package com.happy.interceptor;

import com.alibaba.fastjson.JSONObject;
import com.happy.Model.Login;
import com.happy.Until.ResultUtil;
import com.happy.Until.TokenUtil;
import com.happy.annotation.PassToken;
import com.happy.annotation.UserLoginToken;
import com.happy.constant.ResultStatusCode;
import com.happy.service.UserService;
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;
import java.time.LocalDateTime;
import java.util.List;


public class AuthenticationInterceptor implements HandlerInterceptor {
    @Autowired
    UserService userService;

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {
        String access_token = TokenUtil.getRequestToken(httpServletRequest);
        // 如果不是映射到方法直接通过
        if(!(object instanceof HandlerMethod)){
            return true;
        }
        HandlerMethod handlerMethod=(HandlerMethod)object;
        Method method=handlerMethod.getMethod();
        //检查是否有passtoken注释，有则跳过认证
        if (method.isAnnotationPresent(PassToken.class)) {
            PassToken passToken = method.getAnnotation(PassToken.class);
            if (passToken.required()) {
                return true;
            }
        }
        //检查有没有需要用户权限的注解
        if (method.isAnnotationPresent(UserLoginToken.class)) {
            UserLoginToken userLoginToken = method.getAnnotation(UserLoginToken.class);
            if (userLoginToken.required()) {
                // 执行认证
                if (access_token == null) {
                    throw new RuntimeException(JSONObject.toJSONString(ResultUtil.build(ResultStatusCode.SHIRO_ERROR)));
                }
                //1. 根据token，查询用户信息
                List<Login> logins = userService.findByToken(access_token);
                //2. 若用户不存在,
                if (logins.isEmpty()) {
                    throw new RuntimeException(JSONObject.toJSONString(ResultUtil.build(ResultStatusCode.LOGINED_IN2)));
                }
                //3. token失效
                LocalDateTime tie = LocalDateTime.parse(logins.get(0).getAccess_token());
                if (tie.isBefore(LocalDateTime.now())) {
                    throw new RuntimeException(JSONObject.toJSONString(ResultUtil.build(ResultStatusCode.LOGINED_IN3)));
                }
                return true;
            }
        }
        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 {

    }
}