/*
 *   Copyright 2013 Brian Rosenberger (Brutex Network)
 *
 *   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.brutex.emitter;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.StringWriter;
import java.math.BigInteger;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.UUID;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;












import javax.xml.ws.BindingProvider;

import net.brutex.emitter.util.EmitterUtil;
import net.brutex.sbm.sbmappservices72.AEWebservicesFaultFault;
import net.brutex.sbm.sbmappservices72.Sbmappservices72;
import net.brutex.sbm.sbmappservices72.Sbmappservices72PortType;
import net.brutex.sbm.sbmappservices72.api.Auth;
import net.brutex.sbm.sbmappservices72.api.MultipleResponseItemOptions;
import net.brutex.sbm.sbmappservices72.api.ObjectFactory;
import net.brutex.sbm.sbmappservices72.api.SectionsOption;
import net.brutex.sbm.sbmappservices72.api.TTItemList;
import net.brutex.sbm.sbmappservices72.api.TableIdentifier;
import net.brutex.svn.SVNCommitInfo;
import net.brutex.svn.SVNLookExecutor;

import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMComment;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMNamespace;
import org.apache.axiom.om.OMNode;
import org.apache.axiom.om.OMText;
import org.apache.axiom.om.OMXMLBuilderFactory;
import org.apache.axiom.om.xpath.AXIOMXPath;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.BasicParser;
import org.apache.commons.cli.ParseException;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.cxf.endpoint.Client;
import org.apache.cxf.frontend.ClientProxy;
import org.apache.cxf.interceptor.LoggingInInterceptor;
import org.apache.cxf.interceptor.LoggingOutInterceptor;
import org.apache.cxf.message.Message;
import org.apache.http.client.ClientProtocolException;
import org.apache.log4j.Logger;
import org.jaxen.JaxenException;


/**
 * The Class ALFEmitter.
 *
 * @author Brian Rosenberger, bru(at)brutex.de
 * @since 0.1
 */
public class ALFEmitter {
	
	public static final String VERSION = "0.1";
	private static Logger logger = Logger.getRootLogger();
	
	//
	// Keys to read from the configuration file.
	//
	private static final String OPTION_SVNLOOK = "svnlook";
	private static final String OPTION_ISSUEPATTERN = "issuepattern";
	
	private static final String OPTION_EVENTTEMPLATE = "eventtemplate";
	private static final String OPTION_EVENTNAMESPACE = "eventnamespace";
	private static final String OPTION_EVENTMANAGER_URL = "eventmanager";
	private static final String OPTION_EVENTMANAGER_USER = "eventmanager.user";
	private static final String OPTION_EVENTMANAGER_PASSWORD = "eventmanager.password";
	
	private static final String OPTION_SBM_ENDPOINT = "sbmappservices72";
	private static final String OPTION_SBM_USER = "sbmuser";
	private static final String OPTION_SBM_PASSWORD = "sbmpassword";
	private static final String OPTION_SBM_TABLE = "querytable";
	private static final String OPTION_SBM_QUERY = "query";

	
	private static final String OPTION_MARKER_LOGMESSAGE = "marker.logmessage";
	private static final String OPTION_MARKER_AUTHOR = "marker.author";
	private static final String OPTION_MARKER_REVISION = "marker.revision";
	private static final String OPTION_MARKER_ADDEDFILES = "marker.addedfiles";
	private static final String OPTION_MARKER_DELETEDFILES = "marker.deletedfiles";
	private static final String OPTION_MARKER_CHANGEDFILES = "marker.changedfiles";
	private static final String OPTION_MARKER_ISSUES = "marker.issues";
	private static final String OPTION_MARKER_INTERNALISSUES = "marker.internalissues";
	private static final String OPTION_REMOVE_ISSUES_FROM_COMMIT = "removeissuesfromcommit";
	
	private static final String OPTION_IS_SOAPENABLED = "isSoapEnabled";
	private static final String OPTION_IS_DROPENABLED = "isDropResponse";
	private static final String OPTION_IS_FORCEFAILENABLED = "forcefail";
	private static final String OPTION_IS_VERIFICATIONENABLED = "isWithVerification";
	private static final String OPTION_IS_WSTRACE = "trace";
	private static final String OPTION_IS_XMLPROCESSINGENABLED = "isXmlProcessingEnabled";

	//
	// Command line parameters
	//
	private static final String PARAM_REPOS = "repos";
	private static final String PARAM_TXN = "txn";
	private static final String PARAM_REV = "rev";
	private static final String PARAM_CONFIG = "conf";
	
	//
	// Member variables
	//
	private final String repos;
	private final String txn;
	private final String rev;
	private SVNCommitInfo info;
	private OMElement template = null;
	private Configuration config;
	private String nss = null;
	private final long startTime;
	
	//Member for SBM endpoint configuration
	private final String endpoint;
	private final String sbm_user;
	private final String sbm_pass;
	private final String querytable;
	private final String query;

	
	private final List<String> internalissues = new ArrayList<String>();
	
	/**
	 * The main method.
	 *
	 * @param args the arguments
	 */
	public static void main(String[] args) {
		long startTime = System.currentTimeMillis();
		CommandLineParser parser = new BasicParser();
		CommandLine cmd = null;
		try {
			cmd = parser.parse( getOptions(), args);
		} catch (ParseException e1) {
			logger.error(e1.getMessage());
			printHelp();
			System.exit(1);
		}
		try {
			ALFEmitter emitter = new ALFEmitter(cmd, startTime);
		} catch (ConfigurationException e) {
			System.exit(1);
		}
		long endTime = System.currentTimeMillis();
		logger.debug("Total execution took '"+(endTime-startTime)+"' milliseconds.");
		System.exit(0);
	}
	
	/**
	 * Read a configuration parameter from the config file
	 * Creates log messages according to parameters.
	 * 
	 * @param key				property name
	 * @param defaultValue		default value or null
	 * @param isRequired		wether or not this is a required option
	 * @param logmessage		optional log message (or null)
	 * @return					property value
	 * @throws ConfigurationException
	 */
	private Object readConfProperty(String key, Object defaultValue, boolean isRequired, PropertyType type, String logmessage) throws ConfigurationException {
		Object value = null;
		switch (type) {
		case BOOLEAN:
			value = config.getBoolean(key, (Boolean) defaultValue);
			break;
		case STRINGARRAY:
			value = config.getStringArray(key);
			defaultValue = null;
			break;

		default:
			value = config.getString(key, (String) defaultValue);
			break;
		}
		 
		if(isRequired && value == null) {
			//required property	
			if(defaultValue == null) {
				//No value, no default
				String s = String.format("Could not load a value for the key '%s' from the configuration file. This is a required property without a default.", key);
				logger.error(s);
				throw new ConfigurationException(s);
			}
			if(defaultValue!=null) {
				//No value, but default
				logger.debug(String.format("Using property value '%s' for key '%s'. This is the default value. The property is required.", value, key));
			}
		} 
		if( (! isRequired) && value == null) {
			//not required
			if(value == null && defaultValue == null) {
				//No value, no default
				String s = String.format("Could not load a value for the key '%s' from the configuration file. This property has no default, but it is optional anyway.", key);
				logger.warn(s);
			}
			if(value == null && defaultValue!=null) {
				//No value, but default
				logger.debug(String.format("Using property value '%s' for key '%s'. This is the default value. The property is optional.", value, key));
			}
		}
		if(value!=null) logger.debug(String.format("Using property value '%s' for key '%s'.", value, key));
		if(logmessage!=null) logger.info(logmessage);
		return value;
	}
	
	
	private String readConfPropertyAsString(String key, String defaultValue, boolean isRequired, String logmessage) throws ConfigurationException {
		return (String) readConfProperty(key, defaultValue, isRequired, PropertyType.STRING, logmessage);
	}
	private String[] readConfPropertyAsStringArray(String key, boolean isRequired, String logmessage) throws ConfigurationException {
		return (String[]) readConfProperty(key, null, isRequired, PropertyType.STRINGARRAY, logmessage);
	}
	private boolean readConfPropertyAsBoolean(String key, boolean defaultValue, boolean isRequired, String logmessage) throws ConfigurationException {
		Boolean b =  (Boolean) readConfProperty(key, defaultValue, isRequired, PropertyType.BOOLEAN, logmessage);
		return b.booleanValue();
	}
		
	private ALFEmitter(CommandLine cmd, long startTime) throws ConfigurationException {
		this.startTime = startTime;
		repos = cmd.getOptionValue(PARAM_REPOS);
		txn = cmd.getOptionValue(PARAM_TXN);
		rev = cmd.getOptionValue(PARAM_REV);
		String config_file = cmd.getOptionValue(PARAM_CONFIG, "emitter.properties");
		EmitterUtil.verifyFile(config_file, false, false);

		logger.debug(String.format("Using REPOS='%s' and TXN='%s'.", repos, txn));
	
		config = null;
		try {
			config = new PropertiesConfiguration(config_file);
		} catch (ConfigurationException e) {
			logger.error("Could not find/ load '"+config_file+"' file.", e);
			System.exit(1);
		}
		
		/*
		 * Load Properties from Configuration file
		 */
		//it might be interesting to look into SVNKit
		//for a pure Java implementation in future
			final String svnlook			=	readConfPropertyAsString(OPTION_SVNLOOK, null, true, null);
			EmitterUtil.verifyFile(svnlook, false, true);
			
			// Issue Id RegEx to parse commit message
			final String[] issuepatterns = readConfPropertyAsStringArray(OPTION_ISSUEPATTERN, false, null);
			StringBuilder sb = new StringBuilder(); for(String s : issuepatterns) sb.append(s);
			logger.debug(String.format("Using issue id patterns: '%s'.", sb.toString()));
			
			// Flags to indicate what should be done
			final boolean isSoapEnabled 	= readConfPropertyAsBoolean(OPTION_IS_SOAPENABLED, true, true, null);
			final boolean isXmlProcessingEnabled 	= readConfPropertyAsBoolean(OPTION_IS_XMLPROCESSINGENABLED, true, true, null);
			final boolean isWithVerification= readConfPropertyAsBoolean(OPTION_IS_VERIFICATIONENABLED, false, true, null);
			final boolean isRemoveIssues	= readConfPropertyAsBoolean(OPTION_REMOVE_ISSUES_FROM_COMMIT, false, true, "");
			
			/*
			 * SVNLook phase
			 * Use svnlook to obtain information from SVN
			 */
			SVNLookExecutor exec = new SVNLookExecutor(new File(svnlook), repos);
			if(cmd.hasOption(PARAM_TXN)) exec.setTXN(txn);
			if(cmd.hasOption(PARAM_REV)) exec.setRev(rev);
			info = exec.getCommitInfo();			
			info.parseIssues(issuepatterns, isRemoveIssues);
			
			logger.debug("SVNCommitInfo author: "+ info.getAuthor());
			SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
			String datestring = f.format(info.getDate());
			datestring= datestring.substring(0, 26) + ":" + datestring.substring(26); //hack into ISO 8601 format
			logger.debug("SVNCommitInfo date: "+ datestring);
			logger.debug("SVNCommitInfo log message: "+ info.getLogmessage());
			logger.debug("SVNCommitInfo file list: "+ info.getChangeFileListAsString());
			
			/*
			 * Verification phase
			 */
			boolean isTrace = false;
			if(isWithVerification) {
				sbm_user 					= 	readConfPropertyAsString(OPTION_SBM_USER, null, true, null);
				sbm_pass 					= 	readConfPropertyAsString(OPTION_SBM_PASSWORD, null, false, null);
				endpoint					= 	readConfPropertyAsString(OPTION_SBM_ENDPOINT, "http://localhost/gsoap/gsoap_ssl.dll?sbmappservices72", true, null);
				querytable					= 	readConfPropertyAsString(OPTION_SBM_TABLE, null, true, null);
				query						= 	readConfPropertyAsString(OPTION_SBM_QUERY, null, false, null);
				isTrace						=	readConfPropertyAsBoolean(OPTION_IS_WSTRACE, false, true, null);
			
				logger.debug(String.format("Starting verification for '%s' issues in the list.", info.getIssues().size()));
				boolean isOK = verify(info.getIssues(), isTrace);
				if(! isOK ) {
					logger.error("Verification of issue failed. No matching issue was found.");
					System.exit(1);
				}
			} else {
				sbm_user = null; sbm_pass=null; endpoint=null; querytable=null; query=null;
			}

			/*
			 * XML processing phase
			 */			
			if(isXmlProcessingEnabled) {
				
				
			}
			
			
			
			/*
			 * ALF Event Send phase
			 */
			String eventmanager = null;
			if(isSoapEnabled) {
				eventmanager 		= 	readConfPropertyAsString(OPTION_EVENTMANAGER_URL, null, true, null);
			}

			
			
		
		/**
		 * Event XML Erzeugen
		 */
		try {
			String resultxml=null;
			if(isXmlProcessingEnabled) {
				
				processXml();
				addALFSecurity();
				addEventHeader();
				
				// Serialize xml message to String
				StringWriter out = new StringWriter();
				template.getParent().serialize(out);
				out.flush();
				
				resultxml =  out.getBuffer().toString();
				logger.debug("ALFEvent result:\n"+resultxml);
		
			} else {
				logger.debug("Xml processing is deactivated.");
			}
		
			if(isSoapEnabled && isXmlProcessingEnabled) {
				final boolean isDropResponse 	= readConfPropertyAsBoolean(OPTION_IS_DROPENABLED, true, true, null);
				SimpleHttpEvent sender = new SimpleHttpEvent(eventmanager, resultxml);
				sender.sendSoap(isDropResponse);
				logger.debug(String.format("Sending/ receiving the soap message took '%s' milliseconds.", sender.getDuration()));
			} else {
				logger.warn("Sending soap message and/ or xml processing is deactivated.");
			}
			
			
		} catch (FileNotFoundException e) {
			logger.error(e.getMessage(), e);
			System.exit(1);
		} catch (ClientProtocolException e) {
			logger.error(e.getMessage(), e);
			System.exit(1);
		} catch (IOException e) {
			logger.error(e.getMessage(), e);
			System.exit(1);
		} catch (XMLStreamException e) {
			logger.error(e.getMessage(), e);
			System.exit(1);
		} catch (JaxenException e) {
			logger.error(e.getMessage(), e);
			System.exit(1);
		} finally {
			logger.debug("Total execution took '"+(System.currentTimeMillis()-startTime)+"' milliseconds.");
			String forcefail = config.getString(OPTION_IS_FORCEFAILENABLED, "");
			if(forcefail.length()>0) {
				logger.warn("Force fail is active. All commits will be blocked.");
				System.exit(1);
			}
			
		}
		
	}
		private void addEventHeader() throws JaxenException {
			AXIOMXPath path = new AXIOMXPath("//bru1:Base/bru1:EventId");
			path.addNamespace("bru1",  nss);
			OMElement n = (OMElement) path.selectSingleNode(template);
			if(n==null) {
				logger.error("<Base> element in message is incomplete. <EventId> is missing.");
			} else {
				n.addChild( n.getOMFactory().createOMText("1"));
			}
			
			path = new AXIOMXPath("//bru1:Base/bru1:ObjectId");
			path.addNamespace("bru1",  nss);
			n = (OMElement) path.selectSingleNode(template);
			if(n==null) {
				logger.error("<Base> element in message is incomplete. <ObjectId> is missing.");
			} else {
				n.addChild( n.getOMFactory().createOMText(info.getTxn() ));
			}
		}
	
		private void addALFSecurity() throws ConfigurationException, JaxenException {
			final String eventmanager_user 	= 	readConfPropertyAsString(OPTION_EVENTMANAGER_USER, null, false, null);
			final String eventmanager_pass 	= 	readConfPropertyAsString(OPTION_EVENTMANAGER_PASSWORD, null, false, null);
			AXIOMXPath path = new AXIOMXPath("//bru1:User");
			OMNamespace ns = template.findNamespace(nss, null);
			path.addNamespace("bru1", nss);
			OMElement n = (OMElement) path.selectSingleNode(template);
			if(n== null) { 
				logger.warn( String.format("<User> element was not found in namespace '%s'. Cannot add ALFSecurity elements. This is required since SBM 10.1.x.", nss));
			} else {
				/*
				 *  <ns:User>
            		<!--Optional:-->
               		<ns:ALFSecurity>
                  		<ns:UsernameToken>
                     		<ns:Username>admin</ns:Username>
                     		<ns:Password></ns:Password>
                  		</ns:UsernameToken>
               		</ns:ALFSecurity>
					</ns:User> 
				 */
				n.removeChildren();
				OMFactory fac = n.getOMFactory();
				fac.createOMComment(n, "Generated by SVN-ALFEmitter");
				OMElement sec = fac.createOMElement("ALFSecurity", ns);
				OMElement token = fac.createOMElement("UsernameToken", ns);
				OMElement user = fac.createOMElement("Username", ns);
				user.addChild( fac.createOMText(eventmanager_user));
				OMElement pass = fac.createOMElement("Password", ns);
				pass.addChild(fac.createOMText(eventmanager_pass, OMNode.CDATA_SECTION_NODE));
				token.addChild( user );
				token.addChild( pass);
				sec.addChild(token);
				n.addChild(sec);				
			}
		}
	
		private void processXml() throws ConfigurationException, JaxenException {
			// read additional configuration
			final String eventtemplate 		= 	readConfPropertyAsString(OPTION_EVENTTEMPLATE, null, true, null);
			EmitterUtil.verifyFile(eventtemplate, false, false);
			try {
				template = OMXMLBuilderFactory.createOMBuilder(new FileInputStream(new File(eventtemplate)))
						.getDocument().getOMDocumentElement();
			} catch (FileNotFoundException e1) {
				logger.error(String.format("Could not load XML event template from file '%s'.", eventtemplate), e1);
				System.exit(1);
			}
			nss 	= 	readConfPropertyAsString(OPTION_EVENTNAMESPACE, "http://www.eclipse.org/alf/schema/EventBase/1", true, null);
			final String marker_logmessage 	= 	readConfPropertyAsString(OPTION_MARKER_LOGMESSAGE, "@@logmessage@@", true, null);
			final String marker_author 		= 	readConfPropertyAsString(OPTION_MARKER_AUTHOR, "@@author@@", true, null);
			final String marker_revision	= 	readConfPropertyAsString(OPTION_MARKER_REVISION, "@@revision@@", true, null);
			final String marker_addedfiles 	= 	readConfPropertyAsString(OPTION_MARKER_ADDEDFILES, "@@addedfiles@@", true, null);
			final String marker_deletedfiles = 	readConfPropertyAsString(OPTION_MARKER_DELETEDFILES, "@@deletedfiles@@", true, null);
			final String marker_changedfiles = 	readConfPropertyAsString(OPTION_MARKER_CHANGEDFILES, "@@changedfiles@@", true, null);
			final String marker_fileselementname = readConfPropertyAsString("marker.fileselementname", "file", true, null);
			final String marker_issues 		= 	readConfPropertyAsString(OPTION_MARKER_ISSUES, "@@issues@@", true, null);
			final String marker_issueselementname = readConfPropertyAsString("marker.issueselementname", "issue", true, null);
			final String marker_internalissues    = readConfPropertyAsString(OPTION_MARKER_INTERNALISSUES, "@@internalissues@@", true, null);
	
			SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
			String datestring = f.format(info.getDate());
			datestring= datestring.substring(0, 26) + ":" + datestring.substring(26); //hack into ISO 8601 format
			
			// add content from SVNCommitInfo object where
			// XML commit markers are
			addElement( marker_logmessage, info.getLogmessage(), true);
			addElement(marker_author, info.getAuthor(), false);
			addElement(marker_revision, info.getRev(), false);
			addElement("@@timestamp@@", datestring, false);
			addElements(marker_changedfiles, info.getChangedFiles(), marker_fileselementname);
			addElements(marker_deletedfiles, info.getDeletedFiles(), marker_fileselementname);
			addElements(marker_addedfiles, info.getAddedFiles(), marker_fileselementname);
			addElements(marker_issues, info.getIssues(), marker_issueselementname);
			addElements(marker_internalissues, internalissues, marker_issueselementname);
			
		}
	
		private boolean verify(List<String> issues, boolean isTrace) {
		
			Sbmappservices72 ss = new Sbmappservices72(ClassLoader.getSystemResource("sbmappservices72.wsdl") );
			Sbmappservices72PortType port = ss.getSbmappservices72();
			
			Client client = ClientProxy.getClient(port);
			if(isTrace) {
		        client.getInInterceptors().add(new LoggingInInterceptor());
		        client.getOutInterceptors().add(new LoggingOutInterceptor());
			}
			BindingProvider bindingProvider = (BindingProvider) port;
	        bindingProvider.getRequestContext().put(
	        BindingProvider.ENDPOINT_ADDRESS_PROPERTY, endpoint);
			
			ObjectFactory fac = new ObjectFactory();
			Auth auth = fac.createAuth();
			auth.setUserId(fac.createAuthUserId(sbm_user));
			auth.setPassword(fac.createAuthPassword(sbm_pass));
			
			TableIdentifier table = fac.createTableIdentifier();
			table.setDbName(fac.createTableIdentifierDbName(querytable));
			
			MultipleResponseItemOptions options = fac.createMultipleResponseItemOptions();
			options.setSections(SectionsOption.SECTIONS_NONE);
			
			for(String issue : issues) {
				issue = issue.replaceAll("[^0-9]", "");
				String queryWhereClause = "TS_ISSUEID = '"+issue+"'";
				if(query!=null && query.length()>0) queryWhereClause = queryWhereClause + " And " + query;
				logger.debug(String.format("Using query against table '%s'. Query where clause: '%s'", querytable, queryWhereClause ));
				try {
					TTItemList items = port.getItemsByQuery(auth, table, queryWhereClause, "", null, BigInteger.valueOf(1), options);
					
					//Marshaller m = JAXBContext.newInstance(TTItemList.class).createMarshaller();
					//m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
					//m.marshal( new JAXBElement<TTItemList>(new QName("uri","local"), TTItemList.class, items), System.err);
					
					logger.debug(String.format("Got Response from getItemsByQuery"));
					if(items!=null) {
						logger.debug(String.format("Verification query matched '%s' item(s) for issue '%s.'",items.getTotalCount(), issue));
					}
					if(items.getTotalCount().intValue()<=0) {
						return false;
					} else {
						internalissues.add(items.getItem().get(0).getId().getValue().getTableIdItemId().getValue());
					}
					
				} catch (AEWebservicesFaultFault e) {
					logger.debug("Web service fault: " + e.getFaultInfo());
				} catch (Exception e) {
					logger.debug("Unknown Exception", e);
				}
			}
			return true;
		
	}

		private void addElement(String pattern, String newCdata, boolean wrapCDATA) throws JaxenException {
			OMComment comment = findComment(pattern);
			if(comment!=null) {
				OMFactory fac = OMAbstractFactory.getOMFactory();
				int type = OMNode.TEXT_NODE;
				if(wrapCDATA) {
					type = OMNode.CDATA_SECTION_NODE;
				}
				OMText text = fac.createOMText(newCdata, type);
				comment.insertSiblingAfter(text);
			}			
		}
		
		private void addElements(String pattern, List<String> files, String elementName) throws JaxenException {
			if(files.size()<=0) return;
			OMComment comment = findComment(pattern);
			if(comment!=null) {
				OMFactory fac = OMAbstractFactory.getOMFactory();
				OMNamespace ns = template.findNamespace(nss, null);
				if(ns == null) logger.error(String.format("The namespace '%s' is not defined in the template.", nss));
				for(String s : files) {
					OMElement e = fac.createOMElement(elementName, ns);
					OMText text = fac.createOMText(s, OMNode.TEXT_NODE);
					e.addChild(text);
					comment.insertSiblingAfter(e);
				}				
			}
		}
		
	
		private OMComment findComment(String pattern) throws JaxenException {
			AXIOMXPath path = new AXIOMXPath("//comment()[. = '"+pattern+"'][1]");
			//OMNamespace ns = template.findNamespace(nss, null);
			path.addNamespace("bru1", nss);
			OMComment n = (OMComment) path.selectSingleNode(template);
			if(n!=null) return n;
			logger.warn("Comment '"+pattern+"' was not found in the XML template.");
			return null;
		}
	
	@SuppressWarnings("static-access")
	private static Options getOptions() {
		Option repository = OptionBuilder.withArgName( "repository" )
											.hasArg()
											.withLongOpt("repository")
											.withDescription(  "Path or URL to the SVN repository." )
											.create( PARAM_REPOS );
		repository.setRequired(true);
		
		Option txn = OptionBuilder.withArgName( "transactionid" )
											.hasArg()
											.withLongOpt("transaction")
											.withDescription(  "The SVN transaction id to examine (TXN). You cannot combine txn with -rev. "
													+ "When a txn is given, the repository path must be a local path.")
											.create( PARAM_TXN );
		Option rev = OptionBuilder.withArgName( "revision" )
				.hasArg()
				.withDescription(  "A revision to examine. You cannot combine revision with -txn." )
				.create( PARAM_REV );
		Option config = OptionBuilder.withArgName( "config_file" )
				.hasArg()
				.withLongOpt("config")
				.withDescription(  "The configuration file to use. Defaults to 'emitter.properties'.")
				.create( PARAM_CONFIG );
		
		Options options = new Options();
		options.addOption(repository);
		options.addOption(txn);
		options.addOption(rev);
		options.addOption(config);
		return options;
	}
	
	private static void printHelp() {
		// automatically generate the help statement
		HelpFormatter formatter = new HelpFormatter();
		String header = "\nSVN-ALFEventEmitter " + VERSION +", a SVN hook implemented in Java to emit Eclipse ALFEvents on commit.\n\n";
		String footer = "Please send bug reports to bru@brutex.de.\n(c)2013 Brian Rosenberger";
		formatter.printHelp("java -jar SVN-ALFEventEmitter", header, getOptions(), footer, true);
	}
	
	
	
	private enum PropertyType {
		STRING(), STRINGARRAY(), BOOLEAN();
	}
	
	
}