package org.kuali.student.process.poc.evaluator;

 import java.util.ArrayList;

 import java.util.List;

 import org.kuali.student.process.poc.context.SubProcessCheckContext;

 import org.kuali.student.r2.common.dto.ContextInfo;

 import org.kuali.student.r2.common.dto.ValidationResultInfo;

 import org.kuali.student.r2.common.exceptions.OperationFailedException;

 import org.kuali.student.r2.core.process.dto.InstructionInfo;

 public class SubProcessCheckEvaluator implements CheckEvaluator<SubProcessCheckContext> {

     @Override

     public List<ValidationResultInfo> evaluate(SubProcessCheckContext checkContext, ContextInfo context) throws OperationFailedException {

         List<ValidationResultInfo> vrs = new ArrayList<ValidationResultInfo>();

         ValidationResultInfo vr = null;

         // rerun the process evaluator with the new process key

         String oldProcessKey = null;

         try {

             oldProcessKey = checkContext.getProcessContext().getProcessKey();

             checkContext.getProcessContext().setProcessKey(checkContext.getCheck().getProcessKey());

             vrs = checkContext.getProcessEvaluator().evaluate(checkContext.getProcessContext(), context);

         } finally {

             // set it back so we don't mess stuff up

             checkContext.getProcessContext().setProcessKey(oldProcessKey);

         }

         if (hasErrors(vrs)) {

             vr = initInfo(checkContext.getInstruction());

             vrs.add(vr);

             vr.setMessage("you have errors in the subprocess");

             return vrs;

         }

         vr = initInfo(checkContext.getInstruction());

         vrs.add(vr);

         vr.setMessage("no errors were found in the subprocess");

         return vrs;

     }

     public static boolean hasErrors(List<ValidationResultInfo> vrs) {

         for (ValidationResultInfo vr : vrs) {

             if (vr.isError()) {

                 return true;

             }

             if (vr.isWarn()) {

                 return true;

             }

         }

         return false;

     }

     private static ValidationResultInfo initError(InstructionInfo instruction) {

         return MilestoneCheckEvaluator.initError(instruction);

     }

     private static ValidationResultInfo initInfo(InstructionInfo instruction) {

         return MilestoneCheckEvaluator.initInfo(instruction);

     }

 }