/**
   The contents of this file are subject to the Mozilla Public License Version 1.1 
   (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.mozilla.org/MPL/ 
   Software distributed under the License is distributed on an "AS IS" basis, 
   WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the 
   specific language governing rights and limitations under the License. 
   
   The Original Code is "DataTypeGenerator.java".  Description: 
  "Generates skeletal source code for Datatype classes based on the 
    HL7 database" 
  
  The Initial Developer of the Original Code is University Health Network. Copyright (C) 
  2001.  All Rights Reserved. 
  
  Contributor(s):  James Agnew 
  
  Alternatively, the contents of this file may be used under the terms of the 
  GNU General Public License (the  �GPL�), in which case the provisions of the GPL are 
  applicable instead of those above.  If you wish to allow use of your version of this 
  file only under the terms of the GPL and not to allow others to use your version 
  of this file under the MPL, indicate your decision by deleting  the provisions above 
  and replace  them with the notice and other provisions required by the GPL License.  
  If you do not delete the provisions above, a recipient may use your version of 
  this file under either the MPL or the GPL. 
  
  */
  
  package ca.uhn.hl7v2.mvnplugin;
  
  import java.io.File;
  import java.io.IOException;
  import java.sql.SQLException;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.project.MavenProject;
  
  import ca.uhn.hl7v2.HL7Exception;
  import ca.uhn.hl7v2.database.NormativeDatabase;
  import ca.uhn.hl7v2.sourcegen.EventMapGenerator;
  import ca.uhn.hl7v2.sourcegen.SourceGenerator;
  
  /**
   * Maven Plugin Mojo for generating HAPI HL7 message/segment/etc source files
   * 
   * @author <a href="mailto:jamesagnew@sourceforge.net">James Agnew</a>
   * @goal sourcegen
   * @phase generate-sources
   * @requiresDependencyResolution runtime
   * @requiresProject
   * @inheritedByDefault false
   */
  public class SourceGenMojo extends AbstractMojo
  {
      private static final Set<String> alreadyMade = new HashSet<>();
      
      /**
       * The maven project.
       * 
       * @parameter property="project"
       * @required
       * @readonly
       */
      private MavenProject project;
  
      
      /**
       * The target directory for the generated source
       * 
       * @parameter
       * @required
       */
      private String targetDirectory;
  
      /**
       * The target directory for the generated resources
       * 
       * @parameter
       * @required
       */
      private String targetResourceDirectory;
  
      /**
       * The version for the generated source
       * 
       * @parameter
       */
      private String version;
      
      /**
       * Should we use the default group names on v2.3.1
       * 
       * @parameter
       */
      private boolean forceGroupNames;
      
     /**
      * The JDBC URL for the HL7 database
      * 
      * @parameter
      */
     private String jdbcUrl;
 
     /**
      * The JDBC User for the HL7 database
      * 
      * @parameter
      */
     private String jdbcUser;
 
     /**
      * The JDBC Password for the HL7 database
      * 
      * @parameter
      */
     private String jdbcPassword;
 
     
     /**
      * Should build be skipped
      *
      * @parameter
      */
     private boolean skip;
 
     /**
      * The package from which to load the templates
      * 
      * @parameter default="ca.uhn.hl7v2.sourcegen.templates"
      */
     private final String templatePackage = "ca.uhn.hl7v2.sourcegen.templates";
 
     /**
      * Should structures be treated as resources
      *
      * @parameter default="false"
      */
     private boolean structuresAsResources;
 
     /**
      * {@inheritDoc}
      */
     public void execute() throws MojoExecutionException {
 
         if (skip) {
             getLog().warn("Configured to skip");
         }
         
         if (forceGroupNames) {
         	System.setProperty("force.group", "true");
         } else {
         	System.setProperty("force.group", "false");
         }
 
     	if (new File(targetDirectory).exists()) {
             getLog().warn("Already exists version " + version + ", skipping!");
     	} else if (!alreadyMade.contains(version)) {
 
     		// I haven't entirely figured out why, but Maven runs this plugin 
     		// several times for each version, which takes forever, so we assume
     		// that if the directory exists, we don't need to generate again
             alreadyMade.add(version);
             
             if (jdbcUser == null) {
                 jdbcUser = "";
             }
             if (jdbcPassword == null) {
                 jdbcPassword = "";
             }
             
            System.setProperty(NormativeDatabase.PROP_DATABASE_USER, jdbcUser);
            System.setProperty(NormativeDatabase.PROP_DATABASE_PASSWORD, jdbcPassword);
            System.setProperty(NormativeDatabase.PROP_DATABASE_URL, jdbcUrl);
             
             try {
 				EventMapGenerator.generateEventMap(targetResourceDirectory, version);
 				String targetDir = structuresAsResources ? targetResourceDirectory : targetDirectory;
                 SourceGenerator.makeAll(targetDir, version, false, templatePackage, "java");
 			} catch (HL7Exception | IOException | SQLException e) {
 				throw new MojoExecutionException("Failed to build source ", e);
 			}
 
         } else {
             getLog().warn("Already made version " + version + ", skipping!");
         }
         
     	if (!structuresAsResources) {
     	    getLog().info("Adding " + targetDirectory + " to compile source root");
             project.addCompileSourceRoot(targetDirectory);
     	}
     }
 
 }