using System;

namespace HslCommunication.Core.IMessage
{
    /// <summary>
    /// 旧版的机器人的消息类对象，保留此类为了实现兼容
    /// </summary>
    public class EFORTMessagePrevious : INetMessage
    {
        /// <summary>
        /// 消息头的指令长度
        /// </summary>
        public int ProtocolHeadBytesLength
        {
            get { return 17; }
        }

        /// <summary>
        /// 从当前的头子节文件中提取出接下来需要接收的数据长度
        /// </summary>
        /// <returns>返回接下来的数据内容长度</returns>
        public int GetContentLengthByHeadBytes()
        {
            return BitConverter.ToInt16(HeadBytes, 15) - 17;
        }

        /// <summary>
        /// 检查头子节的合法性
        /// </summary>
        /// <param name="token">特殊的令牌，有些特殊消息的验证</param>
        /// <returns>是否合法</returns>
        public bool CheckHeadBytesLegal(byte[] token)
        {
            if (HeadBytes == null) return false;
            return true;
        }

        /// <summary>
        /// 获取头子节里的消息标识
        /// </summary>
        /// <returns>标识信息</returns>
        public int GetHeadBytesIdentity()
        {
            return 0;
        }

        /// <summary>
        /// 消息头字节
        /// </summary>
        public byte[] HeadBytes { get; set; }

        /// <summary>
        /// 消息内容字节
        /// </summary>
        public byte[] ContentBytes { get; set; }

        /// <summary>
        /// 发送的字节信息
        /// </summary>
        public byte[] SendBytes { get; set; }
    }
}