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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.assaults;

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.AssaultException;
import de.codecentric.spring.boot.chaos.monkey.configuration.ChaosMonkeySettings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Thorsten Deelmann
 */
public class ExceptionAssault implements ChaosMonkeyRequestAssault {

    private static final Logger LOGGER = LoggerFactory.getLogger(ExceptionAssault.class);
    private final ChaosMonkeySettings settings;
    private MetricEventPublisher metricEventPublisher;

    public ExceptionAssault(ChaosMonkeySettings settings, MetricEventPublisher metricEventPublisher) {
        this.settings = settings;
        this.metricEventPublisher = metricEventPublisher;
    }

    @Override
    public boolean isActive() {
        return settings.getAssaultProperties().isExceptionsActive();
    }

    @Override
    public void attack() {
        LOGGER.info("Chaos Monkey - exception");

        AssaultException assaultException = this.settings.getAssaultProperties().getException();

        // metrics
        if (metricEventPublisher != null)
            metricEventPublisher.publishMetricEvent(MetricType.EXCEPTION_ASSAULT);

        assaultException.throwExceptionInstance();
    }
}