/**
    * Copyright 2011-2013 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.maven.plugins.externals;
  
  import java.io.File;
  import java.util.List;
  import java.util.Map;
  
  import javax.swing.tree.DefaultMutableTreeNode;
  
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Make sure the aggregate checkout is "self-contained". Make sure the parent versions of the svn:externals modules point back to the correct root pom. Make sure the properties
   * used to figure out which version of the child modules to use, actually match up with the versions declared in the child modules.
   * 
   * @goal validatepoms
   */
  public class ValidatePomsMojo extends AbstractMojo {
  
  	SVNUtils svnUtils = SVNUtils.getInstance();
  	MojoHelper helper = MojoHelper.getInstance();
  
  	/**
  	 * Filename pattern used to discover Maven pom's
  	 * 
  	 * @parameter expression="${externals.pom}" default-value="pom.xml"
  	 */
  	private String pom;
  
  	/**
  	 * Directories to ignore when examining the file system for Maven pom's
  	 * 
  	 * @parameter expression="${externals.ignoreDirectories}" default-value="src,target,overlays,.svn,.git"
  	 */
  	private String ignoreDirectories;
  
  	/**
  	 * The Maven project object
  	 * 
  	 * @parameter expression="${project}"
  	 * @readonly
  	 */
  	private MavenProject project;
  
  	/**
  	 * These mappings connect the svn:externals definitions with a property inside the root pom that controls what version each external is set to
  	 * 
  	 * @parameter
  	 */
  	private List<Mapping> mappings;
  
  	@Override
  	public void execute() throws MojoExecutionException {
  		List<File> files = helper.getPoms(project.getBasedir(), pom, ignoreDirectories);
  		List<DefaultMutableTreeNode> nodes = helper.getNodes(files);
  		// Since this tree is based on the file system directory structure, it should always be a perfect tree
  		DefaultMutableTreeNode node = helper.getTree(project.getBasedir(), nodes, pom);
  		// Make sure each GAV is fully populated
  		helper.fillInGavs(node);
  		// Populate a map keyed by the GAV id
  		Map<String, DefaultMutableTreeNode> map = helper.getGavMap(node);
  		// Validate that all of the parents are contained in the map
  		helper.validateParents(node, map);
  		helper.validateMappings(project.getProperties(), mappings, node);
  		int depth = node.getDepth();
  		int size = nodes.size();
  		getLog().info("Validated " + size + " POM's.  Multi-module Maven project depth: " + depth);
  	}
  
  	public String getPom() {
  		return pom;
  	}
  
  	public void setPom(String pom) {
  		this.pom = pom;
  	}
  
  	public String getIgnoreDirectories() {
  		return ignoreDirectories;
  	}
  
  	public void setIgnoreDirectories(String ignoreDirectories) {
  		this.ignoreDirectories = ignoreDirectories;
 	}
 
 	public MavenProject getProject() {
 		return project;
 	}
 
 	public void setProject(MavenProject project) {
 		this.project = project;
 	}
 
 	public List<Mapping> getMappings() {
 		return mappings;
 	}
 
 	public void setMappings(List<Mapping> mappings) {
 		this.mappings = mappings;
 	}
 }