package org.kuali.student.common.messagebuilder.impl;

 import java.util.ArrayList;

 import java.util.List;

 import org.kuali.student.common.messagebuilder.MessageTreeBuilder;

 import org.kuali.student.common.messagebuilder.booleanmessage.ast.BooleanNode;

 import org.kuali.student.common.messagebuilder.impl.exceptions.MessageBuilderException;

 /**

  * This class builds the success and failure messages for 

  * boolean binary tree nodes.

  */

 public class SuccessFailureMessageBuilder implements MessageTreeBuilder {

         /** Boolean operators to use in creating the success and failure messages */

         private BooleanOperators booleanOperators;

         private SuccessMessageBuilder successMessageBuilder;

         private FailureMessageBuilder failureMessageBuilder;

         /**

          * Creates a success and failure message builders.

          * 

          * @param andOperator AND logical operator

          * @param orOperator OR logical operator

          */

         public SuccessFailureMessageBuilder(String andOperator, String orOperator) {

                 this.booleanOperators = new BooleanOperators(andOperator, orOperator);

                 this.successMessageBuilder = new SuccessMessageBuilder(this.booleanOperators);

                 this.failureMessageBuilder = new FailureMessageBuilder(this.booleanOperators);

         }

         /**

          * Creates a success and failure message builders.

          * 

          * @param bo Boolean operators

          */

         public SuccessFailureMessageBuilder(BooleanOperators bo) {

                 this.booleanOperators = bo;

                 this.successMessageBuilder = new SuccessMessageBuilder(this.booleanOperators);

                 this.failureMessageBuilder = new FailureMessageBuilder(this.booleanOperators);

         }

         /**

          * Builds and sets the success and failure message for each of the list of 

          * boolean nodes (binary tree nodes).

          * 

          * @param nodeList List of boolean nodes 

          */

         public String buildMessage(List<BooleanNode> nodeList) {

                 // List must only contain one root node

                 List<BooleanNode> rootNodeList = new ArrayList<BooleanNode>();

                 for(BooleanNode node : nodeList) {

                         if(node.getParent() == null) {

                                 rootNodeList.add(node);

                         }

                         buildMessage(node);

                 }

                 if(rootNodeList.size() > 1) {

                         throw new MessageBuilderException("Node list contains more than one root node: " + rootNodeList);

                 }

                 return rootNodeList.get(0).getNodeMessage();

         }

         /**

          * Builds and sets the success and failure message for a boolean node 

          * (binary tree node).

          * 

          * @param node Boolean node

          */

         private void buildMessage(final BooleanNode node) {

                 this.successMessageBuilder.buildSuccessMessage(node);

                 this.failureMessageBuilder.buildFailureMessage(node);

         }

 }