package com.jsowell.netty.domain;

import com.jsowell.common.util.BytesUtil;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.extern.slf4j.Slf4j;

import java.util.Arrays;

@Slf4j
@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class ChargingPileMessage {
    private String header; // 包头 (3字节)
    private int length; // 长度 (2字节)
    private int physicalId; // 物理ID (4字节)
    private int messageId; // 消息ID (2字节)
    private byte command; // 命令 (1字节)
    private byte[] data; // 数据 (n字节)
    private int checksum; // 校验 (2字节)

    // 从字节数组解析消息
    public static ChargingPileMessage parseMessage(byte[] messageBytes) {
        log.info("parseMessage:{}", BytesUtil.binary(messageBytes, 16));
        String header = new String(Arrays.copyOfRange(messageBytes, 0, 3));

        int length = ((messageBytes[3] & 0xFF) << 8) | (messageBytes[4] & 0xFF);

        int physicalId = ((messageBytes[5] & 0xFF) << 24) | ((messageBytes[6] & 0xFF) << 16) |
                ((messageBytes[7] & 0xFF) << 8) | (messageBytes[8] & 0xFF);

        int messageId = ((messageBytes[9] & 0xFF) << 8) | (messageBytes[10] & 0xFF);

        byte command = messageBytes[11];

        byte[] data = Arrays.copyOfRange(messageBytes, 12, messageBytes.length - 2);

        int checksum = ((messageBytes[messageBytes.length - 2] & 0xFF) << 8) | (messageBytes[messageBytes.length - 1] & 0xFF);

        return new ChargingPileMessage(header, length, physicalId, messageId, command, data, checksum);
    }
}