/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.search.aggregations.metrics;

import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.CardinalityUpperBound;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.CoreValuesSourceType;
import org.elasticsearch.search.aggregations.support.ValuesSourceAggregatorFactory;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.ValuesSourceRegistry;

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

class ExtendedStatsAggregatorFactory extends ValuesSourceAggregatorFactory {

    private final ExtendedStatsAggregatorProvider aggregatorSupplier;
    private final double sigma;

    ExtendedStatsAggregatorFactory(String name,
                                    ValuesSourceConfig config,
                                    double sigma,
                                    AggregationContext context,
                                    AggregatorFactory parent,
                                    AggregatorFactories.Builder subFactoriesBuilder,
                                    Map<String, Object> metadata,
                                    ExtendedStatsAggregatorProvider aggregatorSupplier) throws IOException {
        super(name, config, context, parent, subFactoriesBuilder, metadata);
        this.sigma = sigma;
        this.aggregatorSupplier = aggregatorSupplier;
    }

    static void registerAggregators(ValuesSourceRegistry.Builder builder) {
        builder.register(
            ExtendedStatsAggregationBuilder.REGISTRY_KEY,
            Arrays.asList(CoreValuesSourceType.NUMERIC, CoreValuesSourceType.DATE, CoreValuesSourceType.BOOLEAN),
            ExtendedStatsAggregator::new,
                true);
    }

    @Override
    protected Aggregator createUnmapped(Aggregator parent, Map<String, Object> metadata) throws IOException {
        return new ExtendedStatsAggregator(name, config, context, parent, sigma, metadata);
    }

    @Override
    protected Aggregator doCreateInternal(
        Aggregator parent,
        CardinalityUpperBound cardinality,
        Map<String, Object> metadata
    ) throws IOException {
        return aggregatorSupplier.build(name, config, context, parent, sigma, metadata);
    }
}
