package com.guahao;

//import com.google.gson.Gson;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.io.InputStream;
import java.io.Reader;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

/**
 * @author T.W
 * @site xxx
 * @date 2021/9/8
 * @time 下午9:19
 * @discription
 **/
@Aspect
@Component
//@Profile({"dev", "test"})
public class WebLogAspect {

    private final static Logger logger         = LoggerFactory.getLogger(WebLogAspect.class);
    /** 换行符 */
    private static final String LINE_SEPARATOR = System.lineSeparator();

    /** 以自定义 @WebLog 注解为切点 */
    @Pointcut("@annotation(com.guahao.WebLog)")
    public void webLog() {}

    /**
     * 在切点之前织入
     * @param joinPoint
     * @throws Throwable
     */
    @Before("webLog()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        // 开始打印请求日志
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        // 获取 @WebLog 注解的描述信息
        String methodDescription = getAspectLogDescription(joinPoint);

        // 打印请求相关参数
        logger.info("========================================== Start ==========================================");
        // 打印请求 url
        logger.info("URL            : {}", request.getRequestURL().toString());
        // 打印描述信息
        logger.info("Description    : {}", methodDescription);
        // 打印 Http method
        logger.info("HTTP Method    : {}", request.getMethod());
        // 打印调用 controller 的全路径以及执行方法
        logger.info("Class Method   : {}.{}", joinPoint.getSignature().getDeclaringTypeName(), joinPoint.getSignature().getName());
        // 打印请求的 IP
        logger.info("IP             : {}", request.getRemoteAddr());
        // 打印请求入参
        // if(methodDescription.equals("loginUserInfo") || methodDescription.equals("quitUserInfo")){
        //
        // }else{
        //     logger.info("Request Args   : {}", JSON.toJSON(joinPoint.getArgs()));
        // }
        // ✅ 安全地处理请求参数：只序列化非 Servlet 类型的参数
        Object[] args = joinPoint.getArgs();
        List<Object> safeArgs = new ArrayList<>();
        for (Object arg : args) {
            if (arg == null ||
                    !(arg instanceof ServletRequest ||
                            arg instanceof ServletResponse ||
                            arg instanceof InputStream ||
                            arg instanceof Reader)) {
                safeArgs.add(arg);
            }
        }

        logger.info("Request Args   : {}", JSON.toJSONString(safeArgs)); // 使用 toJSONString 更安全
    }

    /**
     * 在切点之后织入
     * @throws Throwable
     */
    @After("webLog()")
    public void doAfter() throws Throwable {
        // 接口结束后换行，方便分割查看
        logger.info("=========================================== End ===========================================" + LINE_SEPARATOR);
    }

    /**
     * 环绕
     * @param proceedingJoinPoint
     * @return
     * @throws Throwable
     */
    @Around("webLog()")
    public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        long startTime = System.currentTimeMillis();
        Object result = proceedingJoinPoint.proceed();

        // 检查是否需要记录响应参数
        boolean logResponse = true;
        try {
            // 获取方法上的@WebLog注解
            String targetName = proceedingJoinPoint.getTarget().getClass().getName();
            String methodName = proceedingJoinPoint.getSignature().getName();
            Object[] arguments = proceedingJoinPoint.getArgs();
            Class targetClass = Class.forName(targetName);
            Method[] methods = targetClass.getMethods();
            for (Method method : methods) {
                if (method.getName().equals(methodName)) {
                    Class[] clazzs = method.getParameterTypes();
                    if (clazzs.length == arguments.length) {
                        WebLog webLog = method.getAnnotation(WebLog.class);
                        if (webLog != null) {
                            logResponse = webLog.logResponse();
                        }
                        break;
                    }
                }
            }
        } catch (Exception e) {
            // 如果获取注解信息失败，默认记录响应参数
            logger.warn("获取WebLog注解信息失败: {}", e.getMessage());
        }

        // 根据配置决定是否打印出参
        if (logResponse) {
            logger.info("Response Args  : {}", JSON.toJSON(result));
        }
        // 执行耗时
        logger.info("Time-Consuming : {} ms", System.currentTimeMillis() - startTime);
        return result;
    }


    /**
     * 获取切面注解的描述
     *
     * @param joinPoint 切点
     * @return 描述信息
     * @throws Exception
     */
    public String getAspectLogDescription(JoinPoint joinPoint)
            throws Exception {
        String targetName = joinPoint.getTarget().getClass().getName();
        String methodName = joinPoint.getSignature().getName();
        Object[] arguments = joinPoint.getArgs();
        Class targetClass = Class.forName(targetName);
        Method[] methods = targetClass.getMethods();
        StringBuilder description = new StringBuilder("");
        for (Method method : methods) {
            if (method.getName().equals(methodName)) {
                Class[] clazzs = method.getParameterTypes();
                if (clazzs.length == arguments.length) {
                    description.append(method.getAnnotation(WebLog.class).description());
                    break;
                }
            }
        }
        return description.toString();
    }

}