package com.celnet.datadump.aspect;

import com.alibaba.fastjson.JSON;

import com.celnet.datadump.annotation.LogServiceAnnotation;
import com.celnet.datadump.entity.DataLog;
import com.celnet.datadump.service.DataLogService;
import com.google.common.collect.Lists;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.Date;


/**
 *
 */
@Aspect
@Component
@Order(-1)
public class OperateLogAspect {
    private static final Logger log = LoggerFactory.getLogger(OperateLogAspect.class);

    @Autowired
    private DataLogService dataLogService;

    @Pointcut(value = "@annotation(com.celnet.datadump.annotation.LogServiceAnnotation)")
    public void operateLogAspectPoint(){
    }

    @Around("operateLogAspectPoint()")
    public Object around(ProceedingJoinPoint joinPoint) {

        //开始时间
        Date startTime = new Date();
        //日志注解
        LogServiceAnnotation logServiceAnno = null;

        //request请求
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
        //捕获请求参数
        Object[] args = joinPoint.getArgs();
        //结果
        Object result = null;
        try {

            //获取注解
            logServiceAnno = getAnnotationLog(joinPoint);

            //执行程序
            result = joinPoint.proceed();

            //初始化日志记录
            DataLog dataLog = initializeOperateLog(joinPoint,args,startTime,logServiceAnno,result,null);

            //保存日志
            dataLogService.save(dataLog);

        } catch (Throwable throwable) {

            //初始化日志记录
            DataLog dataLog = initializeOperateLog(joinPoint,args,startTime,logServiceAnno,null,throwable);

            //保存日志
            dataLogService.save(dataLog);

            log.error("日志拦截异常："+throwable);
        }

        return result;
    }

    /**
     * 初始化操作日志
     * @param joinPoint  节点
     */
    private DataLog initializeOperateLog(ProceedingJoinPoint joinPoint , Object[] args , Date startTime , LogServiceAnnotation logServiceAnno , Object result , Throwable throwable) {

        if(logServiceAnno == null){
            return null;
        }

        //request请求
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = (HttpServletRequest) requestAttributes.resolveReference(RequestAttributes.REFERENCE_REQUEST);
        //ip
        String ip = request.getHeader("HTTP_X_FORWARDED_FOR");


        //请求参数
        Object[] arguments = new Object[args.length];
        for (int i = 0; i < args.length; i++) {
            if (args[i] instanceof ServletRequest || args[i] instanceof ServletResponse || args[i] instanceof MultipartFile) {
                //ServletRequest不能序列化，从入参里排除，否则报异常：java.lang.IllegalStateException: It is illegal to call this method if the current request is not in asynchronous mode (i.e. isAsyncStarted() returns false)
                //ServletResponse不能序列化 从入参里排除，否则报异常：java.lang.IllegalStateException: getOutputStream() has already been called for this response
                continue;
            }
            arguments[i] = args[i];
        }
        String argStr = arguments.length <= 0 ? "" : JSON.toJSONString(arguments);
        //响应结果
        String resultStr = result == null ? "" : JSON.toJSONString(result);
        //异常信息
        String exceptionStr = throwable == null ? "" : JSON.toJSONString(throwable.getMessage());
        //结束时间
        Date endTime = new Date();

        DataLog dataLog = new DataLog();
        dataLog.setIp(ip);
        dataLog.setStartTime(startTime);
        dataLog.setEndTime(endTime);
        if(resultStr.contains("200")){
            dataLog.setCode("200");
            dataLog.setStatus("成功");
            dataLog.setMessage(resultStr);
        } else {
            dataLog.setCode("500");
            dataLog.setStatus("失败");
            dataLog.setMessage(exceptionStr);
        }
        dataLog.setRequestUrl(request.getRequestURI());
        dataLog.setRequestType(logServiceAnno.operateType());
        dataLog.setRequestData(argStr);
        dataLog.setRequestMethod(logServiceAnno.remark());

        return dataLog;
    }


    /**
     * 获取注解
     * @param joinPoint 节点
     * @return  结果
     */
    private LogServiceAnnotation getAnnotationLog(ProceedingJoinPoint joinPoint) {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();
        if (method != null) {
            // 拿到自定义注解中的信息
            LogServiceAnnotation annotation = method.getAnnotation(LogServiceAnnotation.class);
            System.out.println("打印注解信息："+ JSON.toJSONString(annotation));
            return annotation;
        }
        return null;
    }


}