/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF 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.
 */
package org.apache.geode.management.internal.cli.commands;

import static org.apache.geode.cache.Region.SEPARATOR;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

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

import org.junit.Before;
import org.junit.Test;

import org.apache.geode.cache.execute.FunctionInvocationTargetException;
import org.apache.geode.cache.execute.ResultCollector;
import org.apache.geode.internal.cache.execute.AbstractExecution;
import org.apache.geode.internal.util.CollectionUtils;
import org.apache.geode.management.internal.cli.domain.IndexDetails;
import org.apache.geode.management.internal.cli.functions.ListIndexFunction;

/**
 * The ListIndexCommandJUnitTest class is a test suite of test cases testing the contract and
 * functionality of the ListIndexCommand class.
 * <p>
 *
 * @see org.apache.geode.management.internal.cli.commands.ClearDefinedIndexesCommand
 * @see org.apache.geode.management.internal.cli.commands.CreateDefinedIndexesCommand
 * @see org.apache.geode.management.internal.cli.commands.CreateIndexCommand
 * @see org.apache.geode.management.internal.cli.commands.DefineIndexCommand
 * @see org.apache.geode.management.internal.cli.commands.DestroyIndexCommand
 * @see org.apache.geode.management.internal.cli.commands.ListIndexCommand
 * @see org.apache.geode.management.internal.cli.domain.IndexDetails
 * @see ListIndexFunction
 * @see org.junit.Test
 * @since GemFire 7.0
 */
public class ListIndexCommandJUnitTest {
  private ListIndexCommand listIndexCommand;
  private ResultCollector mockResultCollector;
  private AbstractExecution mockFunctionExecutor;

  @Before
  public void setup() {
    listIndexCommand = spy(ListIndexCommand.class);
    mockResultCollector = mock(ResultCollector.class, "ResultCollector");
    mockFunctionExecutor = mock(AbstractExecution.class, "Function Executor");
    when(mockFunctionExecutor.execute(any(ListIndexFunction.class)))
        .thenReturn(mockResultCollector);
    doReturn(Collections.emptySet()).when(listIndexCommand).getAllMembers();
    doReturn(mockFunctionExecutor).when(listIndexCommand).getMembersFunctionExecutor(any());
  }

  private IndexDetails createIndexDetails(final String memberId, final String indexName) {
    return new IndexDetails(memberId, SEPARATOR + "Employees", indexName);
  }

  @Test
  public void getIndexListingShouldPropagateExceptionsThrownByTheInternalFunctionExecution() {
    doThrow(new RuntimeException("Mock RuntimeException")).when(mockFunctionExecutor)
        .execute(any(ListIndexFunction.class));
    assertThatThrownBy(() -> listIndexCommand.getIndexListing())
        .isInstanceOf(RuntimeException.class).hasMessageContaining("Mock RuntimeException");
  }

  @Test
  public void getIndexListingShouldReturnTheIndexesOrdered() {
    final IndexDetails indexDetails1 = createIndexDetails("memberOne", "empIdIdx");
    final IndexDetails indexDetails2 = createIndexDetails("memberOne", "empLastNameIdx");
    final IndexDetails indexDetails3 = createIndexDetails("memberTwo", "empDobIdx");
    final List<Set<IndexDetails>> results = new ArrayList<>();
    results.add(CollectionUtils.asSet(indexDetails2, indexDetails1, indexDetails3));
    when(mockResultCollector.getResult()).thenReturn(results);
    final List<IndexDetails> expectedIndexDetails =
        Arrays.asList(indexDetails1, indexDetails2, indexDetails3);

    final List<IndexDetails> actualIndexDetails = listIndexCommand.getIndexListing();
    assertThat(actualIndexDetails).isNotNull();
    assertThat(actualIndexDetails).isEqualTo(expectedIndexDetails);
    verify(mockFunctionExecutor, times(1)).setIgnoreDepartedMembers(true);
    verify(mockFunctionExecutor, times(1)).execute(any(ListIndexFunction.class));
  }

  @Test
  public void getIndexListingShouldIgnoreExceptionsReturnedAsResultsFromTheInternalFunctionExecution() {
    final IndexDetails indexDetails = createIndexDetails("memberOne", "empIdIdx");
    final List<Object> results = new ArrayList<>(2);
    results.add(CollectionUtils.asSet(indexDetails));
    results.add(new FunctionInvocationTargetException("Mock FunctionInvocationTargetException"));
    when(mockResultCollector.getResult()).thenReturn(results);
    final List<IndexDetails> expectedIndexDetails = Collections.singletonList(indexDetails);

    final List<IndexDetails> actualIndexDetails = listIndexCommand.getIndexListing();
    assertThat(actualIndexDetails).isNotNull();
    assertThat(actualIndexDetails).isEqualTo(expectedIndexDetails);
    verify(mockFunctionExecutor, times(1)).setIgnoreDepartedMembers(true);
    verify(mockFunctionExecutor, times(1)).execute(any(ListIndexFunction.class));
  }
}
