/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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 com.epam.dlab.backendapi.dao.azure;

import com.epam.dlab.MongoKeyWords;
import com.epam.dlab.backendapi.dao.BaseBillingDAO;
import com.epam.dlab.backendapi.resources.dto.BillingFilter;
import com.epam.dlab.billing.DlabResourceType;
import com.google.inject.Singleton;
import com.mongodb.client.model.Accumulators;
import com.mongodb.client.model.Aggregates;
import com.mongodb.client.model.Filters;
import com.mongodb.client.model.Sorts;
import lombok.extern.slf4j.Slf4j;
import org.bson.Document;
import org.bson.conversions.Bson;

import java.util.Collections;
import java.util.List;

@Singleton
@Slf4j
public class AzureBillingDAO extends BaseBillingDAO {
	public static final String SIZE = "size";

	@Override
	protected List<Bson> cloudMatchCriteria(BillingFilter filter) {
		if (!filter.getService().isEmpty()) {
			return Collections.singletonList(Filters.in(MongoKeyWords.METER_CATEGORY, filter.getService()));
		} else {
			return Collections.emptyList();
		}
	}

	@Override
	protected Bson groupCriteria() {
		return Aggregates.group(getGroupingFields(
				MongoKeyWords.DLAB_USER,
				MongoKeyWords.DLAB_ID,
				MongoKeyWords.RESOURCE_TYPE,
				MongoKeyWords.METER_CATEGORY,
				MongoKeyWords.CURRENCY_CODE,
				FIELD_PROJECT),
				Accumulators.sum(MongoKeyWords.COST, MongoKeyWords.prepend$(MongoKeyWords.COST)),
				Accumulators.min(MongoKeyWords.USAGE_FROM, MongoKeyWords.prepend$(MongoKeyWords.USAGE_DAY)),
				Accumulators.max(MongoKeyWords.USAGE_TO, MongoKeyWords.prepend$(MongoKeyWords.USAGE_DAY))
		);
	}

	@Override
	protected Bson sortCriteria() {
		return Aggregates.sort(Sorts.ascending(
				MongoKeyWords.prependId(MongoKeyWords.DLAB_USER),
				MongoKeyWords.prependId(MongoKeyWords.DLAB_ID),
				MongoKeyWords.prependId(MongoKeyWords.RESOURCE_TYPE),
				MongoKeyWords.prependId(MongoKeyWords.METER_CATEGORY)));
	}

	@Override
	protected String getServiceBaseName() {
		return settings.getServiceBaseName().replace("_", "-").toLowerCase();
	}

	@Override
	protected String shapeFieldName() {
		return SIZE;
	}

	@Override
	protected String dlabIdFieldName() {
		return MongoKeyWords.DLAB_ID;
	}

	@Override
	protected String productFieldName() {
		return MongoKeyWords.METER_CATEGORY;
	}

	@Override
	protected String costFieldName() {
		return MongoKeyWords.COST_STRING;
	}

	@Override
	protected String usageDateFromFieldName() {
		return MongoKeyWords.USAGE_FROM;
	}

	@Override
	protected String usageDateToFieldName() {
		return MongoKeyWords.USAGE_TO;
	}

	@Override
	protected String currencyCodeFieldName() {
		return MongoKeyWords.CURRENCY_CODE;
	}

	@Override
	protected String resourceType(Document id) {
		return DlabResourceType.getResourceTypeName(id.getString(MongoKeyWords.RESOURCE_TYPE));
	}

}