/*
    * Copyright 2013-2020 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.contract.maven.verifier;
  
  import java.util.List;
  
  import org.apache.maven.model.Dependency;
  import org.apache.maven.model.Plugin;
  import org.apache.maven.project.MavenProject;
  import org.codehaus.plexus.archiver.jar.Manifest;
  import org.codehaus.plexus.archiver.jar.ManifestException;
  
  final class ManifestCreator {
  
  	private ManifestCreator() {
  		throw new IllegalStateException("Can't instantiate a utility class");
  	}
  
  	public static Manifest createManifest(MavenProject project) throws ManifestException {
  		Manifest manifest = new Manifest();
  		Plugin verifierMavenPlugin = findMavenPlugin(project.getBuildPlugins());
  		if (verifierMavenPlugin != null) {
  			manifest.addConfiguredAttribute(new Manifest.Attribute("Spring-Cloud-Contract-Maven-Plugin-Version",
  					verifierMavenPlugin.getVersion()));
  		}
  		if (verifierMavenPlugin != null && !verifierMavenPlugin.getDependencies().isEmpty()) {
  			Dependency verifierDependency = findVerifierDependency(verifierMavenPlugin.getDependencies());
  			if (verifierDependency != null) {
  				String verifierVersion = verifierDependency.getVersion();
  				manifest.addConfiguredAttribute(
  						new Manifest.Attribute("Spring-Cloud-Contract-Verifier-Version", verifierVersion));
  			}
  		}
  		return manifest;
  	}
  
  	private static Plugin findMavenPlugin(List<Plugin> plugins) {
  		for (Plugin plugin : plugins) {
  			if ("spring-cloud-contract-maven-plugin".equals(plugin.getArtifactId())) {
  				return plugin;
  			}
  		}
  		return null;
  	}
  
  	private static Dependency findVerifierDependency(List<Dependency> deps) {
  		for (Dependency dep : deps) {
  			if ("spring-cloud-contract-verifier".equals(dep.getArtifactId())) {
  				return dep;
  			}
  		}
  		return null;
  	}
  
  }