package com.nju.edu.pay.web;

import com.nju.edu.pay.util.jwt.JWTUtil;
import com.nju.edu.pay.web.annotation.RootAllowed;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;


public class AuthenticationInterceptor implements HandlerInterceptor {

    @Autowired
    JWTUtil jwtUtil;

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {
        HandlerMethod handlerMethod=(HandlerMethod)object;
        Method method=handlerMethod.getMethod();
        if (method.isAnnotationPresent(RootAllowed.class)) {
            RootAllowed passToken = method.getAnnotation(RootAllowed.class);
            if (passToken.required()) {
                String token=httpServletRequest.getHeader("Authorization");
                return jwtUtil.verifyToken(token);
            }
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }
    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}