/**
 * Copyright (C) 2018 Christian Pierre MOMON <cmomon@april.org>
 *
 * This file is part of (April) Ememem.
 *
 * Ememem 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.
 *
 * Ememem 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 Ememem.  If not, see <http://www.gnu.org/licenses/>
 */
package org.april.hebdobot.bot.hooks;

import java.util.Collection;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.april.hebdobot.bot.Hebdobot;
import org.april.hebdobot.bot.review.Topic;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The Class MissingHook.
 */
public class MissingHook extends Hook
{
    private static final Logger logger = LoggerFactory.getLogger(MissingHook.class);

    /* (non-Javadoc)
     * @see org.april.hebdobot.bot.hooks.Hook#attemptProcess(org.april.hebdobot.bot.Hebdobot, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String)
     */
    @Override
    public boolean attemptProcess(final Hebdobot bot, final String channel, final String sender, final String login, final String hostname,
            final String message)
    {
        boolean result;

        if (StringUtils.equalsIgnoreCase(message, "!manquants"))
        {
            logger.info("!manquants caught.");

            // Missing.
            if (bot.getReview() == null)
            {
                bot.sendMessage("Pas de revue en cours.");
            }
            else
            {
                Topic topic = bot.getReview().getCurrentTopic();
                if (topic == null)
                {
                    bot.sendMessage("Aucun sujet traité");
                }
                else
                {
                    Collection<String> participants = bot.getReview().getParticipants();
                    Collection<String> currentParticipants = topic.getParticipants();

                    Collection<String> missing = CollectionUtils.subtract(participants, currentParticipants);
                    if (missing.isEmpty())
                    {
                        bot.sendMessage("Aucun participant manquant \\o/");
                    }
                    else
                    {
                        bot.sendMessage(
                                String.format("Les personnes participantes suivantes sont manquantes : %1s", StringUtils.join(missing, ", ")));
                    }
                }
            }

            result = true;
        }
        else
        {
            result = false;
        }

        //
        return result;
    }
}