/**
    * Copyright 2010-2013 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.common.util.property.processor;
  
  import java.io.File;
  import java.util.Properties;
  
  import org.apache.commons.lang3.StringUtils;
  import org.kuali.common.util.OrgUtils;
  import org.kuali.common.util.Str;
  import org.kuali.common.util.maven.MavenConstants;
  import org.kuali.common.util.project.KualiProjectConstants;
  import org.kuali.common.util.project.ProjectUtils;
  import org.kuali.common.util.project.model.Project;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.util.Assert;
  
  /**
   * This processor is called *very* early in the Maven build lifecyle in order to augment the default set of Maven properties.
   */
  public class ProjectProcessor implements PropertyProcessor {
  
  	private static final Logger logger = LoggerFactory.getLogger(ProjectProcessor.class);
  
  	private static final String KS_GROUP_ID = KualiProjectConstants.STUDENT_GROUP_ID;
  	private static final String FS = File.separator;
  	private static final String DOT = ".";
  	private static final String PROJECT_GROUP_ID_PATH = "project.groupId.path";
  
  	@Override
  	public void process(Properties properties) {
  
  		// Make sure we are configured correctly
  		Assert.notNull(properties, "properties are null");
  
  		// Make sure groupId, artifactId, orgId, and orgCode are present
  		validate(properties);
  
  		// Fix the funk in KS groupId's (if its a KS project)
  		fixKSGroupIds(properties);
  
  		// Now that the groupId is fixed, it is safe to use the properties to get a project object
  		Project p = ProjectUtils.getProject(properties);
  
  		// Extract org info
  		String orgId = properties.getProperty(MavenConstants.ORG_ID_KEY);
  		String orgCode = properties.getProperty(MavenConstants.ORG_ID_CODE_KEY);
  
  		// Figure out the group code (eg "rice", "student", "ole", etc)
  		String groupCode = OrgUtils.getGroupCode(orgId, p.getGroupId());
  
  		// Setup some org and group paths based on user.home
  		String userHome = System.getProperty("user.home");
  		String orgHome = userHome + FS + DOT + orgCode;
  		String groupHome = orgHome + FS + groupCode;
  
  		// Store the org and group paths
  		properties.setProperty(PROJECT_GROUP_ID_PATH, Str.getPath(p.getGroupId()));
  		properties.setProperty("project.orgId.home", orgHome);
  		properties.setProperty("project.groupId.home", groupHome);
  		properties.setProperty("project.home", groupHome);
  
  		// Store the groupCode
  		properties.setProperty("project.groupId.code", groupCode);
  
  		// Add the current milliseconds value as a project property
  		properties.setProperty("project.build.timestamp.millis", Long.toString(System.currentTimeMillis()));
  
  	}
  
  	// Make sure the properties hold basic project identifier info
  	protected void validate(Properties properties) {
  		Assert.notNull(properties.getProperty(MavenConstants.GROUP_ID_KEY), MavenConstants.GROUP_ID_KEY + " is null");
  		Assert.notNull(properties.getProperty(MavenConstants.ARTIFACT_ID_KEY), MavenConstants.ARTIFACT_ID_KEY + " is null");
  		Assert.notNull(properties.getProperty(MavenConstants.ORG_ID_KEY), MavenConstants.ORG_ID_KEY + " is null");
  		Assert.notNull(properties.getProperty(MavenConstants.ORG_ID_CODE_KEY), MavenConstants.ORG_ID_CODE_KEY + " is null");
  	}
  
  	protected void fixKSGroupIds(Properties properties) {
  		// Extract the groupId
  		String groupId = properties.getProperty(MavenConstants.GROUP_ID_KEY);
  
  		// Only muck with KS projects
  		if (!StringUtils.startsWith(groupId, KS_GROUP_ID)) {
  			return;
 		}
 
 		// All KS projects should have a groupId of "org.kuali.student" no matter what
 		properties.setProperty(MavenConstants.GROUP_ID_KEY, KualiProjectConstants.STUDENT_GROUP_ID);
 
 		// If this KS project is using some other group id for some reason
 		// Store it in project.properties just for posterity
 		if (!StringUtils.equals(groupId, KualiProjectConstants.STUDENT_GROUP_ID)) {
 			logger.debug("original={}", groupId);
 			properties.setProperty(MavenConstants.GROUP_ID_ORIGINAL_KEY, groupId);
 		}
 	}
 
 }