/*-
 * ============LICENSE_START=======================================================
 * org.openecomp.aai
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.aai.tasks;

import java.io.File;
import java.util.Arrays;
import java.util.Date;
import java.util.UUID;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.comparator.LastModifiedFileComparator;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import org.openecomp.aai.logging.LoggingContext;
import org.openecomp.aai.util.AAIConfig;
import org.openecomp.aai.util.AAIConstants;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;

@Component
public class ScheduledTasks {

	private static EELFLogger LOGGER = EELFManager.getInstance().getLogger(ScheduledTasks.class);

	private static final String COMPONENT = "Scheduler";
	private static final String FROM_APP_ID = "CronApp";
	private static final long PROPERTY_READ_INTERVAL = 60000; // every minute

	private String GlobalPropFileName = AAIConstants.AAI_CONFIG_FILENAME;

	// for read and possibly reloading aaiconfig.properties and other
	/**
	 * Load AAI properties.
	 */
	// configuration properties files
	@Scheduled(fixedRate = PROPERTY_READ_INTERVAL)
	public void loadAAIProperties() {
		final UUID transId = UUID.randomUUID();

		LoggingContext.requestId(transId);
		LoggingContext.partnerName(FROM_APP_ID);
		LoggingContext.component(COMPONENT);

		String dir = FilenameUtils.getFullPathNoEndSeparator(GlobalPropFileName);
		if (dir == null || dir.length() < 3) {
			dir = "/opt/aai/etc";
		}

		File pdir = new File(dir);
		File[] files = pdir.listFiles();
		Arrays.sort(files, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
		String fn;

		// leave this loop here since we may want to check other configurable
		// property files in the SAME directory
		for (File file : files) {
			fn = file.getName();
			if (fn.equals("aaiconfig.properties")) {
				Date lastMod = new Date(file.lastModified());
				long lastModTm = lastMod.getTime();
				Date curTS = new Date();
				long curTSTm = curTS.getTime();
				if (curTSTm - lastModTm < PROPERTY_READ_INTERVAL + 1000) {
					AAIConfig.reloadConfig();
					LOGGER.info("reloaded from aaiconfig.properties");
				}
				break;
			}
		}
	}
}