/*
 * Copyright 2013-2019 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
 *
 *      https://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.cloud.config.server.environment;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.Charset;

import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.tmatesoft.svn.core.SVNException;
import org.tmatesoft.svn.core.SVNURL;
import org.tmatesoft.svn.core.wc2.SvnCheckout;
import org.tmatesoft.svn.core.wc2.SvnCommit;
import org.tmatesoft.svn.core.wc2.SvnOperationFactory;
import org.tmatesoft.svn.core.wc2.SvnTarget;

import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cloud.config.environment.Environment;
import org.springframework.cloud.config.server.config.ConfigServerProperties;
import org.springframework.cloud.config.server.config.EnvironmentRepositoryConfiguration;
import org.springframework.cloud.config.server.test.ConfigServerTestUtils;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.util.FileSystemUtils;
import org.springframework.util.StreamUtils;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * @author Michael Prankl
 * @author Roy Clarkson
 */
public class SVNKitEnvironmentRepositoryIntegrationTests {

	private ConfigurableApplicationContext context;

	private File workingDir;

	@BeforeEach
	public void init() {
		this.workingDir = new File("target/repos/svn-config-repo-update");
		if (this.workingDir.exists()) {
			FileSystemUtils.deleteRecursively(this.workingDir);
		}
	}

	@AfterEach
	public void close() {
		if (this.context != null) {
			this.context.close();
		}
	}

	@Test
	public void vanilla() throws Exception {
		String uri = ConfigServerTestUtils.prepareLocalSvnRepo("src/test/resources/svn-config-repo", "target/config");
		this.context = new SpringApplicationBuilder(TestConfiguration.class).web(WebApplicationType.NONE)
			.profiles("subversion")
			.run("--spring.cloud.config.server.svn.uri=" + uri);
		EnvironmentRepository repository = this.context.getBean(EnvironmentRepository.class);
		Environment environment = repository.findOne("bar", "staging", "trunk");
		assertThat(environment.getPropertySources()).hasSize(2);
	}

	@Test
	public void update() throws Exception {
		String uri = ConfigServerTestUtils.prepareLocalSvnRepo("src/test/resources/svn-config-repo", "target/config");
		this.context = new SpringApplicationBuilder(TestConfiguration.class).web(WebApplicationType.NONE)
			.profiles("subversion")
			.run("--spring.cloud.config.server.svn.uri=" + uri);
		EnvironmentRepository repository = this.context.getBean(EnvironmentRepository.class);
		Environment environment = repository.findOne("bar", "staging", "trunk");
		assertThat(environment.getPropertySources().get(0).getSource().get("foo")).isEqualTo("bar");
		updateRepoForUpdate(uri);
		environment = repository.findOne("bar", "staging", "trunk");
		assertThat(environment.getPropertySources().get(0).getSource().get("foo")).isEqualTo("foo");
	}

	private void updateRepoForUpdate(String uri) throws SVNException, FileNotFoundException, IOException {
		SvnOperationFactory svnFactory = new SvnOperationFactory();
		final SvnCheckout checkout = svnFactory.createCheckout();
		checkout.setSource(SvnTarget.fromURL(SVNURL.parseURIEncoded(uri)));
		checkout.setSingleTarget(SvnTarget.fromFile(this.workingDir));
		checkout.run();

		// update bar.properties
		File barProps = new File(this.workingDir, "trunk/bar.properties");
		StreamUtils.copy("foo: foo", Charset.defaultCharset(), new FileOutputStream(barProps));
		// commit to repo
		SvnCommit svnCommit = svnFactory.createCommit();
		svnCommit.setCommitMessage("update bar.properties");
		svnCommit.setSingleTarget(SvnTarget.fromFile(barProps));
		svnCommit.run();
	}

	@Test
	public void defaultLabel() throws Exception {
		String uri = ConfigServerTestUtils.prepareLocalSvnRepo("src/test/resources/svn-config-repo", "target/config");
		this.context = new SpringApplicationBuilder(TestConfiguration.class).web(WebApplicationType.NONE)
			.profiles("subversion")
			.run("--spring.cloud.config.server.svn.uri=" + uri);
		SvnKitEnvironmentRepository repository = this.context.getBean(SvnKitEnvironmentRepository.class);
		assertThat(repository.getDefaultLabel()).isEqualTo("trunk");
	}

	@Test
	public void invalidLabel() {
		Assertions.assertThatThrownBy(() -> {
			String uri = ConfigServerTestUtils.prepareLocalSvnRepo("src/test/resources/svn-config-repo",
					"target/config");
			this.context = new SpringApplicationBuilder(TestConfiguration.class).web(WebApplicationType.NONE)
				.profiles("subversion")
				.run("--spring.cloud.config.server.svn.uri=" + uri);
			EnvironmentRepository repository = this.context.getBean(EnvironmentRepository.class);
			Environment environment = repository.findOne("bar", "staging", "unknownlabel");
			assertThat(environment.getPropertySources()).isEmpty();
		}).isInstanceOf(NoSuchLabelException.class);
	}

	@Test
	public void branchLabel() throws Exception {
		String uri = ConfigServerTestUtils.prepareLocalSvnRepo("src/test/resources/svn-config-repo", "target/config");
		this.context = new SpringApplicationBuilder(TestConfiguration.class).web(WebApplicationType.NONE)
			.profiles("subversion")
			.run("--spring.cloud.config.server.svn.uri=" + uri);
		EnvironmentRepository repository = this.context.getBean(EnvironmentRepository.class);
		Environment environment = repository.findOne("bar", "staging", "demobranch");
		assertThat(environment.getPropertySources().get(0).getName()).contains("bar.properties");
		assertThat(environment.getPropertySources()).hasSize(1);
	}

	@Configuration(proxyBeanMethods = false)
	@EnableConfigurationProperties(ConfigServerProperties.class)
	@Import({ PropertyPlaceholderAutoConfiguration.class, EnvironmentRepositoryConfiguration.class })
	protected static class TestConfiguration {

	}

}
