/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.
 */

/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.search.aggregations.pipeline;

import org.opensearch.core.ParseField;
import org.opensearch.core.xcontent.XContentParser;

import java.io.IOException;
import java.util.Map;

/**
 * Parses extended stats values
 *
 * @opensearch.internal
 */
public class ExtendedStatsBucketParser extends BucketMetricsParser {
    static final ParseField SIGMA = new ParseField("sigma");

    @Override
    protected ExtendedStatsBucketPipelineAggregationBuilder buildFactory(
        String pipelineAggregatorName,
        String bucketsPath,
        Map<String, Object> params
    ) {
        ExtendedStatsBucketPipelineAggregationBuilder factory = new ExtendedStatsBucketPipelineAggregationBuilder(
            pipelineAggregatorName,
            bucketsPath
        );
        Double sigma = (Double) params.get(SIGMA.getPreferredName());
        if (sigma != null) {
            factory.sigma(sigma);
        }

        return factory;
    }

    @Override
    protected boolean token(XContentParser parser, String field, XContentParser.Token token, Map<String, Object> params)
        throws IOException {
        if (SIGMA.match(field, parser.getDeprecationHandler()) && token == XContentParser.Token.VALUE_NUMBER) {
            params.put(SIGMA.getPreferredName(), parser.doubleValue());
            return true;
        }
        return false;
    }
}
