/*
    * Copyright 2009 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.contract.model.validation;
  
  import org.kuali.student.contract.model.Constraint;
  import org.kuali.student.contract.model.Dictionary;
  import org.kuali.student.contract.model.DictionaryModel;
  import org.kuali.student.contract.model.Field;
  import org.kuali.student.contract.model.XmlType;
  import org.kuali.student.contract.model.util.ModelFinder;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  /**
   * Validates the entire spreadsheet model
   * @author nwright
   */
  public class DictionaryModelValidator implements ModelValidator {
  
      private DictionaryModel model;
      private ModelFinder finder;
  
      public DictionaryModelValidator(DictionaryModel model) {
          this.model = model;
          this.finder = new ModelFinder(model);
      }
      List<String> errors;
  
      @Override
      public Collection<String> validate() {
          errors = new ArrayList();
          validateConstraints();
          validateFields();
          validateDefaultDictionary();
          validateStateOverrideDictionary();
          checkForDuplicateDictionaryEntries();
          return errors;
      }
  
      private void validateConstraints() {
          if (model.getConstraints().size() == 0) {
              addError("No constraints found");
          }
          for (Constraint cons : model.getConstraints()) {
              ConstraintValidator cv = new ConstraintValidator(cons);
              errors.addAll(cv.validate());
          }
      }
  
      private void validateFields() {
          if (model.getFields().size() == 0) {
              addError("No fields found");
          }
          for (Field field : model.getFields()) {
              FieldValidator fv = new FieldValidator(field, model);
              errors.addAll(fv.validate());
          }
      }
  
      private void validateDefaultDictionary() {
          if (finder.findDefaultDictionary().size() == 0) {
              addError("No dictionary entries for the (default) state found");
          }
          for (Dictionary dict : finder.findDefaultDictionary()) {
              DictionaryValidator dv = new DictionaryValidator(dict, model);
              errors.addAll(dv.validate());
          }
      }
  
      private void validateStateOverrideDictionary() {
  
          if (finder.findStateOverrideDictionary().size() == 0) {
              addError("No dictionary entries that override for the (default) state found");
          }
          for (Dictionary dict : finder.findStateOverrideDictionary()) {
              DictionaryValidator dv = new DictionaryValidator(dict, model);
              errors.addAll(dv.validate());
          }
      }
  
      private void checkForDuplicateDictionaryEntries() {
          Set dups = new HashSet();
         for (Dictionary dict : finder.findDefaultDictionary()) {
             if (!dups.add(dict.getId())) {
                 addError("Duplicate ID's found in dictionary: " + dict.getId());
             }
         }
         for (Dictionary dict : finder.findStateOverrideDictionary()) {
             if (!dups.add(dict.getId())) {
                 addError("Duplicate ID's found in dictionary: " + dict.getId());
             }
         }
     }
 
     private void addError(String msg) {
         String error = "Error in overall spreadsheet: " + msg;
         if (!errors.contains(error)) {
             errors.add(error);
         }
     }
 }