/*
 * ============LICENSE_START==========================================
 * ONAP Portal SDK
 * ===================================================================
 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * ===================================================================
 *
 * Unless otherwise specified, all software contained herein is licensed
 * under the Apache License, Version 2.0 (the "License");
 * you may not use this software 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.
 *
 * Unless otherwise specified, all documentation contained herein is licensed
 * under the Creative Commons License, Attribution 4.0 Intl. (the "License");
 * you may not use this documentation except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *             https://creativecommons.org/licenses/by/4.0/
 *
 * Unless required by applicable law or agreed to in writing, documentation
 * 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.onap.portalapp.music.conf;

import java.time.Duration;
import java.util.Map;

import org.springframework.session.Session;
import org.springframework.session.SessionRepository;
import org.springframework.session.events.SessionDeletedEvent;
import org.springframework.session.events.SessionExpiredEvent;


/**
 * A {@link SessionRepository} backed by a {@link java.util.Map} and that uses a
 * {@link MapSession}. The injected {@link java.util.Map} can be backed by a
 * distributed NoSQL store like Hazelcast, for instance. Note that the supplied
 * map itself is responsible for purging the expired sessions.
 *
 * <p>
 * The implementation does NOT support firing {@link SessionDeletedEvent} or
 * {@link SessionExpiredEvent}.
 * </p>
 *
 * @author SRIDHAR REDDY M
 * @since 1.0
 */
public class MusicSessionRepository  implements SessionRepository<MusicSession> {

	/**
	 * If non-null, this value is used to override
	 * {@link Session#setMaxInactiveInterval(Duration)}.
	 */
	private Integer defaultMaxInactiveInterval;

	
	private final MusicSessionRepositoryHandler sessionHandler;

	/**
	 * Creates a new instance backed by the provided {@link java.util.Map}. This
	 * allows injecting a distributed {@link java.util.Map}.
	 *
	 * @param sessions
	 *            the {@link java.util.Map} to use. Cannot be null.
	 */
	public MusicSessionRepository(MusicSessionRepositoryHandler handler) {
		this.sessionHandler = handler;
	}

	/**
	 * If non-null, this value is used to override
	 * {@link Session#setMaxInactiveInterval(Duration)}.
	 * 
	 * @param defaultMaxInactiveInterval
	 *            the number of seconds that the {@link Session} should be kept
	 *            alive between client requests.
	 */
	public void setDefaultMaxInactiveInterval(int defaultMaxInactiveInterval) {
		this.defaultMaxInactiveInterval = defaultMaxInactiveInterval;
	}

	@Override
	public void save(MusicSession session) {
		if (!session.getId().equals(session.getOriginalId())) {
			this.sessionHandler.remove(session.getOriginalId());
			session.setOriginalId(session.getId());
		}
		// this.sessionHandler.put(session.getId(), new MusicSession(session));
		this.sessionHandler.put(session.getId(), new MusicSession(session));
	}

	@Override
	public MusicSession findById(String id) {
		Session saved = this.sessionHandler.get(id);
		if (saved == null) {
			return null;
		}
		if (saved.isExpired()) {
			deleteById(saved.getId());
			return null;
		}
		//return sessionHandler.session(saved);
		return new MusicSession(saved);
	}

	@Override
	public void deleteById(String id) {
		this.sessionHandler.remove(id);
	}

	@Override
	public MusicSession createSession() {
		MusicSession result = new MusicSession();
		if (this.defaultMaxInactiveInterval != null) {
			result.setMaxInactiveInterval(Duration.ofSeconds(this.defaultMaxInactiveInterval));
		}
		return result;
	}

}