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/*
 * Copyright 2018 the original author or authors.
 *
 * 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 de.codecentric.spring.boot.chaos.monkey.watcher;

import de.codecentric.spring.boot.chaos.monkey.component.ChaosMonkeyRequestScope;
import de.codecentric.spring.boot.chaos.monkey.component.MetricEventPublisher;
import de.codecentric.spring.boot.chaos.monkey.component.MetricType;
import de.codecentric.spring.boot.chaos.monkey.configuration.WatcherProperties;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;

/**
 * @author Benjamin Wilms
 */

@Aspect
@AllArgsConstructor
@Slf4j
public class SpringComponentAspect extends ChaosMonkeyBaseAspect {

    private final ChaosMonkeyRequestScope chaosMonkeyRequestScope;
    private MetricEventPublisher metricEventPublisher;
    private WatcherProperties watcherProperties;

    @Pointcut("within(@org.springframework.stereotype.Component *)")
    public void classAnnotatedWithComponentPointcut() {
    }

    @Around("classAnnotatedWithComponentPointcut() && allPublicMethodPointcut() && !classInChaosMonkeyPackage()")
    public Object intercept(ProceedingJoinPoint pjp) throws Throwable {

        if (watcherProperties.isComponent()) {
            log.debug("Watching public method on component class: {}", pjp.getSignature());

            if (metricEventPublisher != null)
                metricEventPublisher.publishMetricEvent(calculatePointcut(pjp.toShortString()), MetricType.COMPONENT);

            MethodSignature signature = (MethodSignature) pjp.getSignature();

            chaosMonkeyRequestScope.callChaosMonkey(createSignature(signature));
        }
        return pjp.proceed();
    }
}