/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright 2008 - 2009 Pentaho Corporation.  All rights reserved.
*/
package org.pentaho.pac.server.config;

import java.io.File;
import java.io.IOException;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.pentaho.pac.common.config.IPdiConfig;
import org.pentaho.pac.server.common.util.DtdEntityResolver;
import org.pentaho.platform.api.util.XmlParseException;
import org.pentaho.platform.engine.security.userroledao.messages.Messages;
import org.pentaho.platform.util.xml.dom4j.XmlDom4JHelper;

public class PdiConfigXml implements IPdiConfig {

  private static final String ROOT_ELEMENT = "kettle-repository";  //$NON-NLS-1$
  private static final String REPOSITORY_FILE_XPATH = ROOT_ELEMENT +"/repositories.xml.file";  //$NON-NLS-1$
  private static final String REPOSITORY_TYPE_XPATH = ROOT_ELEMENT +"/repository.type";  //$NON-NLS-1$
  private static final String REPOSITORY_NAME_XPATH = ROOT_ELEMENT +"/repository.name";  //$NON-NLS-1$
  private static final String REPOSITORY_USER_XPATH = ROOT_ELEMENT +"/repository.userid";  //$NON-NLS-1$
  private static final String REPOSITORY_PWD_XPATH = ROOT_ELEMENT +"/repository.password";  //$NON-NLS-1$
  
  Document document;
  
  public PdiConfigXml(File pentahoXmlFile) throws IOException, DocumentException{
    this(XmlDom4JHelper.getDocFromFile(pentahoXmlFile, new DtdEntityResolver()));    
  }
  
  public PdiConfigXml(String xml) throws DocumentException, XmlParseException {
    this(XmlDom4JHelper.getDocFromString(xml, new DtdEntityResolver()));
  }
  
  public PdiConfigXml(Document doc) throws DocumentException {
    Element rootElement = doc.getRootElement();
    if ((rootElement != null) &&  !doc.getRootElement().getName().equals(ROOT_ELEMENT)) {
      throw new DocumentException(Messages.getInstance().getErrorString("GoogleMapsConfig.ERROR_0001_INVALID_ROOT_ELEMENT")); //$NON-NLS-1$
    }
    document = doc;
  }
  
  public PdiConfigXml(IPdiConfig pdiConfig) {
    this();
    setRepositoryName(pdiConfig.getRepositoryName());
    setRepositoryPassword(pdiConfig.getRepositoryPassword());
    setRepositoryType(pdiConfig.getRepositoryType());
    setRepositoryUserId(pdiConfig.getRepositoryUserId());
    setRepositoryXmlFile(pdiConfig.getRepositoryXmlFile());
  }
  
  public PdiConfigXml() {
    document = DocumentHelper.createDocument();
    document.addElement(ROOT_ELEMENT);
  }
  
  public String getRepositoryName() {
    return getValue(REPOSITORY_NAME_XPATH);
  }

  public String getRepositoryPassword() {
    return getValue(REPOSITORY_PWD_XPATH);
  }

  public String getRepositoryType() {
    return getValue(REPOSITORY_TYPE_XPATH);
  }

  public String getRepositoryUserId() {
    return getValue(REPOSITORY_USER_XPATH);
  }

  public String getRepositoryXmlFile() {
    return getValue(REPOSITORY_FILE_XPATH);
  }

  public void setRepositoryName(String name) {
    setValue(REPOSITORY_NAME_XPATH, name);
  }

  public void setRepositoryPassword(String password) {
    setValue(REPOSITORY_PWD_XPATH, password);
  }

  public void setRepositoryType(String type) {
    setValue(REPOSITORY_TYPE_XPATH, type);
  }

  public void setRepositoryUserId(String userId) {
    setValue(REPOSITORY_USER_XPATH, userId);
  }

  public void setRepositoryXmlFile(String xmlFile) {
    setValue(REPOSITORY_FILE_XPATH, xmlFile);
  }

  private void setValue(String xPath, String value) {
    Element element = (Element) document.selectSingleNode( xPath );
    if (element == null) {
      element = DocumentHelper.makeElement(document, xPath);
    }
    element.setText(value);
  }

  private String getValue(String xpath) {
    Element element = (Element)document.selectSingleNode(xpath);
    return element != null ? element.getText() : null;
  }
}