package common.utils;


import com.video.model.pojo.SystemUser;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import lombok.extern.slf4j.Slf4j;

import java.util.Date;

/**
 * jwt 工具
 **/
@Slf4j
public class JWTUtil {

    /**
     * 主题
     */
    private static final String SUBJECT = "chuanghai-ihotel";

    /**
     * 加密密钥
     */
    private static final String SECRET = "chuanghai.ihotel";

    /**
     * 令牌前缀
     */
    private static final String TOKEN_PREFIX = "ihotel";


    /**
     * token过期时间，7天
     */
    private static final long EXPIRED = 1000 * 60 * 60 * 24 * 7;

    /**
     * 获取过期时间
     * @return
     */
    public static long getExpired() {
        return EXPIRED;
    }

    /**
     * 生成token
     *
     * @param loginUser
     * @return
     */
    public static String geneJsonWebToken(SystemUser loginUser) {
        if (loginUser == null) {
            throw new NullPointerException("对象为空");
        }

        String adminIdStr = "";
        if (loginUser.getId() != null) {
            adminIdStr = loginUser.getId().toString();
        }
        String token = Jwts.builder().setSubject(SUBJECT)
                //配置payload
                .claim("phone", loginUser.getPhoneNumber())
                .claim("role_id", loginUser.getRoleId())
                .claim("admin_id", adminIdStr)
                .setIssuedAt(new Date())
                .setExpiration(new Date(CommonUtil.getCurrentTimestamp() + EXPIRED))
                .signWith(SignatureAlgorithm.HS256, SECRET).compact();

        token = TOKEN_PREFIX + token;
        return token;
    }

    /**
     * 解密jwt
     * @param token
     * @return
     */
    public static Claims checkJWT(String token) {
        try {
            final Claims claims = Jwts.parser().setSigningKey(SECRET).parseClaimsJws(token.replace(TOKEN_PREFIX, "")).getBody();
            return claims;
        } catch (Exception e) {
            return null;
        }
    }

    public static void main(String[] args) {
//        System.out.println(geneJsonWebToken(LoginUserDTO.builder().adminId(1L).cardNumber("123456").identityType("1").build()));
    }
}