/**
    * Copyright 2005-2012 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.rice.krad.web.controller;
  
  import java.util.Collections;
  import java.util.Map;
  import java.util.Properties;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.kuali.rice.core.api.exception.RiceRuntimeException;
  import org.kuali.rice.krad.bo.Exporter;
  import org.kuali.rice.krad.datadictionary.DataObjectEntry;
  import org.kuali.rice.krad.service.KRADServiceLocatorWeb;
  import org.kuali.rice.krad.service.ModuleService;
  import org.kuali.rice.krad.uif.UifParameters;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.KRADConstants;
  import org.kuali.rice.krad.util.KRADUtils;
  import org.kuali.rice.krad.web.form.InquiryForm;
  import org.kuali.rice.krad.web.form.UifFormBase;
  import org.springframework.stereotype.Controller;
  import org.springframework.validation.BindingResult;
  import org.springframework.web.bind.annotation.ModelAttribute;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.servlet.ModelAndView;
  
  /**
   * Controller for <code>InquiryView</code> screens which handle initial requests for the inquiry and
   * actions coming from the inquiry view such as export
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @Controller
  @RequestMapping(value = "/inquiry")
  public class InquiryController extends UifControllerBase {
      private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(InquiryController.class);
  
      /**
       * @see org.kuali.rice.krad.web.controller.UifControllerBase#createInitialForm(javax.servlet.http.HttpServletRequest)
       */
      @Override
      protected InquiryForm createInitialForm(HttpServletRequest request) {
          return new InquiryForm();
      }
  
      /**
       * Invoked to request an inquiry view for a data object class
       *
       * <p>
       * Checks if the data object is externalizable and we need to redirect to the appropriate inquiry URL, else
       * continues with the inquiry view display
       * </p>
       *
       * <p>
       * Data object class name and values for a primary or alternate key set must
       * be sent in the request
       * </p>
       *
       * <p>
       * Invokes the inquirable to perform the query for the data object record, if not found
       * an exception will be thrown. If found the object is set on the form and then the view
       * is rendered
       * </p>
       */
      @RequestMapping(params = "methodToCall=start")
      @Override
      public ModelAndView start(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
              HttpServletRequest request, HttpServletResponse response) {
          InquiryForm inquiryForm = (InquiryForm) form;
  
          // if request is not a redirect, determine if we need to redirect for an externalizable object inquiry
          if (!inquiryForm.isRedirectedInquiry()) {
              Class inquiryObjectClass = null;
              try {
                  inquiryObjectClass = Class.forName(inquiryForm.getDataObjectClassName());
              } catch (ClassNotFoundException e) {
                  throw new RiceRuntimeException("Unable to get class for name: " + inquiryForm.getDataObjectClassName());
              }
  
              ModuleService responsibleModuleService =
                      KRADServiceLocatorWeb.getKualiModuleService().getResponsibleModuleService(inquiryObjectClass);
              if (responsibleModuleService != null && responsibleModuleService.isExternalizable(inquiryObjectClass)) {
                  String inquiryUrl = responsibleModuleService.getExternalizableDataObjectInquiryUrl(inquiryObjectClass,
                          KRADUtils.convertRequestMapToProperties(request.getParameterMap()));
 
                 Properties redirectUrlProps = new Properties();
                 redirectUrlProps.put(UifParameters.REDIRECTED_INQUIRY, "true");
 
                 // clear current form from session
                 GlobalVariables.getUifFormManager().removeForm(form);
 
                 return performRedirect(form, inquiryUrl, redirectUrlProps);
             }
         }
 
         // initialize data object class in inquirable
         try {
             inquiryForm.getInquirable().setDataObjectClass(Class.forName(inquiryForm.getDataObjectClassName()));
         } catch (ClassNotFoundException e) {
             LOG.error("Unable to get new instance for object class: " + inquiryForm.getDataObjectClassName(), e);
             throw new RuntimeException(
                     "Unable to get new instance for object class: " + inquiryForm.getDataObjectClassName(), e);
         }
 
         // invoke inquirable to retrieve inquiry data object
         Object dataObject = inquiryForm.getInquirable().retrieveDataObject(KRADUtils.translateRequestParameterMap(
                 request.getParameterMap()));
 
         inquiryForm.setDataObject(dataObject);
 
         return super.start(form, result, request, response);
     }
 
     /**
      * Handles exporting the BusinessObject for this Inquiry to XML if it has a custom XML exporter available.
      */
     @RequestMapping(params = "methodToCall=export")
     public ModelAndView export(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
         InquiryForm inquiryForm = (InquiryForm) form;
 
         Object dataObject = inquiryForm.getDataObject();
         if (dataObject != null) {
             DataObjectEntry dataObjectEntry =
                     KRADServiceLocatorWeb.getDataDictionaryService().getDataDictionary().getDataObjectEntry(
                             inquiryForm.getDataObjectClassName());
 
             Class<? extends Exporter> exporterClass = dataObjectEntry.getExporterClass();
             if (exporterClass != null) {
                 Exporter exporter = exporterClass.newInstance();
 
                 response.setContentType(KRADConstants.XML_MIME_TYPE);
                 response.setHeader("Content-disposition", "attachment; filename=export.xml");
                 exporter.export(dataObjectEntry.getDataObjectClass(), Collections.singletonList(dataObject),
                         KRADConstants.XML_FORMAT, response.getOutputStream());
             }
         }
 
         return null;
     }
 }