/*
 * Copyright 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 com.greglturnquist.learningspringboot;

import static org.assertj.core.api.Assertions.*;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.BDDMockito.*;
import static org.mockito.Mockito.mock;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.time.Duration;
import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.data.mongo.DataMongoTest;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.repository.config.EnableReactiveMongoRepositories;
import org.springframework.http.codec.multipart.FilePart;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.FileSystemUtils;

/**
 * @author Greg Turnquist
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = ImageServiceTests.TestConfig.class)
@DataMongoTest
public class ImageServiceTests {

	@Autowired
	ImageRepository repository;

	@Autowired
	ImageService imageService;

	@Autowired
	MongoOperations operations;

	@Before
	public void setUp() throws IOException {
		operations.dropCollection(Image.class);

		operations.insert(new Image("1",
			"learning-spring-boot-cover.jpg"));
		operations.insert(new Image("2",
			"learning-spring-boot-2nd-edition-cover.jpg"));
		operations.insert(new Image("3",
			"bazinga.png"));

		FileSystemUtils.deleteRecursively(new File(ImageService.UPLOAD_ROOT));

		Files.createDirectory(Paths.get(ImageService.UPLOAD_ROOT));

		FileCopyUtils.copy("Test file",
			new FileWriter(ImageService.UPLOAD_ROOT +
				"/learning-spring-boot-cover.jpg"));

		FileCopyUtils.copy("Test file2",
			new FileWriter(ImageService.UPLOAD_ROOT +
				"/learning-spring-boot-2nd-edition-cover.jpg"));

		FileCopyUtils.copy("Test file3",
			new FileWriter(ImageService.UPLOAD_ROOT + "/bazinga.png"));
	}

	@Test
	public void findAllImages() {
		List<Image> images = imageService
			.findAllImages()
			.collectList()
			.block(Duration.ofSeconds(30));
		assertThat(images)
			.hasSize(3)
			.extracting("name").contains(
				"learning-spring-boot-cover.jpg",
				"bazinga.png",
				"learning-spring-boot-2nd-edition-cover.jpg");
	}

	@Test
	public void findOneImage() {
		Resource resource = imageService.findOneImage("learning-spring-boot-cover.jpg").block(Duration.ofSeconds(30));
		assertThat(resource.exists()).isTrue();
	}

	@Test
	public void deleteImage() {
		imageService.deleteImage("learning-spring-boot-cover.jpg").block(Duration.ofSeconds(30));
	}

	@Test
	public void createImages() {
		Image alphaImage = new Image("1", "alpha.jpg");
		Image bravoImage = new Image("2", "bravo.jpg");
		FilePart file1 = mock(FilePart.class);
		given(file1.filename()).willReturn(alphaImage.getName());
		given(file1.transferTo(any())).willReturn(Mono.empty());
		FilePart file2 = mock(FilePart.class);
		given(file2.filename()).willReturn(bravoImage.getName());
		given(file2.transferTo(any())).willReturn(Mono.empty());

		List<Image> images = imageService
			.createImage(Flux.just(file1, file2))
			.then(imageService.findAllImages().collectList())
			.block(Duration.ofSeconds(30));

		assertThat(images).hasSize(5);
	}

	@Configuration
	@EnableReactiveMongoRepositories(basePackageClasses = ImageRepository.class)
	static class TestConfig {

		@Bean
		public ImageService imageService(ResourceLoader resourceLoader, ImageRepository imageRepository) {
			return new ImageService(resourceLoader, imageRepository);
		}
	}

}