package com.dji.sample.droneairport.utils;

import com.dji.sample.droneairport.utils.SM2.ModeTypeEnum;
import com.dji.sample.droneairport.utils.SM2.Utils;
import com.dji.sample.territory.utils.SM2SignUtil;
import com.dji.sample.territory.utils.jym.SM2SignVO;
import com.dji.sample.territory.utils.jym.SM2SignVerUtils;
import com.dji.sample.territory.utils.jym.Util;
import lombok.SneakyThrows;

import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class AuthUtil {

    /**
     * 国土调查云获取token
     * 1、获取当前时间的时间的毫秒时间戳A
     * 2、用调用方的数字证书B和A进行字符串顺序拼接得到字符串C
     * 3、获取字符串C的UTF-8字节数组D
     * 4、采用调用方的私钥，使用SM2签名算法对字节数组D进行签名得到字节数组E
     * 5、对字节数组E进行base64编码得到字符串F
     * 6、组装得到token：{B}.{A}.{F}
     * @return
     */
    @SneakyThrows
    public static String getToken() {
        long timestamp = System.currentTimeMillis();
        String certificateB = "5DED9AC421AC4FD8B03C5E7236A9A201"; // 示例证书信息
        String C = certificateB + timestamp;
        byte[] D = C.getBytes(StandardCharsets.UTF_8);
        SM2SignVO sm2signv0 = SM2SignVerUtils.Sign2SM2(Util.hexStringToBytes("23E57DA1E4AB865CCBC325B668762207DEF74345B782237808AE0BABDF26734D"), D);
        byte[] E = sm2signv0.getSm2_signForHard().getBytes();
        String F = Base64.getEncoder().encodeToString(E);
        return certificateB + "." + timestamp + "." + F;
    }

    public static void main(String[] args) {
        System.out.println("token:" + getToken());
    }

}