/*
 * Copyright 2015-2017 the original author or authors.
 *
 * Licensed 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.springframework.data.rest.core.support;

import static org.mockito.ArgumentMatchers.*;
import static org.mockito.Mockito.*;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Optional;
import java.util.function.Consumer;

import org.assertj.core.api.AbstractOptionalAssert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;
import org.springframework.data.repository.support.RepositoryInvoker;
import org.springframework.data.repository.support.RepositoryInvokerFactory;
import org.springframework.data.rest.core.domain.Profile;

/**
 * Unit tests for {@link UnwrappingRepositoryInvokerFactory}.
 * 
 * @author Oliver Gierke
 */
@RunWith(Parameterized.class)
public class UnwrappingRepositoryInvokerFactoryUnitTests {

	static final Object REFERENCE = new Object();

	RepositoryInvokerFactory delegate = mock(RepositoryInvokerFactory.class);
	RepositoryInvoker invoker = mock(RepositoryInvoker.class);

	RepositoryInvokerFactory factory;
	Method method;

	public @Parameter(0) Object source;
	public @Parameter(1) Consumer<AbstractOptionalAssert<?, Object>> value;

	@Before
	public void setUp() throws Exception {

		when(delegate.getInvokerFor(Object.class)).thenReturn(invoker);

		this.factory = new UnwrappingRepositoryInvokerFactory(delegate, Collections.<EntityLookup<?>> emptyList());
		this.method = Object.class.getMethod("toString");
	}

	@Parameters
	public static Collection<Object[]> data() {

		return Arrays.asList(new Object[][] { //
				{ null, $(it -> it.isEmpty()) }, //
				{ Optional.empty(), $(it -> it.isEmpty()) }, //
				{ Optional.of(REFERENCE), $(it -> it.hasValue(REFERENCE)) }, //
				{ com.google.common.base.Optional.absent(), $(it -> it.isEmpty()) }, //
				{ com.google.common.base.Optional.of(REFERENCE), $(it -> it.hasValue(REFERENCE)) } //
		});
	}

	@Test // DATAREST-724
	@SuppressWarnings("unchecked")
	public void usesRegisteredEntityLookup() {

		EntityLookup<Object> lookup = mock(EntityLookup.class);

		when(lookup.supports(Profile.class)).thenReturn(true);
		when(delegate.getInvokerFor(Profile.class)).thenReturn(invoker);

		factory = new UnwrappingRepositoryInvokerFactory(delegate, Arrays.asList(lookup));
		factory.getInvokerFor(Profile.class).invokeFindById(1L);

		verify(lookup, times(1)).lookupEntity(eq(1L));
	}

	private static Consumer<AbstractOptionalAssert<?, Object>> $(Consumer<AbstractOptionalAssert<?, Object>> consumer) {
		return consumer;
	}
}