/*
 * Copyright 2012-2017 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.boot.gradle.plugin;

import java.util.Arrays;
import java.util.List;

import org.gradle.api.GradleException;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.artifacts.Configuration;
import org.gradle.util.GradleVersion;

import org.springframework.boot.gradle.dsl.SpringBootExtension;
import org.springframework.boot.gradle.tasks.bundling.BootJar;
import org.springframework.boot.gradle.tasks.bundling.BootWar;

/**
 * Gradle plugin for Spring Boot.
 *
 * @author Phillip Webb
 * @author Dave Syer
 * @author Andy Wilkinson
 */
public class SpringBootPlugin implements Plugin<Project> {

	/**
	 * The name of the {@link Configuration} that contains Spring Boot archives.
	 *
	 * @since 2.0.0
	 */
	public static final String BOOT_ARCHIVES_CONFIGURATION_NAME = "bootArchives";

	/**
	 * The name of the default {@link BootJar} task.
	 *
	 * @since 2.0.0
	 */
	public static final String BOOT_JAR_TASK_NAME = "bootJar";

	/**
	 * The name of the default {@link BootWar} task.
	 *
	 * @since 2.0.0
	 */
	public static final String BOOT_WAR_TASK_NAME = "bootWar";

	@Override
	public void apply(Project project) {
		verifyGradleVersion();
		createExtension(project);
		Configuration bootArchives = createBootArchivesConfiguration(project);
		registerPluginActions(project, bootArchives);
		unregisterUnresolvedDependenciesAnalyzer(project);
	}

	private void verifyGradleVersion() {
		if (GradleVersion.current().compareTo(GradleVersion.version("3.4")) < 0) {
			throw new GradleException("Spring Boot plugin requires Gradle 3.4 or later."
					+ " The current version is " + GradleVersion.current());
		}
	}

	private void createExtension(Project project) {
		project.getExtensions().create("springBoot", SpringBootExtension.class, project);
	}

	private Configuration createBootArchivesConfiguration(Project project) {
		Configuration bootArchives = project.getConfigurations()
				.create(BOOT_ARCHIVES_CONFIGURATION_NAME);
		bootArchives.setDescription("Configuration for Spring Boot archive artifacts.");
		return bootArchives;
	}

	private void registerPluginActions(Project project, Configuration bootArchives) {
		SinglePublishedArtifact singlePublishedArtifact = new SinglePublishedArtifact(
				bootArchives.getArtifacts());
		List<PluginApplicationAction> actions = Arrays.asList(
				new JavaPluginAction(singlePublishedArtifact),
				new WarPluginAction(singlePublishedArtifact),
				new MavenPluginAction(bootArchives.getUploadTaskName()),
				new DependencyManagementPluginAction(), new ApplicationPluginAction());
		for (PluginApplicationAction action : actions) {
			project.getPlugins().withType(action.getPluginClass(),
					plugin -> action.execute(project));
		}
	}

	private void unregisterUnresolvedDependenciesAnalyzer(Project project) {
		UnresolvedDependenciesAnalyzer unresolvedDependenciesAnalyzer = new UnresolvedDependenciesAnalyzer();
		project.getConfigurations().all(configuration -> configuration.getIncoming()
				.afterResolve(resolvableDependencies -> unresolvedDependenciesAnalyzer
						.analyze(configuration.getResolvedConfiguration()
								.getLenientConfiguration()
								.getUnresolvedModuleDependencies())));
		project.getGradle().buildFinished(
				buildResult -> unresolvedDependenciesAnalyzer.buildFinished(project));
	}

}
