package com.backendsys.config.Security.utils;

import cn.hutool.core.convert.Convert;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.backendsys.config.Security.entity.SecurityUserInfo;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;

import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.Map;

public class SecurityUtil {

    private static final String SECRET_KEY = "452948404D635166546A576E5A7134743777217A25432A462D4A614E64526755";
    private static SecretKey getSignInKey() {
        byte[] bytes = Base64.getDecoder().decode(SECRET_KEY.getBytes(StandardCharsets.UTF_8));
        return new SecretKeySpec(bytes, "HmacSHA256");
    }


    /**
     * 获得当前登录用户ID
     */
    public static Long getUserId() {
        SecurityUserInfo userInfo = getUserInfo();
        return userInfo.getUser_id();
    }

    /**
     * 获得当前登录 Token
     */
    public static String getToken() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        return Convert.toStr(authentication.getDetails());
    }

    /**
     * 获得当前登录用户基础信息
     * 此处的用户信息是根据 Token 解析出来的，因此无法实时更新，仅能用于获取一些基本信息 (以下是完整信息，实际信息见 SecurityUserInfo)
     * {"id":1,"user_id":1,"username":"admin","phone":"13670511519","phone_area_code":"86","nickname":"超人","email":"admin@qq.com","gender":1,"avatar":"/uploads/20240430/20240430143807.png","last_login_ip":"0:0:0:0:0:0:0:1","last_login_uuid":"5b34e58d-c884-4b43-9ce1-1c85b1136dcb","last_login_time":"2024-10-25 17:26:55","is_super":1,"point_balance":9870,"status":1,"audit_status":2,"audit_note":"同意通过备注","create_time":1689734700000,"update_time":1729848415000,"del_flag":-1,"roles":[{"id":1,"role_name":"管理员"}],"token_expiration":1729934998492}
     */
    public static SecurityUserInfo getUserInfo(){
        Claims tokenInfo = Jwts.parser().verifyWith(getSignInKey()).build().parseSignedClaims(getToken()).getPayload();
        JSONObject userInfo = JSONUtil.parseObj(tokenInfo.get("userInfo"));
        String target = Convert.toStr(tokenInfo.get("target"));
        SecurityUserInfo securityUserInfo = JSONUtil.toBean(userInfo, SecurityUserInfo.class);
        securityUserInfo.setTarget(target);
        return securityUserInfo;
    }



    public static Object getPrincipal() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        Object principal = authentication.getPrincipal();
        return principal;
    }

}