package top.mytao.myproject.platform.aspact;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.bouncycastle.asn1.ocsp.ResponseData;
import org.slf4j.MDC;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import top.mytao.myproject.business.event.LogEvent;
import top.mytao.myproject.platform.Constants;
import top.mytao.myproject.platform.controller.entity.LogEntity;
import top.mytao.myproject.platform.enums.SysExpEnum;
import top.mytao.myproject.platform.util.IpAddressUtil;

import javax.servlet.http.HttpServletRequest;
import java.util.Objects;

/**
 * AOP 统一处理日志信息
 *
 * @author  
 * @date 2022/1/15
 */
@Slf4j
@Component
@Aspect
public class WebLogAspect {
    public static final String GET = "GET";
    @Autowired
    private ApplicationContext context;

    /**
     * 定义切点
     */
    @Pointcut("execution(public * top.mytao.myproject.platform.controller.BaseController+.*(..))")
    public void requestServer() {
    }

    @Around("requestServer()")
    public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
        // 请求开始时间
        long startTime = System.currentTimeMillis();
        try {
            // 处理请求
            Object result = pjp.proceed();
            // 成功处理
            processSuccess(startTime, pjp, result);
            return result;
        } catch (Exception e) {
            log.error("http request failed!", e);
            // 异常处理
            processError(startTime, pjp, e.getMessage());
            throw e;
        }
    }

    private LogEntity buildLogEntity(ProceedingJoinPoint pjp, long startTime, String returnCode) {
        // 获取请求信息
        ServletRequestAttributes sra = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = sra.getRequest();
        // 获取代理地址、请求地址、请求类名、方法名
        LogEntity logEntity = new LogEntity();
        logEntity.setIp(IpAddressUtil.getIpAdrress(request));
        logEntity.setRequestUrl(request.getRequestURI());
        logEntity.setLogId(MDC.get(Constants.TRACE_ID));
        logEntity.setHttpMethod(request.getMethod());
        logEntity.setTargetClass(pjp.getTarget().getClass().getSimpleName());
        logEntity.setTargetMethod(pjp.getSignature().getName());
        logEntity.setRequestParams(getRequestParams(pjp, request));
        logEntity.setStartTime(startTime);
        logEntity.setReturnCode(returnCode);
        // 请求完成时间
        long endTime = System.currentTimeMillis();
        logEntity.setCost(endTime - startTime);
        logEntity.setEndTime(endTime);
        return logEntity;
    }

    private String getRequestParams(JoinPoint joinPoint, HttpServletRequest request) {
        String requestParams;
        if (GET.equals(request.getMethod())) {
            requestParams = request.getQueryString();
        }else {
            // 获取参数信息
            requestParams = JSONObject.toJSONString(joinPoint.getArgs());
        }
        return requestParams;
    }

    private void processError(long startTime, ProceedingJoinPoint pjp, String errorMessage) {
        LogEntity logEntity = buildLogEntity(pjp, startTime, SysExpEnum.UNKNOW_ERROR.getCode());
        logEntity.setErrorInfo(errorMessage);
        // 推送日志到数据库
        pushLog(logEntity);
    }

    private void processSuccess(long startTime, ProceedingJoinPoint pjp, Object result) {
        LogEntity logEntity = buildLogEntity(pjp, startTime, SysExpEnum.SUCCESS.getCode());
        // 记录请求完成执行时间
        String response = getResponse(result);
        logEntity.setResponse(response);
        // 推送日志
        pushLog(logEntity);
    }

    private void pushLog(LogEntity logEntity) {
        LogEvent.Builder logEvent = new LogEvent.Builder(this).logEntity(logEntity);
        context.publishEvent(logEvent.build());
        log.info(JSON.toJSONString(logEntity));
    }

    private String getResponse(Object result) {
        String response = "";
        if (Objects.isNull(result)) {
            return response;
        }
        if (result instanceof ResponseData) {
            response = JSON.toJSONString(result, SerializerFeature.WriteDateUseDateFormat);
        }else {
            response = String.valueOf(result);
        }
        return response;
    }
}