/**
 * Copyright (c) 2018 人人开源 All rights reserved.
 * <p>
 * https://www.renren.io
 * <p>
 * 版权所有，侵权必究！
 */

package com.epmet.jwt;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * Jwt工具类
 *
 * @author Mark sunlightcs@gmail.com
 * @since 1.0.0
 */
@Component
public class JwtTokenUtils {
    private static final Logger logger = LoggerFactory.getLogger(JwtTokenUtils.class);

    @Autowired
    private JwtTokenProperties jwtProperties;

    /**
     * 生成jwt token 弃用
     */
    @Deprecated
    public String generateToken(String userId) {
        return Jwts.builder()
                .setHeaderParam("typ", "JWT")
                .setSubject(userId)
                .setIssuedAt(new Date())
                .setExpiration(DateTime.now().plusSeconds(jwtProperties.getExpire()).toDate())
                .signWith(SignatureAlgorithm.HS512, jwtProperties.getSecret())
                .compact();
    }

    public Claims getClaimByToken(String token) {
        try {
            return Jwts.parser()
                    .setSigningKey(jwtProperties.getSecret())
                    .parseClaimsJws(token)
                    .getBody();
        } catch (Exception e) {
            logger.debug("validate is token error, token = " + token, e);
            return null;
        }
    }

    public Claims getClaimByToken(String token, String secret) {
        try {
            return Jwts.parser()
                    .setSigningKey(secret)
                    .parseClaimsJws(token)
                    .getBody();
        } catch (Exception e) {
            logger.debug("validate is token error, token = " + token, e);
            return null;
        }
    }

    /**
     * @return java.util.Date
     * @param token
     * @Author yinzuomei
     * @Description 获取token的有效期截止时间
     * @Date 2020/3/18 22:17
     **/
    public Date getExpiration(String token){
        try {
            return Jwts.parser()
                    .setSigningKey(jwtProperties.getSecret())
                    .parseClaimsJws(token)
                    .getBody().getExpiration();
        } catch (Exception e) {
            logger.debug("validate is token error, token = " + token, e);
            return null;
        }
    }

    /**
     * @param map
     * @return java.lang.String
     * @Author yinzuomei
     * @Description 根据app+client+userId生成token
     * @Date 2020/3/18 22:29
     **/
    public String createToken(Map<String, Object> map) {
        return Jwts.builder()
                .setHeaderParam("typ", "JWT")
                .setClaims(map)
                .setIssuedAt(new Date())
                .setExpiration(DateTime.now().plusSeconds(jwtProperties.getExpire()).toDate())
                .signWith(SignatureAlgorithm.HS512, jwtProperties.getSecret())
                .compact();
    }

    /**
     * token是否过期
     *
     * @return true：过期
     */
    public boolean isTokenExpired(Date expiration) {
        return expiration == null || expiration.before(new Date());
    }

    public static void main(String[] args) {
        Map<String, Object> map=new HashMap<>();
        map.put("app","gov");
        map.put("client","wxmp");
        map.put("userId","100526ABC");
        String tokenStr=Jwts.builder()
                .setHeaderParam("typ", "JWT")
                .setClaims(map)
                .setIssuedAt(new Date())
                .setExpiration(DateTime.now().plusSeconds(604800).toDate())
                .signWith(SignatureAlgorithm.HS512, "7016867071f0ebf1c46f123eaaf4b9d6[elink.epmet]")
                .compact();
        System.out.println(tokenStr);
        Claims claims= Jwts.parser()
                .setSigningKey("7016867071f0ebf1c46f123eaaf4b9d6[elink.epmet]")
                .parseClaimsJws(tokenStr)
                .getBody();
        System.out.println("app="+ claims.get("app"));
        System.out.println("client="+ claims.get("client"));
        System.out.println("userId="+ claims.get("userId"));
    }

}