/*
 * 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", the "GNU Affero General Public License v3.0 only", 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", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.search.aggregations.pipeline;

import org.elasticsearch.TransportVersion;
import org.elasticsearch.TransportVersions;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.xcontent.XContentBuilder;

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

public class MinBucketPipelineAggregationBuilder extends BucketMetricsPipelineAggregationBuilder<MinBucketPipelineAggregationBuilder> {
    public static final String NAME = "min_bucket";

    public MinBucketPipelineAggregationBuilder(String name, String bucketsPath) {
        super(name, NAME, new String[] { bucketsPath });
    }

    /**
     * Read from a stream.
     */
    public MinBucketPipelineAggregationBuilder(StreamInput in) throws IOException {
        super(in, NAME);
    }

    @Override
    protected void innerWriteTo(StreamOutput out) throws IOException {
        // Do nothing, no extra state to write to stream
    }

    @Override
    protected PipelineAggregator createInternal(Map<String, Object> metadata) {
        return new MinBucketPipelineAggregator(name, bucketsPaths, gapPolicy(), formatter(), metadata);
    }

    @Override
    protected XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
        return builder;
    }

    public static final PipelineAggregator.Parser PARSER = new BucketMetricsParser() {
        @Override
        protected MinBucketPipelineAggregationBuilder buildFactory(
            String pipelineAggregatorName,
            String bucketsPath,
            Map<String, Object> params
        ) {
            return new MinBucketPipelineAggregationBuilder(pipelineAggregatorName, bucketsPath);
        }
    };

    @Override
    public String getWriteableName() {
        return NAME;
    }

    @Override
    public TransportVersion getMinimalSupportedVersion() {
        return TransportVersions.ZERO;
    }
}