/**
    * Copyright 2009-2012 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.codehaus.mojo.properties;
  
  import java.util.Properties;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Parse version number properties into [major].[minor].[incremental].[qualifier]. The version parsing logic is crudely
   * simple. It splits the version string into tokens using both "." and "-" as delimiters. It assumes the first token is
   * "major", the second token is "minor" the third token is "incremental" and the fourth token is "qualifier".
   *
   * @goal parse-version-properties
   */
  public class ParseVersionPropertiesMojo extends AbstractMojo {
  
      /**
       * @parameter default-value="${project}"
       * @required
       * @readonly
       */
      private MavenProject project;
  
      /**
       * The list of properties containing version numbers to parse
       *
       * @parameter
       * @required
       */
      private String[] properties;
  
      @Override
      public void execute() throws MojoExecutionException {
          Properties props = project.getProperties();
          for (String key : properties) {
              String value = getProperty(key);
              if (StringUtils.isBlank(value)) {
                  continue;
              }
              Version version = parseVersion(value);
              setProjectProperty(key, "major", version.getMajor(), props);
              setProjectProperty(key, "minor", version.getMinor(), props);
              setProjectProperty(key, "incremental", version.getIncremental(), props);
              setProjectProperty(key, "qualifier", version.getQualifier(), props);
          }
      }
  
      protected void setProjectProperty(String key, String suffix, String value, Properties props) {
          if (StringUtils.isBlank(value)) {
              return;
          }
          props.setProperty(key + "." + suffix, value);
          getLog().info("Setting " + key + "." + suffix + "=" + value);
      }
  
      protected Version parseVersion(String s) {
          Version version = new Version();
          String[] tokens = StringUtils.split(s, ".-");
          if (tokens.length > 0) {
              version.setMajor(tokens[0]);
          }
          if (tokens.length > 1) {
              version.setMinor(tokens[1]);
          }
          if (tokens.length > 2) {
              version.setIncremental(tokens[2]);
          }
          if (tokens.length > 3) {
              version.setQualifier(tokens[3]);
          }
          return version;
      }
  
      protected String getProperty(String key) {
          String sys = System.getProperty(key);
          String proj = project.getProperties().getProperty(key);
          if (!StringUtils.isBlank(sys)) {
              return sys;
          } else {
              return proj;
          }
  
     }
 
     public String[] getProperties() {
         return properties;
     }
 
     public void setProperties(String[] properties) {
         this.properties = properties;
     }
 }