/**
 * Copyright © 2016-2017 The Thingsboard Authors
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.thingsboard.server.dao.alarm;

import com.datastax.driver.core.querybuilder.QueryBuilder;
import com.datastax.driver.core.querybuilder.Select;
import com.google.common.util.concurrent.AsyncFunction;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.thingsboard.server.common.data.alarm.Alarm;
import org.thingsboard.server.common.data.alarm.AlarmQuery;
import org.thingsboard.server.common.data.id.EntityId;
import org.thingsboard.server.common.data.id.TenantId;
import org.thingsboard.server.common.data.relation.EntityRelation;
import org.thingsboard.server.dao.AbstractModelDao;
import org.thingsboard.server.dao.AbstractSearchTimeDao;
import org.thingsboard.server.dao.model.AlarmEntity;
import org.thingsboard.server.dao.model.ModelConstants;
import org.thingsboard.server.dao.relation.RelationDao;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import static com.datastax.driver.core.querybuilder.QueryBuilder.eq;
import static com.datastax.driver.core.querybuilder.QueryBuilder.select;
import static org.thingsboard.server.dao.model.ModelConstants.*;

@Component
@Slf4j
public class AlarmDaoImpl extends AbstractModelDao<AlarmEntity> implements AlarmDao {

    @Autowired
    private RelationDao relationDao;

    @Override
    protected Class<AlarmEntity> getColumnFamilyClass() {
        return AlarmEntity.class;
    }

    @Override
    protected String getColumnFamilyName() {
        return ALARM_COLUMN_FAMILY_NAME;
    }

    @Override
    public AlarmEntity save(Alarm alarm) {
        log.debug("Save asset [{}] ", alarm);
        return save(new AlarmEntity(alarm));
    }

    @Override
    public ListenableFuture<Alarm> findLatestByOriginatorAndType(TenantId tenantId, EntityId originator, String type) {
        Select select = select().from(ALARM_COLUMN_FAMILY_NAME);
        Select.Where query = select.where();
        query.and(eq(ALARM_TENANT_ID_PROPERTY, tenantId.getId()));
        query.and(eq(ALARM_ORIGINATOR_ID_PROPERTY, originator.getId()));
        query.and(eq(ALARM_ORIGINATOR_TYPE_PROPERTY, originator.getEntityType()));
        query.and(eq(ALARM_TYPE_PROPERTY, type));
        query.limit(1);
        query.orderBy(QueryBuilder.asc(ModelConstants.ALARM_TYPE_PROPERTY), QueryBuilder.desc(ModelConstants.ID_PROPERTY));
        return Futures.transform(findOneByStatementAsync(query), toDataFunction());
    }

    @Override
    public ListenableFuture<Alarm> findAlarmByIdAsync(UUID key) {
        log.debug("Get alarm by id {}", key);
        Select.Where query = select().from(ALARM_BY_ID_VIEW_NAME).where(eq(ModelConstants.ID_PROPERTY, key));
        query.limit(1);
        log.trace("Execute query {}", query);
        return Futures.transform(findOneByStatementAsync(query), toDataFunction());
    }

    @Override
    public ListenableFuture<List<Alarm>> findAlarms(AlarmQuery query) {
        log.trace("Try to find alarms by entity [{}], status [{}] and pageLink [{}]", query.getAffectedEntityId(), query.getStatus(), query.getPageLink());
        EntityId affectedEntity = query.getAffectedEntityId();
        String relationType = query.getStatus() == null ? BaseAlarmService.ALARM_RELATION : BaseAlarmService.ALARM_RELATION_PREFIX + query.getStatus().name();
        ListenableFuture<List<EntityRelation>> relations = relationDao.findRelations(affectedEntity, relationType, query.getPageLink());
        return Futures.transform(relations, (AsyncFunction<List<EntityRelation>, List<Alarm>>) input -> {
            List<ListenableFuture<Alarm>> alarmFutures = new ArrayList<>(input.size());
            for (EntityRelation relation : input) {
                alarmFutures.add(findAlarmByIdAsync(relation.getTo().getId()));
            }
            return Futures.successfulAsList(alarmFutures);
        });
    }
}
