/*
 *
 *  *  Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
 *  *
 *  *  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.
 *  *
 *  * For more information: http://www.orientechnologies.com
 *
 */
package com.orientechnologies.orient.client.remote;

import com.orientechnologies.orient.core.db.ODatabaseSessionMetadata;
import com.orientechnologies.orient.enterprise.channel.binary.OChannelBinary;

import java.util.*;

/**
 * Created by tglman on 31/03/16.
 */
public class OStorageRemoteSession implements ODatabaseSessionMetadata {
  boolean                                commandExecuting       = false;
  int                                    serverURLIndex         = -1;
  String                                 connectionUserName     = null;
  String                                 connectionUserPassword = null;
  Map<String, OStorageRemoteNodeSession> sessions               = new HashMap<String, OStorageRemoteNodeSession>();

  private Set<OChannelBinary>            connections            = Collections
      .newSetFromMap(new WeakHashMap<OChannelBinary, Boolean>());
  private final int                      uniqueClientSessionId;
  private boolean                        closed                 = true;

  public OStorageRemoteSession(final int sessionId) {
    this.uniqueClientSessionId = sessionId;
  }

  public boolean hasConnection(final OChannelBinary connection) {
    return connections.contains(connection);
  }

  public OStorageRemoteNodeSession getServerSession(final String serverURL) {
    return sessions.get(serverURL);
  }

  public synchronized OStorageRemoteNodeSession getOrCreateServerSession(final String serverURL) {
    OStorageRemoteNodeSession session = sessions.get(serverURL);
    if (session == null) {
      session = new OStorageRemoteNodeSession(serverURL, uniqueClientSessionId);
      sessions.put(serverURL, session);
      closed = false;
    }
    return session;
  }

  public void addConnection(final OChannelBinary connection) {
    connections.add(connection);
  }

  public void close() {
    commandExecuting = false;
    serverURLIndex = -1;
    connections = new HashSet<OChannelBinary>();
    sessions = new HashMap<String, OStorageRemoteNodeSession>();
    closed = true;
  }

  public boolean isClosed() {
    return closed;
  }

  public Integer getSessionId() {
    if (sessions.isEmpty())
      return -1;
    final OStorageRemoteNodeSession curSession = sessions.values().iterator().next();
    return curSession.getSessionId();
  }

  public String getServerUrl() {
    if (sessions.isEmpty())
      return null;
    final OStorageRemoteNodeSession curSession = sessions.values().iterator().next();
    return curSession.getServerURL();
  }

  public synchronized void removeServerSession(final String serverURL) {
    sessions.remove(serverURL);
  }

  public synchronized Collection<OStorageRemoteNodeSession> getAllServerSessions() {
    return sessions.values();
  }
}