/*
    * Copyright 2012 Oracle Corporation. All Rights Reserved.
    *
    * 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 com.fatwire.gst.foundation.navigation.support;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.LinkedList;
  import java.util.List;
  
  import org.apache.commons.lang.StringEscapeUtils;
  import org.apache.commons.lang.StringUtils;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  import COM.FutureTense.Interfaces.ICS;
  import COM.FutureTense.Interfaces.Utilities;
  
  import com.fatwire.assetapi.data.AssetId;
  import com.fatwire.cs.core.db.PreparedStmt;
  import com.fatwire.cs.core.db.StatementParam;
  import com.fatwire.gst.foundation.facade.assetapi.asset.TemplateAsset;
  import com.fatwire.gst.foundation.facade.assetapi.asset.TemplateAssetAccess;
  import com.fatwire.gst.foundation.facade.runtag.render.LogDep;
  import com.fatwire.gst.foundation.facade.sql.IListIterable;
  import com.fatwire.gst.foundation.facade.sql.Row;
  import com.fatwire.gst.foundation.facade.sql.SqlHelper;
  import com.fatwire.gst.foundation.facade.uri.TemplateUriBuilder;
  import com.fatwire.gst.foundation.navigation.NavigationNode;
  import com.fatwire.gst.foundation.navigation.NavigationService;
  import com.fatwire.gst.foundation.wra.WraUriBuilder;
  
  /**
   * To retrieve the Navigation Bar data.
   * 
   * 
   * @author Dolf Dijkstra
   * @since August 31,2012
   */
  public class SimpleNavigationHelper extends AbstractNavigationService implements NavigationService {
  
      protected static final Log LOG = LogFactory.getLog(SimpleNavigationHelper.class);
  
      private static final String CHILD_SQL = "SELECT otype,oid,nrank,nid from SitePlanTree where nparentid=? and ncode='Placed' order by nrank";
      private static final PreparedStmt CHILD_STMT = new PreparedStmt(CHILD_SQL, Arrays.asList("SitePlanTree"));
  
      static {
  
          CHILD_STMT.setElement(0, "SitePlanTree", "nparentid");
  
      }
  
      /**
       * Constructor.
       * 
       * @param ics object
       */
      public SimpleNavigationHelper(final ICS ics) {
          super(ics);
  
      }
  
      /**
       * 
       * 
       * @param ics
       * @param assetTemplate
       */
      public SimpleNavigationHelper(final ICS ics, final TemplateAssetAccess assetTemplate) {
          super(ics, assetTemplate);
      }
  
      /**
       * @param ics
       * @param assetTemplate
       * @param linkLabelAttribute
       * @param pathAttribute
       */
      public SimpleNavigationHelper(final ICS ics, final TemplateAssetAccess assetTemplate,
              final String linkLabelAttribute, final String pathAttribute) {
          super(ics, assetTemplate, linkLabelAttribute, pathAttribute);
  
      }
  
      @Override
      protected NavigationNode getNode(final Row row, final int level, final int depth, final String linkAttribute) {
          final long nid = row.getLong("nid");
         final long pageId = row.getLong("oid");
 
         final AssetId pid = assetTemplate.createAssetId(row.getString("otype"), pageId);
         LogDep.logDep(ics, pid);
         final TemplateAsset asset = assetTemplate
                 .read(pid, "name", "subtype", "template", pathAttribute, linkAttribute);
 
         final NavigationNode node = new NavigationNode();
 
         final String p = ics.GetVar("p");
         if (StringUtils.isNotBlank(p)) {
             if (pid.getId() == Long.parseLong(p)) {
                 node.setActive(true);
             }
         }
 
         node.setPage(pid);
         node.setLevel(level);
         node.setPagesubtype(asset.getSubtype());
         node.setPagename(asset.asString("name"));
         node.setId(asset.getAssetId());
         final String url = getUrl(asset);
 
         if (url != null) {
             node.setUrl(url); // escape by default.
         }
 
         final String linktext = asset.asString(linkAttribute);
 
         if (linktext != null) {
             node.setLinktext(linktext);
         } else {
             node.setLinktext(asset.asString("name"));
         }
         if (depth < 0 || depth > level) {
             // get the children in the Site Plan, note recursing here
             final Collection<NavigationNode> children = getNodeChildren(nid, level + 1, depth, linkAttribute);
             for (final NavigationNode kid : children) {
                 if (kid != null && kid.getPage() != null) {
                     node.addChild(kid);
                 }
             }
         }
         return node;
     }
 
     @Override
     protected Collection<NavigationNode> getNodeChildren(final long nodeId, final int level, final int depth,
             final String linkAttribute) {
         final StatementParam param = CHILD_STMT.newParam();
         param.setLong(0, nodeId);
 
         final IListIterable root = SqlHelper.select(ics, CHILD_STMT, param);
         final List<NavigationNode> collection = new LinkedList<NavigationNode>();
         for (final Row row : root) {
             final NavigationNode node = getNode(row, level, depth, linkAttribute);
             if (node != null) {
                 collection.add(node);
             }
 
         }
         return collection;
     }
 
     /**
      * Builds up a URI for this asset, using the pathAttribute and the template
      * field of the asset
      * 
      * @param asset
      * @return the uri, xml escaped
      */
     protected String getUrl(final TemplateAsset asset) {
         final String template = asset.asString("template");
         final String path = asset.asString(pathAttribute);
         if (StringUtils.isBlank(template)) {
             LOG.debug("Asset " + asset.getAssetId() + " does not have a valid template set.");
             return null;
         }
         if (StringUtils.isBlank(path)) {
             LOG.debug("Asset " + asset.getAssetId()
                     + " does not have a valid path set. Defaulting to a non Vanity Url.");
             return new TemplateUriBuilder(asset.getAssetId(), template).toURI(ics);
         }
 
         String wrapper = ics.GetProperty("com.fatwire.gst.foundation.url.wrapathassembler.dispatcher",
                 "ServletRequest.properties", true);
         if (!Utilities.goodString(wrapper)) {
             wrapper = "GST/Dispatcher";
         }
         final String uri = new WraUriBuilder(asset.getAssetId()).wrapper(wrapper).template(template).toURI(ics);
         return StringEscapeUtils.escapeXml(uri);
     }
 
 }