/*
    * Copyright 2001-2005 The Apache Software Foundation.
    *
    * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
    *
   * 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 net.sf.mavenizer.cli.commands;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.InputStream;
  
  import net.sf.mavenizer.MavenizerException;
  import net.sf.mavenizer.cli.exceptions.ProjectLoadingException;
  import net.sf.mavenizer.generators.Generator;
  import net.sf.mavenizer.generators.maven.repository.MavenRepositoryGenerator;
  import net.sf.mavenizer.io.reader.DefaultMavenizerProjectReader;
  import net.sf.mavenizer.io.reader.MavenizerProjectReader;
  import net.sf.mavenizer.model.Project;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  
  /***
   * @author <a href="mailto:cedric-vidal@users.sourceforge.net">C&eacute;dric
   *         Vidal</a>
   * 
   */
  public class Generate {
  
  	private static final Log log = LogFactory.getLog(Generate.class);
  
  	private File rootDir;
  
  	private File workDir;
  
  	private File repoDir;
  
  	private File projectFile;
  
  	private MavenizerProjectReader mavenizerProjectReader;
  
  	private File tempDir;
  
  	private Generator generator;
  
  	public void execute() throws MavenizerException {
  		log.info("Generating " + getProjectFile() + " to " + getRepoDir());
  		Project mavenizer = loadProject();
  		getGenerator().generate(mavenizer);
  		log.info("Finished");
  	}
  
  	protected Project loadProject() throws MavenizerException {
  		Project mavenizer = null;
  		InputStream inputStream = null;
  		try {
  			inputStream = new FileInputStream(getProjectFile());
  			mavenizer = getMavenizerProjectReader().read(inputStream);
  		} catch (FileNotFoundException e) {
  			throw new ProjectLoadingException(e);
  		} finally {
  			if (inputStream != null) {
  				try {
  					inputStream.close();
  				} catch (IOException e) {
  					throw new ProjectLoadingException(e);
  				}
  			}
  		}
  		return mavenizer;
  	}
  
  	private MavenizerProjectReader getMavenizerProjectReader() {
  		if (mavenizerProjectReader == null) {
  			mavenizerProjectReader = new DefaultMavenizerProjectReader();
  		}
  		return mavenizerProjectReader;
  	}
  
  	/***
  	 * @return Returns the rootDir.
  	 */
  	public File getRootDir() {
  		return rootDir;
  	}
 
 	/***
 	 * @param rootDir
 	 *            The rootDir to set.
 	 */
 	public void setRootDir(File rootDir) {
 		this.rootDir = rootDir;
 	}
 
 	/***
 	 * @return Returns the workDir.
 	 */
 	public File getWorkDir() {
 		if (workDir == null) {
 			workDir = new File(getRootDir(), "work");
 		}
 		return workDir;
 	}
 
 	/***
 	 * @param workDir
 	 *            The workDir to set.
 	 */
 	public void setWorkDir(File workDir) {
 		this.workDir = workDir;
 	}
 
 	/***
 	 * @return Returns the tempDir.
 	 */
 	public File getTempDir() {
 		if (tempDir == null) {
 			tempDir = new File(getRootDir(), "temp");
 		}
 		return tempDir;
 	}
 
 	/***
 	 * @param tempDir
 	 *            The tempDir to set.
 	 */
 	public void setTempDir(File tempDir) {
 		this.tempDir = tempDir;
 	}
 
 	/***
 	 * @return Returns the projectFile.
 	 */
 	public File getProjectFile() {
 		if (projectFile == null) {
 			projectFile = new File(getWorkDir(), "mavenizer.xml");
 		}
 		return projectFile;
 	}
 
 	/***
 	 * @param projectFile
 	 *            The projectFile to set.
 	 */
 	public void setProjectFile(File projectFile) {
 		this.projectFile = projectFile;
 	}
 
 	public Generator getGenerator() {
 		if (generator == null) {
 			generator = new MavenRepositoryGenerator();
 			generator.setOutputDir(getRepoDir());
 		}
 		return generator;
 	}
 
 	public void setMavenRepositoryGenerator(Generator generator) {
 		this.generator = generator;
 	}
 
 	public File getRepoDir() {
 		if (repoDir == null) {
 			repoDir = new File(getRootDir(), "repository");
 		}
 		return repoDir;
 	}
 
 	public void setRepoDir(File repoDir) {
 		this.repoDir = repoDir;
 	}
 
 }