/**
 *
 * Copyright
 * 2009-2015 Jayway Products AB
 * 2016-2017 Föreningen Sambruk
 *
 * Licensed under AGPL, Version 3.0 (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.gnu.org/licenses/agpl.txt
 *
 * 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 se.streamsource.streamflow.web.context.workspace.cases;

import se.streamsource.dci.api.InteractionConstraint;
import se.streamsource.dci.api.InteractionConstraintDeclaration;
import se.streamsource.dci.api.RoleMap;
import se.streamsource.streamflow.web.domain.interaction.gtd.Ownable;
import se.streamsource.streamflow.web.domain.interaction.gtd.Owner;
import se.streamsource.streamflow.web.domain.structure.casetype.CaseType;
import se.streamsource.streamflow.web.domain.structure.casetype.TypedCase;
import se.streamsource.streamflow.web.domain.structure.caze.Case;
import se.streamsource.streamflow.web.domain.structure.project.CaseTypeRequired;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Check if current case needs to have case type set before it can be closed.
 */
@InteractionConstraintDeclaration(RequiresCaseType.RequiresCaseTypeConstraint.class)
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.TYPE})
public @interface RequiresCaseType
{
   boolean value() default true; // True -> CaseType must be set before close

   class RequiresCaseTypeConstraint
         implements InteractionConstraint<RequiresCaseType>
   {
      public boolean isValid( RequiresCaseType requiresCaseType, RoleMap roleMap )
      {
         Case caze = RoleMap.role(Case.class);
         Owner owner =  ((Ownable.Data)caze).owner().get();
         boolean caseTypeRequired = ((CaseTypeRequired.Data)owner).caseTypeRequired().get();
         CaseType type = (( TypedCase.Data )caze).caseType().get();

         if (requiresCaseType.value())
         {
             return isCaseTypeRequiredAndNotSet(caseTypeRequired, type);
         } else
         {
             return isCaseTypeNotRequiredOrCaseTypeSet(caseTypeRequired, type);
         }
      }

       private boolean isCaseTypeRequiredAndNotSet(boolean caseTypeRequired, CaseType type) {
           return caseTypeRequired && type == null;
       }

       private boolean isCaseTypeNotRequiredOrCaseTypeSet(boolean caseTypeRequired, CaseType type) {
           return !caseTypeRequired || type != null;
       }
   }
}