/**
 * Copyright (C) 2017-2021 Christian Pierre MOMON <cmomon@april.org>
 * Copyright (C) 2011-2013 Nicolas Vinot <aeris@imirhil.fr>
 *
 * This file is part of (April) Hebdobot.
 *
 * Hebdobot is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Hebdobot is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Hebdobot.  If not, see <http://www.gnu.org/licenses/>
 */
package org.april.hebdobot.bot.review;

import fr.devinsy.strings.StringSet;

/**
 * The Class IndividualTopic.
 */
public class IndividualTopic extends Topic
{
    private final MessageMap messages;

    /**
     * Instantiates a new individual topic.
     *
     * @param title
     *            the title
     */
    public IndividualTopic(final String title)
    {
        super(title);

        this.messages = new MessageMap();
    }

    /* (non-Javadoc)
     * @see org.april.hebdobot.review.Topic#add(org.april.hebdobot.review.Message)
     */
    @Override
    public void add(final Message message)
    {
        final String author = message.getAuthor();
        if (!this.messages.containsKey(author))
        {
            this.messages.put(author, new Messages());
        }
        this.messages.get(author).add(message);
    }

    /* (non-Javadoc)
     * @see org.april.hebdobot.bot.review.Topic#cancelPrevious(java.lang.String)
     */
    @Override
    public String cancelPreviousMessage(final String participant)
    {
        String result;

        Messages authorMessages = this.messages.get(participant);
        if (authorMessages == null)
        {
            result = null;
        }
        else
        {
            Message removed = authorMessages.removeLast();
            result = removed.getContent();
        }

        //
        return result;
    }

    /**
     * Gets the messages.
     *
     * @param author
     *            the author
     * @return the messages
     */
    public Messages getMessages(final String author)
    {
        Messages result;

        result = this.messages.get(author);

        //
        return result;
    }

    /* (non-Javadoc)
     * @see org.april.hebdobot.review.Topic#getParticipants()
     */
    @Override
    public StringSet getParticipants()
    {
        StringSet result;

        result = new StringSet(this.messages.keySet());

        //
        return result;
    }

    /**
     * Checks for message.
     *
     * @param participant
     *            the participant
     * @return true, if successful
     */
    @Override
    public boolean hasMessage(final String participant)
    {
        boolean result;

        Messages messages = this.messages.get(participant);

        if ((messages == null) || (messages.isEmpty()))
        {
            result = false;
        }
        else
        {
            result = true;
        }

        //
        return result;
    }

    /**
     * Checks for participant.
     *
     * @param participant
     *            the participant
     * @return true, if successful
     */
    public boolean hasParticipant(final String participant)
    {
        boolean result;

        result = this.messages.containsKey(participant);

        //
        return result;
    }
}