package org.argeo.connect.e4.resources.parts;
   
   import static org.argeo.connect.resources.ResourcesNames.RESOURCES_TAGGABLE_PROP_NAME;
   
   import java.util.List;
   
   import javax.jcr.Node;
   import javax.jcr.Session;
   
  import org.argeo.connect.resources.ResourcesNames;
  import org.argeo.connect.resources.ResourcesService;
  import org.argeo.connect.resources.core.TagUtils;
  import org.argeo.connect.ui.AppWorkbenchService;
  import org.argeo.connect.ui.ConnectWorkbenchUtils;
  import org.argeo.connect.util.ConnectJcrUtils;
  import org.argeo.eclipse.ui.EclipseUiUtils;
  import org.eclipse.jface.viewers.ColumnLabelProvider;
  
  /**
   * A label provider to display clickable tag-like resources like in
   * markup-enabled viewers
   */
  public class OtherTagsLabelProvider extends ColumnLabelProvider {
  	private static final long serialVersionUID = -3486673830618518227L;
  
  	// private final String tagTypeId;
  	// Context
  	private final Session session;
  	private final ResourcesService resourcesService;
  	private final AppWorkbenchService appWorkbenchService;
  	private String tagId;
  
  	private final String taggablePropName;
  	private final String currentTag;
  	private Node tagLikeResPar;
  	private String selectorName;
  
  	// enhance labels
  	private String labelPrefix = "#";
  
  	public OtherTagsLabelProvider(ResourcesService resourcesService, AppWorkbenchService appWorkbenchService,
  			Session session, String tagId, String currentTag) {
  		this.resourcesService = resourcesService;
  		this.appWorkbenchService = appWorkbenchService;
  		this.session = session;
  		this.tagId = tagId;
  		this.currentTag = currentTag;
  		tagLikeResPar = resourcesService.getTagLikeResourceParent(session, tagId);
  		if (tagLikeResPar != null) {// workaround
  			taggablePropName = ConnectJcrUtils.getMultiAsString(tagLikeResPar, RESOURCES_TAGGABLE_PROP_NAME, ",");
  		} else {
  			taggablePropName = null;
  		}
  	}
  
  	public OtherTagsLabelProvider(ResourcesService resourcesService, AppWorkbenchService appWorkbenchService,
  			Node tagInstance, String selectorName) {
  		this.session = ConnectJcrUtils.getSession(tagInstance);
  		this.resourcesService = resourcesService;
  		this.appWorkbenchService = appWorkbenchService;
  		this.selectorName = selectorName;
  		tagLikeResPar = TagUtils.retrieveTagParentFromTag(tagInstance);
  		tagId = ConnectJcrUtils.get(tagLikeResPar, ResourcesNames.RESOURCES_TAG_ID);
  		taggablePropName = ConnectJcrUtils.getMultiAsString(tagLikeResPar, RESOURCES_TAGGABLE_PROP_NAME, ",");
  		currentTag = TagUtils.retrieveTagId(tagInstance);
  	}
  
  	public void setLabelPrefix(String labelPrefix) {
  		this.labelPrefix = labelPrefix;
  	}
  
  	@Override
  	public String getText(Object element) {
  		// if(true)
  		// return "";
  		// try {
  		Node currNode = ConnectJcrUtils.getNodeFromElement(element, selectorName);
  		// TODO also handle encoded tag case.
  		StringBuilder builder = new StringBuilder();
  		List<String> currTags = ConnectJcrUtils.getMultiAsList(currNode, taggablePropName);
  		loop: for (String tag : currTags) {
  			if (EclipseUiUtils.notEmpty(currentTag) && tag.equals(currentTag))
  				continue loop;
  			// TODO rather display links to open corresponding tag editor
  			// String value = ConnectWorkbenchUtils.getTagLink(session, resourcesService,
  			// appWorkbenchService, tagId, tag);
  			builder.append(labelPrefix).append(tag).append(" ");
  		}
  
  		if (builder.length() > 2)
  			return builder.toString();
  		else
  			return "";
  		// } catch (RepositoryException re) {
  		// throw new ActivitiesException("Unable to get date from node " +
  		// element, re);
  		// }
  	}
  }