package com.imed.costaccount.common.token;

import cn.hutool.core.date.DateField;
import cn.hutool.core.date.DateTime;
import cn.hutool.core.date.DateUtil;
import com.auth0.jwt.JWT;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.interfaces.DecodedJWT;
import com.imed.costaccount.common.exception.CostException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class JwtUtil {

    @Value("${cost.jwt.secret}")
    private String secret;

    @Value("${cost.jwt.expire}")
    private Integer expire;

    public String createToken(Long userId) {
        Date date = DateUtil.offset(new DateTime(), DateField.DAY_OF_YEAR, expire).toJdkDate();
        Algorithm algorithm = Algorithm.HMAC256(secret);
        String token = JWT.create().withClaim("userId", userId).withExpiresAt(date).sign(algorithm);
        return token;
    }

    public int  getUserId(String token) {
        try {
            DecodedJWT decode = JWT.decode(token);
            Integer userId = decode.getClaim("userId").asInt();
            return userId;
        } catch (JWTDecodeException e) {
            throw new CostException(500, "操作非法");
        }
    }

    public void verifierToken(String token) {
        Algorithm algorithm = Algorithm.HMAC256(secret);
        JWT.require(algorithm).build().verify(token);
    }
}