package com.mes.common.filter;

import com.mes.common.utils.RedisUtil;
import com.mes.userinfo.service.SysUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.annotation.Resource;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @Author : zhoush
 * @Date: 2024/4/10 9:42
 * @Description:
 */
@Component
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
    // 此处解释为什么不去实现Filter接口，因为在某些情况下会过滤两次，执行两次Filter里面的方法，所以我们选择继承SpringSecurity中的OncePerRequestFilter
    @Autowired
    private RedisUtil redisUtil;

    @Resource
    private SysUserService sysUserService;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        //获取token
        String token = request.getHeader("token");
//
//        if (!StringUtils.hasText(token)) {
//            //放行
//            filterChain.doFilter(request, response);
//            return; // 此处加上return好处是后面结果返回的时候就不会再走一遍此过滤器的方法了
//        }
//        //解析token
//        String userid;
//        try {
//            Claims claims = JwtUtil.getClaimByToken(token);
//            userid = claims.getSubject();
//        } catch (Exception e) {
//            e.printStackTrace();
//            throw new RuntimeException("token非法");
//        }
//        //从redis中获取用户信息
//        String redisKey = "login:" + userid;
//        LoginUser loginUser = redisUtil.getCacheObject(redisKey);
//        if (Objects.isNull(loginUser)) {
//            response.setHeader("token", "");
//            throw new RuntimeException("用户未登录");
//        }
//        //将用户信息放入当前线程
//        UserInfoUtils.set(loginUser.getUser());
//        //存入SecurityContextHolder，以供后面的过滤器使用
//        List<String> permissionKeyList = sysUserService.getUserAuthorityInfo(Long.parseLong(userid));
//        List<GrantedAuthority> authorities = permissionKeyList.stream().
//                map(SimpleGrantedAuthority::new)
//                .collect(Collectors.toList());
//        UsernamePasswordAuthenticationToken authenticationToken =
//                new UsernamePasswordAuthenticationToken(loginUser, null, authorities);
//        SecurityContextHolder.getContext().setAuthentication(authenticationToken);
        //放行
        filterChain.doFilter(request, response);
    }
}