/*
 * 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.xcontent;

import org.opensearch.core.xcontent.ObjectPath;
import org.opensearch.test.OpenSearchTestCase;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static java.util.Collections.singletonMap;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.hamcrest.Matchers.is;

public class ObjectPathTests extends OpenSearchTestCase {
    public void testEval() {
        Map<String, Object> map = singletonMap("key", "value");

        assertThat(ObjectPath.eval("key", map), is((Object) "value"));
        assertThat(ObjectPath.eval("key1", map), nullValue());
    }

    public void testEvalList() {
        List<Integer> list = Arrays.asList(1, 2, 3, 4);
        Map<String, Object> map = singletonMap("key", list);

        int index = randomInt(3);
        assertThat(ObjectPath.eval("key." + index, map), is(list.get(index)));
    }

    public void testEvalArray() {
        int[] array = new int[] { 1, 2, 3, 4 };
        Map<String, Object> map = singletonMap("key", array);

        int index = randomInt(3);
        assertThat(((Number) ObjectPath.eval("key." + index, map)).intValue(), is(array[index]));
    }

    public void testEvalMap() {
        Map<String, Object> map = singletonMap("a", singletonMap("b", "val"));

        assertThat(ObjectPath.eval("a.b", map), is((Object) "val"));
    }

    public void testEvalMixed() {
        Map<String, Object> map = new HashMap<>();

        Map<String, Object> mapA = new HashMap<>();
        map.put("a", mapA);

        List<Object> listB = new ArrayList<>();
        mapA.put("b", listB);
        List<Object> listB1 = new ArrayList<>();
        listB.add(listB1);

        Map<String, Object> mapB11 = new HashMap<>();
        listB1.add(mapB11);
        mapB11.put("c", "val");

        assertThat(ObjectPath.eval("", map), is((Object) map));
        assertThat(ObjectPath.eval("a.b.0.0.c", map), is((Object) "val"));
        assertThat(ObjectPath.eval("a.b.0.0.c.d", map), nullValue());
        assertThat(ObjectPath.eval("a.b.0.0.d", map), nullValue());
        assertThat(ObjectPath.eval("a.b.c", map), nullValue());
    }
}