/*
    * dpkg - Debian Package library and the Debian Package Maven plugin
    * (c) Copyright 2016 Gerrit Hohl
    *
    * This program is free software; you can redistribute it and/or
    * modify it under the terms of the GNU General Public License
    * as published by the Free Software Foundation; either version 2
    * of the License, or (at your option) any later version.
    *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   */
  package net.sourceforge.javadpkg.plugin.impl;
  
  import java.io.File;
  import java.io.IOException;
  
  import org.apache.maven.plugin.logging.Log;
  
  import net.sourceforge.javadpkg.Context;
  import net.sourceforge.javadpkg.Copyright;
  import net.sourceforge.javadpkg.CopyrightLicense;
  import net.sourceforge.javadpkg.CopyrightParser;
  import net.sourceforge.javadpkg.FilesCopyright;
  import net.sourceforge.javadpkg.ParseException;
  import net.sourceforge.javadpkg.impl.CopyrightImpl;
  import net.sourceforge.javadpkg.impl.CopyrightLicenseImpl;
  import net.sourceforge.javadpkg.impl.CopyrightParserImpl;
  import net.sourceforge.javadpkg.impl.FilesCopyrightImpl;
  import net.sourceforge.javadpkg.io.DataSource;
  import net.sourceforge.javadpkg.io.impl.DataFileSource;
  import net.sourceforge.javadpkg.plugin.CopyrightConfigurationParser;
  import net.sourceforge.javadpkg.plugin.cfg.CopyrightConfiguration;
  import net.sourceforge.javadpkg.plugin.cfg.CopyrightFilesConfiguration;
  import net.sourceforge.javadpkg.plugin.cfg.CopyrightLicenseConfiguration;
  
  
  /**
   * <p>
   * A {@link CopyrightConfigurationParser} implementation.
   * </p>
   *
   * @author Gerrit Hohl (gerrit-hohl@users.sourceforge.net)
   * @version <b>1.0</b>, 09.05.2016 by Gerrit Hohl
   */
  public class CopyrightConfigurationParserImpl implements CopyrightConfigurationParser {
  	
  	
  	/** The parser for the copyright. */
  	private CopyrightParser copyrightParser;
  	
  	
  	// TODO Check configuration(s).
  	
  	
  	/**
  	 * <p>
  	 * Creates a parser.
  	 * </p>
  	 */
  	public CopyrightConfigurationParserImpl() {
  		super();
  		
  		this.copyrightParser = new CopyrightParserImpl();
  	}
  
  
  	@Override
  	public Copyright parseCopyrightConfiguration(Log log, CopyrightConfiguration config, Context context)
  			throws IOException, ParseException {
  		
  		Copyright copyright;
  		File file;
  
  
  		if (config == null)
  			throw new IllegalArgumentException("Argument config is null.");
  		if (context == null)
  			throw new IllegalArgumentException("Argument context is null.");
  		
  		file = config.getFile();
  		if (file != null) {
  			copyright = this.parseFile(log, file, context);
  		} else {
  			copyright = this.parseConfiguration(log, config, context);
  		}
  
  		return copyright;
  	}
  
  
  	/**
  	 * <p>
 	 * Parses the copyright from the specified file.
 	 * </p>
 	 *
 	 * @param log
 	 *            The log.
 	 * @param file
 	 *            The file.
 	 * @param context
 	 *            The context.
 	 * @return The copyright.
 	 * @throws IOException
 	 *             If an I/O error occurs.
 	 * @throws ParseException
 	 *             If an error occurs during the parsing.
 	 */
 	private Copyright parseFile(Log log, File file, Context context) throws IOException, ParseException {
 		Copyright copyright;
 
 
 		if (log.isInfoEnabled()) {
 			log.info("Read copyright from file |" + file.getAbsolutePath() + "|.");
 		}
 		try {
 			try (DataSource source = new DataFileSource(file)) {
 				copyright = this.copyrightParser.parseCopyright(source, context);
 			}
 		} catch (IOException e) {
 			throw new IOException("Couldn't parse the copyright file |" + file.getAbsolutePath() + "|: " + e.getMessage(), e);
 		} catch (ParseException e) {
 			throw new IOException("Couldn't parse the copyright file |" + file.getAbsolutePath() + "|: " + e.getMessage(), e);
 		}
 		return copyright;
 	}
 	
 	
 	/**
 	 * <p>
 	 * Parses the copyright from the specified configuration.
 	 * </p>
 	 *
 	 * @param log
 	 *            The log.
 	 * @param config
 	 *            The configuration.
 	 * @param context
 	 *            The context.
 	 * @return The copyright.
 	 * @throws ParseException
 	 *             If an error occurs during the parsing.
 	 */
 	private Copyright parseConfiguration(Log log, CopyrightConfiguration config, Context context) throws ParseException {
 		CopyrightImpl copyright;
 		FilesCopyright filesCopyright;
 		CopyrightLicense license;
 
 
 		if (log.isInfoEnabled()) {
 			log.info("Read copyright from configuration.");
 		}
 		copyright = new CopyrightImpl();
 		copyright.setUpstreamName(config.getUpstreamName());
 		copyright.setUpstreamContact(config.getUpstreamContact());
 		copyright.setSource(config.getSource());
 		copyright.setDisclaimer(config.getDisclaimer());
 		copyright.setComment(config.getComment());
 		copyright.setLicense(this.parseLicenseConfiguration(config.getLicense(), context));
 		copyright.setCopyright(config.getCopyright());
 		for (CopyrightFilesConfiguration cfg : config.getFiles()) {
 			filesCopyright = this.parseFilesConfiguration(cfg, context);
 			copyright.addFilesCopyright(filesCopyright);
 		}
 		for (CopyrightLicenseConfiguration cfg : config.getLicenses()) {
 			license = this.parseLicenseConfiguration(cfg, context);
 			copyright.addLicense(license);
 		}
 		return copyright;
 	}
 
 
 	/**
 	 * <p>
 	 * Parses the license from the specified configuration.
 	 * </p>
 	 *
 	 * @param config
 	 *            The configuration.
 	 * @param context
 	 *            The context.
 	 * @return The copyright.
 	 * @throws ParseException
 	 *             If an error occurs during the parsing.
 	 */
 	private CopyrightLicense parseLicenseConfiguration(CopyrightLicenseConfiguration config, Context context)
 			throws ParseException {
 		
 		CopyrightLicenseImpl license;
 
 
 		if (config == null)
 			return null;
 		
 		license = new CopyrightLicenseImpl();
 		license.setName(config.getName());
 		license.setText(config.getText());
 
 		return license;
 	}
 
 
 	/**
 	 * <p>
 	 * Parses the copyright for certain files from the specified configuration.
 	 * </p>
 	 *
 	 * @param config
 	 *            The configuration.
 	 * @param context
 	 *            The context.
 	 * @return The copyright.
 	 * @throws ParseException
 	 *             If an error occurs during the parsing.
 	 */
 	private FilesCopyright parseFilesConfiguration(CopyrightFilesConfiguration config, Context context) throws ParseException {
 		FilesCopyrightImpl files;
 		
 		
 		if (config == null)
 			return null;
 		
 		files = new FilesCopyrightImpl();
 		files.setFiles(config.getFiles());
 		files.setCopyright(config.getCopyright());
 		files.setLicense(this.parseLicenseConfiguration(config.getLicense(), context));
 		files.setComment(config.getComment());
 		
 		return files;
 	}
 
 
 }