/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You 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 org.apache.geode.modules.session.internal.filter;

import org.apache.geode.modules.session.internal.filter.attributes.AbstractSessionAttributes;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;

/**
 * Class which fakes an in-memory basic session manager for testing purposes.
 */
public class DummySessionManager implements SessionManager {

  /**
   * Map of sessions
   */
  private final Map<String, HttpSession> sessions = new HashMap<String, HttpSession>();

  private class Attributes extends AbstractSessionAttributes {

    @Override
    public Object putAttribute(String attr, Object value) {
      return attributes.put(attr, value);
    }

    @Override
    public Object removeAttribute(String attr) {
      return attributes.remove(attr);
    }
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void start(Object config, ClassLoader loader) {}

  /**
   * {@inheritDoc}
   */
  @Override
  public void stop() {}

  /**
   * {@inheritDoc}
   */
  @Override
  public HttpSession getSession(String id) {
    return sessions.get(id);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public HttpSession wrapSession(ServletContext context, int maxInactiveInterval) {
    String id = generateId();
    AbstractSessionAttributes attributes = new Attributes();
    GemfireHttpSession session = new GemfireHttpSession(id, context);
    session.setManager(this);
    session.setAttributes(attributes);
    sessions.put(id, session);

    return session;
  }


  /**
   * {@inheritDoc}
   */
  @Override
  public void putSession(HttpSession session) {
    // shouldn't ever get called
    throw new UnsupportedOperationException("Not supported yet.");
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void destroySession(String id) {
    sessions.remove(id);
  }

  public String getSessionCookieName() {
    return "JSESSIONID";
  }

  public String getJvmId() {
    return "jvm-id";
  }

  /**
   * Generate an ID string
   */
  private String generateId() {
    return UUID.randomUUID().toString().toUpperCase() + "-GF";
  }
}
