/*
 * 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.common.util;

import java.util.Map;
import java.util.Objects;

/**
 * Map utility class.
 *
 * @opensearch.internal
 */
public class Maps {

    /**
     * Returns {@code true} if the two specified maps are equal to one another. Two maps are considered equal if both represent identical
     * mappings where values are checked with Objects.deepEquals. The primary use case is to check if two maps with array values are equal.
     *
     * @param left  one map to be tested for equality
     * @param right the other map to be tested for equality
     * @return {@code true} if the two maps are equal
     */
    public static <K, V> boolean deepEquals(Map<K, V> left, Map<K, V> right) {
        if (left == right) {
            return true;
        }
        if (left == null || right == null || left.size() != right.size()) {
            return false;
        }
        return left.entrySet()
            .stream()
            .allMatch(e -> right.containsKey(e.getKey()) && Objects.deepEquals(e.getValue(), right.get(e.getKey())));
    }

}