/*
    * 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.FileFilter;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  import net.sf.mavenizer.MavenizerException;
  import net.sf.mavenizer.analyser.scanner.ScannerFileFilter;
  import net.sf.mavenizer.cli.exceptions.ProjectSavingException;
  import net.sf.mavenizer.core.Mavenizer;
  import net.sf.mavenizer.core.loader.DefaultJarLoader;
  import net.sf.mavenizer.io.writer.DefaultMavenizerProjectWriter;
  import net.sf.mavenizer.io.writer.MavenizerProjectWriter;
  
  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 Analyse {
  
  	private static final Log log = LogFactory.getLog(Analyse.class);
  
  	private File rootDir;
  
  	private List searchDirList = new ArrayList();
  
  	private File workDir;
  
  	private File tempDir;
  
  	private File projectFile;
  
  	private MavenizerProjectWriter mavenizerProjectWriter;
  
  	private FileFilter fileFilter;
  
  	public Analyse() {
  		super();
  	}
  
  	public void execute() throws MavenizerException {
  
  		Mavenizer mavenizer = new Mavenizer();
  
  		for (Iterator i = getSearchDirList().iterator(); i.hasNext();) {
  			String dirPath = (String) i.next();
  			addJars(new File(dirPath), mavenizer);
  		}
  
  		DefaultJarLoader defaultJarLoader = new DefaultJarLoader();
  		defaultJarLoader.setTempDir(getTempDir());
  		mavenizer.setJarLoader(defaultJarLoader);
  		mavenizer.start();
  
  		saveProject(mavenizer);
  	}
  
  	protected void saveProject(Mavenizer mavenizer) throws MavenizerException {
  		getWorkDir().mkdirs();
  		OutputStream out = null;
  		try {
  			out = new FileOutputStream(getProjectFile());
  			getMavenizerProjectWriter().write(mavenizer, out);
  		} catch (FileNotFoundException e) {
  			throw new ProjectSavingException(e);
  		} finally {
  			if (out != null) {
  				try {
  					out.close();
  				} catch (IOException e) {
  					throw new ProjectSavingException(e);
  				}
  			}
 		}
 	}
 
 	static final String EXTENSION_JAR = ".jar";
 
 	private void addJars(File file, Mavenizer builder) {
 
 		if (file.isDirectory()) {
 			File[] files = file.listFiles(getFileFilter());
 			for (int i = 0; i < files.length; i++) {
 				File childFile = files[i];
 				addJars(childFile, builder);
 			}
 		} else if (file.getName().endsWith(EXTENSION_JAR)) {
 			builder.getJarFiles().add(file);
 		}
 
 	}
 
 	protected FileFilter getFileFilter() {
 		if (fileFilter == null) {
 			fileFilter = new ScannerFileFilter();
 		}
 		return fileFilter;
 	}
 
 	/***
 	 * @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 jarList.
 	 */
 	public List getSearchDirList() {
 		return searchDirList;
 	}
 
 	/***
 	 * @param jarList
 	 *            The jarList to set.
 	 */
 	public void setSearchDirList(List jarList) {
 		this.searchDirList = jarList;
 	}
 
 	/***
 	 * @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;
 	}
 
 	/***
 	 * @return Returns the mavenizerProjectWriter.
 	 */
 	public MavenizerProjectWriter getMavenizerProjectWriter() {
 		if (mavenizerProjectWriter == null) {
 			mavenizerProjectWriter = new DefaultMavenizerProjectWriter();
 		}
 		return mavenizerProjectWriter;
 	}
 
 	/***
 	 * @param mavenizerProjectWriter
 	 *            The mavenizerProjectWriter to set.
 	 */
 	public void setMavenizerProjectWriter(
 			MavenizerProjectWriter mavenizerProjectWriter) {
 		this.mavenizerProjectWriter = mavenizerProjectWriter;
 	}
 
 }