/**
    * Copyright 2004-2012 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.hr.time.timesheet.web;
  
  import java.sql.Date;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.log4j.Logger;
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionForward;
  import org.apache.struts.action.ActionMapping;
  import org.apache.struts.action.ActionRedirect;
  import org.kuali.hr.time.base.web.TkAction;
  import org.kuali.hr.time.calendar.CalendarEntries;
  import org.kuali.hr.time.detail.web.ActionFormUtils;
  import org.kuali.hr.time.roles.TkUserRoles;
  import org.kuali.hr.time.roles.UserRoles;
  import org.kuali.hr.time.service.base.TkServiceLocator;
  import org.kuali.hr.time.timesheet.TimesheetDocument;
  import org.kuali.hr.time.util.TKContext;
  import org.kuali.hr.time.util.TKUser;
  import org.kuali.hr.time.util.TKUtils;
  import org.kuali.hr.time.util.TkConstants;
  import org.kuali.hr.time.workflow.TimesheetDocumentHeader;
  import org.kuali.rice.kim.api.services.KimApiServiceLocator;
  import org.kuali.rice.krad.exception.AuthorizationException;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  public class TimesheetAction extends TkAction {
  
  	private static final Logger LOG = Logger.getLogger(TimesheetAction.class);
  
      @Override
      protected void checkTKAuthorization(ActionForm form, String methodToCall) throws AuthorizationException {
          TKUser user = TKContext.getUser();
          UserRoles roles = TkUserRoles.getUserRoles(GlobalVariables.getUserSession().getPrincipalId());
          TimesheetDocument doc = TKContext.getCurrentTimesheetDocument();
  
          if (!roles.isDocumentReadable(doc)) {
              throw new AuthorizationException(GlobalVariables.getUserSession().getPrincipalId(), "TimesheetAction: docid: " + doc.getDocumentId(), "");
          }
      }
  
      @Override
  	public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
  		TimesheetActionForm taForm = (TimesheetActionForm)form;
  		TKUser user = TKContext.getUser();
  		String documentId = taForm.getDocumentId();
  
          LOG.debug("DOCID: " + documentId);
  
          // Here - viewPrincipal will be the principal of the user we intend to
          // view, be it target user, backdoor or otherwise.
          String viewPrincipal = TKUser.getCurrentTargetPerson().getPrincipalId();
  		CalendarEntries payCalendarEntries;
  		TimesheetDocument td;
  		TimesheetDocumentHeader tsdh;
  
          // By handling the prev/next in the execute method, we are saving one
          // fetch/construction of a TimesheetDocument. If it were broken out into
          // methods, we would first fetch the current document, and then fetch
          // the next one instead of doing it in the single action.
          if (StringUtils.isNotBlank(documentId)) {
              td = TkServiceLocator.getTimesheetService().getTimesheetDocument(documentId);
          } else {
              // Default to whatever is active for "today".
              Date currentDate = TKUtils.getTimelessDate(null);
              payCalendarEntries = TkServiceLocator.getCalendarService().getCurrentCalendarDates(viewPrincipal,  currentDate);
              if(payCalendarEntries == null){
                  throw new RuntimeException("No pay calendar entry for " + viewPrincipal);
              }
              td = TkServiceLocator.getTimesheetService().openTimesheetDocument(viewPrincipal, payCalendarEntries);
          }
  
          // Set the TKContext for the current timesheet document id.
          if (td != null) {
             setupDocumentOnFormContext(taForm, td);
          } else {
              LOG.error("Null timesheet document in TimesheetAction.");
          }
  
          // Do this at the end, so we load the document first,
          // then check security permissions via the superclass execution chain.
 		return super.execute(mapping, form, request, response);
 	}
 
     public ActionForward docHandler(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
         if (StringUtils.equals(request.getParameter("command"), "displayDocSearchView")
         		|| StringUtils.equals(request.getParameter("command"), "displayActionListView") ) {
         	final String docId = (String)request.getParameter("docId");
         	TimesheetDocument td = TkServiceLocator.getTimesheetService().getTimesheetDocument(docId);
         	final String principalName = KimApiServiceLocator.getPersonService().getPerson(td.getPrincipalId()).getPrincipalName();
         	
         	return new ActionRedirect("/changeTargetPerson.do?methodToCall=changeTargetPerson&documentId" + docId + "&principalName=" + principalName + "&targetUrl=TimeDetail.do%3FdocmentId=" + docId + "&returnUrl=TimeApproval.do");
         }
     	
     	return mapping.findForward("basic");
     }
 
     protected void setupDocumentOnFormContext(TimesheetActionForm taForm, TimesheetDocument td){
     	String viewPrincipal = TKUser.getCurrentTargetPerson().getPrincipalId();
     	TKContext.setCurrentTimesheetDocumentId(td.getDocumentId());
         TKContext.setCurrentTimesheetDocument(td);
 	    taForm.setTimesheetDocument(td);
 	    taForm.setDocumentId(td.getDocumentId());
         TimesheetDocumentHeader prevTdh = TkServiceLocator.getTimesheetDocumentHeaderService().getPrevOrNextDocumentHeader(TkConstants.PREV_TIMESHEET, viewPrincipal);
         TimesheetDocumentHeader nextTdh = TkServiceLocator.getTimesheetDocumentHeaderService().getPrevOrNextDocumentHeader(TkConstants.NEXT_TIMESHEET, viewPrincipal);
         if( prevTdh != null ) {
             taForm.setPrevDocumentId(prevTdh.getDocumentId());
         }
         if( nextTdh != null) {
             taForm.setNextDocumentId(nextTdh.getDocumentId());
         }
         taForm.setPayCalendarDates(td.getPayCalendarEntry());
         taForm.setOnCurrentPeriod(ActionFormUtils.getOnCurrentPeriodFlag(taForm.getPayCalendarDates()));
     }
 
 }