package com.juick.service;

import com.juick.Message;
import com.juick.Tag;
import com.juick.User;
import com.juick.server.helpers.PrivacyOpts;
import com.juick.service.search.SearchService;
import com.juick.util.MessageUtils;
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.dao.IncorrectResultSizeDataAccessException;
import org.springframework.jdbc.core.ConnectionCallback;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.SqlParameterSource;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.jdbc.support.KeyHolder;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.Assert;

import javax.inject.Inject;
import java.sql.*;
import java.util.*;

/**
 * Created by aalexeev on 11/13/16.
 */
@Repository
public class MessagesServiceImpl extends BaseJdbcService implements MessagesService {
    private final UserService userService;
    private final SearchService searchService;

    @Inject
    public MessagesServiceImpl(JdbcTemplate jdbcTemplate, UserService userService, SearchService searchService) {
        super(jdbcTemplate, null);

        Assert.notNull(userService);
        this.userService = userService;

        Assert.notNull(searchService);
        this.searchService = searchService;
    }

    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(rs.getString(5));
            user.setBanned(rs.getBoolean(6));
            msg.setUser(user);
            msg.TimeAgo = rs.getInt(7);
            msg.setDate(rs.getTimestamp(8));
            msg.ReadOnly = rs.getBoolean(9);
            msg.setPrivacy(rs.getInt(10));
            msg.FriendsOnly = msg.getPrivacy() < 0;
            msg.Replies = rs.getInt(11);
            msg.setAttachmentType(rs.getString(12));
            if (rs.getDouble(13) != 0) {
                msg.Place = new com.juick.Place();
                msg.Place.lat = rs.getDouble(14);
                msg.Place.lon = rs.getDouble(15);
            }
            msg.Likes = rs.getInt(16);
            msg.Hidden = rs.getBoolean(17);
            // parse tags string
            String tagsStr = rs.getString(18);
            if (tagsStr != null) {
                Arrays.stream(tagsStr.split(" ")).forEach(t -> msg.getTags().add(new Tag(t)));
            }
            msg.RepliesBy = rs.getString(19);
            msg.setText(rs.getString(20));
            msg.setReplyQuote(MessageUtils.formatQuote(rs.getString(21)));
            return msg;
        }
    }

    /**
     * @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, final Collection<com.juick.Tag> tags) {
        KeyHolder holder = new GeneratedKeyHolder();
        getJdbcTemplate().update(
                con -> {
                    PreparedStatement stmt = con.prepareStatement(
                            "INSERT INTO messages(user_id, attach) VALUES (?, ?)",
                            Statement.RETURN_GENERATED_KEYS);
                    stmt.setInt(1, uid);
                    if (attachment != null)
                        stmt.setString(2, attachment);
                    else
                        stmt.setNull(2, Types.CHAR);

                    return stmt;
                },
                holder);

        int mid = holder.getKey().intValue();

        if (mid > 0) {
            String tagsNames = "";

            if (CollectionUtils.isNotEmpty(tags)) {
                StringBuilder tasNamesBuilder = new StringBuilder();
                List<Object[]> params = new ArrayList<>(tags.size());

                boolean next = false;

                for (Tag tag : tags) {
                    if (next) {
                        tasNamesBuilder.append(" ");
                    } else
                        next = true;

                    tasNamesBuilder.append(tag.getName());
                    params.add(new Object[]{mid, tag.TID});
                }
                tagsNames = tasNamesBuilder.toString();

                getJdbcTemplate().batchUpdate(
                        "INSERT INTO messages_tags(message_id, tag_id) VALUES (?, ?)",
                        params, new int[]{Types.INTEGER, Types.INTEGER});
            }

            getJdbcTemplate().update(
                    "INSERT INTO messages_txt(message_id, tags, txt) VALUES (?, ?, ?)",
                    new Object[]{mid, tagsNames, txt},
                    new int[]{Types.INTEGER, Types.VARCHAR, Types.VARCHAR});
        }

        return mid;
    }

    /**
     * @param mid
     * @param rid
     * @param uid
     * @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 int uid, final String txt, final String attachment) {
        int ridnew = getReplyIDIncrement(mid);

        getJdbcTemplate().update(
                "INSERT INTO replies(message_id, reply_id, user_id, replyto, attach, txt) VALUES (?, ?, ?, ?, ?, ?)",
                new Object[]{mid, ridnew, uid, rid, attachment, txt},
                new int[]{Types.INTEGER, Types.SMALLINT, Types.INTEGER, Types.SMALLINT, Types.CHAR, Types.VARCHAR});

        if (ridnew > 0)
            getJdbcTemplate().update(
                    "UPDATE messages SET replies = replies + 1 WHERE message_id = ?",
                    mid);
        return ridnew;
    }

    @Override
    public int getReplyIDIncrement(final int mid) {
        return getJdbcTemplate().execute((ConnectionCallback<Integer>) conn -> {
            conn.setAutoCommit(false);
            final int replyNo;
            try (PreparedStatement ps = conn.prepareStatement("START TRANSACTION")) {
                ps.executeUpdate();
            }
            try (PreparedStatement ps = conn.prepareStatement("SELECT maxreplyid+1 FROM messages WHERE message_id=? FOR UPDATE")) {
                ps.setInt(1, mid);
                try (ResultSet resultSet = ps.executeQuery()) {
                    if (resultSet.next()) {
                        replyNo = resultSet.getInt(1);
                    } else {
                        throw new IncorrectResultSizeDataAccessException("while getting getReplyIDIncrement, mid=" + mid, 1, 0);
                    }
                }
            }
            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);
                }
            }
            conn.commit();
            return replyNo;
        });

    }

    @Transactional
    @Override
    public boolean recommendMessage(final int mid, final int vuid) {
        boolean res = getJdbcTemplate().update(
                "INSERT IGNORE INTO favorites(user_id, message_id) VALUES (?, ?)",
                vuid, mid) == 1;

        if (res)
            getJdbcTemplate().update(
                    "UPDATE messages SET likes = likes + 1 WHERE message_id = ?",
                    mid);
        return res;
    }

    @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 = ?",
                new Object[]{mid},
                Integer.class);

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

    @Transactional(readOnly = true)
    @Override
    public boolean isSubscribed(final int uid, final int mid) {
        List<Integer> list = getJdbcTemplate().queryForList(
                "SELECT 1 FROM subscr_messages WHERE suser_id = ? AND message_id = ?",
                new Object[]{uid, mid},
                Integer.class);

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

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

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

    @Transactional(readOnly = true)
    @Override
    public com.juick.Message getMessage(final int mid) {
        List<com.juick.Message> list = getJdbcTemplate().query(
                "SELECT messages.message_id, 0 as rid, 0 as replyto, "
                        + "messages.user_id, users.nick, 0 as banned, "
                        + "TIMESTAMPDIFF(MINUTE, messages.ts, NOW()),"
                        + "messages.ts,"
                        + "messages.readonly, messages.privacy, messages.replies,"
                        + "messages.attach, messages.place_id, messages.lat,"
                        + "messages.lon, messages.likes, messages.hidden,"
                        + "txt.tags, txt.repliesby, txt.txt, '' as q FROM messages "
                        + "INNER JOIN users ON messages.user_id = users.id "
                        + "INNER JOIN messages_txt AS txt "
                        + "ON messages.message_id = txt.message_id "
                        + "WHERE messages.message_id = ?",
                new MessageMapper(),
                mid);

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

    @Transactional(readOnly = true)
    @Override
    public com.juick.Message getReply(final int mid, final int rid) {
        List<com.juick.Message> list = getJdbcTemplate().query(
                "SELECT replies.user_id, users.nick,"
                        + "replies.replyto, replies.ts,"
                        + "replies.attach, replies.txt, IFNULL(q.txt,t.txt) as quote "
                        + "FROM replies INNER 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_txt t ON replies.message_id = t.message_id "
                        + "WHERE replies.message_id = ? AND replies.reply_id = ?",
                (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));
                    msg.setReplyto(rs.getInt(3));
                    msg.setDate(rs.getTimestamp(4));
                    msg.setAttachmentType(rs.getString(5));
                    msg.setText(rs.getString(6));
                    String quote = rs.getString(7);

                    if (!StringUtils.isEmpty(quote)) {
                        msg.setReplyQuote(MessageUtils.formatQuote(quote));
                    }

                    return msg;
                },
                mid, rid);

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

    @Transactional(readOnly = true)
    @Override
    public User getMessageAuthor(final int mid) {
        List<User> list = getJdbcTemplate().query(
                "SELECT messages.user_id, users.nick "
                        + "FROM messages INNER JOIN users ON messages.user_id = users.id WHERE messages.message_id = ?",
                new Object[]{mid},
                (rs, num) -> {
                    User res = new com.juick.User();
                    res.setUid(rs.getInt(1));
                    res.setName(rs.getString(2));
                    return res;
                });

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

    @Transactional(readOnly = true)
    @Override
    public List<String> getMessageRecommendations(final int mid) {
        return getJdbcTemplate().queryForList(
                "SELECT users.nick FROM favorites INNER JOIN users " +
                        "ON (favorites.message_id = ? AND favorites.user_id = users.id)",
                new Object[]{mid},
                String.class);
    }

    @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 " : "") +
                        " m.hidden = 0 AND (m.privacy > 0" +
                        (visitorUid > 1 ?
                                " 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 users u WHERE u.banned = 1 and u.id = m.user_id) 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("cnt", cnt)
                .addValue("before", before)
                .addValue("visitorUid", visitorUid);

        return getNamedParameterJdbcTemplate().queryForList(
                "SELECT 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 USING(message_id) WHERE " +
                        (before > 0 ?
                                " messages.message_id < :before AND " : "") +
                        "(messages.privacy > 0 OR messages.user_id = :visitorUid) ORDER BY 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("cnt", cnt)
                .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 " : "") +
                        " 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 " : "") +
                        " 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) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("uid", uid)
                .addValue("before", before);

        List<Integer> mids = getNamedParameterJdbcTemplate().queryForList(
                "(SELECT message_id FROM messages " +
                        " INNER JOIN subscr_users ON (subscr_users.suser_id = :uid AND subscr_users.user_id = messages.user_id) " +
                        " WHERE " +
                        (before > 0 ?
                                " message_id < :before 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)))) " +
                        " UNION " +
                        " (SELECT message_id FROM messages WHERE user_id=:uid " +
                        (before > 0 ?
                                " AND message_id < :before " : "") +
                        ") ORDER BY message_id DESC LIMIT 20",
                sqlParameterSource,
                Integer.class);

        return mids;
    }

    @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 " : "") +
                                "ORDER BY message_id DESC LIMIT 20",
                        sqlParameterSource,
                        Integer.class);
    }

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

        return getNamedParameterJdbcTemplate().queryForList(
                "SELECT message_id FROM subscr_messages WHERE suser_id = :uid" +
                        (before > 0 ?
                                " AND message_id < :before " : "") +
                        "ORDER BY message_id DESC LIMIT 20",
                sqlParameterSource,
                Integer.class);
    }

    @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 " : "") +
                        "ORDER BY f.message_id DESC LIMIT 20",
                sqlParameterSource,
                Integer.class);
    }

    @Transactional(readOnly = true)
    @Override
    public List<Integer> getPopular(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 " +
                        (before > 0 ?
                                " AND m.message_id < :before " : "") +
                        " AND m.popular > 0 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> 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 " : "") +
                        " AND m.attach IS NOT NULL " +
                        " AND NOT EXISTS (SELECT 1 from users u WHERE u.banned = 1 and u.id = m.user_id) " +
                        " 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 String search, final int before) {
        List<Integer> mids = searchService.searchInAllMessages(search, before);

        if (!mids.isEmpty())
            return getNamedParameterJdbcTemplate().queryForList(
                    "SELECT message_id FROM messages WHERE message_id IN (:ids) AND privacy > 0 ORDER BY message_id DESC LIMIT 20",
                    new MapSqlParameterSource("ids", mids),
                    Integer.class);
        return mids;
    }

    @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 WHERE user_id = :uid" +
                        (before > 0 ?
                                " AND message_id < :before" : "") +
                        " AND privacy >= :privacy 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 " +
                        " USING (message_id) WHERE messages.user_id = :uid AND messages_tags.tag_id = :tid " +
                        (before > 0 ?
                                " AND messages.message_id < :before " : "") +
                        " AND messages.privacy >= :privacy ORDER BY messages.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 " +
                        " WHERE user_id = :uid " +
                        (before > 0 ?
                                " AND message_id < :before " : "") +
                        " 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 WHERE user_id = :uid " +
                        (before > 0 ?
                                " AND message_id < :before " : "") +
                        " 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 JdbcTemplate sqlSearch, final int UID, final String search, final int privacy, final int before) {
        List<Integer> mids = searchService.searchByStringAndUser(search, UID, before);

        if (!mids.isEmpty()) {
            return getNamedParameterJdbcTemplate().queryForList(
                    "SELECT message_id FROM messages WHERE message_id IN (:ids) AND privacy >= :privacy ORDER BY message_id DESC",
                    new MapSqlParameterSource("ids", mids)
                            .addValue("privacy", privacy),
                    Integer.class);
        }
        return mids;
    }

    @Transactional(readOnly = true)
    @Override
    public List<com.juick.Message> getMessages(final Collection<Integer> mids) {
        if (CollectionUtils.isNotEmpty(mids)) {
            return getNamedParameterJdbcTemplate().query(
                    "SELECT messages.message_id, 0 as rid, 0 as replyto, "
                            + "messages.user_id,users.nick, 0 as banned, "
                            + "TIMESTAMPDIFF(MINUTE,messages.ts,NOW()),"
                            + "messages.ts,"
                            + "messages.readonly,messages.privacy,messages.replies,"
                            + "messages.attach,messages.place_id,messages.lat,"
                            + "messages.lon,messages.likes,messages.hidden,"
                            + "messages_txt.tags,messages_txt.repliesby, messages_txt.txt, '' as q "
                            + "FROM (messages INNER JOIN messages_txt "
                            + "ON messages.message_id=messages_txt.message_id) "
                            + "INNER JOIN users ON messages.user_id=users.id "
                            + "WHERE messages.message_id IN (:ids) ORDER BY messages.message_id DESC",
                    new MapSqlParameterSource("ids", mids),
                    new MessageMapper());
        }
        return Collections.emptyList();
    }

    @Transactional(readOnly = true)
    @Override
    public List<com.juick.Message> getReplies(final int mid) {
        return getNamedParameterJdbcTemplate().query(
                "SELECT replies.message_id as mid, replies.reply_id, replies.replyto, " +
                        "replies.user_id, users.nick, users.banned, " +
                        "TIMESTAMPDIFF(MINUTE, replies.ts, NOW()), replies.ts, " +
                        "0 as readonly, 0 as privacy, 0 as replies, " +
                        "replies.attach, 0 as place_id, 0 as lat, " +
                        "0 as lon, 0 as likes, 0 as hidden, " +
                        "NULL as tags, NULL as repliesby, replies.txt, " +
                        "IFNULL(qw.txt, t.txt) as q " +
                        "FROM replies INNER 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_txt t on replies.message_id = t.message_id " +
                        "WHERE replies.message_id = :mid ORDER BY replies.reply_id ASC",
                new MapSqlParameterSource("mid", mid),
                new MessageMapper());
    }

    @Transactional
    @Override
    public boolean setMessagePopular(final int mid, final int popular) {
        int ret;
        MapSqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("mid", mid)
                .addValue("popular", popular);

        switch (popular) {
            case -2:
                ret = getNamedParameterJdbcTemplate().update(
                        "UPDATE messages SET hidden = 1 WHERE message_id = :mid",
                        sqlParameterSource);
                break;
            case -1:
                sqlParameterSource.addValue("popular", 0);
            default:
                ret = getNamedParameterJdbcTemplate().update(
                        "UPDATE messages SET popular = :popular WHERE message_id = :mid",
                        sqlParameterSource);
                break;
        }

        if (popular == -1)
            ret = getNamedParameterJdbcTemplate().update(
                    "INSERT INTO top_ignore_messages VALUES (:mid)",
                    sqlParameterSource);

        return ret > 0;
    }

    @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) {
        SqlParameterSource sqlParameterSource = new MapSqlParameterSource()
                .addValue("mid", mid)
                .addValue("uid", uid);

        if (getNamedParameterJdbcTemplate().update(
                "DELETE FROM messages WHERE message_id = :mid AND user_id = :uid", sqlParameterSource) > 0) {

            getNamedParameterJdbcTemplate().update("DELETE FROM messages_txt WHERE message_id = :mid", sqlParameterSource);
            getNamedParameterJdbcTemplate().update("DELETE FROM replies WHERE message_id = :mid", sqlParameterSource);
            getNamedParameterJdbcTemplate().update("DELETE FROM subscr_messages WHERE message_id = :mid", sqlParameterSource);
            getNamedParameterJdbcTemplate().update("DELETE FROM messages_tags WHERE message_id = :mid", sqlParameterSource);

            return true;
        }
        return false;
    }
}