package com.gkhy.exam.framework.security.filter;

import com.gkhy.exam.common.utils.StringUtils;
import com.gkhy.exam.framework.web.service.TokenService;
import com.gkhy.exam.framework.web.service.UserDetailServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

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

@Component
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
    @Autowired
    private TokenService tokenService;
    @Autowired
    private UserDetailServiceImpl userDetailService;


    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        String token=request.getHeader(TokenService.HEADER);
        if(StringUtils.isNotEmpty(token)){
            String username=tokenService.getUserNameFromToken(token);
            if(StringUtils.isNotEmpty(username)){
                UserDetails userDetails=userDetailService.loadUserByUsername(username);
                if(tokenService.validateToken(token,userDetails)){
                    UsernamePasswordAuthenticationToken authenticationToken=new UsernamePasswordAuthenticationToken(userDetails,null,userDetails.getAuthorities());
                    authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
                    SecurityContextHolder.getContext().setAuthentication(authenticationToken);
                }
            }
        }
        filterChain.doFilter(request,response);
    }
}