/**
    * Copyright 2005-2013 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.krad.uif.util;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.CoreApiServiceLocator;
  import org.kuali.rice.core.api.encryption.EncryptionService;
  import org.kuali.rice.core.web.format.Formatter;
  import org.kuali.rice.krad.service.KRADServiceLocatorWeb;
  import org.kuali.rice.krad.util.KRADConstants;
  import org.kuali.rice.krad.web.form.UifFormBase;
  
  import javax.servlet.http.HttpServletRequest;
  import java.security.GeneralSecurityException;
  import java.util.Map;
  
  /**
   * Class for utility methods that pertain to UIF Lookup processing
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class LookupInquiryUtils {
  	private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(LookupInquiryUtils.class);
  
  	public static String retrieveLookupParameterValue(UifFormBase form, HttpServletRequest request,
  			Class<?> lookupObjectClass, String propertyName, String propertyValueName) {
  		String parameterValue = "";
  
  		// get literal parameter values first
  		if (StringUtils.startsWith(propertyValueName, "'") && StringUtils.endsWith(propertyValueName, "'")) {
              parameterValue = StringUtils.removeStart(propertyValueName, "'");
  			parameterValue = StringUtils.removeEnd(propertyValueName, "'");
  		}
  		else if (parameterValue.startsWith(KRADConstants.LOOKUP_PARAMETER_LITERAL_PREFIX
  				+ KRADConstants.LOOKUP_PARAMETER_LITERAL_DELIMITER)) {
  			parameterValue = StringUtils.removeStart(parameterValue, KRADConstants.LOOKUP_PARAMETER_LITERAL_PREFIX
  					+ KRADConstants.LOOKUP_PARAMETER_LITERAL_DELIMITER);
  		}
  		// check if parameter is in request
  		else if (request.getParameterMap().containsKey(propertyValueName)) {
  			parameterValue = request.getParameter(propertyValueName);
  		}
  		// get parameter value from form object
  		else {
  			Object value = ObjectPropertyUtils.getPropertyValue(form, propertyValueName);
  			if (value != null) {
  				if (value instanceof String) {
  					parameterValue = (String) value;
  				}
  
  				Formatter formatter = Formatter.getFormatter(value.getClass());
  				parameterValue = (String) formatter.format(value);
  			}
  		}
  
  		if (parameterValue != null
  				&& lookupObjectClass != null
  				&& KRADServiceLocatorWeb.getDataObjectAuthorizationService()
  						.attributeValueNeedsToBeEncryptedOnFormsAndLinks(lookupObjectClass, propertyName)) {
  			try {
                  if(CoreApiServiceLocator.getEncryptionService().isEnabled()) {
  				    parameterValue = CoreApiServiceLocator.getEncryptionService().encrypt(parameterValue)
  					    	+ EncryptionService.ENCRYPTION_POST_PREFIX;
                  }
  			}
  			catch (GeneralSecurityException e) {
  				LOG.error("Unable to encrypt value for property name: " + propertyName);
  				throw new RuntimeException(e);
  			}
  		}
  
  		return parameterValue;
  	}
  
      public static String getBaseLookupUrl() {
          return CoreApiServiceLocator.getKualiConfigurationService().
                  getPropertyValueAsString(KRADConstants.KRAD_LOOKUP_URL_KEY);
      }
  
      /**
  	 * Helper method for building the title text for an element and a map of
  	 * key/value pairs
  	 *
  	 * @param prependText text to prepend to the title
  	 * @param element element class the title is being generated for, used to as
  	 *            the parent for getting the key labels
 	 * @param keyValueMap map of key value pairs to add to the title text
 	 * @return title text
 	 */
 	public static String getLinkTitleText(String prependText, Class<?> element, Map<String, String> keyValueMap) {
 		StringBuffer titleText = new StringBuffer(prependText);
 		for (String key : keyValueMap.keySet()) {
 			String fieldVal = keyValueMap.get(key).toString();
 
 			titleText.append(" " + KRADServiceLocatorWeb.getDataDictionaryService().getAttributeLabel(element, key) + "="
 					+ fieldVal.toString());
 		}
 
 		return titleText.toString();
 	}
 
 }