package org.yzh.protocol.t808.T8900Lock;

import io.github.yezhihao.protostar.annotation.Field;
import lombok.Data;
//import org.yzh.commons.util.BytesUtils;

/**
 * 蝶阀锁协议数据结构
 * 格式: aa aa 02 cc bb
 */
@Data
public class ValveLockProtocol {

    public static final Integer key = 0x41;

    @Field(desc = "锁ID", length = 2)
    private byte[] lockId;

    @Field(desc = "固定值", length = 1)
    private final byte fixedValue = 0x02;

    @Field(desc = "锁芯状态", length = 1)
    private byte status;

    @Field(desc = "校验和", length = 1)
    private byte checksum;

    // 锁状态常量
    public static final byte STATUS_OPEN = 0x01;  // 开锁状态
    public static final byte STATUS_CLOSE = 0x02; // 关锁状态

    /**
     * 计算校验和：(aa + aa + 02 + cc) & 0xFF
     */
    public void calculateChecksum() {
        int sum = lockId[0] & 0xFF;
        sum += lockId[1] & 0xFF;
        sum += fixedValue & 0xFF;
        sum += status & 0xFF;
        this.checksum = (byte) (sum & 0xFF); // 取低8位
    }

    /**
     * 验证校验和
     */
    public boolean verifyChecksum() {
        int sum = lockId[0] & 0xFF;
        sum += lockId[1] & 0xFF;
        sum += fixedValue & 0xFF;
        sum += status & 0xFF;
        byte expected = (byte) (sum & 0xFF);
        return expected == checksum;
    }

//    /**
//     * 从16进制字符串创建锁ID
//     */
//    public static byte[] createLockId(String hexString) {
//        return BytesUtils.hex2bytes(hexString);
//    }
}