/**
    * This file Copyright (c) 2010-2014 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.templating.jsp.cmsfn;
  
  import info.magnolia.cms.util.SiblingsHelper;
  import info.magnolia.jcr.util.ContentMap;
  import info.magnolia.objectfactory.Components;
  import info.magnolia.rendering.template.configured.ConfiguredInheritance;
  import info.magnolia.templating.functions.TemplatingFunctions;
  
  import java.util.Collection;
  import java.util.List;
  
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang3.StringUtils;
  import org.tldgen.annotations.Function;
  
  /**
   * Static wrapper of the Templating function class.
   * This wrapper gives us the ability to expose these functions as Tags in the JSP's.
   */
  public class JspTemplatingFunction {
  
      private static TemplatingFunctions templatingFunctions;
  
      /**
       * Convenience method.
       * Currently, TemplatingFunction (singleton) is accessed once, but in case of we need to change
       * this and to access it each time, this could be done here (discussed with Greg and Philipp).
       * Initial Impl:
       * private static TemplatingFunctions templatingFunctions = Components.getComponent(TemplatingFunctions.class);
       */
      private static TemplatingFunctions getTemplatingFunctions() {
          if (templatingFunctions == null) {
              templatingFunctions = Components.getComponent(TemplatingFunctions.class);
          }
          return templatingFunctions;
      }
  
      @Function
      public static Node asJCRNode(ContentMap contentMap) {
          return getTemplatingFunctions().asJCRNode(contentMap);
      }
  
      @Function
      public static ContentMap asContentMap(Node content) {
          return getTemplatingFunctions().asContentMap(content);
      }
  
      @Function
      public static List<ContentMap> children(ContentMap content, String nodeTypeName) throws RepositoryException {
          if (!nodeTypeName.isEmpty()) {
              return getTemplatingFunctions().children(content, nodeTypeName);
          }
          return getTemplatingFunctions().children(content);
      }
  
      @Function()
      public static ContentMap root(ContentMap contentMap, String nodeTypeName) throws RepositoryException {
          if (!nodeTypeName.isEmpty()) {
              ContentMap root = getTemplatingFunctions().root(contentMap, nodeTypeName);
              return root;
          }
          return getTemplatingFunctions().root(contentMap);
      }
 
     @Function
     public static ContentMap parent(ContentMap contentMap, String nodeTypeName) throws RepositoryException {
         if (!nodeTypeName.isEmpty()) {
             return getTemplatingFunctions().parent(contentMap, nodeTypeName);
         }
         return getTemplatingFunctions().parent(contentMap);
     }
 
     /**
      * Returns the page's {@link ContentMap} of the passed {@link ContentMap}. If the passed {@link ContentMap} represents a page, the passed {@link ContentMap} will be returned.
      * If the passed {@link ContentMap} has no parent page at all, null is returned.
      * 
      * @param content the {@link ContentMap} to get the page's {@link ContentMap} from.
      * @return returns the page {@link ContentMap} of the passed content {@link ContentMap}.
      */
     @Function
     public static ContentMap page(ContentMap content) throws RepositoryException {
         return getTemplatingFunctions().page(content);
     }
 
     @Function
     public static List<ContentMap> ancestors(ContentMap contentMap, String nodeTypeName) throws RepositoryException {
         if (nodeTypeName.isEmpty()) {
             return getTemplatingFunctions().ancestors(contentMap);
         }
         return getTemplatingFunctions().ancestors(contentMap, nodeTypeName);
     }
 
     @Function
     public static ContentMap inherit(ContentMap content, String relPath) throws RepositoryException {
         return JspTemplatingFunction.inherit(content, relPath, null, ConfiguredInheritance.COMPONENTS_FILTERED, ConfiguredInheritance.PROPERTIES_ALL);
     }
 
     @Function
     public static ContentMap inherit(ContentMap content, String relPath, String nodeTypes, String nodeInheritance, String propertyInheritance) throws RepositoryException {
         return getTemplatingFunctions().inherit(content, relPath, nodeTypes, nodeInheritance, propertyInheritance);
     }
 
     @Function
     public static Property inheritProperty(ContentMap content, String relPath) throws RepositoryException {
         return getTemplatingFunctions().inheritProperty(content, relPath);
     }
 
     @Function
     public static List<ContentMap> inheritList(ContentMap content, String relPath) throws RepositoryException {
         return getTemplatingFunctions().inheritList(content, relPath);
     }
 
     @Function
     public static boolean isInherited(ContentMap content) {
         return getTemplatingFunctions().isInherited(content);
     }
 
     @Function
     public static boolean isFromCurrentPage(ContentMap content) {
         return getTemplatingFunctions().isFromCurrentPage(content);
     }
 
     /**
      * Create link for the Node identified by nodeIdentifier in the specified workspace.
      */
     @Function
     public static String linkForWorkspace(String workspace, String nodeIdentifier) {
         return getTemplatingFunctions().link(workspace, nodeIdentifier);
     }
 
     /**
      * FIXME Add a LinkUtil.createLink(Property property).... Dirty Hack.
      * FIXME: Should be changed when a decision is made on SCRUM-525.
      */
     @Function
     public static String linkForProperty(Property property) {
         return getTemplatingFunctions().link(property);
     }
 
     @Function
     public static String link(ContentMap contentMap) throws RepositoryException {
         return getTemplatingFunctions().link(contentMap);
     }
 
     @Function
     public static String link(ContentMap contentMap, String propertyName) throws RepositoryException {
         return getTemplatingFunctions().link(contentMap);
     }
 
     /**
      * Get the language used currently.
      * 
      * @return The language as a String.
      */
     @Function
     public static String language() {
         return getTemplatingFunctions().language();
     }
 
     /**
      * Returns an external link prepended with <code>http://</code> in case the protocol is missing or an empty String
      * if the link does not exist.
      * 
      * @param content The node's map representation where the link property is stored on.
      * @param linkPropertyName The property where the link value is stored in.
      * @return The link prepended with <code>http://</code>;
      */
     @Function
     public static String externalLink(ContentMap content, String linkPropertyName) {
         return getTemplatingFunctions().externalLink(content, linkPropertyName);
     }
 
     /**
      * Return a link title based on the @param linkTitlePropertyName. When property @param linkTitlePropertyName is
      * empty or null, the link itself is provided as the linkTitle (prepended with <code>http://</code>).
      * 
      * @param content The node where the link property is stored on.
      * @param linkPropertyName The property where the link value is stored in.
      * @param linkTitlePropertyName The property where the link title value is stored
      * @return the resolved link title value
      */
     @Function
     public static String externalLinkTitle(ContentMap content, String linkPropertyName, String linkTitlePropertyName) {
         return getTemplatingFunctions().externalLinkTitle(content, linkPropertyName, linkTitlePropertyName);
     }
 
     @Function
     public static boolean isEditMode() {
         return getTemplatingFunctions().isEditMode();
     }
 
     @Function
     public static boolean isPreviewMode() {
         return getTemplatingFunctions().isPreviewMode();
     }
 
     @Function
     public static boolean isAuthorInstance() {
         return getTemplatingFunctions().isAuthorInstance();
     }
 
     @Function
     public static boolean isPublicInstance() {
         return getTemplatingFunctions().isPublicInstance();
     }
 
     /**
      * Util method to create html attributes <code>name="value"</code>. If the value is empty an empty string will be returned.
      * This is mainly helpful to avoid empty attributes.
      */
     @Function
     public static String createHtmlAttribute(String name, String value) {
         return getTemplatingFunctions().createHtmlAttribute(name, value);
     }
 
     /**
      * Returns an instance of SiblingsHelper for the given contentMap.
      */
     @Function
     public static SiblingsHelper siblings(ContentMap node) throws RepositoryException {
         return getTemplatingFunctions().siblings(node);
     }
 
     /**
      * Return the Node for the Given Path
      * from the given repository.
      * If the repository is empty, take the default (website).
      */
     @Function
     public static Node content(String path, String repository) {
         if (StringUtils.isBlank(repository)) {
             return getTemplatingFunctions().content(path);
         }
         return getTemplatingFunctions().content(repository, path);
     }
 
     /**
      * Return the Node for the given identifier
      * from the given repository.
      * If the repository is empty, take the default (website).
      */
     @Function
     public static Node contentByIdentifier(String id, String repository) {
         if (StringUtils.isBlank(repository)) {
             return getTemplatingFunctions().contentByIdentifier(id);
         }
         return getTemplatingFunctions().contentByIdentifier(repository, id);
     }
 
     @Function
     public static List<ContentMap> asContentMapList(Collection<Node> nodeList) {
         return getTemplatingFunctions().asContentMapList(nodeList);
     }
 
     @Function
     public static List<Node> asNodeList(Collection<ContentMap> contentMapList) {
         return getTemplatingFunctions().asNodeList(contentMapList);
     }
 
     /**
      * Removes escaping of HTML on properties.
      */
     @Function
     public static ContentMap decode(ContentMap content) {
         return getTemplatingFunctions().decode(content);
     }
 
     /**
      * Returns the string representation of a property from the metaData of the node or <code>null</code> if the node has no Magnolia metaData or if no matching property is found.
      */
     @Function
     public static String metaData(ContentMap content, String property) {
         return getTemplatingFunctions().metaData(content, property);
     }
 
     @Function
     public static Collection<Node> search(String workspace, String statement, String language, String returnItemType) {
         return getTemplatingFunctions().search(workspace, statement, language, returnItemType);
     }
 
     @Function
     public static Collection<Node> simpleSearch(String workspace, String statement, String returnItemType, String startPath) {
         return getTemplatingFunctions().simpleSearch(workspace, statement, returnItemType, startPath);
     }
 }