package com.apobates.forum.thrones.controller.helper;

import com.apobates.forum.member.entity.MemberOnline;
import com.apobates.forum.member.service.MemberOnlineService;
import com.apobates.forum.member.storage.OnlineMemberStorage;
import com.apobates.forum.member.storage.core.MemberSessionBean;
import com.apobates.forum.member.storage.core.MemberSessionBeanBuilder;
import com.apobates.forum.utils.Commons;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.SmartView;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

/**
 * 在线会员记录拦截器
 * 
 * @author xiaofanku
 * @since 20200607
 */
public class MemberOnlineInterceptor extends HandlerInterceptorAdapter{
    @Autowired
    private OnlineMemberStorage onlineMemberStorage;
    @Autowired
    private MemberOnlineService memberOnlineService;
    private final static Logger logger = LoggerFactory.getLogger(MemberOnlineInterceptor.class);
    
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        logger.info("[MOI][AFT]after handle start");
    }
    /**
     * Executed before after handler is executed.If view is a redirect view, we don't need to execute postHandle
     * @param request
     * @param response
     * @param handler
     * @param modelAndView
     * @throws java.lang.Exception
     **/
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        logger.info("[MOI][PST]post handle start");
        if (modelAndView != null && !isRedirectView(modelAndView)) {
            logger.info(String.format("[MOI][PST]mapping view:%s", modelAndView.getViewName()));
            //------------------------------------------会员在线记录
            MemberSessionBean mbean = getMemberBean(request);
            memberOnlineService.create(new MemberOnline(request.getSession().getId(), mbean.getMid(), mbean.getNames(), mbean.getNickname(), null));
            //------------------------------------------
        }
    }
    /**
     * Executed before actual handler is executed
     * @param request
     * @param response
     * @param handler
     * @return 
     * @throws java.lang.Exception 
     **/
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        logger.info(String.format("[MOI][PRE]request uri:%s", request.getRequestURI()));
        return true;
    }
    
    private MemberSessionBean getMemberBean(HttpServletRequest request){
        MemberSessionBean mbean = onlineMemberStorage.getInstance(request, "MemberOnlineInterceptor").orElse(null);
        if (null == mbean || !mbean.isOnline()) {
            String ipAddr = Commons.getRequestIp(request);
            String gnick = String.format("Guest#%d", Commons.ipHashcode(ipAddr));
            mbean = MemberSessionBeanBuilder.empty().setNickname(gnick).build(Commons.getRequestIp(request), "MOI");
        }
        return mbean;
    }
    
    public static boolean isRedirectView(ModelAndView mv) {
        String viewName = mv.getViewName();
        if (viewName.startsWith("redirect:/")) {
            return true;
        }
        
        View view = mv.getView();
        return (view != null && view instanceof SmartView && ((SmartView) view).isRedirectView());
    }
}