package cn.seecoder.seecoderbokserver.util;

import cn.seecoder.seecoderbokserver.exception.MyServiceException;
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.auth0.jwt.exceptions.TokenExpiredException;
import com.auth0.jwt.interfaces.Claim;
import com.auth0.jwt.interfaces.DecodedJWT;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

/**
 * @author mars
 */
@Component
public class JwtUtil {
    private static String jwtSecret;

    @Value("${jwt.secret}")
    public void setJwtSecret(String jwtSecret) { //通过set让static方法读取配置文件中的值
        JwtUtil.jwtSecret = jwtSecret;
    }

    public static String getJwtSecret() {
        return JwtUtil.jwtSecret;
    }

    public static Claim parseJwt(String token) {
//        jwtSecret
        JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(jwtSecret)).build();
        DecodedJWT decodedjwt;
        try {
            decodedjwt = jwtVerifier.verify(token);
        } catch (TokenExpiredException e) {
            throw new MyServiceException("A0230", "用户登陆已过期");
        } catch (JWTVerificationException | IllegalArgumentException e) { //解析错误 或者 token写错
            e.printStackTrace();
            throw new MyServiceException("A0200", "登陆失败");
        }
//        if (decodedjwt.getClaim("exp").asDate().before(new Date())) {
//            throw new  MyServiceException("A0230", "用户登陆已过期");
//        }
        return decodedjwt.getClaim("user_info");
    }

}