/*
 * Copyright (C) 2008-2024, Juick
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.juick.service;

import com.juick.model.*;
import com.juick.model.User;
import com.juick.www.WebApp;
import com.juick.util.MessageUtils;
import com.juick.util.TagUtils;

import io.pebbletemplates.pebble.PebbleEngine;
import io.pebbletemplates.pebble.template.PebbleTemplate;
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.dao.IncorrectResultSizeDataAccessException;
import org.springframework.jdbc.core.BatchPreparedStatementSetter;
import org.springframework.jdbc.core.ConnectionCallback;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.SqlParameterSource;
import org.springframework.jdbc.core.simple.SimpleJdbcInsert;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.lang.NonNull;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import javax.inject.Inject;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.net.URI;
import java.sql.*;
import java.time.Instant;
import java.time.ZoneOffset;
import java.time.temporal.ChronoUnit;
import java.util.*;
import java.util.stream.Collectors;

/**
 * Created by aalexeev on 11/13/16.
 */
@Repository
public class MessagesServiceImpl extends BaseJdbcService implements MessagesService {
    private static final Logger logger = LoggerFactory.getLogger(MessagesServiceImpl.class);
    @Inject
    private UserService userService;
    @Inject
    private TagService tagService;
    @Inject
    private SearchService searchService;
    @Inject
    private StorageService storageService;
    @Inject
    private WebApp webApp;
    @Value("${photos_url:https://i.juick.com/}")
    private String baseImagesUrl;
    @Inject
    private User archiveUser;
    @Inject
    private PebbleEngine pebbleEngine;

    private class MessageMapper implements RowMapper<Message> {
        @Override
        public Message mapRow(ResultSet rs, int rowNum) throws SQLException {
            Message msg = new Message();
            msg.setMid(rs.getInt(1));
            msg.setRid(rs.getInt(2));
            msg.setReplyto(rs.getInt(3));
            User user = new User();
            user.setUid(rs.getInt(4));
            user.setName(Optional.ofNullable(rs.getString(5)).orElse(AnonymousUser.INSTANCE.getName()));
            user.setBanned(rs.getBoolean(6));
            user.setUri(URI.create(Optional.ofNullable(rs.getString(22)).orElse(StringUtils.EMPTY)));
            user.setPremium(rs.getInt("premium") > 0);
            msg.setUser(user);
            msg.setCreated(MessagesServiceImpl.this.getOffsetDateTime(rs, 7).toInstant());
            msg.ReadOnly = rs.getBoolean(8);
            msg.setPrivacy(rs.getInt(9));
            msg.setFriendsOnly(msg.getPrivacy() < 0);
            msg.setReplies(rs.getInt(10));
            msg.setAttachmentType(rs.getString(11));
            msg.Hidden = rs.getBoolean(13);
            msg.setRepliesBy(rs.getString(15));
            msg.setText(rs.getString(16));
            msg.setReplyQuote(MessageUtils.formatQuote(rs.getString(17)));
            msg.setUpdated(MessagesServiceImpl.this.getOffsetDateTime(rs, 18).toInstant());
            int quoteUid = rs.getInt(19);
            User quoteUser = new User();
            quoteUser.setUid(quoteUid);
            quoteUser.setName(rs.getString(20));
            if (quoteUid == 0) {
                quoteUser.setName(AnonymousUser.INSTANCE.getName());
                quoteUser.setUri(URI.create(Optional.ofNullable(rs.getString(23)).orElse(StringUtils.EMPTY)));
            } else {
                quoteUser.setAvatar(webApp.getAvatarUrl(quoteUser));
            }
            msg.setTo(quoteUser);
            msg.setUpdatedAt(MessagesServiceImpl.this.getOffsetDateTime(rs, 21).toInstant());
            msg.setReplyUri(URI.create(Optional.ofNullable(rs.getString(24)).orElse(StringUtils.EMPTY)));
            msg.setHtml(rs.getBoolean(25));
            msg.setUnread(rs.getInt(26) > 0);
            msg.setSubscribed(rs.getInt("subscribed") > 0);
            if (StringUtils.isNotEmpty(msg.getAttachmentType())) {
                try {
                    storageService.setAttachmentMetadata(baseImagesUrl, msg);
                } catch (Exception e) {
                    logger.warn("exception reading images for mid {} rid {}", msg.getMid(), msg.getRid(), e);
                }
            }
            return msg;
        }
    }

    private final MessageMapper messageMapper = new MessageMapper();

    /**
     * @see <a href=
     * "https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-reference-type-conversions.html">Java,
     * JDBC and MySQL Types</a>
     */
    @Transactional
    @Override
    public int createMessage(final int uid, final String txt, final String attachment, @NonNull final Set<Tag> tags) {
        var now = Instant.now();
        var query = returningId("""
                INSERT INTO messages(user_id, attach, ts, readonly, updated, txt, updated_at)""",
                "VALUES(?, ?, ?, ?, ?, ?, ?)", "message_id");
        Integer mid = getJdbcTemplate().execute((ConnectionCallback<Integer>) con -> {
            var nowObject = toDateTime(now.atOffset(ZoneOffset.UTC));
            var stmt = con.prepareStatement(query);
            stmt.setInt(1, uid);
            stmt.setString(2, attachment);
            stmt.setObject(3, nowObject, dateTimeType());
            stmt.setBoolean(4, TagUtils.hasTag(tags, "readonly"));
            stmt.setObject(5, nowObject, dateTimeType());
            stmt.setObject(6, StringUtils.defaultString(txt));
            stmt.setObject(7, nowObject, dateTimeType());

            try (var resultSet = stmt.executeQuery()) {
                if (resultSet.next()) {
                    return resultSet.getInt(1);
                }
                return 0;
            }
        });
        if (mid != null && mid > 0) {
            if (CollectionUtils.isNotEmpty(tags)) {
                var newTags = new ArrayList<>(tags);
                getJdbcTemplate().batchUpdate("INSERT INTO messages_tags(message_id, tag_id) VALUES (?, ?)",
                        new BatchPreparedStatementSetter() {
                            @Override
                            public void setValues(PreparedStatement ps, int i) throws SQLException {
                                ps.setInt(1, mid);
                                ps.setInt(2, newTags.get(i).getId());
                            }

                            @Override
                            public int getBatchSize() {
                                return tags.size();
                            }
                        });
            }
            getNamedParameterJdbcTemplate()
                    .update("UPDATE users SET lastmessage=:lastmessage, last_seen=:last_seen where id=:uid",
                            new MapSqlParameterSource()
                                    .addValue("lastmessage", toDateTime(now.atOffset(ZoneOffset.UTC)),
                                            dateTimeType())
                                    .addValue("last_seen", toDateTime(now.atOffset(ZoneOffset.UTC)),
                                            dateTimeType())
                                    .addValue("uid", uid));
        }
        return mid;
    }

    /**
     * @param mid
     * @param rid
     * @param user
     * @param txt
     * @param attachment
     * @return
     * @see <a href=
     * "https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-reference-type-conversions.html">Java,
     * JDBC and MySQL Types</a>
     */
    @Transactional
    @Override
    public int createReply(final int mid, final int rid, final User user, final String txt, final String attachment) {
        int ridnew = getReplyIDIncrement(mid, user.getUid());
        if (ridnew > 0) {
            var now = Instant.now();
            getNamedParameterJdbcTemplate()
                    .update(
                            "INSERT INTO replies(message_id, reply_id, user_id, replyto, attach, txt, ts, updated_at, user_uri) "
                                    + "VALUES (:mid, :rid, :uid, :replyto, :attach, :txt, :ts, :updated_at, :user_uri)",
                            new MapSqlParameterSource()
                                    .addValue("mid", mid)
                                    .addValue("rid", ridnew)
                                    .addValue("uid", user.getUid())
                                    .addValue("replyto", rid)
                                    .addValue("attach", attachment)
                                    .addValue("txt", txt)
                                    .addValue("ts", toDateTime(now.atOffset(ZoneOffset.UTC)),
                                            dateTimeType())
                                    .addValue("updated_at", toDateTime(now.atOffset(ZoneOffset.UTC)),
                                            dateTimeType())
                                    .addValue("user_uri", user.getUri().toASCIIString()));

            getNamedParameterJdbcTemplate()
                    .update(
                            "UPDATE messages SET replies = replies + 1, updated=:updated WHERE message_id = :message_id",
                            new MapSqlParameterSource()
                                    .addValue("updated", toDateTime(now.atOffset(ZoneOffset.UTC)),
                                            dateTimeType())
                                    .addValue("message_id", mid));
            setLastReadComment(user, mid, ridnew);
            getNamedParameterJdbcTemplate()
                    .update("UPDATE users SET lastmessage=:lastmessage, last_seen=:last_seen where id=:uid",
                            new MapSqlParameterSource()
                                    .addValue("lastmessage", toDateTime(now.atOffset(ZoneOffset.UTC)),
                                            dateTimeType())
                                    .addValue("last_seen", toDateTime(now.atOffset(ZoneOffset.UTC)),
                                            dateTimeType())
                                    .addValue("uid", user.getUid()));
        }
        return ridnew;
    }

    public int getReplyIDIncrement(final int mid, final int uid) {
        return getJdbcTemplate().execute((ConnectionCallback<Integer>) conn -> {
            conn.setAutoCommit(false);
            int replyNo;
            final boolean readOnly;
            final int userId;
            try (PreparedStatement ps = conn.prepareStatement(
                    "SELECT maxreplyid+1, readonly, user_id FROM messages WHERE message_id=? " + forUpdate())) {
                ps.setInt(1, mid);
                try (ResultSet resultSet = ps.executeQuery()) {
                    if (resultSet.next()) {
                        replyNo = resultSet.getInt(1);
                        readOnly = resultSet.getBoolean(2);
                        userId = resultSet.getInt(3);
                    } else {
                        throw new IncorrectResultSizeDataAccessException(
                                "while getting getReplyIDIncrement, mid=" + mid, 1, 0);
                    }
                }
            }
            // author can reply to his readonly post
            if (!readOnly || uid == userId) {
                try (PreparedStatement ps = conn
                        .prepareStatement("UPDATE messages SET maxreplyid=? WHERE message_id=?")) {
                    ps.setInt(1, replyNo);
                    ps.setInt(2, mid);
                    if (ps.executeUpdate() != 1) {
                        throw new IncorrectResultSizeDataAccessException("Cannot find a message to update: " + mid, 1,
                                0);
                    }
                }
            } else {
                replyNo = -1;
            }
            conn.commit();
            return replyNo;
        });

    }

    @Transactional
    void updateRepliesBy(int mid) {
        List<String> users = getJdbcTemplate().queryForList("SELECT users.nick FROM replies "
                        + "INNER JOIN users ON replies.user_id=users.id WHERE replies.message_id=? "
                        + "GROUP BY replies.user_id, users.nick ORDER BY COUNT(replies.reply_id) DESC " + limit(5), String.class,
                mid);
        String result = users.stream().map(u -> "@" + u).collect(Collectors.joining(","));
        getJdbcTemplate().update("UPDATE messages SET repliesby=? WHERE message_id=?", result, mid);
    }

    @Transactional
    @Override
    public RecommendStatus recommendMessage(final int mid, final int vuid, final String userUri) {
        logger.info("Message {} recommended by {} ({})", mid, vuid, userUri);
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("uid", vuid)
                .addValue("uri", userUri).addValue("like_id", Reaction.LIKE).addValue("mid", mid);
        int wasDeleted = getNamedParameterJdbcTemplate().update(
                "DELETE FROM favorites WHERE user_id=:uid AND message_id=:mid AND like_id=:like_id AND user_uri=:uri",
                sqlParameterSource);
        if (wasDeleted > 0) {
            return RecommendStatus.Deleted;
        } else {
            var now = toDateTime(Instant.now().atOffset(ZoneOffset.UTC));
            boolean wasAdded = getNamedParameterJdbcTemplate().update("""
                        INSERT INTO favorites(user_id, message_id, ts, like_id, user_uri)
                        VALUES (:user_id, :message_id, :ts, :like_id, :user_uri)
                    """, new MapSqlParameterSource()
                    .addValue("user_id", vuid)
                    .addValue("message_id", mid)
                    .addValue("ts", now, dateTimeType())
                    .addValue("like_id", Reaction.LIKE)
                    .addValue("user_uri", userUri)) == 1;
            if (wasAdded) {
                return RecommendStatus.Added;
            }
        }
        return RecommendStatus.Error;
    }

    @Override
    public RecommendStatus recommendMessage(int mid, int vuid) {
        return recommendMessage(mid, vuid, StringUtils.EMPTY);
    }

    @Override
    public List<Reaction> listReactions() {
        return jdbcTemplate.query("SELECT like_id, description FROM reactions", (rs, rowNum) -> {
            Reaction reaction = new Reaction(rs.getInt("like_id"));
            reaction.setDescription(rs.getString("description"));
            return reaction;
        });
    }

    @Override
    public RecommendStatus likeMessage(int mid, int vuid, Integer reaction) {
        return likeMessage(mid, vuid, reaction, StringUtils.EMPTY);
    }

    @Transactional
    @Override
    public RecommendStatus likeMessage(int mid, int vuid, Integer reaction, String userUri)
            throws IllegalArgumentException {
        if (reaction == null) {
            SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("uid", vuid)
                    .addValue("uri", userUri).addValue("mid", mid);
            boolean wasDeleted = getNamedParameterJdbcTemplate().update(
                    "DELETE FROM favorites WHERE user_id=:uid AND message_id=:mid AND user_uri=:uri",
                    sqlParameterSource) > 0;
            if (wasDeleted) {
                return RecommendStatus.Deleted;
            } else {
                return RecommendStatus.Error;
            }
        }
        boolean wasAdded = getJdbcTemplate().update(
                "INSERT INTO favorites(user_id, message_id, ts, like_id, user_uri) VALUES (?, ?, ?, ?, ?)",
                vuid,
                mid, toDateTime(Instant.now().atOffset(ZoneOffset.UTC)), reaction, userUri) == 1;
        if (wasAdded) {
            return RecommendStatus.Added;
        }

        return RecommendStatus.Error;
    }

    @Transactional(readOnly = true)
    @Override
    public boolean canViewThread(final int mid, final int uid) {
        List<PrivacyOpts> list = getJdbcTemplate().query("SELECT user_id, privacy FROM messages WHERE message_id = ?",
                (rs, rowNum) -> {
                    PrivacyOpts res = new PrivacyOpts();

                    res.setUid(rs.getInt(1));
                    res.setPrivacy(rs.getInt(2));

                    return res;
                }, mid);

        PrivacyOpts privacyOpts = list.isEmpty() ? null : list.get(0);

        return privacyOpts == null || privacyOpts.getPrivacy() >= 0 || uid == privacyOpts.getUid()
                || ((privacyOpts.getPrivacy() == -1 || privacyOpts.getPrivacy() == -2) && uid > 0
                && userService.isInWL(privacyOpts.getUid(), uid));
    }

    @Transactional(readOnly = true)
    @Override
    public boolean isReadOnly(final int mid) {
        List<Integer> list = getJdbcTemplate().queryForList("SELECT readonly FROM messages WHERE message_id = ?",
                Integer.class, mid);

        return !list.isEmpty() && list.get(0) == 1;
    }

    @Override
    public void setReadOnly(final int mid, final boolean readonly) {
        getJdbcTemplate().update("UPDATE messages SET readonly=? WHERE message_id=?", readonly, mid);
    }

    @Transactional(readOnly = true)
    @Override
    public int getMessagePrivacy(final int mid) {
        List<Integer> list = getJdbcTemplate().queryForList("SELECT privacy FROM messages WHERE message_id = ?",
                Integer.class, mid);

        return list.isEmpty() ? -4 : list.get(0);
    }

    public Optional<Message> getMessage(int mid) {
        return getMessage(0, mid);
    }

    @Transactional(readOnly = true)
    @Override
    public Optional<Message> getMessage(int uid, final int mid) {
        var messages = getMessages(uid, List.of(mid));
        if (messages.size() == 1) {
            var message = messages.get(0);
            if (!message.getUser().isBanned()) {
                return Optional.of(messages.get(0));
            }
        }
        return Optional.empty();
    }

    @Transactional(readOnly = true)
    @Override
    public Message getReply(final int mid, final int rid) {
        var sql = """
                SELECT replies.user_id, users.nick,
                replies.replyto, replies.ts, replies.attach, replies.txt, COALESCE(q.txt,m.txt, '') as quote,
                COALESCE(q.user_id, m.user_id) AS to_uid, COALESCE(qu.nick, mu.nick) AS to_name,
                replies.updated_at, replies.user_uri as uri,
                q.user_uri AS to_uri, replies.reply_uri AS reply_uri, replies.html, q.reply_uri
                FROM replies LEFT JOIN users ON replies.user_id = users.id
                LEFT JOIN replies q ON replies.message_id = q.message_id and replies.replyto = q.reply_id
                LEFT JOIN messages m ON replies.message_id = m.message_id
                LEFT JOIN users qu ON q.user_id=qu.id LEFT JOIN users mu ON m.user_id=mu.id
                WHERE replies.message_id = ? AND replies.reply_id = ?
                """;
        List<Message> list = getJdbcTemplate().query(sql, (rs, num) -> {
            Message msg = new Message();

            msg.setMid(mid);
            msg.setRid(rid);
            msg.setUser(new User());
            msg.getUser().setUid(rs.getInt(1));
            msg.getUser().setName(rs.getString(2));
            if (msg.getUser().getUid() == 0) {
                msg.getUser().setName(AnonymousUser.INSTANCE.getName());
                msg.getUser()
                        .setUri(URI.create(Optional.ofNullable(rs.getString(11)).orElse(StringUtils.EMPTY)));
            }
            msg.setReplyto(rs.getInt(3));
            msg.setCreated(getOffsetDateTime(rs, 4).toInstant());
            msg.setAttachmentType(rs.getString(5));
            msg.setText(rs.getString(6));
            String quote = rs.getString(7);

            if (!StringUtils.isEmpty(quote)) {
                msg.setReplyQuote(MessageUtils.formatQuote(quote));
            }
            int quoteUid = rs.getInt(8);
            User quoteUser = new User();
            quoteUser.setUid(quoteUid);
            quoteUser.setName(Optional.ofNullable(rs.getString(9)).orElse(AnonymousUser.INSTANCE.getName()));
            quoteUser.setUri(URI.create(Optional.ofNullable(rs.getString(12)).orElse(StringUtils.EMPTY)));
            msg.setTo(quoteUser);
            msg.setUpdatedAt(getOffsetDateTime(rs, 10).toInstant());
            msg.setReplyUri(URI.create(Optional.ofNullable(rs.getString(13)).orElse(StringUtils.EMPTY)));
            msg.setHtml(rs.getBoolean(14));
            msg.setReplyToUri(URI.create(Optional.ofNullable(rs.getString(15)).orElse(StringUtils.EMPTY)));
            if (StringUtils.isNotEmpty(msg.getAttachmentType())) {
                try {
                    storageService.setAttachmentMetadata(baseImagesUrl, msg);
                } catch (Exception e) {
                    logger.warn("exception reading images for mid {} rid {}", msg.getMid(), msg.getRid(), e);
                }
            }
            msg.setEntities(MessageUtils.getEntities(msg));
            return msg;
        }, mid, rid);

        return list.isEmpty() ? null : list.get(0);
    }

    @Override
    public Message getReplyByUri(String replyUri) {
        List<Message> replies = getJdbcTemplate().query("SELECT message_id, reply_id from replies WHERE reply_uri=?",
                (rs, rowNum) -> getReply(rs.getInt(1), rs.getInt(2)), replyUri);
        return replies.isEmpty() ? null : replies.get(0);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Pair<Integer, User>> getMessagesRecommendations(final int visitorUid, final Collection<Integer> mids) {
        return getNamedParameterJdbcTemplate().query(
                "SELECT DISTINCT favorites.message_id, users.id, users.nick, favorites.user_uri FROM favorites "
                        + "INNER JOIN users ON (favorites.user_id = users.id) "
                        + "INNER JOIN messages m ON favorites.message_id=m.message_id WHERE favorites.like_id=1 "
                        + "AND NOT EXISTS (SELECT 1 FROM bl_users WHERE "
                        + "(user_id = favorites.user_id AND bl_user_id = m.user_id) "
                        + "OR (user_id = m.user_id AND bl_user_id = favorites.user_id) "
                        + (visitorUid > 0 ? " OR (user_id = :visitorUid AND favorites.user_id = bl_user_id)" : "")
                        + ") "
                        + "AND favorites.message_id IN (:mids)",
                new MapSqlParameterSource("mids", mids).addValue("visitorUid", visitorUid), (rs, rowNum) -> {
                    User user = new User();
                    user.setUid(rs.getInt(2));
                    var uri = URI.create(rs.getString(4));
                    if (StringUtils.isEmpty(uri.toASCIIString())) {
                        user.setName(rs.getString(3));
                    } else {
                        user.setUri(uri);
                        String path = uri.getPath();
                        String name = path.substring(path.lastIndexOf('/') + 1);
                        user.setName(name + "@" + uri.getHost());
                    }
                    return new ImmutablePair<>(rs.getInt(1), user);
                });
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getAll(final int visitorUid, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("before", before)
                .addValue("visitorUid", visitorUid);

        return getNamedParameterJdbcTemplate().queryForList("SELECT m.message_id FROM messages m WHERE "
                        + (before > 0 ? " m.message_id < :before AND " : StringUtils.EMPTY) + " m.hidden = 0 AND (m.privacy > 0"
                        + (visitorUid > 0 ? " OR m.user_id = :visitorUid) AND NOT EXISTS ("
                        + " SELECT 1 FROM bl_users b WHERE b.user_id = :visitorUid AND b.bl_user_id = m.user_id)" : ")")
                        + " AND NOT EXISTS (SELECT 1 FROM bl_tags bt WHERE bt.tag_id IN "
                        + "(SELECT tag_id FROM messages_tags WHERE message_id = m.message_id) and :visitorUid = bt.user_id)"
                        + " AND NOT EXISTS (SELECT 1 from users u WHERE u.banned = 1 and u.id = m.user_id and u.id <> :visitorUid)" +
                        " ORDER BY m.message_id DESC " + limit(20),
                sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getTag(final int tid, final int visitorUid, final int before, final int cnt) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("tid", tid)
                .addValue("before", before)
                .addValue("visitorUid", visitorUid);

        return getNamedParameterJdbcTemplate()
                .queryForList("SELECT messages.message_id FROM (tags INNER JOIN messages_tags "
                        + "ON ((tags.synonym_id = :tid OR tags.tag_id = :tid) AND tags.tag_id = messages_tags.tag_id)) "
                        + "INNER JOIN messages ON messages.message_id = messages_tags.message_id WHERE "
                        + (before > 0 ? " messages.message_id < :before AND " : StringUtils.EMPTY)
                        + "(messages.privacy > 0 OR messages.user_id = :visitorUid) "
                        + "AND NOT EXISTS (SELECT 1 FROM bl_users b WHERE b.user_id = :visitorUid and b.bl_user_id = messages.user_id) "
                        + "ORDER BY messages.message_id DESC " + limit(cnt), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getTags(final String tids, final int visitorUid, final int before, final int cnt) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("before", before)
                .addValue("visitorUid", visitorUid);

        return getNamedParameterJdbcTemplate().queryForList("SELECT messages.message_id FROM messages_tags "
                + "INNER JOIN messages USING(message_id) WHERE messages_tags.tag_id IN (" + tids + ") "
                + (before > 0 ? " AND messages.message_id < :before " : StringUtils.EMPTY)
                + " AND (messages.privacy > 0 OR messages.user_id = :visitorUid) "
                + "ORDER BY messages.message_id DESC " + limit(cnt), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getPlace(final int placeId, final int visitorUid, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("placeId", placeId)
                .addValue("before", before).addValue("visitorUid", visitorUid);

        return getNamedParameterJdbcTemplate().queryForList(
                "SELECT message_id FROM messages WHERE place_id = :placeId "
                        + (before > 0 ? " AND message_id < :before " : StringUtils.EMPTY)
                        + " AND (privacy > 0 OR user_id = :visitorUid) ORDER BY message_id DESC " + limit(20),
                sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getMyFeed(final int uid, final int before, boolean recommended) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("uid", uid).addValue("before",
                before);

        return getNamedParameterJdbcTemplate().queryForList("SELECT message_id FROM messages WHERE "
                + "(user_id=:uid OR " + "(EXISTS (SELECT 1 FROM subscr_users WHERE subscr_users.suser_id = :uid "
                + "AND subscr_users.user_id = messages.user_id) "
                + "AND NOT EXISTS (SELECT 1 FROM bl_tags bt WHERE bt.tag_id IN "
                + "(SELECT tag_id FROM messages_tags WHERE message_id = messages.message_id) AND :uid = bt.user_id) "
                + "AND (privacy >= 0 OR (privacy >= -2 AND privacy <= -1 "
                + "AND EXISTS (SELECT 1 FROM wl_users w WHERE w.wl_user_id = :uid and w.user_id = messages.user_id)))) "
                + (recommended ? "OR (EXISTS (SELECT 1 FROM favorites WHERE favorites.message_id=messages.message_id "
                + "AND favorites.user_id IN (SELECT user_id FROM subscr_users WHERE suser_id=:uid)) "
                + "AND NOT EXISTS (SELECT 1 FROM bl_tags bt WHERE bt.tag_id IN (SELECT tag_id FROM messages_tags "
                + "WHERE message_id = messages.message_id) and :uid = bt.user_id) "
                + "AND (privacy >= 0 OR (privacy >= -2 AND privacy <= -1 "
                + "AND EXISTS (SELECT 1 FROM wl_users w "
                + "WHERE w.wl_user_id = :uid and w.user_id = messages.user_id)))) "
                + "AND NOT EXISTS (SELECT 1 FROM bl_users b WHERE b.user_id = :uid and b.bl_user_id = messages.user_id)"
                : StringUtils.EMPTY)
                + ") " + (before > 0 ? "AND message_id < :before " : StringUtils.EMPTY)
                + "ORDER BY message_id DESC " + limit(20), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getPrivate(final int uid, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("uid", uid).addValue("before",
                before);

        return getNamedParameterJdbcTemplate()
                .queryForList("SELECT message_id FROM messages WHERE user_id = :uid AND privacy < 0"
                        + (before > 0 ? " AND message_id < :before " : StringUtils.EMPTY)
                        + "ORDER BY message_id DESC " + limit(20), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getDiscussions(final int uid, final Long to) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("uid", uid)
                .addValue("to", fromEpochMilli(to), dateTimeType());
        if (uid == 0) {
            return getNamedParameterJdbcTemplate().query(
                    "SELECT message_id FROM messages WHERE " + (to != 0 ? " updated < :to AND" : StringUtils.EMPTY)
                            + " NOT EXISTS (SELECT 1 from users u WHERE u.banned = 1"
                            + " AND u.id = messages.user_id and u.id <> :uid)"
                            + " AND privacy >= 0"
                            + " ORDER BY updated DESC, message_id DESC " + limit(20),
                    sqlParameterSource, (rs, rowNum) -> rs.getInt(1));
        }
        return getNamedParameterJdbcTemplate().query(
                "SELECT messages.message_id, messages.updated FROM subscr_messages "
                        + "INNER JOIN messages ON messages.message_id=subscr_messages.message_id "
                        + "WHERE suser_id = :uid " + (to != 0 ? "AND updated < :to " : StringUtils.EMPTY)
                        + "AND (messages.privacy >= 0 OR (messages.privacy >= -2 AND messages.privacy <= -1 "
                        + "AND EXISTS (SELECT 1 FROM wl_users w "
                        + "WHERE w.wl_user_id = :uid and w.user_id = messages.user_id)))"
                        + " AND NOT EXISTS (SELECT 1 from users u WHERE u.banned = 1"
                        + " AND u.id = messages.user_id and u.id <> :uid) "
                        + "ORDER BY updated DESC, messages.message_id DESC " + limit(20),
                sqlParameterSource, (rs, rowNum) -> rs.getInt(1));
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getRecommended(final int uid, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("uid", uid).addValue("before",
                before);

        return getNamedParameterJdbcTemplate().queryForList("SELECT f.message_id FROM favorites f WHERE "
                + "EXISTS (SELECT 1 FROM subscr_users s WHERE s.suser_id = :uid and f.user_id = s.user_id)"
                + (before > 0 ? " AND f.message_id < :before " : StringUtils.EMPTY)
                + "ORDER BY f.message_id DESC " + limit(20), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getPhotos(final int visitorUid, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("vid", visitorUid)
                .addValue("before", before);

        return getNamedParameterJdbcTemplate()
                .queryForList("SELECT m.message_id FROM messages m WHERE (m.privacy > 0 OR m.user_id = :vid) "
                        + (before > 0 ? " AND m.message_id < :before " : StringUtils.EMPTY)
                        + " AND m.attach IS NOT NULL " + " AND NOT EXISTS (SELECT 1 FROM bl_tags bt WHERE bt.tag_id IN "
                        + "(SELECT tag_id FROM messages_tags WHERE message_id = m.message_id) and :vid = bt.user_id)"
                        + " AND NOT EXISTS (SELECT 1 from users u WHERE u.banned = 1 and u.id = m.user_id and u.id <> :vid) "
                        + " AND NOT EXISTS (SELECT 1 FROM bl_users b WHERE b.user_id = :vid and b.bl_user_id = m.user_id) "
                        + " ORDER BY m.message_id DESC " + limit(20), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getSearch(final User visitor, final String search, final int page) {
        return searchService.searchInAllMessages(visitor, search, page);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getUserBlog(final int uid, final int privacy, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource().addValue("uid", uid)
                .addValue("privacy", privacy).addValue("before", before);

        return getNamedParameterJdbcTemplate().queryForList(
                "SELECT message_id FROM messages INNER JOIN users" + " ON messages.user_id = users.id"
                        + " WHERE user_id = :uid" + (before > 0 ? " AND message_id < :before" : StringUtils.EMPTY)
                        + " AND privacy >= :privacy AND users.banned = 0 ORDER BY message_id DESC " + limit(20),
                sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getUserTag(final int uid, final int tid, final int privacy, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("uid", uid)
                .addValue("tid", tid)
                .addValue("privacy", privacy)
                .addValue("before", before);
        return getNamedParameterJdbcTemplate()
                .queryForList("SELECT messages.message_id FROM messages_tags INNER JOIN messages"
                        + " ON messages.message_id = messages_tags.message_id" + " INNER JOIN users"
                        + " ON messages.user_id=users.id"
                        + " WHERE messages.user_id = :uid AND messages_tags.tag_id = :tid"
                        + (before > 0 ? " AND messages.message_id < :before " : StringUtils.EMPTY)
                        + " AND messages.privacy >= :privacy AND users.banned = 0"
                        + " ORDER BY messages.message_id DESC " + limit(20), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getUserBlogAtDay(final int uid, final int privacy, final int daysback) {
        var backDate = Instant.now().minus(daysback, ChronoUnit.DAYS).atOffset(ZoneOffset.UTC);
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("uid", uid)
                .addValue("privacy", privacy)
                .addValue("date", toDateTime(backDate), dateTimeType());

        return getNamedParameterJdbcTemplate().queryForList(
                "SELECT message_id FROM messages" + " INNER JOIN users" + " ON messages.user_id = users.id"
                        + " WHERE user_id = :uid"
                        + (daysback > 0
                        ? " AND ts >= :date"
                        + " AND ts < :date"
                        : StringUtils.EMPTY)
                        + " AND privacy >= :privacy AND users.banned = 0 ORDER BY message_id DESC " + limit(20),
                sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getUserBlogWithRecommendations(final User user, final User visitor, final int privacy,
                                                        final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("uid", user.getUid())
                .addValue("vid", visitor.getUid())
                .addValue("privacy", privacy).addValue("before", before);

        return getNamedParameterJdbcTemplate()
                .queryForList("SELECT message_id FROM " + "(SELECT favorites.message_id FROM favorites "
                        + " INNER JOIN messages ON messages.message_id = favorites.message_id"
                        + " INNER JOIN users ON messages.user_id = users.id"
                        + " WHERE favorites.user_id = :uid AND users.banned = 0"
                        + " AND NOT EXISTS (SELECT 1 FROM bl_users b WHERE b.user_id = :vid and b.bl_user_id = messages.user_id) "
                        + " AND NOT EXISTS (SELECT 1 FROM bl_tags bt WHERE bt.tag_id IN "
                        + "(SELECT tag_id FROM messages_tags WHERE message_id = favorites.message_id) and :vid = bt.user_id)"
                        + (before > 0 ? " AND messages.message_id < :before " : StringUtils.EMPTY)
                        + " ORDER BY messages.message_id DESC " + limit(20) + ") as r" + " UNION ALL "
                        + "SELECT message_id FROM "
                        + "(SELECT message_id FROM messages" + " INNER JOIN users" + " ON messages.user_id = users.id"
                        + " WHERE user_id = :uid AND users.banned = 0"
                        + " AND NOT EXISTS (SELECT 1 FROM bl_users b WHERE b.user_id = :vid and b.bl_user_id = messages.user_id) "
                        + " AND NOT EXISTS (SELECT 1 FROM bl_tags bt WHERE bt.tag_id IN "
                        + "(SELECT tag_id FROM messages_tags WHERE message_id = messages.message_id) and :vid = bt.user_id)"
                        + (before > 0 ? " AND messages.message_id < :before" : StringUtils.EMPTY)
                        + " AND privacy >= :privacy ORDER BY messages.message_id DESC " + limit(20) + ") as m "
                        + "ORDER BY message_id DESC " + limit(20), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getUserRecommendations(final int uid, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("uid", uid)
                .addValue("before", before);
        return getNamedParameterJdbcTemplate().queryForList("SELECT message_id FROM favorites" + " INNER JOIN users"
                + " ON favorites.user_id = users.id" + " WHERE user_id = :uid AND users.banned = 0 "
                + (before > 0 ? " AND message_id < :before " : StringUtils.EMPTY)
                + " ORDER BY message_id DESC " + limit(20), sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getUserPhotos(final int uid, final int privacy, final int before) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("uid", uid)
                .addValue("privacy", privacy)
                .addValue("before", before);
        return getNamedParameterJdbcTemplate().queryForList(
                "SELECT message_id FROM messages" + " INNER JOIN users" + " ON messages.user_id = users.id"
                        + " WHERE user_id = :uid and users.banned = 0"
                        + (before > 0 ? " AND message_id < :before " : StringUtils.EMPTY)
                        + " AND privacy >= :privacy AND attach IS NOT NULL ORDER BY message_id DESC "
                        + limit(20),
                sqlParameterSource, Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getUserSearch(final User visitor, final int UID, final String search, final int privacy,
                                       final int page) {
        return searchService.searchByStringAndUser(visitor, search, UID, page);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Message> getMessages(int uid, final List<Integer> mids) {
        if (CollectionUtils.isNotEmpty(mids)) {
            var query = withRecursive() + """
                     banned(message_id, reply_id)
                    AS (SELECT message_id, reply_id FROM replies WHERE replies.message_id IN (:ids)
                    AND (EXISTS (SELECT 1 FROM bl_users b WHERE b.user_id = :uid AND b.bl_user_id = replies.user_id)
                    OR EXISTS (SELECT 1 from users u WHERE u.banned = 1 and u.id = replies.user_id and u.id <> :uid))
                    UNION ALL SELECT replies.message_id, replies.reply_id FROM replies INNER JOIN banned
                    ON banned.reply_id = replies.replyto AND replies.reply_id != replies.replyto AND banned.message_id=replies.message_id
                    WHERE replies.message_id IN (:ids)) SELECT messages.message_id, 0 as rid, 0 as replyto, messages.user_id,
                    users.nick, users.banned as usr_banned, messages.ts, messages.readonly, messages.privacy,
                    1.*messages.replies-COUNT(DISTINCT banned.reply_id) as replies, messages.attach,
                    COUNT(DISTINCT favorites.user_id) AS likes, messages.hidden, '' as tags, messages.repliesby,
                    COALESCE(messages.txt, '') txt, '' as q, messages.updated, 0 as to_uid, NULL as to_name,
                    messages.updated_at, '' as m_user_uri, '' as to_uri, '' as msg_reply_uri, 0 as html,
                    (1.*messages.replies - subscr_messages.last_read_rid) as unread,
                    (SELECT CASE WHEN EXISTS(SELECT * from subscr_messages where message_id=messages.message_id and suser_id=:uid) THEN 1 ELSE 0 END) subscribed,
                    users.premium
                    FROM messages INNER JOIN users ON messages.user_id=users.id LEFT JOIN subscr_messages
                    ON messages.message_id=subscr_messages.message_id AND subscr_messages.suser_id=:uid
                    LEFT JOIN favorites ON messages.message_id = favorites.message_id AND favorites.like_id=1
                    LEFT JOIN banned ON messages.message_id = banned.message_id
                    LEFT JOIN messages_tags ON messages_tags.message_id=messages.message_id
                    LEFT JOIN tags ON tags.tag_id=messages_tags.tag_id
                    WHERE messages.message_id IN (:ids) GROUP BY
                    messages.message_id, messages.user_id, users.nick, users.banned, messages.ts,
                    messages.readonly, messages.privacy, messages.attach, messages.hidden,
                    messages.repliesby, messages.txt, messages.updated, messages.replies, updated_at,
                    subscr_messages.last_read_rid, users.premium""";
            List<Message> msgs = getNamedParameterJdbcTemplate().query(query,
                    new MapSqlParameterSource("ids", mids)
                            .addValue("uid", uid), messageMapper);


            msgs.forEach(m -> {
                var tags = tagService.getMessageTags(m.getMid()).stream()
                        .map(TagStats::getTag).collect(Collectors.toSet());
                m.setTags(tags);
            });
            Map<Integer, Set<Reaction>> likes = updateReactionsFor(mids);
            msgs.forEach(i -> i.setReactions(likes.get(i.getMid())));
            msgs.sort(Comparator.comparing(item -> mids.indexOf(item.getMid())));
            msgs.forEach(i -> i.setEntities(MessageUtils.getEntities(i)));
            List<Pair<Integer, User>> allRecommendations = getMessagesRecommendations(uid, mids);
            msgs.forEach(m -> {
                m.setRecommendations(new HashSet<>(allRecommendations.stream()
                        .filter(r -> r.getLeft().equals(m.getMid())).map(Pair::getRight).toList()));
                m.getRecommendations().forEach(r -> r.setAvatar(webApp.getAvatarUrl(r)));
            });
            return msgs;
        }
        return Collections.emptyList();
    }

    private Map<Integer, Set<Reaction>> updateReactionsFor(final List<Integer> mids) {
        // This method always called from the transactional block, so it should not be
        // marked as transactional itself
        return getNamedParameterJdbcTemplate().query("""
                        select f.message_id as mid, f.like_id as lid,
                        r.description as descr, count(f.like_id) as cnt
                        from favorites f LEFT JOIN reactions r ON f.like_id = r.like_id
                        where f.message_id IN (:mids) group by f.message_id, f.like_id, r.description""",
                new MapSqlParameterSource("mids", mids), (ResultSet rs) -> {
                    Map<Integer, Set<Reaction>> results = new HashMap<>();
                    while (rs.next()) {
                        int messageId = rs.getInt("mid");
                        int likeId = rs.getInt("lid");
                        int count = rs.getInt("cnt");
                        String description = rs.getString("descr");
                        Reaction reaction = new Reaction(likeId);
                        reaction.setCount(count);
                        reaction.setDescription(description);
                        results.computeIfAbsent(messageId, HashSet::new).add(reaction);
                    }
                    return results;
                });

    }

    @Transactional
    @Override
    public List<Message> getReplies(final User user, final int mid) {
        List<Message> replies = getNamedParameterJdbcTemplate().query(withRecursive() + " banned(reply_id, user_id) AS ("
                        + "SELECT reply_id, user_id FROM replies " + "WHERE replies.message_id = :mid "
                        + "AND EXISTS (SELECT 1 FROM bl_users b WHERE b.user_id = :uid AND b.bl_user_id = replies.user_id) "
                        + "UNION ALL SELECT replies.reply_id, replies.user_id FROM replies "
                        + "INNER JOIN banned ON banned.reply_id = replies.replyto " + "WHERE replies.message_id = :mid) "
                        + "SELECT replies.message_id as mid, replies.reply_id, replies.replyto, "
                        + "replies.user_id, users.nick, users.banned, " + "replies.ts, "
                        + "0 as readonly, 0 as privacy, 0 as replies, " + "replies.attach, 0 as likes, 0 as hidden, "
                        + "NULL as tags, NULL as repliesby, replies.txt, " + "COALESCE(qw.txt, m.txt) as q, " + ":now, "
                        + "COALESCE(qw.user_id, m.user_id) as to_uid, COALESCE(qu.nick, mu.nick) as to_name, "
                        + "replies.updated_at, replies.user_uri as uri, "
                        + "qw.user_uri as to_uri, replies.reply_uri, replies.html, 0 as unread, "
                        + "0 as subscribed, users.premium "
                        + "FROM replies LEFT JOIN users " + "ON replies.user_id = users.id "
                        + "LEFT JOIN replies qw ON replies.message_id = qw.message_id and replies.replyto = qw.reply_id "
                        + "LEFT JOIN messages m on replies.message_id = m.message_id "
                        + "LEFT JOIN users qu ON qw.user_id=qu.id " + "LEFT JOIN users mu ON m.user_id=mu.id "
                        + "WHERE replies.message_id = :mid "
                        + "AND NOT EXISTS (SELECT 1 from users u WHERE u.banned = 1 and u.id = replies.user_id and u.id <> :uid)"
                        + "AND NOT EXISTS (SELECT 1 FROM banned WHERE banned.reply_id = replies.reply_id) "
                        + "AND NOT EXISTS (SELECT 1 FROM bl_users b WHERE b.user_id = :uid AND b.bl_user_id = m.user_id) "
                        + "ORDER BY replies.reply_id ASC",
                new MapSqlParameterSource()
                        .addValue("mid", mid)
                        .addValue("uid", user.getUid())
                        .addValue("now", toDateTime(Instant.now().atOffset(ZoneOffset.UTC)), dateTimeType()),
                messageMapper);
        replies.forEach(i -> {
            i.setEntities(MessageUtils.getEntities(i));
            i.getUser().setAvatar(webApp.getAvatarUrl(i.getUser()));
        });
        return replies;
    }

    @Transactional
    @Override
    public boolean setMessagePrivacy(final int mid) {
        return getJdbcTemplate().update("UPDATE messages SET privacy=1 WHERE message_id=?", mid) > 0;
    }

    @Transactional
    @Override
    public boolean deleteMessage(final int uid, final int mid) {
        Instant now = Instant.now();
        Instant messageDeletingWindow = now.minus(3, ChronoUnit.DAYS);
        Optional<Message> message = getMessage(uid, mid);
        if (message.isPresent()) {
            if (message.get().getUser().getUid() != uid) return false;
            Instant ts = message.get().getUpdatedAt();
            SqlParameterSource parameters = new MapSqlParameterSource().addValue("mid", mid).addValue("uid", uid)
                    .addValue("archive_uid", archiveUser.getUid());
            if (ts.compareTo(messageDeletingWindow) >= 0) {
                // TODO: cascade delete
                getNamedParameterJdbcTemplate().update("DELETE FROM replies WHERE message_id = :mid", parameters);
                getNamedParameterJdbcTemplate().update("DELETE FROM messages_tags WHERE message_id = :mid",
                        parameters);
                getNamedParameterJdbcTemplate().update("DELETE FROM subscr_messages WHERE message_id = :mid",
                        parameters);
                getNamedParameterJdbcTemplate().update("DELETE FROM messages_properties WHERE message_id = :mid",
                        parameters);
                return getNamedParameterJdbcTemplate()
                        .update("DELETE FROM messages WHERE message_id = :mid AND user_id = :uid", parameters) > 0;
            } else {
                return getNamedParameterJdbcTemplate().update(
                        "UPDATE messages SET user_id=:archive_uid WHERE message_id = :mid AND user_id = :uid",
                        parameters) > 0;
            }
        }
        return false;
    }

    @Transactional
    @Override
    public boolean deleteReply(final int uid, final int mid, final int rid) {
        Instant now = Instant.now();
        Instant messageDeletingWindow = now.minus(3, ChronoUnit.DAYS);
        var message = getMessage(uid, mid);
        if (message.isPresent()) {
            Message reply = getReply(mid, rid);
            if (reply != null) {
                Instant ts = reply.getUpdatedAt();
                User author = message.get().getUser();
                SqlParameterSource parameters = new MapSqlParameterSource().addValue("mid", mid).addValue("uid", uid)
                        .addValue("rid", rid).addValue("archive_uid", archiveUser.getUid());
                if (ts.compareTo(messageDeletingWindow) >= 0) {
                    boolean result;
                    // allow to delete author replies and replies to author
                    if (author.getUid() == uid) {
                        result = getNamedParameterJdbcTemplate()
                                .update("DELETE FROM replies WHERE message_id=:mid AND reply_id=:rid", parameters) > 0;
                    } else {
                        result = getNamedParameterJdbcTemplate().update(
                                "DELETE FROM replies WHERE message_id=:mid AND reply_id=:rid AND user_id=:uid",
                                parameters) > 0;
                    }
                    if (result) {
                        getNamedParameterJdbcTemplate()
                                .update("UPDATE messages SET replies=replies-1 WHERE message_id=:mid", parameters);
                        updateRepliesBy(mid);
                        return true;
                    }
                } else {
                    // only archive author replies
                    return getNamedParameterJdbcTemplate().update(
                            "UPDATE replies SET user_id=:archive_uid WHERE message_id=:mid AND reply_id=:rid AND user_id=:uid",
                            parameters) > 0;
                }
            }
        }
        return false;
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getLastMessages(int hours) {
        return getNamedParameterJdbcTemplate()
                .queryForList(
                        "SELECT message_id FROM messages WHERE messages.ts > :hours",
                        new MapSqlParameterSource()
                                .addValue("hours",
                                        toDateTime(Instant.now().minus(hours, ChronoUnit.HOURS).atOffset(ZoneOffset.UTC)),
                                        dateTimeType()),
                        Integer.class);

    }

    @Transactional(readOnly = true)
    @Override
    public List<ResponseReply> getLastReplies(int hours) {
        var datetime = Instant.now().minus(hours, ChronoUnit.HOURS).atOffset(ZoneOffset.UTC);
        return getNamedParameterJdbcTemplate().query("""
                        SELECT users2.nick,replies.message_id,replies.reply_id,
                        users.nick,replies.txt,replies.ts,replies.attach,replies.ts, replies.html
                        FROM ((replies INNER JOIN users ON replies.user_id=users.id)
                        INNER JOIN messages ON replies.message_id=messages.message_id)
                        INNER JOIN users AS users2 ON messages.user_id=users2.id
                        WHERE replies.ts>:datetime AND messages.privacy>0
                        """,
                new MapSqlParameterSource()
                        .addValue("datetime", toDateTime(datetime), dateTimeType()),
                (rs, rowNum) -> {
                    ResponseReply reply = new ResponseReply();
                    reply.setMuname(rs.getString(1));
                    reply.setMid(rs.getInt(2));
                    reply.setRid(rs.getInt(3));
                    reply.setUname(rs.getString(4));
                    reply.setDescription(rs.getString(5));
                    reply.setPubDate(rs.getTimestamp(6));
                    reply.setAttachmentType(rs.getString(7));
                    reply.setHtml(rs.getBoolean(8));
                    return reply;
                });
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getPopularCandidates() {
        var beforeTime = Instant.now().minus(2, ChronoUnit.HOURS);
        var sql = """
                SELECT replies.message_id FROM replies
                INNER JOIN messages ON replies.message_id = messages.message_id
                LEFT JOIN favorites ON favorites.message_id = messages.message_id
                LEFT JOIN messages_tags ON messages_tags.message_id = messages.message_id
                LEFT JOIN tags ON messages_tags.tag_id=tags.tag_id
                WHERE replies.ts > :before
                AND NOT EXISTS (SELECT 1 FROM tags WHERE messages_tags.message_id=messages.message_id
                AND messages_tags.tag_id=tags.tag_id AND tags.notop = 1)
                AND NOT EXISTS (SELECT 1 FROM favorites WHERE message_id = messages.message_id
                AND user_id = 2) GROUP BY replies.message_id HAVING COUNT(DISTINCT(replies.user_id)) > 5
                UNION ALL SELECT favorites.message_id FROM favorites
                INNER JOIN messages ON messages.message_id = favorites.message_id
                LEFT JOIN messages_tags ON messages_tags.message_id = messages.message_id
                LEFT JOIN tags ON messages_tags.tag_id=tags.tag_id
                WHERE favorites.ts > :before
                AND NOT EXISTS (SELECT 1 FROM tags WHERE messages_tags.message_id=messages.message_id
                AND messages_tags.tag_id=tags.tag_id AND tags.notop = 1)
                AND NOT EXISTS (SELECT 1 FROM favorites
                WHERE message_id = messages.message_id AND user_id = 2)
                GROUP BY favorites.message_id HAVING COUNT(DISTINCT favorites.user_id) > 2
                    """;
        return getNamedParameterJdbcTemplate().queryForList(sql, new MapSqlParameterSource()
                        .addValue("before", toDateTime(beforeTime.atOffset(ZoneOffset.UTC)),
                                dateTimeType()),
                Integer.class);
    }

    @Transactional
    @Override
    public void setLastReadComment(User user, Integer mid, Integer rid) {
        jdbcTemplate.update(
                "UPDATE subscr_messages SET last_read_rid=" + greatest() + "(?, last_read_rid) WHERE message_id=? AND suser_id=?",
                rid, mid, user.getUid());
    }

    @Transactional
    @Override
    public void setRead(User user, Integer mid) {
        jdbcTemplate.update(
                "UPDATE subscr_messages SET last_read_rid=(select replies from messages "
                        + "where messages.message_id=subscr_messages.message_id) WHERE message_id=? AND suser_id=?",
                mid, user.getUid());
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getUnread(User user) {
        return jdbcTemplate.queryForList(
                "select subscr_messages.message_id "
                        + "from subscr_messages inner join messages on subscr_messages.message_id=messages.message_id "
                        + "where subscr_messages.suser_id=? " + "AND NOT EXISTS (SELECT 1 FROM bl_users WHERE "
                        + "user_id = ? AND bl_user_id = messages.user_id) AND "
                        + "messages.replies>subscr_messages.last_read_rid",
                Integer.class, user.getUid(), user.getUid());
    }

    @Transactional
    @Override
    public boolean updateMessage(Integer mid, Integer rid, String body, boolean foreign) {
        Instant now = Instant.now();
        Instant messageEditingWindow = now.minus(3, ChronoUnit.DAYS);
        Instant replyEditingWindow = now.minus(15, ChronoUnit.MINUTES);
        if (rid == 0) {
            Optional<Message> message = getMessage(mid);
            if (message.isPresent()) {
                Instant ts = message.get().getUpdatedAt();
                if (ts.compareTo(messageEditingWindow) >= 0 || foreign) {
                    return namedParameterJdbcTemplate.update(
                            "UPDATE messages SET txt=:txt, updated_at=:now WHERE message_id=:mid",
                            new MapSqlParameterSource()
                                    .addValue("txt", body)
                                    .addValue("mid", mid)
                                    .addValue("now", toDateTime(now.atOffset(ZoneOffset.UTC)), dateTimeType())) > 0;
                }
            }
            return false;
        } else {
            Message reply = getReply(mid, rid);
            if (reply != null) {
                Instant ts = reply.getUpdatedAt();
                if (ts.compareTo(replyEditingWindow) >= 0 || foreign) {
                    return namedParameterJdbcTemplate.update(
                            "UPDATE replies SET txt=:txt, updated_at=:now WHERE message_id=:mid AND reply_id=:rid",
                            new MapSqlParameterSource()
                                    .addValue("txt", body)
                                    .addValue("mid", mid)
                                    .addValue("rid", rid)
                                    .addValue("now", toDateTime(now.atOffset(ZoneOffset.UTC)), dateTimeType())) > 0;
                }
            }
            return false;
        }
    }

    @Transactional
    @Override
    public boolean updateReplyUri(Message reply, URI replyUri) {
        return jdbcTemplate.update("UPDATE replies SET reply_uri=?, html=0 WHERE message_id=? AND reply_id=?",
                replyUri.toASCIIString(), reply.getMid(), reply.getRid()) > 0;
    }

    @Transactional(readOnly = true)
    @Override
    public boolean replyExists(URI replyUri) {
        return jdbcTemplate
                .queryForList("SELECT reply_id FROM replies WHERE reply_uri=?", Integer.class, replyUri.toASCIIString())
                .size() > 0;
    }

    @Transactional
    @Override
    public boolean deleteReply(URI userUri, URI replyUri) {
        return jdbcTemplate.update("DELETE FROM replies WHERE user_uri=? AND reply_uri=?", userUri.toASCIIString(),
                replyUri.toASCIIString()) > 0;
    }

    @Transactional(readOnly = true)
    @Override
    public String getMessageProperty(Integer mid, Integer rid, String key) {
        List<String> results = jdbcTemplate.queryForList(
                "SELECT property_value FROM messages_properties WHERE message_id=? AND reply_id=? AND property_key=?",
                String.class, mid, rid, key);
        if (results.size() > 0) {
            return results.get(0);
        }
        return StringUtils.EMPTY;
    }

    @Transactional
    @Override
    public void setMessageProperty(Integer mid, Integer rid, String key, String value) {
        SqlParameterSource parameterSource = new MapSqlParameterSource().addValue("mid", mid).addValue("rid", rid)
                .addValue("key", key).addValue("value", value);
        if (StringUtils.isNotEmpty(value)) {
            var exists = getMessageProperty(mid, rid, key);
            if (StringUtils.isEmpty(exists)) {
                getNamedParameterJdbcTemplate()
                        .update("INSERT INTO messages_properties(message_id, reply_id, property_key, property_value) "
                                + "VALUES(:mid, :rid, :key, :value)", parameterSource);
            } else {
                getNamedParameterJdbcTemplate().update("UPDATE messages_properties SET property_value=:value "
                        + "WHERE message_id=:mid AND reply_id=:rid AND property_key=:key", parameterSource);
            }
        } else {
            getNamedParameterJdbcTemplate().update("DELETE FROM messages_properties "
                    + "WHERE message_id=:mid AND reply_id=:rid AND property_key=:key", parameterSource);
        }
    }

    @Transactional(readOnly = true)
    @Override
    public Optional<Pair<Integer, Integer>> findMessageByProperty(String key, String value) {
        List<Pair<Integer, Integer>> results = jdbcTemplate.query(
                "SELECT message_id, reply_id FROM messages_properties " + "WHERE property_key=? AND property_value=?",
                (rs, rowNum) -> Pair.of(rs.getInt(1), rs.getInt(2)), key, value);
        if (results.size() > 0) {
            return Optional.of(results.get(0));
        }
        return Optional.empty();
    }
    @Transactional
    @Override
    public void setFriendsOnly(Integer mid, Boolean friendsOnly) {
        int privacy = friendsOnly ? -1 : 1;
        jdbcTemplate.update("UPDATE messages SET privacy=? WHERE message_id=?", privacy, mid);
    }

    public Optional<String> renderPlaintext(String body, String messageUrl) {
        PebbleTemplate noteTemplate = pebbleEngine.getTemplate("email/plaintext");
        Map<String, Object> context = new HashMap<>();
        context.put("messageBody", body);
        context.put("messageUrl", messageUrl);
        try {
            Writer writer = new StringWriter();
            noteTemplate.evaluate(writer, context);
            return Optional.of(writer.toString());
        } catch (IOException e) {
            return Optional.empty();
        }
    }

    public Optional<String> renderHtml(String body, String messageUrl, Message msg, String hash) {
        PebbleTemplate noteTemplate = pebbleEngine.getTemplate("email/html");
        Map<String, Object> context = new HashMap<>();
        context.put("messageBody", body);
        context.put("messageUrl", messageUrl);
        context.put("msg", msg);
        context.put("hash", hash);
        try {
            Writer writer = new StringWriter();
            noteTemplate.evaluate(writer, context);
            return Optional.of(writer.toString());
        } catch (IOException e) {
            return Optional.empty();
        }
    }
}