/*
 * NOTE: This copyright does *not* cover user programs that use HQ
 * program services by normal system calls through the application
 * program interfaces provided as part of the Hyperic Plug-in Development
 * Kit or the Hyperic Client Development Kit - this is merely considered
 * normal use of the program, and does *not* fall under the heading of
 * "derived work".
 * 
 * Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
 * This file is part of HQ.
 * 
 * HQ is free software; you can redistribute it and/or modify
 * it under the terms version 2 of the GNU General Public License as
 * published by the Free Software Foundation. This program is distributed
 * in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

package org.hyperic.hq.ui.action.resource.common.inventory;

import java.util.ArrayList;

import javax.annotation.Resource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tiles.AttributeContext;
import org.apache.tiles.context.TilesRequestContext;
import org.apache.tiles.preparer.ViewPreparer;
import org.hyperic.hq.appdef.shared.AppdefEntityID;
import org.hyperic.hq.appdef.shared.AppdefGroupValue;
import org.hyperic.hq.appdef.shared.AppdefResourceValue;
import org.hyperic.hq.authz.shared.ResourceManager;
import org.hyperic.hq.bizapp.shared.AppdefBoss;
import org.hyperic.hq.ui.Constants;
import org.hyperic.hq.ui.action.BaseActionNG;
import org.hyperic.hq.ui.util.RequestUtils;
import org.hyperic.hq.ui.util.SessionUtils;
import org.hyperic.util.pager.PageControl;
import org.hyperic.util.pager.PageList;
import org.springframework.stereotype.Component;

@Component("addResourceGroupsFormPrepareActionNG")
public class AddResourceGroupsFormPrepareActionNG extends BaseActionNG
		implements ViewPreparer {

    private final Log log = LogFactory.getLog(AddResourceGroupsFormPrepareActionNG.class);

    @Resource
    private AppdefBoss appdefBoss;
    @Resource
    private ResourceManager resourceManager;
	
	public void execute(TilesRequestContext tilesContext,
			AttributeContext attributeContext) {
		try{
			this.request = getServletRequest();
			AppdefEntityID entityId = RequestUtils.getEntityId(request);
			if (entityId != null ) {
				this.setValueInSession("resourceParentGroupsEid",entityId.toString());
			}
	        AppdefResourceValue resource = RequestUtils.getResource(request);
	        if (resource == null) {
	            addActionError( Constants.ERR_RESOURCE_NOT_FOUND );
	            return;
	        }
	
	        // addForm.setRid(resource.getId());
	        // addForm.setType(new Integer(entityId.getType()));
	
	        Integer sessionId = RequestUtils.getSessionId(request);
	        PageControl pca = RequestUtils.getPageControl(request, "psa", "pna", "soa", "sca");
	        PageControl pcp = RequestUtils.getPageControl(request, "psp", "pnp", "sop", "scp");
	
	        // pending groups are those on the right side of the "add
	        // to list" widget- awaiting association with the resource
	        // when the form's "ok" button is clicked.
	        boolean groupsArePending = (SessionUtils.getList(request.getSession(), Constants.PENDING_RESGRPS_SES_ATTR)).length > 0;
	
	        // available groups are all groups in the system that are
	        // _not_ associated with the resource and are not pending
	        // since the bizapp will return all groups, we'll filter out the
	        // the ones that are pending from the "available" list and set
	        // _that_ as a request attribute
	        log.trace("getting available groups for resource [" + entityId + "]");
	        Integer[] pendingGroupIds = SessionUtils.getList(request.getSession(), Constants.PENDING_RESGRPS_SES_ATTR);
	
	        org.hyperic.hq.authz.server.session.Resource r = resourceManager.findResource(resource.getEntityId());
	        PageList<AppdefGroupValue> availableGroups = appdefBoss.findAllGroupsMemberExclusive(sessionId.intValue(), pca,
	            entityId, pendingGroupIds, r.getPrototype());
	
	        if (log.isTraceEnabled())
	            log.trace("findAllGroups(...) returned these " + "AppdefGroupValues " + availableGroups);
	
	        if (groupsArePending) {
	            log.trace("getting pending groups for resource [" + entityId + "]");
	            PageList<AppdefGroupValue> pendingGroups = appdefBoss
	                .findGroups(sessionId.intValue(), pendingGroupIds, pcp);
	            request.setAttribute(Constants.PENDING_RESGRPS_ATTR, pendingGroups);
	            request.setAttribute(Constants.NUM_PENDING_RESGRPS_ATTR, new Integer(pendingGroups.getTotalSize()));
	
	            // end filtering
	        } else {
	            // nothing is pending, so we'll initialize the attributes
	            request.setAttribute(Constants.PENDING_RESGRPS_ATTR, new ArrayList<AppdefGroupValue>());
	            request.setAttribute(Constants.NUM_PENDING_RESGRPS_ATTR, new Integer(0));
	        }
	
	        request.setAttribute(Constants.AVAIL_RESGRPS_ATTR, availableGroups);
	        request.setAttribute(Constants.NUM_AVAIL_RESGRPS_ATTR, new Integer(availableGroups.getTotalSize()));
		} catch (Exception e) {
			log.error(e);
		}
	}

}