/*
 * Copyright 2021-2022 the original author or authors.
 *
 * 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
 *
 *      https://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 org.springframework.data.elasticsearch.client.elc;

import co.elastic.clients.elasticsearch._types.aggregations.Aggregate;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.springframework.data.elasticsearch.core.AggregationsContainer;
import org.springframework.util.Assert;

/**
 * AggregationsContainer implementation for the Elasticsearch aggregations.
 *
 * @author Peter-Josef Meisch
 * @since 4.4
 */
public class ElasticsearchAggregations implements AggregationsContainer<List<ElasticsearchAggregation>> {

	private final List<ElasticsearchAggregation> aggregations;

	public ElasticsearchAggregations(List<ElasticsearchAggregation> aggregations) {

		Assert.notNull(aggregations, "aggregations must not be null");

		this.aggregations = aggregations;
	}

	/**
	 * convenience constructor taking a map as it is returned from the new Elasticsearch client.
	 *
	 * @param aggregationsMap aggregate map
	 */
	public ElasticsearchAggregations(Map<String, Aggregate> aggregationsMap) {

		Assert.notNull(aggregationsMap, "aggregationsMap must not be null");

		aggregations = new ArrayList<>(aggregationsMap.size());
		aggregationsMap
				.forEach((name, aggregate) -> aggregations.add(new ElasticsearchAggregation(new Aggregation(name, aggregate))));
	}

	@Override
	public List<ElasticsearchAggregation> aggregations() {
		return aggregations;
	}
}
