/*-
 * ============LICENSE_START==========================================
 * ONAP Portal
 * ===================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 *
 * Modifications Copyright (C) 2019 IBM.
 * ===================================================================
 *
 * 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.controller;

import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;

@ServerEndpoint("/opencontact")
public class PeerBroadcastSocket {
    private static final EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(PeerBroadcastSocket.class);
    private static final ObjectMapper mapper = new ObjectMapper();

    private static final Map<String, Object> channelMap = new HashMap<>();
    private Map<String, String> sessionMap = new HashMap<>();

    @OnMessage
    public void message(String message, Session session) {
        try {
            Map<String, Object> jsonObject = mapper.readValue(message, Map.class);
            save(jsonObject, session);
        } catch (Exception ex) {
            logger.error(EELFLoggerDelegate.errorLogger, "Failed", ex);
        }
    }

    @OnOpen
    public void open(Session session) {
        logger.info(EELFLoggerDelegate.debugLogger, "Channel opened");
    }

    @OnClose
    public void close(Session session) {
        String channel = sessionMap.get(session.getId());
        if (channel != null) {
            Object sessObj = channelMap.get(channel);
            if (sessObj != null) {
                try {
                    ((Session) sessObj).close();
                } catch (IOException e) {
                    logger.error(EELFLoggerDelegate.errorLogger, "Failed to close", e);
                }
            }
            channelMap.remove(channel);
        }
        logger.info(EELFLoggerDelegate.debugLogger, "Channel closed");
    }

    private void save(Map<String, Object> jsonObject, Session session) {
        final Optional<String> from = Optional.of(jsonObject.get("from").toString());
        if (from.isPresent() && channelMap.get(from.get()) == null) {
            channelMap.put(from.toString(), session);
            this.sessionMap.put(session.getId(), from.toString());
        }
    }

}