/*
 * 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.bucket.range;

import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.InternalAggregations;
import org.elasticsearch.search.aggregations.InternalMultiBucketAggregation;
import org.elasticsearch.test.InternalMultiBucketAggregationTestCase;

import java.util.List;
import java.util.Map;
import java.util.TreeMap;

public abstract class InternalRangeTestCase<T extends InternalAggregation & Range> extends InternalMultiBucketAggregationTestCase<T> {

    private boolean keyed;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        keyed = randomBoolean();
    }

    @Override
    protected T createTestInstance(String name, Map<String, Object> metadata, InternalAggregations aggregations) {
        return createTestInstance(name, metadata, aggregations, keyed);
    }

    protected abstract T createTestInstance(String name, Map<String, Object> metadata, InternalAggregations aggregations, boolean keyed);

    @Override
    protected boolean supportsSampling() {
        return true;
    }

    @Override
    protected void assertReduced(T reduced, List<T> inputs) {
        final Map<String, Long> expectedCounts = new TreeMap<>();
        for (T input : inputs) {
            for (Range.Bucket bucket : input.getBuckets()) {
                expectedCounts.compute(
                    bucket.getKeyAsString(),
                    (key, oldValue) -> (oldValue == null ? 0 : oldValue) + bucket.getDocCount()
                );

            }
        }
        final Map<String, Long> actualCounts = new TreeMap<>();
        for (Range.Bucket bucket : reduced.getBuckets()) {
            actualCounts.compute(bucket.getKeyAsString(), (key, oldValue) -> (oldValue == null ? 0 : oldValue) + bucket.getDocCount());
        }
        assertEquals(expectedCounts, actualCounts);
    }

    protected abstract Class<? extends InternalMultiBucketAggregation.InternalBucket> internalRangeBucketClass();
}