/**
 * Copyright (C) 2018-2020
 * All rights reserved, Designed By www.yixiang.co
 * 注意：
 * 本软件为www.yixiang.co开发研制
 */
package com.sandu.common.security;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONObject;
import com.sandu.common.redis.online.OnlineUser;
import com.sandu.common.redis.online.OnlineUserService;
import com.sandu.common.security.config.SecurityProperties;
import com.sandu.common.security.jwt.JwtTokenProvider;
import com.sandu.common.util.RequestHolder;
import com.sandu.common.util.SpringContextHolder;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;

import javax.servlet.http.HttpServletRequest;

/**
 * 获取当前登录的用户
 *
 * @author Zheng Jie
 * @date 2019-01-17
 */
public class SecurityUtils {

    public static LoginUserInfo getUserDetails() {
        final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication == null) {
            return null;
        }
        if (authentication.getPrincipal() instanceof LoginUserInfo) {
            LoginUserInfo loginUserInfo = (LoginUserInfo) authentication.getPrincipal();
            return loginUserInfo;
        }
        return null;
    }

    /**
     * 获取系统用户名称
     *
     * @return 系统用户名称
     */
    public static String getUsername() {
        final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication == null) {
            return "无登录";
        }
        if (authentication.getPrincipal() instanceof LoginUserInfo) {
            LoginUserInfo loginUserInfo = (LoginUserInfo) authentication.getPrincipal();
            return loginUserInfo.getUsername();
        }
        return "无登录";
    }

    /**
     * 获取系统用户id
     *
     * @return 系统用户id
     */
    public static Long getUserId() {
        SecurityProperties properties = SpringContextHolder.getBean(SecurityProperties.class);
        if (!properties.isCacheOnline()) {
            LoginUserInfo obj = getUserDetails();
            if (obj == null) {
                return null;
            }
            return obj.getUserId();
        } else {
            HttpServletRequest httpServletRequest = RequestHolder.getHttpServletRequest();
            JwtTokenProvider tokenProvider = SpringContextHolder.getBean(JwtTokenProvider.class);
            OnlineUserService onlineUserService = SpringContextHolder.getBean(OnlineUserService.class);
            String username = tokenProvider.getSubjectForce(tokenProvider.getToken(httpServletRequest));
            OnlineUser one = onlineUserService.getOne(properties.getOnlineKey() + username);
            if (one != null && StrUtil.equals(one.getToken(), tokenProvider.getToken(httpServletRequest))) {
                return one.getUserId();
            } else {
                return null;
            }
        }
    }
}