/*
 * Copyright 2012-present 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.boot.build.test;

import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.plugins.JavaPlugin;
import org.gradle.api.plugins.JavaPluginExtension;
import org.gradle.api.tasks.SourceSet;
import org.gradle.api.tasks.SourceSetContainer;
import org.gradle.api.tasks.TaskProvider;
import org.gradle.api.tasks.testing.Test;
import org.gradle.language.base.plugins.LifecycleBasePlugin;
import org.gradle.plugins.ide.eclipse.EclipsePlugin;
import org.gradle.plugins.ide.eclipse.model.EclipseModel;

/**
 * A {@link Plugin} to configure integration testing support in a {@link Project}.
 *
 * @author Andy Wilkinson
 */
public class IntegrationTestPlugin implements Plugin<Project> {

	/**
	 * Name of the {@code intTest} task.
	 */
	public static String INT_TEST_TASK_NAME = "intTest";

	/**
	 * Name of the {@code intTest} source set.
	 */
	public static String INT_TEST_SOURCE_SET_NAME = "intTest";

	@Override
	public void apply(Project project) {
		project.getPlugins().withType(JavaPlugin.class, (javaPlugin) -> configureIntegrationTesting(project));
	}

	private void configureIntegrationTesting(Project project) {
		SourceSet intTestSourceSet = createSourceSet(project);
		TaskProvider<Test> intTest = createTestTask(project, intTestSourceSet);
		project.getTasks().getByName(LifecycleBasePlugin.CHECK_TASK_NAME).dependsOn(intTest);
		project.getPlugins().withType(EclipsePlugin.class, (eclipsePlugin) -> {
			EclipseModel eclipse = project.getExtensions().getByType(EclipseModel.class);
			eclipse.classpath((classpath) -> classpath.getPlusConfigurations()
				.add(project.getConfigurations().getByName(intTestSourceSet.getRuntimeClasspathConfigurationName())));
		});
		project.getDependencies()
			.add(intTestSourceSet.getRuntimeOnlyConfigurationName(), "org.junit.platform:junit-platform-launcher");
	}

	private SourceSet createSourceSet(Project project) {
		SourceSetContainer sourceSets = project.getExtensions().getByType(JavaPluginExtension.class).getSourceSets();
		SourceSet intTestSourceSet = sourceSets.create(INT_TEST_SOURCE_SET_NAME);
		SourceSet main = sourceSets.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
		intTestSourceSet.setCompileClasspath(intTestSourceSet.getCompileClasspath().plus(main.getOutput()));
		intTestSourceSet.setRuntimeClasspath(intTestSourceSet.getRuntimeClasspath().plus(main.getOutput()));
		return intTestSourceSet;
	}

	private TaskProvider<Test> createTestTask(Project project, SourceSet intTestSourceSet) {
		return project.getTasks().register(INT_TEST_TASK_NAME, Test.class, (task) -> {
			task.setGroup(LifecycleBasePlugin.VERIFICATION_GROUP);
			task.setDescription("Runs integration tests.");
			task.setTestClassesDirs(intTestSourceSet.getOutput().getClassesDirs());
			task.setClasspath(intTestSourceSet.getRuntimeClasspath());
			task.shouldRunAfter(JavaPlugin.TEST_TASK_NAME);
		});
	}

}
