/*
 * $Id$
 *
 * 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.struts2.showcase.chat;

import java.util.ArrayList;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

public class Room {

    private static final int MAX_CHAT_MESSAGES = 10;

    private String name;
    private String description;
    private Date creationDate;

    private List<ChatMessage> messages = new ArrayList<ChatMessage>();

    private Map<String, User> members = new LinkedHashMap<String, User>();

    public Room(String name, String description) {
        this.name = name;
        this.description = description;
        this.creationDate = new Date(System.currentTimeMillis());
    }


    // properties
    public Date getCreationDate() {
        return creationDate;
    }

    public String getDescription() {
        return description;
    }

    public String getName() {
        return name;
    }


    // (behaviour) members
    public List<User> getMembers() {
        return new ArrayList<User>(members.values());
    }
    public User findMember(String name) {
        assert(name != null);
        return members.get(name);
    }
    public boolean hasMember(String name) {
        assert(name != null);
        return members.containsKey(name);
    }
    public void memberEnter(User member) {
        assert(member != null);
        if (! hasMember(member.getName())) {
            members.put(member.getName(), member);
        }
    }

    public void memberExit(String memberName) {
        assert(memberName != null);
        assert(memberName.trim().length() > 0);
        members.remove(memberName);
    }


    // (behaviour) chat messags
    public void addMessage(ChatMessage chatMessage) {
        if (messages.size() > MAX_CHAT_MESSAGES) {
            // messages.remove(messages.size() - 1);
            messages.remove(0);
        }
        messages.add(chatMessage);
    }

    public List<ChatMessage> getChatMessages() {
        return new ArrayList<ChatMessage>(messages);
    }

}
