destAddr;
                //源地址，本系统中，源地址统一为：00000000（即为0）
                headAPCI.SrcAddr = 0;

                byte randomNum = CmnChargerParam.GetByteRandomNum();

                ASDU headASDU = new ASDU();
                headASDU.FrameTypeNo = 45;   //帧类型号
                headASDU.MsgBodyCount = 0;   //信息体个数
                headASDU.TransReason = 4;    //传送原因
                headASDU.PublicAddr = 0;     //公共地址
                headASDU.MsgBodyAddr = new byte[] { 0, 0, 0 };  //信息体地址

                HeartBeatRes heartBeat = new HeartBeatRes();
                heartBeat.RecordType = 14;
                heartBeat.Result = 0;

                headASDU.MsgBodyContents = GetMsgContents(heartBeat);          //信息体
                headAPCI.PackLen = Convert.ToUInt16(24 + headASDU.MsgBodyContents.Length);  //报文长度

                List<byte> lstResult = MsgHeadApciEncoder.BuildBaseAPCI(headAPCI);
                lstResult.AddRange(MsgHeadAsduEncoder.BuildBaseASDU(headASDU).ToArray());

                result = lstResult.ToArray();
                return result;
            }
            catch (Exception ex)
            {
                ex.ToString();
                return null;
            }


        }

        /// <summary>
        /// 获取心跳回复消息体字节数组
        /// </summary>
        /// <param name="auth"></param>
        /// <returns>心跳回复消息体字节数组</returns>
        private byte[] GetMsgContents(HeartBeatRes heartBeat)
        {
            byte[] results = null;
            if (heartBeat != null)
            {
                List<byte> lstContent = new List<byte>();
                lstContent.Add(heartBeat.RecordType);
                lstContent.Add(heartBeat.Result);

                results = lstContent.ToArray();
            }
            return results;
        }
    }
}