/*
    * Copyright 2004-2006 the Seasar Foundation and the Others.
    *
    * 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 org.seasar.tuigwaa.plugin;
  
  import java.util.ArrayList;
  import java.util.Enumeration;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  import javax.servlet.http.HttpServletRequest;
  
  import org.seasar.tuigwaa.cms.core.CmsConstants;
  import org.seasar.tuigwaa.cms.core.CmsRequest;
  import org.seasar.tuigwaa.model.common.EntityUtils;
  import org.seasar.tuigwaa.model.core.TgwEntity;
  import org.seasar.tuigwaa.system.Constants;
  import org.seasar.tuigwaa.util.TgwContext;
  
  import com.isenshi.util.CharUtil;
  
  public class TgwPluginUtils {
  
  	private static final String PREFIX_ENTITYNAME = "tgw_plugin_";
  	
  	private static final String PREFIX_ENTITY = "com.isenshi.tuigwaa.view.wiki.plugin/";
  
  	// bind
  
  	public static void bindEntityMapToCmsRequest(Map entityMap) {
  		for (Iterator i = entityMap.keySet().iterator(); i.hasNext();) {
  			TgwEntity entity = (TgwEntity) i.next();
  			String id = (String) entityMap.get(entity);
  			bindEntityId(entity.getName(), id);
  		}
  	}
  
  	public static void bindEntityId(TgwEntity entity, Long id) {
  		bindEntityId(entity.getName(), String.valueOf(id));
  	}
  
  	public static void bindEntityObject(String domainName, String entityName,
  			Object bean) {
  		bindEntityObject(TgwContext.getCmsRequest(), domainName, entityName,
  				bean);
  	}
  
  	public static void bindEntityObject(TgwEntity entity, Object bean) {
  		bindEntityObject(TgwContext.getCmsRequest(), entity, bean);
  	}
  
  	public static void bindEntityObject(CmsRequest req, TgwEntity entity,
  			Object bean) {
  		bindEntityObject(req, entity.getDomainName(), entity.getName(), bean);
  	}
  
  	public static void bindKeyword(String keyword) {
  		if (keyword == null) {
  			return;
  		}
  		List list = new ArrayList();
  		String[] keywords = keyword.split(" "); // Need Japanese Character Space
  		for (int i = 0; keywords != null && i < keywords.length; i++) {
  			if (keywords[i] != null && !keywords[i].equals("")) {
  				list.add(keywords[i]);
  			}
  		}
  		TgwContext.setCmsAttribute(CmsConstants.PARAM_KEYWORD, list);
  	}
  
  	// get
  
  	public static Object getEntityObject(CmsRequest req, TgwEntity entity) {
  		return getEntityObject(req, entity.getDomainName(), entity.getName());
  	}
  
  	public static void removeEntityObject(String domainName, String entityName) {
  		removeEntityObject(TgwContext.getCmsRequest(), domainName, entityName);
  	}
  
  	public static void removeEntityObject(CmsRequest req, String domainName,
  			String entityName) {
  		req.removeParameter(createEntityBindingName(entityName));
  		req.removeAttribute(PREFIX_ENTITY + domainName + "." + entityName);
  	}
 
 	public static Map getEntityNameMapFromRequest(HttpServletRequest req) {
 		Map map = new HashMap();
 		Enumeration enm = req.getParameterNames();
 		while (enm.hasMoreElements()) {
 			String key = (String) enm.nextElement();
 			String entityName = CharUtil.removePrefixAndSuffix(key,
 					Constants.PARAM_PREFIX_ENTITY,
 					Constants.PARAM_SUFFIX_ENTITY);
 			if (entityName != null) {
 				map.put(entityName, req.getParameter(key));
 			}
 		}
 		return map;
 	}
 
 	public static Long getEntityId(TgwEntity entity) {
 		return getEntityId(TgwContext.getCmsRequest(), entity);
 	}
 
 	public static Long getEntityId(CmsRequest req, TgwEntity entity) {
 		return getEntityId(req, entity.getName());
 	}
 
 	// create
 
 	public static String createEscapeEntityBindingName(String entityName,
 			String attrName) {
 		return Constants.PARAM_PREFIX_ENTITY_ESCAPE + entityName
 				+ Constants.PARAM_PREFIX_ATTR_ESCAPE + attrName;
 	}
 
 	public static String createEntityBindingName(String entityName) {
 		return Constants.PARAM_PREFIX_ENTITY + entityName
 				+ Constants.PARAM_SUFFIX_ENTITY;
 	}
 
 	// [Start] ----- Private Method ------
 
 	private static Long getEntityId(CmsRequest req, String entityName) {
 		String bindingName = createEntityBindingName(entityName);
 		String id = req.getParameter(bindingName);
 		if (id == null) {// || id.equals("null")) {
 			return null;
 		}
 		return Long.valueOf(id);
 	}
 
 	private static void bindEntityId(String entityName, String id) {
 		String bindingName = createEntityBindingName(entityName);
 		TgwContext.setCmsParameter(bindingName, id);
 	}
 
 	private static Object getEntityObject(CmsRequest req, String domainName,
 			String entityName) {
 		return req.getAttribute(PREFIX_ENTITY + domainName + "." + entityName);
 	}
 
 	private static void bindEntityObject(CmsRequest req, String domainName,
 			String entityName, Object bean) {
 		if (getEntityId(req, entityName) == null) {
 			bindEntityId(entityName, String.valueOf(EntityUtils.getId(bean)));
 		}
 		req.setAttributes(PREFIX_ENTITY + domainName + "." + entityName, bean);
 	}
 
 	public static String getDetailPageName(CmsRequest request, TgwEntity entity) {
 		String parentpath = request.getPage().getResource().getParentPath();
 		String pageName = entity.getDisplayName()
 				+ PluginUtils.getMessage("link.label.detail");
 		if (parentpath == null || parentpath.equals("")) {
 			return pageName;
 		} else {
 			return parentpath + "/" + pageName;
 		}
 	}
 
 	public static String toPluginEntityName(Class clazz) {
 		return PREFIX_ENTITYNAME + EntityUtils.toEntityName(clazz);
 	}
 	
 	public static boolean isPluginEntity(String entityName){
 		return entityName.startsWith(PREFIX_ENTITYNAME);
 	}
 }