/*
 * The Kuali Financial System, a comprehensive financial management system for higher education.
 * 
 * Copyright 2005-2014 The Kuali Foundation
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.kuali.kfs.module.purap.document.validation.impl;

import org.apache.commons.lang.StringUtils;
import org.kuali.kfs.module.purap.PurapKeyConstants;
import org.kuali.kfs.module.purap.PurapPropertyConstants;
import org.kuali.kfs.module.purap.document.VendorCreditMemoDocument;
import org.kuali.kfs.module.purap.document.service.PaymentRequestService;
import org.kuali.kfs.sys.KFSKeyConstants;
import org.kuali.kfs.sys.document.validation.GenericValidation;
import org.kuali.kfs.sys.document.validation.event.AttributedDocumentEvent;
import org.kuali.rice.kns.service.DataDictionaryService;
import org.kuali.rice.krad.bo.BusinessObject;
import org.kuali.rice.krad.util.GlobalVariables;
import org.kuali.rice.krad.util.ObjectUtils;

public class VendorCreditMemoInitTabRequiredFieldsValidation extends GenericValidation {
    
    private DataDictionaryService dataDictionaryService;
    private PaymentRequestService paymentRequestService;
    
    /**
     * Validates the necessary fields on the init tab were given and credit memo date is valid. (NOTE: formats for cm date and
     * number already performed by pojo conversion)
     */
    public boolean validate(AttributedDocumentEvent event) {
        VendorCreditMemoDocument cmDocument = (VendorCreditMemoDocument) event.getDocument();
        
        boolean valid = true;

        valid = validateRequiredField(cmDocument, PurapPropertyConstants.CREDIT_MEMO_NUMBER);
        valid = valid && validateRequiredField(cmDocument, PurapPropertyConstants.CREDIT_MEMO_AMOUNT);
        boolean creditMemoDateExist = validateRequiredField(cmDocument, PurapPropertyConstants.CREDIT_MEMO_DATE);

        if (creditMemoDateExist) {
            if (paymentRequestService.isInvoiceDateAfterToday(cmDocument.getCreditMemoDate())) {
                String label = dataDictionaryService.getAttributeErrorLabel(VendorCreditMemoDocument.class, PurapPropertyConstants.CREDIT_MEMO_DATE);
                GlobalVariables.getMessageMap().putError(PurapPropertyConstants.CREDIT_MEMO_DATE, PurapKeyConstants.ERROR_INVALID_INVOICE_DATE, label);
                valid = false;
            }
        }

        return valid;

    }

    /**
     * Helper method to perform required field checks add error messages if the validation fails. Adds an error required to
     * GlobalVariables.errorMap using the given fieldName as the error key and retrieving the error label from the data dictionary
     * for the error required message param.
     * 
     * @param businessObject - Business object to check for value
     * @param fieldName - Name of the property in the business object
     */
    protected boolean validateRequiredField(BusinessObject businessObject, String fieldName) {
        boolean valid = true;

        Object fieldValue = ObjectUtils.getPropertyValue(businessObject, fieldName);
        if (fieldValue == null || (fieldValue instanceof String && StringUtils.isBlank(fieldName))) {
            String label = dataDictionaryService.getAttributeErrorLabel(businessObject.getClass(), fieldName);
            GlobalVariables.getMessageMap().putError(fieldName, KFSKeyConstants.ERROR_REQUIRED, label);
            valid = false;
        }

        return valid;
    }

    public DataDictionaryService getDataDictionaryService() {
        return dataDictionaryService;
    }

    public void setDataDictionaryService(DataDictionaryService dataDictionaryService) {
        this.dataDictionaryService = dataDictionaryService;
    }

    public PaymentRequestService getPaymentRequestService() {
        return paymentRequestService;
    }

    public void setPaymentRequestService(PaymentRequestService paymentRequestService) {
        this.paymentRequestService = paymentRequestService;
    }

}