/*
 * © Copyright IBM Corp. 2013
 * 
 * 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.ibm.sbt.services.client.connections.wikis;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.w3c.dom.Node;

import com.ibm.commons.util.StringUtil;
import com.ibm.commons.xml.NamespaceContext;
import com.ibm.commons.xml.xpath.XPathExpression;
import com.ibm.sbt.services.client.base.BaseService;
import com.ibm.sbt.services.client.base.datahandlers.XmlDataHandler;
import com.ibm.sbt.services.client.connections.common.Member;

/**
 * Wiki class represents an entry for a Wiki returned by the
 * Connections REST API.
 * 
 * @author Mario Duarte
 *
 */
public class Wiki extends WikiBaseEntity {

	/**
	 * 
	 * @param service
	 * @param node
	 * @param namespaceCtx
	 * @param xpathExpression
	 */
	public Wiki(BaseService service, Node node, NamespaceContext namespaceCtx, 
			XPathExpression xpathExpression) {
		super(service, node, namespaceCtx, xpathExpression);
	}
	
	public Wiki(){}
	
	/**
	 * 
	 * @param service
	 * @param dataHandler
	 */
	public Wiki(BaseService service, XmlDataHandler dataHandler) {
		super(service, dataHandler);
	}
	
	/**
	 * Create empty wiki with no DataHandler
	 * @param service
	 */
	public Wiki(BaseService service) {
		super(service, (XmlDataHandler)null);
	}
	
	
	/**
	 * Return the community's unique ID if this wiki belongs to a community.
	 * @return communityUuid
	 */
	public String getCommunityUuid() {
		return getAsString(WikiXPath.communityUuid);
	}
	
	/**
	 * 
	 * @return boolean indicating whether or not this wiki is a community wiki.
	 */
	public boolean isCommunityWiki() {
		return getCommunityUuid() != null;
	}
	
	/**
	 * Set of permissions available for the wiki.
	 * @return {Set<String>}
	 */
	@SuppressWarnings("unchecked")
	public Set<String> getPermissions() {
		if (fields.containsKey(WikiXPath.permissions.getName())) {
			return (Set<String>)fields.get(WikiXPath.permissions.getName());
		}
		
		if (dataHandler != null) {
			Set<String> permissions = null;
			String permissionsStr = getAsString(WikiXPath.permissions);
			if(!StringUtil.isEmpty(permissionsStr)) {
				permissions = new HashSet<String>();
				for(String p : permissionsStr.split(",")) {
					permissions.add(p.trim());
				}
			}
			return permissions;
		}
		else {
			throw new NullPointerException(StringUtil.format("Field {0} was not found or had no value", 
					WikiXPath.permissions.getName()));
		}
	}
	
	/**
	 * Set the permissions available for the Wiki
	 * @param permissions
	 */
	public void setPermissions(Set<String> permissions) {
		setAsSet(WikiXPath.permissions, permissions);
	}
	
	/**
	 * List of users who can access the wiki. 
	 * @return {List<Member>}
	 */
	public List<Member> getSharedWith() {
		throw new UnsupportedOperationException(); //FIXME: Needs to be implemented
	}
	
	/**
	 * Specify who can access the wiki. 
	 * @param members
	 */
	public void setSharedWith(List<Member> members) {
		throw new UnsupportedOperationException(); //FIXME: Needs to be implemented
	}

	/**
	 * Returns the tags on the wiki page.
	 * 
	 * @return {List<String>}
	 */
	public List<String> getTags() {
		return super.getBaseTags();
	}

	/**
	 * Set the tags on the wiki page.
	 * 
	 * @param tags
	 */
	public void setTags(List<String> tags) {
		super.setBaseTags(tags);
	}

}