package edu.sampleu.bookstore.rule;

 import java.util.List;

 import org.kuali.rice.core.util.RiceKeyConstants;

 import org.kuali.rice.krad.document.Document;

 import org.kuali.rice.krad.rules.TransactionalDocumentRuleBase;

 import org.kuali.rice.krad.util.GlobalVariables;

 import org.kuali.rice.krad.util.KRADConstants;

 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 = KRADConstants.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);

         }

 }