package com.ruoyi.framework.aspectj;

import cn.dev33.satoken.SaManager;
import cn.hutool.core.util.StrUtil;
import cn.hutool.crypto.SecureUtil;
import com.baomidou.lock.LockInfo;
import com.baomidou.lock.LockTemplate;
import com.ruoyi.common.annotation.RepeatSubmit;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.ServletUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.framework.config.properties.RepeatSubmitProperties;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

/**
 * 防止重复提交
 *
 * @author Lion Li
 */
@Slf4j
@RequiredArgsConstructor(onConstructor_ = @Autowired)
@Aspect
@Component
public class RepeatSubmitAspect {

    private final RepeatSubmitProperties repeatSubmitProperties;
    private final LockTemplate lockTemplate;

    @Before("@annotation(repeatSubmit)")
    public void doBefore(JoinPoint point, RepeatSubmit repeatSubmit) throws Throwable {
        // 如果注解不为0 则使用注解数值
        long interval = repeatSubmitProperties.getInterval();
        if (repeatSubmit.interval() > 0) {
            interval = repeatSubmit.timeUnit().toMillis(repeatSubmit.interval());
        }
        if (interval < 1000) {
            throw new ServiceException("重复提交间隔时间不能小于'1'秒");
        }
        HttpServletRequest request = ServletUtils.getRequest();
        String nowParams = StrUtil.join(",", point.getArgs());

        // 请求地址（作为存放cache的key值）
        String url = request.getRequestURI();

        // 唯一值（没有消息头则使用请求地址）
        String submitKey = request.getHeader(SaManager.getConfig().getTokenName());
        if (StringUtils.isEmpty(submitKey)) {
            submitKey = url;
        }
        submitKey = SecureUtil.md5(submitKey + ":" + nowParams);
        // 唯一标识（指定key + 消息头）
        String cacheRepeatKey = Constants.REPEAT_SUBMIT_KEY + submitKey;
        LockInfo lock = lockTemplate.lock(cacheRepeatKey, interval, interval / 2);
        if (lock == null) {
            throw new ServiceException(repeatSubmit.message());
        }
    }

}
