/*
 * Copyright (C) 2008-2017, 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.User;
import com.juick.server.helpers.AnonymousUser;
import com.juick.service.data.UsersRepository;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import javax.inject.Inject;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.UUID;
import java.util.stream.Collectors;

/**
 * Created by vt on 24/11/2016.
 */
@Repository
public class TelegramServiceImpl extends BaseJdbcService implements TelegramService {
    @Inject
    UsersRepository usersRepository;

    @Transactional
    @Override
    public boolean addChat(final Long id) {
        try {
            return getJdbcTemplate().update("INSERT INTO telegram_chats(chat_id) VALUES(?)", id) > 0;
        } catch (DuplicateKeyException e) {
            return true;
        }
    }

    @Transactional
    @Override
    public boolean deleteChat(Long id) {
        return getJdbcTemplate().update("DELETE FROM telegram_chats WHERE chat_id=?", id) > 0;
    }

    @Transactional(readOnly = true)
    @Override
    public List<Long> getChats() {
        return getJdbcTemplate().queryForList("SELECT chat_id FROM telegram_chats", Long.class);
    }

    @Transactional(readOnly = true)
    @Override
    public User getUser(final long tgId) {
        return usersRepository.findByTgIds_Identifier(tgId).map(EntityUtils::entityToUser).orElse(AnonymousUser.INSTANCE);
    }

    @Transactional
    @Override
    public boolean createTelegramUser(final long tgID, final String tgName) {
        return getJdbcTemplate().update(
                "INSERT INTO telegram(tg_id, tg_name, loginhash) VALUES(?,?,?)",
                tgID, tgName, UUID.randomUUID().toString()) > 0;
    }

    @Transactional
    @Override
    public boolean deleteTelegramUser(Integer uid) {
        return getJdbcTemplate().update("DELETE FROM telegram WHERE user_id=?", uid) > 0;
    }

    @Transactional(readOnly = true)
    @Override
    public List<Long> getTelegramIdentifiers(List<User> users) {
        List<Integer> uids = users.stream().map(User::getUid).collect(Collectors.toList());
        if (uids.isEmpty()) {
            return Collections.emptyList();
        }
        return getNamedParameterJdbcTemplate().queryForList("" +
                "SELECT tg_id FROM telegram WHERE user_id IN(:uids)", new MapSqlParameterSource()
                .addValue("uids", uids), Long.class);
    }
}