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package com.juick.service;

import com.juick.User;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import javax.inject.Inject;
import java.util.List;

/**
 * Created by aalexeev on 11/13/16.
 */
@Repository
public class PMQueriesServiceImpl extends BaseJdbcService implements PMQueriesService {

    @Inject
    public PMQueriesServiceImpl(JdbcTemplate jdbcTemplate) {
        super(jdbcTemplate, null);
    }

    @Transactional
    @Override
    public boolean createPM(final int uid_from, final int uid_to, final String body) {
        boolean ret = getJdbcTemplate().update(
                "INSERT INTO pm(user_id,user_id_to,txt) VALUES (?,?,?)",
                uid_from, uid_to, body) > 0;

        if (ret) {
            getJdbcTemplate().update(
                    "INSERT INTO pm_streams(user_id,user_id_to,lastmessage,unread) "
                            + "VALUES (?,?,NOW(),1) "
                            + "ON DUPLICATE KEY UPDATE lastmessage=NOW(),unread=unread+1",
                    uid_from, uid_to);
        }
        return ret;
    }

    @Transactional
    @Override
    public boolean addPMinRoster(final int uid, final String jid) {
        return getJdbcTemplate().update(
                "INSERT INTO pm_inroster(user_id,jid) VALUES (?,?)",
                uid, jid) > 0;
    }

    @Transactional
    @Override
    public boolean removePMinRoster(final int uid, final String jid) {
        return getJdbcTemplate().update(
                "DELETE FROM pm_inroster WHERE user_id=? AND jid=?", uid, jid) > 0;
    }

    @Transactional
    @Override
    public boolean havePMinRoster(final int uid, final String jid) {
        List<Integer> res = getJdbcTemplate().queryForList(
                "SELECT 1 FROM pm_inroster WHERE user_id=? AND jid=?",
                Integer.class,
                uid,
                jid);
        return res.size() > 0;
    }

    @Transactional(readOnly = true)
    @Override
    public String getLastView(final int uid_from, final int uid_to) {
        try {
            return getJdbcTemplate().queryForObject(
                    "SELECT lastview FROM pm_streams WHERE user_id=? AND user_id_to=?",
                    String.class,
                    uid_from,
                    uid_to);
        } catch (EmptyResultDataAccessException e) {
            return null;
        }
    }

    @Transactional(readOnly = true)
    @Override
    public List<User> getPMLastConversationsUsers(final int uid, final int cnt) {
        return getJdbcTemplate().query(
                "SELECT pm_streams.user_id, users.nick, pm_streams.unread FROM pm_streams "
                        + "INNER JOIN users ON users.id = pm_streams.user_id "
                        + "WHERE pm_streams.user_id_to=? "
                        + "ORDER BY pm_streams.unread DESC, pm_streams.lastmessage DESC LIMIT " + cnt,
                (rs, rowNum) -> {
                    com.juick.User u = new com.juick.User();
                    u.setUid(rs.getInt(1));
                    u.setName(rs.getString(2));
                    u.setUnreadCount(rs.getInt(3));
                    return u;
                },
                uid);
    }

    @Transactional
    @Override
    public List<com.juick.Message> getPMMessages(final int uid, final int uid_to) {
        List<com.juick.Message> msgs = getJdbcTemplate().query(
                "SELECT user_id,txt,ts FROM pm "
                        + "WHERE (user_id=? AND user_id_to=?) "
                        + "OR (user_id_to=? AND user_id=?) ORDER BY ts DESC LIMIT 20",
                (rs, rowNum) -> {
                    com.juick.Message msg = new com.juick.Message();
                    int uuid = rs.getInt(1);
                    msg.setUser(new User());
                    msg.getUser().setUid(uuid);
                    msg.setText(rs.getString(2));
                    msg.setDate(rs.getTimestamp(3));
                    return msg;
                },
                uid,
                uid_to,
                uid,
                uid_to);

        getJdbcTemplate().update(
                "UPDATE pm_streams SET lastview=NOW(),unread=0 WHERE user_id_to=? AND user_id=?",
                uid,
                uid_to);

        return msgs;
    }

    @Transactional(readOnly = true)
    @Override
    public List<com.juick.Message> getLastPMInbox(final int uid) {
        return getJdbcTemplate().query(
                "SELECT pm.user_id,users.nick,pm.txt,TIMESTAMPDIFF(MINUTE,pm.ts,NOW()),pm.ts " +
                        "FROM pm INNER JOIN users ON pm.user_id=users.id WHERE pm.user_id_to=? ORDER BY pm.ts DESC LIMIT 20",
                (rs, num) -> {
                    com.juick.Message msg = new com.juick.Message();
                    msg.setUser(new User());
                    msg.getUser().setUid(rs.getInt(1));
                    msg.getUser().setName(rs.getString(2));
                    msg.setText(rs.getString(3));
                    msg.TimeAgo = rs.getInt(4);
                    msg.setDate(rs.getTimestamp(5));
                    return msg;
                },
                uid);
    }

    @Transactional(readOnly = true)
    @Override
    public List<com.juick.Message> getLastPMSent(final int uid) {
        return getJdbcTemplate().query(
                "SELECT pm.user_id_to,users.nick,pm.txt,TIMESTAMPDIFF(MINUTE,pm.ts,NOW())," +
                        "pm.ts FROM pm INNER JOIN users ON pm.user_id_to=users.id " +
                        "WHERE pm.user_id=? ORDER BY pm.ts DESC LIMIT 20",
                (rs, num) -> {
                    com.juick.Message msg = new com.juick.Message();
                    msg.setUser(new User());
                    msg.getUser().setUid(rs.getInt(1));
                    msg.getUser().setName(rs.getString(2));
                    msg.setText(rs.getString(3));
                    msg.TimeAgo = rs.getInt(4);
                    msg.setDate(rs.getTimestamp(5));
                    return msg;
                },
                uid);
    }
}