/*

  * Copyright 2007 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.kns.uif.widget;

 import java.security.GeneralSecurityException;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import java.util.Map.Entry;

 import java.util.Properties;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.services.CoreApiServiceLocator;

 import org.kuali.rice.core.web.format.Formatter;

 import org.kuali.rice.kns.service.KNSServiceLocator;

 import org.kuali.rice.kns.service.KNSServiceLocatorWeb;

 import org.kuali.rice.kns.uif.UifConstants;

 import org.kuali.rice.kns.uif.UifParameters;

 import org.kuali.rice.kns.uif.container.View;

 import org.kuali.rice.kns.uif.core.Component;

 import org.kuali.rice.kns.uif.field.AttributeField;

 import org.kuali.rice.kns.uif.field.LinkField;

 import org.kuali.rice.kns.uif.util.LookupInquiryUtils;

 import org.kuali.rice.kns.uif.util.ObjectPropertyUtils;

 import org.kuali.rice.kns.uif.util.ViewModelUtils;

 import org.kuali.rice.kns.util.UrlFactory;

 /**

  * Widget for rendering an Inquiry link on a field's value

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class Inquiry extends WidgetBase {

     private static final long serialVersionUID = -2154388007867302901L;

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(Inquiry.class);

     public static final String INQUIRY_TITLE_PREFIX = "title.inquiry.url.value.prependtext";

     private String baseInquiryUrl;

     private String dataObjectClassName;

     private String viewName;

     private Map<String, String> inquiryParameters;

     private boolean forceInquiry;

     private LinkField inquiryLinkField;    

     public Inquiry() {

         super();

         forceInquiry = false;

         inquiryParameters = new HashMap<String, String>();

     }

     /**

      * @see org.kuali.rice.kns.uif.widget.WidgetBase#performFinalize(org.kuali.rice.kns.uif.container.View,

      *      java.lang.Object, org.kuali.rice.kns.uif.core.Component)

      */

     @Override

     public void performFinalize(View view, Object model, Component parent) {

         super.performFinalize(view, model, parent);

         // only set inquiry if enabled

         if (!isRender() || !isReadOnly()) {

             return;

         }

         // set render to false until we find an inquiry class

         setRender(false);

         AttributeField field = (AttributeField) parent;

         // check if field value is null, if so no inquiry

         Object propertyValue = ObjectPropertyUtils.getPropertyValue(model, field.getBindingInfo().getBindingPath());

         if ((propertyValue == null) || StringUtils.isBlank(propertyValue.toString())) {

             return;

         }

         setupLink(view, model, field);

     }

     /**

      * Get parent object and field name and build the inquiry link

      * This was moved from the performFinalize because overlapping and to be used

      * by DirectInquiry

      * 

      * @param view

      *            - Container View

      * @param model

      *            - model

      * @param field

      *            - The parent Attribute field

      */

     public void setupLink(View view, Object model, AttributeField field) {

         // get parent object for inquiry

         Object parentObject = ViewModelUtils.getParentObjectForMetadata(view, model, field);

         String propertyName = field.getBindingInfo().getBindingName();

         // if class and parameters configured, build link from those

         if (StringUtils.isNotBlank(getDataObjectClassName()) && (getInquiryParameters() != null) && !getInquiryParameters().isEmpty()) {

             Class<?> inquiryObjectClass = null;

             try {

                 inquiryObjectClass = Class.forName(getDataObjectClassName());

             }

             catch (ClassNotFoundException e) {

                 LOG.error("Unable to get class for: " + getDataObjectClassName());

                 throw new RuntimeException(e);

             }

             buildInquiryLink(parentObject, propertyName, inquiryObjectClass, getInquiryParameters());

         }

         // get inquiry class and parameters from view helper

         else {

             view.getViewHelperService().buildInquiryLink(parentObject, propertyName, this);

         }            

     }

     /**

      * Builds the inquiry link based on the given inquiry class and parameters

      * 

      * @param dataObject

      *            - parent object that contains the data (used to pull inquiry

      *            parameters)

      * @param propertyName

      *            - name of the property the inquiry is set on

      * @param inquiryObjectClass

      *            - class of the object the inquiry should point to

      * @param inquiryParms

      *            - map of key field mappings for the inquiry

      */

     public void buildInquiryLink(Object dataObject, String propertyName, Class<?> inquiryObjectClass,

             Map<String, String> inquiryParms) {

         Properties urlParameters = new Properties();

         urlParameters.put(UifParameters.DATA_OBJECT_CLASS_NAME, inquiryObjectClass.getName());

         urlParameters.put(UifParameters.METHOD_TO_CALL, UifConstants.MethodToCallNames.START);

         for (Entry<String, String> inquiryParameter : inquiryParms.entrySet()) {

             String parameterName = inquiryParameter.getKey();

             Object parameterValue = ObjectPropertyUtils.getPropertyValue(dataObject, parameterName);

             // TODO: need general format util that uses spring

             if (parameterValue == null) {

                 parameterValue = "";

             }

             else if (parameterValue instanceof java.sql.Date) {

                 if (Formatter.findFormatter(parameterValue.getClass()) != null) {

                     Formatter formatter = Formatter.getFormatter(parameterValue.getClass());

                     parameterValue = formatter.format(parameterValue);

                 }

             }

             else {

                 parameterValue = parameterValue.toString();

             }

             // Encrypt value if it is a field that has restriction that prevents

             // a value from being shown to user, because we don't want the

             // browser history to store the restricted

             // attribute's value in the URL

             if (KNSServiceLocatorWeb.getBusinessObjectAuthorizationService()

                     .attributeValueNeedsToBeEncryptedOnFormsAndLinks(inquiryObjectClass, inquiryParameter.getValue())) {

                 try {

                     parameterValue = CoreApiServiceLocator.getEncryptionService().encrypt(parameterValue);

                 }

                 catch (GeneralSecurityException e) {

                     LOG.error("Exception while trying to encrypted value for inquiry framework.", e);

                     throw new RuntimeException(e);

                 }

             }

             // add inquiry parameter to URL

             urlParameters.put(inquiryParameter.getValue(), parameterValue);

         }

         String inquiryUrl = UrlFactory.parameterizeUrl(getBaseInquiryUrl(), urlParameters);

         getInquiryLinkField().setHrefText(inquiryUrl);

         // get inquiry link text

         // TODO: should we really put the link label here or just wrap the

         // written value?

         Object fieldValue = ObjectPropertyUtils.getPropertyValue(dataObject, propertyName);

         if (fieldValue != null) {

                 getInquiryLinkField().setLinkLabel(fieldValue.toString());

         }

         // set inquiry title

         String linkTitle = createTitleText(inquiryObjectClass);

         linkTitle = LookupInquiryUtils.getTitleText(linkTitle, inquiryObjectClass, getInquiryParameters());

         getInquiryLinkField().setTitle(linkTitle);

         setRender(true);

     }

     /**

      * Gets text to prepend to the inquiry link title

      * 

      * @param dataObjectClass

      *            - data object class being inquired into

      * @return String title prepend text

      */

     public String createTitleText(Class<?> dataObjectClass) {

         String titleText = "";

         String titlePrefixProp = KNSServiceLocator.getKualiConfigurationService().getPropertyString(

                 INQUIRY_TITLE_PREFIX);

         if (StringUtils.isNotBlank(titlePrefixProp)) {

             titleText += titlePrefixProp + " ";

         }

         String objectLabel = KNSServiceLocatorWeb.getDataDictionaryService().getDataDictionary()

                 .getDataObjectEntry(dataObjectClass.getName()).getObjectLabel();

         if (StringUtils.isNotBlank(objectLabel)) {

             titleText += objectLabel + " ";

         }

         return titleText;

     }

     /**

      * @see org.kuali.rice.kns.uif.core.ComponentBase#getNestedComponents()

      */

     @Override

     public List<Component> getNestedComponents() {

         List<Component> components = super.getNestedComponents();

         components.add(getInquiryLinkField());

         return components;

     }

     public String getBaseInquiryUrl() {

         return this.baseInquiryUrl;

     }

     public void setBaseInquiryUrl(String baseInquiryUrl) {

         this.baseInquiryUrl = baseInquiryUrl;

     }

     public String getDataObjectClassName() {

         return this.dataObjectClassName;

     }

     public void setDataObjectClassName(String dataObjectClassName) {

         this.dataObjectClassName = dataObjectClassName;

     }

     public String getViewName() {

         return this.viewName;

     }

     public void setViewName(String viewName) {

         this.viewName = viewName;

     }

     public boolean isForceInquiry() {

         return this.forceInquiry;

     }

     public void setForceInquiry(boolean forceInquiry) {

         this.forceInquiry = forceInquiry;

     }

     public Map<String, String> getInquiryParameters() {

         return this.inquiryParameters;

     }

     public void setInquiryParameters(Map<String, String> inquiryParameters) {

         this.inquiryParameters = inquiryParameters;

     }

     public LinkField getInquiryLinkField() {

         return this.inquiryLinkField;

     }

     public void setInquiryLinkField(LinkField inquiryLinkField) {

         this.inquiryLinkField = inquiryLinkField;

     }

 }