package com.aojie.controller;

import com.aojie.domain.SysLog;
import com.aojie.service.SysLogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.User;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Date;

/**
 * @author aojie
 * @Function
 * @create 2020-06-29 21:27
 */
@Component
@Aspect
public class LogAop {
   /* 需要先在web.xml文件中配置
      <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
      </listener>
      */
    @Autowired
    private HttpServletRequest request;
    @Autowired
    private SysLogService service;
    //开始时间
    private Date visitTime;
    //访问的类
    private Class clazz;
    //访问的方法
    private Method method;
    //主要是获取开始时间和执行类以及执行方法
    @Before("execution(* com.aojie.controller.*.*(..))")
    public void doBefore(JoinPoint jp) throws NoSuchMethodException {
        visitTime=new Date();//当前时间就是开始时间
        //java.lang.Object getTarget() ：获取连接点所在的目标对象
        clazz=jp.getTarget().getClass();//具体要访问的类
        //Signature getSignature() ：获取连接点的方法签名对象；
        String methodName=jp.getSignature().getName();//获取访问的方法名
        Object[] args = jp.getArgs();//获取访问方法的参数
        //获取具体执行方法的Method对象
        if (args==null||args.length==0){
            method=clazz.getMethod(methodName);//只能获取无参的方法
        }else {
            Class[] calssArgs=new Class[args.length];
            for (int i = 0; i < args.length; i++) {
                calssArgs[i]=args[i].getClass();
            }
            clazz.getMethod(methodName,calssArgs);
        }

    }
    @After("execution(* com.aojie.controller.*.*(..))")
    public void doAfter(JoinPoint jp) throws Exception {
        long time=new Date().getTime()-visitTime.getTime();//获取访问时长
        String url="";
        //获取URL
        if (clazz != null&&method!=null&&clazz!= LogAop.class) {
            //获取类上的注解值
            RequestMapping classAnnotation = (RequestMapping)clazz.getAnnotation(RequestMapping.class);
            if (classAnnotation!=null){
                String[] classValue = classAnnotation.value();
                //获取方法上的注解值
                RequestMapping methodAnnotation = method.getAnnotation(RequestMapping.class);
                if (methodAnnotation!=null){
                    String[] methodValue = methodAnnotation.value();
                    url=classValue[0]+methodValue[0];

                    //获取访问的ip
                    String ip = request.getRemoteAddr();
                    //获取操作的用户
                    SecurityContext context= SecurityContextHolder.getContext();//从上下文中获取当前登录的用户
                    User user = (User) context.getAuthentication().getPrincipal();
                    String username = user.getUsername();
                    //将日志相关信息封装到syslog类中
                    SysLog sysLog = new SysLog();
                    sysLog.setExecutionTime(time);//执行时长
                    sysLog.setIp(ip);
                    sysLog.setMethod("类名:"+clazz.getName()+"方法名:"+method.getName());
                    sysLog.setUrl(url);
                    sysLog.setUsername(username);
                    sysLog.setVisitTime(visitTime);
                    //调用service
                    service.save(sysLog);
                }
            }
        }

    }
}