/**
 * Copyright (C) 2018-2019 Christian Pierre MOMON <cmomon@april.org>
 *
 * 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.hooks;

import java.io.File;
import java.nio.charset.StandardCharsets;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringUtils;
import org.april.hebdobot.bot.Hebdobot;
import org.april.hebdobot.bot.review.ReviewReporter;
import org.april.hebdobot.bot.stats.ReviewData;
import org.april.hebdobot.bot.stats.ReviewDatas;
import org.april.hebdobot.bot.stats.ReviewDatasFile;
import org.april.hebdobot.bot.stats.ReviewStatsReporter;
import org.april.hebdobot.pastebin.PastebinClient;
import org.april.hebdobot.pastebin.Private;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

    public static String DEFAULT_SUFFIX = "-log-irc-revue-hebdomadaire.txt";

    /* (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.equalsAnyIgnoreCase(message, "!fin"))
        {
            logger.info("!fin caught.");

            // End.
            if (bot.getReview() == null)
            {
                bot.sendMessage(sender + ", pas de revue en cours.");
            }
            else if (!bot.getReview().isOwner(sender))
            {
                bot.sendMessage(sender + ", vous n'êtes pas le conducteur de la réunion");
            }
            else if (bot.getReview().getParticipants().size() == 0)
            {
                bot.sendMessage("Participation nulle détectée. La revue est ignorée.");
                bot.setReview(null);
            }
            else
            {
                //
                bot.getReview().endReview();

                // Load and update review statistics.
                ReviewDatas datas;
                try
                {
                    File reviewDataFile = new File(bot.getReviewDirectory(), "reviewstats.csv");
                    datas = ReviewDatasFile.load(reviewDataFile);
                    datas.clean();

                    ReviewData currentReviewData = new ReviewData(LocalDateTime.now(), bot.getReview().getParticipants().size(),
                            bot.getReview().getDurationInMinutes());

                    datas.add(currentReviewData);

                    if (bot.getReview().getParticipants().size() > 1)
                    {
                        ReviewDatasFile.append(reviewDataFile, currentReviewData);
                    }
                }
                catch (Exception exception)
                {
                    logger.warn("Exception during statistics work.", exception);
                    datas = null;
                }

                // Conclusion message in channel.
                String date = LocalDate.now().format(DateTimeFormatter.BASIC_ISO_DATE);
                String textReview = ReviewReporter.report(datas, bot.getReview());
                bot.sendMessage("% " + ReviewStatsReporter.reportReviewCount(datas));

                //
                if (bot.getPastebinSettings().isValid())
                {
                    logger.info("Pastebin the review.");
                    try
                    {
                        PastebinClient pastebinClient = new PastebinClient(bot.getPastebinSettings().getApiKey());

                        String pastebinUrl = pastebinClient.paste(textReview, "Revue APRIL " + date, Private.UNLISTED);

                        bot.sendMessage("% Compte-rendu de la revue : " + pastebinUrl);
                    }
                    catch (final Exception exception)
                    {
                        logger.error("Error during Pastebin submit.", exception);
                    }
                }

                //
                logger.info("Write review file.");
                File reviewFile = new File(bot.getReviewDirectory(), date + StringUtils.defaultString(bot.getReviewFileSuffix(), DEFAULT_SUFFIX));
                if (reviewFile.exists())
                {
                    LocalTime now = LocalTime.now();
                    String newSuffix = String.format("-%02dh%02d.txt", now.getHour(), now.getMinute());
                    reviewFile = new File(reviewFile.getAbsolutePath().replace(".txt", newSuffix));
                }
                try
                {
                    if (!bot.getReviewDirectory().exists())
                    {
                        logger.info("Create review directory: " + bot.getReviewDirectory().getAbsolutePath());
                        bot.getReviewDirectory().mkdirs();
                    }
                    FileUtils.writeStringToFile(reviewFile, textReview, StandardCharsets.UTF_8);
                    logger.info("File review saved in: [{}]", reviewFile.getAbsolutePath());
                }
                catch (final Exception exception)
                {
                    logger.error("Error during file writing", exception);
                }

                bot.sendMessage("% Durée de la revue : " + bot.getReview().getDurationInMinutes() + " minutes");
                bot.sendMessage("% Nombre de personnes participantes : " + bot.getReview().getParticipants().size());

                // Display statistics.
                bot.sendMessage("% " + ReviewStatsReporter.reportNewMaxUserCount(datas, bot.getReview().getParticipants().size()));
                bot.sendMessage(bot.getReview().getOwner(), ReviewStatsReporter.reportUserCount(datas, bot.getReview().getParticipants().size()));
                bot.sendMessage(bot.getReview().getOwner(), ReviewStatsReporter.reportDuration(datas, bot.getReview().getDurationInMinutes()));

                String participants = StringUtils.join(bot.getReview().getParticipants(), " ");
                bot.sendMessage("% " + participants + ", pensez à noter votre bénévalo : http://www.april.org/my?action=benevalo");

                String reminderMessage = String.format(
                        "%% %s, ne pas oublier d'ajouter le compte-rendu de la revue sur https://agir.april.org/issues/135 en utilisant comme nom de fichier %s",
                        bot.getReview().getOwner(), reviewFile.getName());
                logger.info("reminderMessage=[{}]", reminderMessage);
                bot.sendMessage(reminderMessage);

                // Finalize review.
                bot.sendMessage("% Fin de la revue hebdomadaire");
                bot.sendMessage(bot.getReview().getOwner(), "Revue finie.");

                bot.setReview(null);
            }

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

        //
        return result;
    }
}