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);
  	}
  }