/**
    * Copyright 2010 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.lum.program.server.metadata;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.kuali.student.common.assembly.data.ConstraintMetadata;
  import org.kuali.student.common.assembly.dictionary.MetadataServiceImpl;
  import org.kuali.student.common.dictionary.dto.FieldDefinition;
  import org.kuali.student.common.dictionary.service.DictionaryService;
  import org.kuali.student.common.dto.DtoConstants.DtoState;
  import org.kuali.student.lum.lu.LUConstants;
  
  /**
   * This class provides metadata lookup for service dto objects.
   * 
   * @author Kuali Student Team
   */
  public class ProgramMetadataServiceImpl extends MetadataServiceImpl {
  
      public ProgramMetadataServiceImpl() {
  		super();
  	}
  
  	public ProgramMetadataServiceImpl(DictionaryService... dictionaryServices) {
          super(dictionaryServices);
      }
  
      @Override
      protected List<ConstraintMetadata> getConstraints(FieldDefinition fd, String type, String state, String nextState,
              String workflowNode, String documentTypeName) {
          List<ConstraintMetadata> constraints = new ArrayList<ConstraintMetadata>();
          ConstraintMetadata constraintMetadata = new ConstraintMetadata();
          //The nextState should not get a defaulted value when we're using Modify Program Proposal functionality.
          String nextStateValue = nextState;
          if (!LUConstants.PROPOSAL_TYPE_MAJOR_DISCIPLINE_MODIFY.equals(documentTypeName)) {
              nextStateValue = getNextState(state);
          }
          updateConstraintMetadata(constraintMetadata, fd, type, getNonNullState(state), nextStateValue, workflowNode);
          constraints.add(constraintMetadata);
  
          return constraints;
      }
  
      private String getNonNullState(String state) {
          return (null == state ? DtoState.DRAFT.toString() : state);
      }
  
      private String getNextState(String state) {
          if (null == state || DtoState.DRAFT.toString().equalsIgnoreCase(state)) {
              return DtoState.APPROVED.toString();
          } else if (DtoState.APPROVED.toString().equalsIgnoreCase(state)) {
              return DtoState.ACTIVE.toString();
          } else if (DtoState.ACTIVE.toString().equalsIgnoreCase(state)) {
              return DtoState.SUPERSEDED.toString();
          }
          return null;
      }
  }