/*
 * 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.
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/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.cluster.node;

import org.opensearch.common.settings.Setting;
import org.opensearch.common.settings.Settings;
import org.opensearch.test.OpenSearchTestCase;

import java.util.Collections;
import java.util.function.Predicate;

import static org.opensearch.test.NodeRoles.onlyRole;
import static org.opensearch.test.NodeRoles.removeRoles;
import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.not;
import static org.hamcrest.Matchers.startsWith;

public class DiscoveryNodeRoleSettingTests extends OpenSearchTestCase {

    public void testIsDataNode() {
        runRoleTest(DiscoveryNode::isDataNode, DiscoveryNodeRole.DATA_ROLE);
    }

    public void testIsIngestNode() {
        runRoleTest(DiscoveryNode::isIngestNode, DiscoveryNodeRole.INGEST_ROLE);
    }

    public void testIsMasterNode() {
        DiscoveryNode.setDeprecatedMasterRole();
        runRoleTest(DiscoveryNode::isClusterManagerNode, DiscoveryNodeRole.MASTER_ROLE);
    }

    public void testIsRemoteClusterClient() {
        runRoleTest(DiscoveryNode::isRemoteClusterClient, DiscoveryNodeRole.REMOTE_CLUSTER_CLIENT_ROLE);
    }

    private void runRoleTest(final Predicate<Settings> predicate, final DiscoveryNodeRole role) {
        final Settings legacyTrue = Settings.builder().put(role.legacySetting().getKey(), true).build();

        assertTrue(predicate.test(legacyTrue));
        assertSettingDeprecationsAndWarnings(new Setting<?>[] { role.legacySetting() });

        assertThat(DiscoveryNode.getRolesFromSettings(legacyTrue), hasItem(role));
        assertNoDeprecationWarnings();

        final Settings legacyFalse = Settings.builder().put(role.legacySetting().getKey(), false).build();

        assertFalse(predicate.test(legacyFalse));
        assertNoDeprecationWarnings();

        assertThat(DiscoveryNode.getRolesFromSettings(legacyFalse), not(hasItem(role)));
        assertNoDeprecationWarnings();

        assertTrue(predicate.test(onlyRole(role)));
        assertNoDeprecationWarnings();

        assertFalse(predicate.test(removeRoles(Collections.singleton(role))));
        assertNoDeprecationWarnings();

        final Settings settings = Settings.builder().put(onlyRole(role)).put(role.legacySetting().getKey(), randomBoolean()).build();
        final IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> DiscoveryNode.getRolesFromSettings(settings));
        assertThat(e.getMessage(), startsWith("can not explicitly configure node roles and use legacy role setting"));
        assertNoDeprecationWarnings();
    }
}