package com.ld.igds.protocol.beibo.grain.builder;

import com.ld.igds.protocol.beibo.grain.util.BeiboGrainServerUtils;
import com.ld.igds.util.BytesUtil;

/**
 * 根据接收到的信息进行封装
 *
 * @author czt
 */
public class ReMessageBuilder {

    private final static ReMessageBuilder instance = new ReMessageBuilder();

    private ReMessageBuilder() {
    }

    public static ReMessageBuilder getInstance() {
        return instance;
    }

    /**
     * @param strMsg
     * @return
     */
    public ReMessage buildMessage(String strMsg) {

        ReMessage message = new ReMessage();
        message.setStrMsg(strMsg);
        //设置起始符
        message.setStartStr(strMsg.substring(0, 9*2-1));

        //设置粮情分机地址
        String str = strMsg.substring(9*2-1, 10*2-1);
        int i = BytesUtil.hexToInt(str);
        String serId = String.valueOf(i - BeiboGrainServerUtils.BM);
        message.setSerId(serId);

        //粮情数据
        str = strMsg.substring(10*2-1, 1034*2 -1);
        message.setGrainStr(str);

        //温度数据
        str = strMsg.substring(1034*2 -1, 1052*2-1);
        message.setThStr(str);

        //扩充数据
        str = strMsg.substring(strMsg.length()-14*2, strMsg.length()-4*2);
        message.setExpand(str);

        //检验码
        str = strMsg.substring(strMsg.length()-4*2);
        message.setHexCrc16(str);

        return message;
    }
}