/*
    * Copyright 2007-2009 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.rice.kew.actionrequest.bo;
  
  import org.kuali.rice.core.util.ConcreteKeyValue;
  import org.kuali.rice.core.util.KeyValue;
  import org.kuali.rice.kew.rule.RuleBaseValues;
  import org.kuali.rice.kew.rule.RuleTemplateOption;
  import org.kuali.rice.kew.rule.bo.RuleTemplate;
  import org.kuali.rice.kew.util.KEWConstants;
  import org.kuali.rice.kns.util.KNSGlobalVariables;
  import org.kuali.rice.kns.web.struts.form.KualiForm;
  import org.kuali.rice.kns.web.struts.form.KualiMaintenanceForm;
  import org.kuali.rice.kns.document.MaintenanceDocument;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * A values finder for returning KEW Action Request codes related to Kuali maintenance forms.
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   *
   */
  public class RuleMaintenanceActionRequestCodeValuesFinder extends ActionRequestCodeValuesFinder {
  
  	/**
  	 * @see org.kuali.rice.krad.keyvalues.KeyValuesFinder#getKeyValues()
  	 */
  	@Override
  	public List<KeyValue> getKeyValues() {
  		final List<KeyValue> actionRequestCodes = new ArrayList<KeyValue>();
  		// Acquire the Kuali form, and return the super class' result if the form is not a Kuali maintenance form.
  		final KualiForm kForm = KNSGlobalVariables.getKualiForm();
  		if (!(kForm instanceof KualiMaintenanceForm)) {
  			return super.getKeyValues();
  		}
  		// Acquire the Kuali maintenance form's document and its rule template.
  		final MaintenanceDocument maintDoc = (MaintenanceDocument) ((KualiMaintenanceForm) kForm).getDocument();
  		final RuleTemplate ruleTemplate = ((RuleBaseValues) maintDoc.getNewMaintainableObject().getBusinessObject()).getRuleTemplate();
  		// Ensure that the rule template is defined.
  		if (ruleTemplate == null) {
  			throw new RuntimeException("Rule template cannot be null for document ID " + maintDoc.getDocumentNumber());
  		}
  		// get the options to check for, as well as their related KEW constants.
  		final RuleTemplateOption[] ruleOpts = {ruleTemplate.getAcknowledge(), ruleTemplate.getComplete(),
  				ruleTemplate.getApprove(), ruleTemplate.getFyi()};
  		final String[] ruleConsts = {KEWConstants.ACTION_REQUEST_ACKNOWLEDGE_REQ, KEWConstants.ACTION_REQUEST_COMPLETE_REQ,
  				KEWConstants.ACTION_REQUEST_APPROVE_REQ, KEWConstants.ACTION_REQUEST_FYI_REQ};
  		// Add the rule options to the list if they are not defined (true by default) or if they are explicitly set to true.
  		for (int i = 0; i < ruleOpts.length; i++) {
  			if (ruleOpts[i] == null || ruleOpts[i].getValue() == null || "true".equals(ruleOpts[i].getValue())) {
  				actionRequestCodes.add(new ConcreteKeyValue(ruleConsts[i], KEWConstants.ACTION_REQUEST_CODES.get(ruleConsts[i])));
  			}
  		}
  		return actionRequestCodes;
  	}
  	
  }