/*
 * Copyright (c) 2002-2015 mgm technology partners GmbH
 *
 * 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.mgmtp.perfload.test.utils;

import java.util.HashMap;
import java.util.Set;
import java.util.UUID;

import javax.inject.Inject;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.mgmtp.perfload.core.client.config.annotations.ExecutionId;
import com.mgmtp.perfload.core.client.config.scope.ExecutionScope;
import com.mgmtp.perfload.core.client.event.LtProcessEvent;
import com.mgmtp.perfload.core.client.event.LtProcessEventListener;
import com.mgmtp.perfload.core.client.runner.LtRunner;
import com.mgmtp.perfload.core.common.util.LtStatus;

/**
 * @author rnaegele
 * @since 4.7.1
 */
class TestExecutor {
	private final Logger logger = LoggerFactory.getLogger(getClass());
	private final LtRunner runner;
	private final Set<LtProcessEventListener> listeners;
	private final ExecutionScope executionScope;
	private final UUID executionId;

	@Inject
	TestExecutor(final LtRunner runner, final Set<LtProcessEventListener> listeners,
			final ExecutionScope executionScope, @ExecutionId final UUID executionId) {
		this.runner = runner;
		this.listeners = listeners;
		this.executionScope = executionScope;
		this.executionId = executionId;
	}

	void runDriver() {
		LtStatus status = LtStatus.ERROR;
		fireProcessStarted();
		try {
			executionScope.enterScope(executionId, new HashMap<>());
			runner.execute();
			status = LtStatus.SUCCESSFUL;
		} finally {
			fireProcessFinished(status);
			executionScope.exitScope(executionId);
		}
	}

	private void fireProcessStarted() {
		LtProcessEvent event = new LtProcessEvent(1, 1);
		logger.debug("fireProcessStarted: {}", event);

		for (LtProcessEventListener listener : listeners) {
			logger.debug("Executing listener: {}", listener);
			listener.processStarted(event);
		}
	}

	private void fireProcessFinished(final LtStatus result) {
		LtProcessEvent event = new LtProcessEvent(1, 1, result);
		logger.debug("fireProcessFinished: {}", event);

		for (LtProcessEventListener listener : listeners) {
			logger.debug("Executing listener: {}", listener);
			listener.processFinished(event);
		}
	}
}