/**
    * Copyright 2004-2012 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.apache.torque.mojo;
  
  import java.io.File;
  import java.util.List;
  
  import org.apache.commons.configuration.PropertiesConfiguration;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.torque.util.ChangeDetector;
  import org.apache.torque.util.SimpleScanner;
  import org.kuali.core.db.torque.KualiTorqueDataSQLTask;
  
  /**
   * Generates platform specific SQL from database agnostic XML files. Each SQL file created by this goal contains data
   * for a single table. The database platform to generate SQL for is determined by ${targetDatabase}. See also
   * <code>impex:schemasql</code>
   * 
   * @goal datasql
   * @phase generate-sources
   */
  public class DataSqlMojo extends DataModelTaskMojo {
  	/**
  	 * The directory in which the SQL will be generated.
  	 * 
  	 * @parameter property="outputDir" expression="${outputDir}" default-value="${project.build.directory}/classes/sql"
  	 * @required
  	 */
  	@SuppressWarnings("unused")
  	private String dummy;
  
  	/**
  	 * The location where the SQL file will be generated.
  	 * 
  	 * @parameter property="reportFile" expression="${reportFile}"
  	 *            default-value="../../../reports/report.${project.artifactId}-data.sql"
  	 */
  	@SuppressWarnings("unused")
  	private String dummy2;
  
  	/**
  	 * The location where the context property file for velocity will be generated.
  	 * 
  	 * @parameter property="contextPropertiesPath" expression="${contextPropertiesPath}"
  	 *            default-value="${project.build.directory}/reports/context.datasql.properties"
  	 */
  	@SuppressWarnings("unused")
  	private String dummy3;
  
  	/**
  	 * Only run this mojo if the data or schema has changed since the last run
  	 * 
  	 * @parameter expression="${runOnlyOnChange}" default-value="true"
  	 * @required
  	 */
  	private boolean runOnlyOnChange;
  
  	/**
  	 * The XML file describing the database schema
  	 * 
  	 * @parameter expression="${schemaXMLFile}" default-value="${basedir}/src/main/impex/${project.artifactId}.xml"
  	 * @required
  	 */
  	private File schemaXMLFile;
  
  	/**
  	 * The directory containing data XML files
  	 * 
  	 * @parameter expression="${dataXMLDir}" default-value="${basedir}/src/main/impex"
  	 * @required
  	 */
  	private File dataXMLDir;
  
  	/**
  	 * The default set of files in that directory to include (ant style notation)
  	 * 
  	 * @parameter expression="${dataXMLIncludes}" default-value="*.xml"
  	 * @required
  	 */
  	private String dataXMLIncludes;
  
  	/**
  	 * The default set of files in that directory to exclude (ant style notation)
  	 * 
  	 * @parameter expression="${dataXMLExcludes}" default-value="${project.artifactId}.xml"
  	 */
 	private String dataXMLExcludes;
 
 	/**
 	 * The DTD for the data XML files
 	 * 
 	 * @parameter expression="${dataDTD}"
 	 *            default-value="${project.build.directory}/generated-impex/${project.artifactId}.dtd"
 	 * @required
 	 */
 	private File dataDTD;
 
 	@Override
 	public void executeMojo() throws MojoExecutionException {
 		// loadPropertiesToMojo();
 		updateConfiguration();
 		validateConfiguration();
 		generateContextProperties();
 		configureTask();
 		addTargetDatabaseToOutputDir();
 		addTargetDatabaseToReportFile();
 		ChangeDetector schema = new ChangeDetector(getCanonicalReportFile(), getSchemaFiles());
 		ChangeDetector data = new ChangeDetector(getCanonicalReportFile(), getDataFiles());
 		if (!schema.isChanged() && !data.isChanged() && isRunOnlyOnChange()) {
 			getLog().info("------------------------------------------------------------------------");
 			getLog().info("Data and schema are unchanged.  Skipping generation.");
 			getLog().info("------------------------------------------------------------------------");
 			return;
 		}
 		getLog().info("------------------------------------------------------------------------");
 		getLog().info("Generating SQL for " + getTargetDatabase() + " from data XML files");
 		getLog().info("------------------------------------------------------------------------");
 		getAntTask().execute();
 	}
 
 	protected List<File> getDataFiles() {
 		return new SimpleScanner(getDataXMLDir(), getDataXMLIncludes(), getDataXMLExcludes()).getFiles();
 	}
 
 	/**
 	 * Returns the context properties for the Texen task.
 	 * 
 	 * @return The PropertiesConfiguration containing all context properties, not null.
 	 */
 	protected PropertiesConfiguration getMojoContextProperties() {
 		PropertiesConfiguration configuration = new PropertiesConfiguration();
 		configuration.addProperty(TARGET_DATABASE_CONTEXT_PROPERTY, super.getTargetDatabase());
 		return configuration;
 	}
 
 	/**
 	 * Configures the Texen task wrapped by this mojo
 	 */
 	protected void configureTask() throws MojoExecutionException {
 		KualiTorqueDataSQLTask task = new KualiTorqueDataSQLTask();
 		setAntTask(task);
 		super.configureTask();
 		task.setDataDTD(getDataDTD());
 		task.addFileset(getAntFileSet(getDataXMLDir(), getDataXMLIncludes(), getDataXMLExcludes()));
 		task.setXmlFile(getSchemaXMLFile().getAbsolutePath());
 		task.setTargetDatabase(getTargetDatabase());
 	}
 
 	/**
 	 * Returns the path to the control template.
 	 * 
 	 * @return "sql/load/Control.vm"
 	 */
 	protected String getControlTemplate() {
 		return "sql/load/Control.vm";
 	}
 
 	public String getDataXMLIncludes() {
 		return dataXMLIncludes;
 	}
 
 	public void setDataXMLIncludes(String dataXMLIncludes) {
 		this.dataXMLIncludes = dataXMLIncludes;
 	}
 
 	public String getDataXMLExcludes() {
 		return dataXMLExcludes;
 	}
 
 	public void setDataXMLExcludes(String dataXMLExcludes) {
 		this.dataXMLExcludes = dataXMLExcludes;
 	}
 
 	public File getDataXMLDir() {
 		return dataXMLDir;
 	}
 
 	public void setDataXMLDir(File dataXMLDir) {
 		this.dataXMLDir = dataXMLDir;
 	}
 
 	public File getSchemaXMLFile() {
 		return schemaXMLFile;
 	}
 
 	public void setSchemaXMLFile(File schemaXMLFile) {
 		this.schemaXMLFile = schemaXMLFile;
 	}
 
 	public boolean isRunOnlyOnChange() {
 		return runOnlyOnChange;
 	}
 
 	public void setRunOnlyOnChange(boolean runOnlyOnDataChange) {
 		this.runOnlyOnChange = runOnlyOnDataChange;
 	}
 
 	public File getDataDTD() {
 		return dataDTD;
 	}
 
 	public void setDataDTD(File dataDTD) {
 		this.dataDTD = dataDTD;
 	}
 
 }