package edu.sampleu.bookstore.rule;
   
   import java.util.List;
   
   import org.kuali.rice.core.util.RiceKeyConstants;
   import org.kuali.rice.kns.document.Document;
   
   import org.kuali.rice.kns.rules.TransactionalDocumentRuleBase;
   import org.kuali.rice.kns.util.GlobalVariables;
  import org.kuali.rice.kns.util.KNSConstants;
  import edu.sampleu.bookstore.bo.BookOrder;
  import edu.sampleu.bookstore.document.BookOrderDocument;
  
  
  /*
   * Business Rule for Book Order Document that follows prior to submit action.
   * Checks that book order/orders is/are not null or Empty and all the attributes are mentioned for each order.
   */
  
  public class BookOrderDocumentRule extends TransactionalDocumentRuleBase {
  
  	private static final String BOOK_ORDERS_PROPERTY_PATH = KNSConstants.DOCUMENT_PROPERTY_NAME + ".bookOrders";
  	private static final String NO_BOOK_ORDERS_ERROR_KEY = RiceKeyConstants.ERROR_CUSTOM;
  	private static final String ERROR_MESSAGE_NO_ORDERS = "You must add at least one entry to your book order.";
  	
  	private static final String BOOK_ORDERS_EMPTY_ERROR_KEY = RiceKeyConstants.ERROR_CUSTOM;
  	private static final String ERROR_MESSAGE_EMPTY_ORDERS = "You must add attributes to your book order.";
  	
  	@Override
  	protected boolean processCustomRouteDocumentBusinessRules(Document document) {
  		
  		System.out.println("@@@@ IN RULE CHECK");
  		
  		// cast the document to a BookOrderDocument
  		BookOrderDocument bookOrderDocument = (BookOrderDocument)document;
  		
  		// get the list of book orders of the book order document
  		List<BookOrder> bookOrders = bookOrderDocument.getBookOrders();
  		
  		// make sure that the list is not empty
  		if (bookOrders == null || bookOrders.isEmpty()) {
  			GlobalVariables.getMessageMap().putError(BOOK_ORDERS_PROPERTY_PATH, NO_BOOK_ORDERS_ERROR_KEY, ERROR_MESSAGE_NO_ORDERS);
  			System.out.println("@@@@ FALSE RULE CHECK");
  			return false;
  		} else {
  			for(BookOrder bookOrder : bookOrders){				
  				if(bookOrder.getBookId() == null || bookOrder.getDiscount() == null || bookOrder.getQuantity() == null){
  					GlobalVariables.getMessageMap().putError(BOOK_ORDERS_PROPERTY_PATH, BOOK_ORDERS_EMPTY_ERROR_KEY, ERROR_MESSAGE_EMPTY_ORDERS);
  					System.out.println("@@@@ FALSE RULE CHECK");
  					return false;
  				}				
  			}
  			
  		}
  		System.out.println("@@@@ TRUE RULE CHECK");
  		
  		return super.processCustomRouteDocumentBusinessRules(document);
  	}
  
  	
  
  	
  	
  }