/*
 * 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.repositories;

import org.opensearch.cluster.service.ClusterService;
import org.opensearch.common.settings.Settings;
import org.opensearch.core.xcontent.NamedXContentRegistry;
import org.opensearch.env.Environment;
import org.opensearch.indices.recovery.RecoverySettings;
import org.opensearch.plugins.RepositoryPlugin;
import org.opensearch.test.OpenSearchTestCase;
import org.opensearch.threadpool.ThreadPool;
import org.opensearch.transport.TransportService;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class RepositoriesModuleTests extends OpenSearchTestCase {

    private Environment environment;
    private NamedXContentRegistry contentRegistry;
    private List<RepositoryPlugin> repoPlugins = new ArrayList<>();
    private RepositoryPlugin plugin1;
    private RepositoryPlugin plugin2;
    private Repository.Factory factory;
    private ThreadPool threadPool;
    private ClusterService clusterService;
    private RecoverySettings recoverySettings;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        environment = mock(Environment.class);
        contentRegistry = mock(NamedXContentRegistry.class);
        threadPool = mock(ThreadPool.class);
        clusterService = mock(ClusterService.class);
        recoverySettings = mock(RecoverySettings.class);
        plugin1 = mock(RepositoryPlugin.class);
        plugin2 = mock(RepositoryPlugin.class);
        factory = mock(Repository.Factory.class);
        repoPlugins.add(plugin1);
        repoPlugins.add(plugin2);
        when(environment.settings()).thenReturn(Settings.EMPTY);
    }

    public void testCanRegisterTwoRepositoriesWithDifferentTypes() {
        when(plugin1.getRepositories(environment, contentRegistry, clusterService, recoverySettings)).thenReturn(
            Collections.singletonMap("type1", factory)
        );
        when(plugin2.getRepositories(environment, contentRegistry, clusterService, recoverySettings)).thenReturn(
            Collections.singletonMap("type2", factory)
        );

        // Would throw
        new RepositoriesModule(
            environment,
            repoPlugins,
            mock(TransportService.class),
            mock(ClusterService.class),
            threadPool,
            contentRegistry,
            recoverySettings
        );
    }

    public void testCannotRegisterTwoRepositoriesWithSameTypes() {
        when(plugin1.getRepositories(environment, contentRegistry, clusterService, recoverySettings)).thenReturn(
            Collections.singletonMap("type1", factory)
        );
        when(plugin2.getRepositories(environment, contentRegistry, clusterService, recoverySettings)).thenReturn(
            Collections.singletonMap("type1", factory)
        );

        IllegalArgumentException ex = expectThrows(
            IllegalArgumentException.class,
            () -> new RepositoriesModule(
                environment,
                repoPlugins,
                mock(TransportService.class),
                clusterService,
                threadPool,
                contentRegistry,
                recoverySettings
            )
        );

        assertEquals("Repository type [type1] is already registered", ex.getMessage());
    }

    public void testCannotRegisterTwoInternalRepositoriesWithSameTypes() {
        when(plugin1.getInternalRepositories(environment, contentRegistry, clusterService, recoverySettings)).thenReturn(
            Collections.singletonMap("type1", factory)
        );
        when(plugin2.getInternalRepositories(environment, contentRegistry, clusterService, recoverySettings)).thenReturn(
            Collections.singletonMap("type1", factory)
        );

        IllegalArgumentException ex = expectThrows(
            IllegalArgumentException.class,
            () -> new RepositoriesModule(
                environment,
                repoPlugins,
                mock(TransportService.class),
                clusterService,
                threadPool,
                contentRegistry,
                recoverySettings
            )
        );

        assertEquals("Internal repository type [type1] is already registered", ex.getMessage());
    }

    public void testCannotRegisterNormalAndInternalRepositoriesWithSameTypes() {
        when(plugin1.getRepositories(environment, contentRegistry, clusterService, recoverySettings)).thenReturn(
            Collections.singletonMap("type1", factory)
        );
        when(plugin2.getInternalRepositories(environment, contentRegistry, clusterService, recoverySettings)).thenReturn(
            Collections.singletonMap("type1", factory)
        );

        IllegalArgumentException ex = expectThrows(
            IllegalArgumentException.class,
            () -> new RepositoriesModule(
                environment,
                repoPlugins,
                mock(TransportService.class),
                clusterService,
                threadPool,
                contentRegistry,
                recoverySettings
            )
        );

        assertEquals("Internal repository type [type1] is already registered as a non-internal repository", ex.getMessage());
    }
}