/**
    * Copyright 2014 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.osedu.org/licenses/ECL-2.0
    *
    * 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.student.cm.course.modifiers;
  
  import org.kuali.rice.krad.uif.component.Component;
  import org.kuali.rice.krad.uif.container.Group;
  import org.kuali.rice.krad.uif.layout.GridLayoutManager;
  import org.kuali.rice.krad.uif.modifier.CompareFieldCreateModifier;
  import org.kuali.rice.krad.web.form.MaintenanceDocumentForm;
  import org.kuali.student.cm.course.form.ViewCourseForm;
  import org.kuali.student.cm.course.form.wrapper.CourseInfoWrapper;
  import org.kuali.student.cm.course.util.CourseProposalUtil;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * A compare modifier which deals with comparing requisites. It doesn't do a line by line comparison. It simply
   * highlights the entire requisites section.
   */
  public class RequisitesCompareModifier extends CompareFieldCreateModifier {
  
      @Override
      public void performModification(Object model, Component component) {
          if (component == null) {
              return;
          }
  
          if ((component != null) && !(component instanceof Group)) {
              throw new IllegalArgumentException(
                      "Compare field initializer only support Group components which contain requisites: " + component.getClass());
          }
  
          Group group = (Group) component;
          CourseInfoWrapper leftDataObject = null;
          CourseInfoWrapper rightDataObject = null;
  
          if (model instanceof MaintenanceDocumentForm) {
              leftDataObject = (CourseInfoWrapper) ((MaintenanceDocumentForm) model).getDocument().getNewMaintainableObject().getDataObject();
              rightDataObject = (CourseInfoWrapper) ((MaintenanceDocumentForm) model).getDocument().getOldMaintainableObject().getDataObject();
          } else if (model instanceof ViewCourseForm) {
              leftDataObject = ((ViewCourseForm) model).getCourseInfoWrapper();
              rightDataObject = ((ViewCourseForm) model).getCompareCourseInfoWrapper();
          } else {
              throw new RuntimeException("Unsupported model class.");
          }
  
          boolean isRequisitesEqual = CourseProposalUtil.isRequisitesEqual(leftDataObject.getAgendas(), rightDataObject.getAgendas());
  
          //  If the requisites aren't equal then highlight the row
          if (! isRequisitesEqual) {
              List<String> rowCssClasses = new ArrayList<>();
              rowCssClasses.add("cm-compare-highlighter");
              if (group.getLayoutManager() instanceof GridLayoutManager) {
                  ((GridLayoutManager)group.getLayoutManager()).setRowCssClasses(rowCssClasses);
              }
          }
      }
  }