package com.ard.tianyu.netty.handler;// MessageProtocolEncoder.java

import com.ard.tianyu.netty.command.BaseCommand;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;
import lombok.extern.slf4j.Slf4j;

import java.util.Arrays;

@Slf4j
public class MessageProtocolEncoder extends MessageToByteEncoder<BaseCommand> {
    @Override
    protected void encode(ChannelHandlerContext ctx, BaseCommand command, ByteBuf out) throws Exception {
        out.writeShort(command.getDataHeader()); // 写入帧头
        out.writeShort(command.getDataLength()); // 写入数据长度
        if(command.getBoxSn() != null) {
            out.writeBytes(command.getBoxSn());
        }// 写入指令编号
        out.writeByte(command.getCmdCode()); // 写入指令编号
        command.encode(out); // 编码具体负载
        // 打印
        if(command.getCmdCode()!=0x02) {
            printHex(out);
        }
    }
    private void printHex(ByteBuf out)
    {
        // 打印编码后的字节数组
        byte[] encodedBytes = new byte[out.readableBytes()]; // 创建字节数组，大小为可读字节数
        out.getBytes(out.readerIndex(), encodedBytes); // 读取ByteBuf中的字节到字节数组中
        // log.warn("Encoded message bytes: {}", Arrays.toString(encodedBytes));
        // 将字节数组转换为十六进制格式
        StringBuilder hexString = new StringBuilder();
        for (byte b : encodedBytes) {
            hexString.append(String.format("%02X ", b)); // 将每个字节转换为两位十六进制并加上空格
        }

        log.warn("Encoded message in hex: {}", hexString.toString().trim());
    }
}