package com.supervision.config;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import org.springframework.util.ObjectUtils;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;

import java.util.HashMap;
import java.util.Map;

/**
 * 日志切面
 *
 * @author :liu
 * create :2020-11-16 10:50
 **/
@Component
@Aspect
@Slf4j
public class RequestLogConfig {


	@SuppressWarnings("all")
	@Around("within(com..*..controller..*) && @within(org.springframework.web.bind.annotation.RestController)")
	public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
		long start = System.currentTimeMillis();
		ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
		HttpServletRequest request = attributes.getRequest();
		Object result = proceedingJoinPoint.proceed();
		RequestInfo requestInfo = new RequestInfo();
		requestInfo.setUrl(request.getRequestURL().toString());
		requestInfo.setHttpMethod(request.getMethod());
		requestInfo.setClassMethod(String.format("%s.%s", proceedingJoinPoint.getSignature().getDeclaringTypeName(),
				proceedingJoinPoint.getSignature().getName()));
		requestInfo.setRequestParams(getRequestParamsByProceedingJoinPoint(proceedingJoinPoint));
		requestInfo.setResult(proceedResult(result));
		requestInfo.setTimeCost(System.currentTimeMillis() - start);
		log.info("Request Info: {}", JSONUtil.toJsonStr(requestInfo));
		return result;
	}

	private Object proceedResult(Object result) {
		String value = null;
		try {
			value = JSONUtil.toJsonStr(result);
		} catch (Exception e) {
			value = result.toString();
		}
		if (StrUtil.isNotBlank(value) && value.length() > 10240){
			value = value.substring(0, 1024) + "......" + value.substring(value.length() - 1024);
			return value;
		}
		return result;
	}


	@SuppressWarnings("all")
	@AfterThrowing(pointcut = "@within(org.springframework.web.bind.annotation.RestController)", throwing = "e")
	public void doAfterThrow(JoinPoint joinPoint, RuntimeException e) {
		ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
		HttpServletRequest request = attributes.getRequest();
		RequestErrorInfo requestErrorInfo = new RequestErrorInfo();
		requestErrorInfo.setUrl(request.getRequestURL().toString());
		requestErrorInfo.setHttpMethod(request.getMethod());
		requestErrorInfo.setClassMethod(String.format("%s.%s", joinPoint.getSignature().getDeclaringTypeName(),
				joinPoint.getSignature().getName()));
		requestErrorInfo.setRequestParams(getRequestParamsByJoinPoint(joinPoint));
		requestErrorInfo.setException(e);
		log.info("Error Request Info : {}", JSONUtil.toJsonStr(requestErrorInfo));
	}

	/**
	 * 获取入参
	 *
	 * @param proceedingJoinPoint
	 * @return
	 */
	private Map<String, Object> getRequestParamsByProceedingJoinPoint(ProceedingJoinPoint proceedingJoinPoint) {
		//参数名
		String[] paramNames = ((MethodSignature) proceedingJoinPoint.getSignature()).getParameterNames();
		//参数值
		Object[] paramValues = proceedingJoinPoint.getArgs();

		return buildRequestParam(paramNames, paramValues);
	}

	private Map<String, Object> getRequestParamsByJoinPoint(JoinPoint joinPoint) {
		//参数名
		String[] paramNames = ((MethodSignature) joinPoint.getSignature()).getParameterNames();
		//参数值
		Object[] paramValues = joinPoint.getArgs();

		return buildRequestParam(paramNames, paramValues);
	}

	private Map<String, Object> buildRequestParam(String[] paramNames, Object[] paramValues) {
		Map<String, Object> requestParams = new HashMap<>();
		for (int i = 0; i < paramNames.length; i++) {
			Object value = paramValues[i];
			if (value instanceof ServletRequest || value instanceof ServletResponse) {
				//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;
			}

			//如果是文件对象
			if (value instanceof MultipartFile) {
				MultipartFile file = (MultipartFile) value;
				//获取文件名
				value = file.getOriginalFilename();
			} else if (value instanceof String) {
				// 如果参数很长,就对参数进行修剪
				String temp = (String) value;
				if (!ObjectUtils.isEmpty(temp) && temp.length() > 1024) {
					value = temp.substring(0, 10) + "......" + temp.substring(temp.length() - 10);
				}
			}
			requestParams.put(paramNames[i], value);
		}

		return requestParams;
	}

	@Data
	public static class RequestInfo {
		private String url;
		private String httpMethod;
		private String classMethod;
		private Object requestParams;
		private Object result;
		private Long timeCost;
	}

	@Data
	public static class RequestErrorInfo {
		private String url;
		private String httpMethod;
		private String classMethod;
		private Object requestParams;
		private RuntimeException exception;
	}
}