/*
 * Copyright 2019 WeBank
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.webank.wedatasphere.linkis.metadata.hive.config;

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.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;


@Aspect
@Component
public class MultiSourceExAop implements Ordered {

    private Logger log = LoggerFactory.getLogger(this.getClass());

    @Pointcut(value = "@annotation(com.webank.wedatasphere.linkis.metadata.hive.config.DataSource)")
    private void cut() {

    }

    @Around("cut()")
    public Object around(ProceedingJoinPoint point) throws Throwable {

        Signature signature = point.getSignature();
        MethodSignature methodSignature = null;
        if (!(signature instanceof MethodSignature)) {
            throw new IllegalArgumentException("该注解只能用于方法");
        }
        methodSignature = (MethodSignature) signature;

        Object target = point.getTarget();
        Method currentMethod = target.getClass().getMethod(methodSignature.getName(), methodSignature.getParameterTypes());

        DataSource datasource = currentMethod.getAnnotation(DataSource.class);
        if (datasource != null) {
            DataSourceContextHolder.setDataSourceType(datasource.name());
            log.debug("设置数据源为：" + datasource.name());
        } else {
            DataSourceContextHolder.setDataSourceType(DSEnum.FIRST_DATA_SOURCE);
            log.debug("设置数据源为：hiveDataSource");
        }
        try {
            return point.proceed();
        } finally {
            log.debug("清空数据源信息！");
            DataSourceContextHolder.clearDataSourceType();
        }
    }

    @Override
    public int getOrder() {
        return 1;
    }

}
