/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.skywalking.apm.toolkit.activation.webflux;

import org.apache.skywalking.apm.agent.core.context.ContextSnapshot;
import org.apache.skywalking.apm.agent.core.logging.api.ILog;
import org.apache.skywalking.apm.agent.core.logging.api.LogManager;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;

import java.lang.reflect.Method;

public class WebFluxSkyWalkingSpanIDInterceptor extends WebFluxSkyWalkingStaticMethodsAroundInterceptor {

    private static final ILog LOGGER = LogManager.getLogger(WebFluxSkyWalkingSpanIDInterceptor.class);

    @Override
    public void beforeMethod(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
                             MethodInterceptResult result) {
        final ContextSnapshot contextSnapshot = getContextSnapshot(allArguments[0]);
        if (contextSnapshot == null || contextSnapshot.getCorrelationContext() == null) {
            return;
        }
        result.defineReturnValue(contextSnapshot.getSpanId());
    }

    @Override
    public Object afterMethod(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
                              Object ret) {
        return ret;
    }

    @Override
    public void handleMethodException(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
                                      Throwable t) {
        LOGGER.error("Failed to getDefault span Id.", t);
    }
}
