/*
    * Copyright 2008-2009 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.ole.module.purap.document.authorization;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.ole.module.purap.PurapAuthorizationConstants.InvoiceEditMode;
  import org.kuali.ole.module.purap.PurapConstants.InvoiceStatuses;
  import org.kuali.ole.module.purap.PurapConstants.PurchaseOrderStatuses;
  import org.kuali.ole.module.purap.PurapParameterConstants;
  import org.kuali.ole.module.purap.businessobject.InvoiceItem;
  import org.kuali.ole.module.purap.document.InvoiceDocument;
  import org.kuali.ole.module.purap.document.service.PurapService;
  import org.kuali.ole.sys.OLEConstants;
  import org.kuali.ole.sys.OleAuthorizationConstants;
  import org.kuali.ole.sys.context.SpringContext;
  import org.kuali.ole.sys.service.FinancialSystemWorkflowHelperService;
  import org.kuali.ole.sys.service.impl.OleParameterConstants;
  import org.kuali.rice.coreservice.framework.parameter.ParameterService;
  import org.kuali.rice.kew.api.WorkflowDocument;
  import org.kuali.rice.kew.api.action.ActionType;
  import org.kuali.rice.kew.api.action.ValidActions;
  import org.kuali.rice.krad.document.Document;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.ObjectUtils;
  
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Set;
  
  
  public class InvoiceDocumentPresentationController extends PurchasingAccountsPayableDocumentPresentationController {
  
      Boolean canHold;
      Boolean canRequestCancel;
      Boolean canEditPreExtraction;
  
      @Override
      public boolean canSave(Document document) {
          InvoiceDocument invoiceDocument = (InvoiceDocument) document;
  
          if (!StringUtils.equalsIgnoreCase(invoiceDocument.getDocumentHeader().getWorkflowDocument().getStatus().name(), InvoiceStatuses.APPDOC_INITIATE)
                 && !StringUtils.equalsIgnoreCase(invoiceDocument.getDocumentHeader().getWorkflowDocument().getStatus().name(), OLEConstants.OleInvoice.INVOICE_SAVED)) {
              return false;
          }
  
          if (canEditPreExtraction(invoiceDocument)) {
              return true;
          }
  
          return super.canSave(document);
      }
  
      @Override
      public boolean canReload(Document document) {
          InvoiceDocument invoiceDocument = (InvoiceDocument) document;
  
          if (StringUtils.equals(invoiceDocument.getApplicationDocumentStatus(), InvoiceStatuses.APPDOC_INITIATE)) {
              return false;
          }
  
          if (canEditPreExtraction(invoiceDocument)) {
              return true;
          }
  
          return super.canReload(document);
      }
  
      @Override
      public boolean canCancel(Document document) {
          //controlling the cancel button through getExtraButtons in InvoiceForm
          return false;
      }
  
      @Override
      public boolean canApprove(Document document) {
          InvoiceDocument invoiceDocument = (InvoiceDocument) document;
  
          if (invoiceDocument.isInvoiceCancelIndicator() || invoiceDocument.isHoldIndicator()) {
              return false;
          }
  
          return super.canApprove(document);
      }
  
      @Override
     public boolean canCopy (Document document) {
         InvoiceDocument invoiceDocument = (InvoiceDocument) document;
         if (super.canCopy(document)) {
             if (!StringUtils.equalsIgnoreCase(invoiceDocument.getDocumentHeader().getWorkflowDocument().getStatus().name(), InvoiceStatuses.APPDOC_INITIATE)) {
                 return true;
             }
         }
         return false;
 
     }
 
     @Override
     public boolean canDisapprove(Document document) {
 
         WorkflowDocument workflowDocument = document.getDocumentHeader().getWorkflowDocument();
         if (workflowDocument.isEnroute()) {
             ValidActions validActions = workflowDocument.getValidActions();
             return validActions.getValidActions().contains(ActionType.DISAPPROVE);
         }
 
         return super.canDisapprove(document);
     }
 
     /**
      * @see org.kuali.rice.krad.document.DocumentPresentationControllerBase#canEdit(org.kuali.rice.krad.document.Document)
      */
     @Override
     public boolean canEdit(Document document) {
         InvoiceDocument invoiceDocument = (InvoiceDocument) document;
         boolean fullDocEntryCompleted = SpringContext.getBean(PurapService.class).isFullDocumentEntryCompleted(invoiceDocument);
 
         // if the hold or cancel indicator is true, don't allow editing
         if (invoiceDocument.isHoldIndicator() || invoiceDocument.isInvoiceCancelIndicator()) {
             return false;
         }
         if (fullDocEntryCompleted) {
             //  after fullDocEntry is completed, only fiscal officer reviewers can edit
             if (invoiceDocument.isDocumentStoppedInRouteNode(InvoiceStatuses.NODE_ACCOUNT_REVIEW)) {
                 return true;
             }
             return false;
         } else {
             //before fullDocEntry is completed, document can be edited (could be preroute or enroute)
             return true;
         }
     }
 
     /**
      * @see org.kuali.rice.kns.document.authorization.TransactionalDocumentPresentationControllerBase#getEditModes(org.kuali.rice.krad.document.Document)
      */
     @Override
     public Set<String> getEditModes(Document document) {
         Set<String> editModes = super.getEditModes(document);
 
         InvoiceDocument invoiceDocument = (InvoiceDocument) document;
 
         if (canProcessorCancel(invoiceDocument)) {
             editModes.add(InvoiceEditMode.ACCOUNTS_PAYABLE_PROCESSOR_CANCEL);
         }
 
         if (canManagerCancel(invoiceDocument)) {
             editModes.add(InvoiceEditMode.ACCOUNTS_PAYABLE_MANAGER_CANCEL);
         }
 
         if (canHold(invoiceDocument)) {
             editModes.add(InvoiceEditMode.HOLD);
         }
 
         if (canRequestCancel(invoiceDocument)) {
             editModes.add(InvoiceEditMode.REQUEST_CANCEL);
         }
 
         if (canRemoveHold(invoiceDocument)) {
             editModes.add(InvoiceEditMode.REMOVE_HOLD);
         }
 
         if (canRemoveRequestCancel(invoiceDocument)) {
             editModes.add(InvoiceEditMode.REMOVE_REQUEST_CANCEL);
         }
 
         if (canProcessorInit(invoiceDocument)) {
             editModes.add(InvoiceEditMode.DISPLAY_INIT_TAB);
         }
 
         if (ObjectUtils.isNotNull(invoiceDocument.getVendorHeaderGeneratedIdentifier())) {
             editModes.add(InvoiceEditMode.LOCK_VENDOR_ENTRY);
         }
 
         if (SpringContext.getBean(PurapService.class).isFullDocumentEntryCompleted(invoiceDocument)) {
             editModes.add(InvoiceEditMode.FULL_DOCUMENT_ENTRY_COMPLETED);
         }
         //else if (ObjectUtils.isNotNull(invoiceDocument.getPurchaseOrderDocument()) && PurchaseOrderStatuses.APPDOC_OPEN.equals(invoiceDocument.getPurchaseOrderDocument().getApplicationDocumentStatus())) {
           /*
             String documentTypeName = OLEConstants.FinancialDocumentTypeCodes.PAYMENT_REQUEST;
             String nameSpaceCode = OLEConstants.CoreModuleNamespaces.SELECT;
 
             AttributeSet permissionDetails = new AttributeSet();
             permissionDetails.put(KimAttributes.DOCUMENT_TYPE_NAME,documentTypeName);
 
             boolean canClosePO = KIMServiceLocator.getIdentityManagementService().hasPermission(GlobalVariables.getUserSession().getPerson().getPrincipalId(), nameSpaceCode,
                     OLEConstants.OleInvoice.CAN_CLOSE_PO, permissionDetails);
             if(canClosePO) {
             editModes.add(InvoiceEditMode.ALLOW_CLOSE_PURCHASE_ORDER);
             }*/
         //  editModes.add(InvoiceEditMode.ALLOW_CLOSE_PURCHASE_ORDER);
         // }
 
         //FIXME hjs: alter to restrict what AP shouldn't be allowed to edit
         if (canEditPreExtraction(invoiceDocument)) {
             editModes.add(InvoiceEditMode.EDIT_PRE_EXTRACT);
         }
 
         // See if purap tax is enabled
         boolean salesTaxInd = SpringContext.getBean(ParameterService.class).getParameterValueAsBoolean(OleParameterConstants.PURCHASING_DOCUMENT.class, PurapParameterConstants.ENABLE_SALES_TAX_IND);
         if (salesTaxInd) {
             editModes.add(InvoiceEditMode.PURAP_TAX_ENABLED);
 
             if (invoiceDocument.isUseTaxIndicator()) {
                 // if use tax, don't allow editing of tax fields
                 editModes.add(InvoiceEditMode.LOCK_TAX_AMOUNT_ENTRY);
             } else {
                 // display the "clear all taxes" button if doc is not using use tax
                 editModes.add(InvoiceEditMode.CLEAR_ALL_TAXES);
 
             }
         }
 
         // tax area tab is editable while waiting for tax review
         if (invoiceDocument.isDocumentStoppedInRouteNode(InvoiceStatuses.NODE_VENDOR_TAX_REVIEW)) {
             editModes.add(InvoiceEditMode.TAX_AREA_EDITABLE);
         }
 
         if (PurchaseOrderStatuses.APPDOC_AWAIT_TAX_REVIEW
                 .equals(invoiceDocument.getApplicationDocumentStatus())) {
             editModes.add(InvoiceEditMode.TAX_AREA_EDITABLE);
         }
 
 
         // the tax tab is viewable to everyone after tax is approved
         if (InvoiceStatuses.APPDOC_DEPARTMENT_APPROVED.equals(invoiceDocument.getApplicationDocumentStatus()) &&
                 // if and only if the invoice has gone through tax review would TaxClassificationCode be non-empty
                 !StringUtils.isEmpty(invoiceDocument.getTaxClassificationCode())) {
             editModes.add(InvoiceEditMode.TAX_INFO_VIEWABLE);
         }
 
         if (invoiceDocument.isDocumentStoppedInRouteNode(InvoiceStatuses.NODE_ACCOUNT_REVIEW)) {
             // remove FULL_ENTRY because FO cannot edit rest of doc; only their own acct lines
             editModes.add(InvoiceEditMode.RESTRICT_FISCAL_ENTRY);
 
             // only do line item check if the hold/cancel indicator is false, otherwise document editing should be turned off.
             if (!invoiceDocument.isHoldIndicator() && !invoiceDocument.isInvoiceCancelIndicator()) {
                 List lineList = new ArrayList();
                 for (Iterator iter = invoiceDocument.getItems().iterator(); iter.hasNext(); ) {
                     InvoiceItem item = (InvoiceItem) iter.next();
                     lineList.addAll(item.getSourceAccountingLines());
                     // If FO has deleted the last accounting line for an item, set entry mode to full so they can add another one
                     if (item.getItemType().isLineItemIndicator() && item.getSourceAccountingLines().size() == 0) {
                         editModes.add(OleAuthorizationConstants.TransactionalEditMode.EXPENSE_ENTRY);
                     }
                 }
             }
         }
 
         // Remove editBank edit mode if the document has been extracted
         if (invoiceDocument.isExtracted()) {
             editModes.remove(OLEConstants.BANK_ENTRY_EDITABLE_EDITING_MODE);
         }
 
         return editModes;
     }
 
     protected boolean canProcessorInit(InvoiceDocument invoiceDocument) {
         // if Payment Request is in INITIATE status or NULL returned from getAppDocStatus
         String status = invoiceDocument.getApplicationDocumentStatus();
         if (StringUtils.equals(status, InvoiceStatuses.APPDOC_INITIATE)) {
             return true;
         }
         return false;
     }
 
 
     protected boolean canProcessorCancel(InvoiceDocument invoiceDocument) {
         // if Payment Request is in INITIATE status, user cannot cancel doc
         if (canProcessorInit(invoiceDocument)) {
             return false;
         }
 
         String docStatus = invoiceDocument.getApplicationDocumentStatus();
         boolean requestCancelIndicator = invoiceDocument.getInvoiceCancelIndicator();
         boolean holdIndicator = invoiceDocument.isHoldIndicator();
         boolean extracted = invoiceDocument.isExtracted();
 
         boolean preroute =
                 InvoiceStatuses.APPDOC_IN_PROCESS.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AWAITING_ACCOUNTS_PAYABLE_REVIEW.equals(docStatus);
         boolean enroute =
                 InvoiceStatuses.APPDOC_AWAITING_SUB_ACCT_MGR_REVIEW.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AWAITING_FISCAL_REVIEW.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AWAITING_ORG_REVIEW.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AWAITING_PAYMENT_REVIEW.equals(docStatus)
                         ||
                         InvoiceStatuses.APPDOC_AWAITING_TAX_REVIEW.equals(docStatus);
         boolean postroute =
                 InvoiceStatuses.APPDOC_DEPARTMENT_APPROVED.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AUTO_APPROVED.equals(docStatus);
 
         boolean can = false;
         if (InvoiceStatuses.STATUSES_PREROUTE.contains(docStatus)) {
             can = true;
         } else if (InvoiceStatuses.STATUSES_ENROUTE.contains(docStatus)) {
             can = requestCancelIndicator;
         } else if (InvoiceStatuses.STATUSES_POSTROUTE.contains(docStatus)) {
             can = !requestCancelIndicator && !holdIndicator && !extracted;
         }
 
         return can;
     }
 
     protected boolean canManagerCancel(InvoiceDocument invoiceDocument) {
         // if Payment Request is in INITIATE status, user cannot cancel doc
         if (canProcessorInit(invoiceDocument)) {
             return false;
         }
 
         String docStatus = invoiceDocument.getApplicationDocumentStatus();
         boolean requestCancelIndicator = invoiceDocument.getInvoiceCancelIndicator();
         boolean holdIndicator = invoiceDocument.isHoldIndicator();
         boolean extracted = invoiceDocument.isExtracted();
 
         boolean preroute =
                 InvoiceStatuses.APPDOC_IN_PROCESS.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AWAITING_ACCOUNTS_PAYABLE_REVIEW.equals(docStatus);
         boolean enroute =
                 InvoiceStatuses.APPDOC_AWAITING_SUB_ACCT_MGR_REVIEW.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AWAITING_FISCAL_REVIEW.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AWAITING_ORG_REVIEW.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AWAITING_PAYMENT_REVIEW.equals(docStatus)
                         ||
                         InvoiceStatuses.APPDOC_AWAITING_TAX_REVIEW.equals(docStatus);
         boolean postroute =
                 InvoiceStatuses.APPDOC_DEPARTMENT_APPROVED.equals(docStatus) ||
                         InvoiceStatuses.APPDOC_AUTO_APPROVED.equals(docStatus);
 
         boolean can = false;
         if (InvoiceStatuses.STATUSES_PREROUTE.contains(docStatus) ||
                 InvoiceStatuses.STATUSES_ENROUTE.contains(docStatus)) {
             can = true;
         } else if (InvoiceStatuses.STATUSES_POSTROUTE.contains(docStatus)) {
             can = !requestCancelIndicator && !holdIndicator && !extracted;
         }
 
         return can;
     }
 
     /**
      * Determines whether the Invoice Hold button shall be available. Conditions:
      * - Payment Request is not already on hold, and
      * - Payment Request is not already being requested to be canceled, and
      * - Payment Request has not already been extracted to PDP, and
      * - Payment Request status is not in the list of "STATUSES_DISALLOWING_HOLD" or document is being adhoc routed; and
      *
      * @return True if the document state allows placing the Payment Request on hold.
      */
     protected boolean canHold(InvoiceDocument invoiceDocument) {
         if (canHold == null) {
 
             boolean can = !invoiceDocument.isHoldIndicator()
                     && !invoiceDocument.isInvoiceCancelIndicator()
                     && !invoiceDocument.isExtracted();
             if (can) {
                 can = SpringContext.getBean(FinancialSystemWorkflowHelperService.class)
                         .isAdhocApprovalRequestedForPrincipal(
                                 invoiceDocument.getFinancialSystemDocumentHeader().getWorkflowDocument(),
                                 GlobalVariables.getUserSession().getPrincipalId());
                 can = can
                         || !InvoiceStatuses.STATUSES_DISALLOWING_HOLD.contains(invoiceDocument
                         .getApplicationDocumentStatus());
             }
             canHold = can;
         }
 
         return canHold;
     }
 
     /**
      * Determines whether the Request Cancel Invoice button shall be available. Conditions:
      * - Payment Request is not already on hold, and
      * - Payment Request is not already being requested to be canceled, and
      * - Payment Request has not already been extracted to PDP, and
      * - Payment Request status is not in the list of "STATUSES_DISALLOWING_REQUEST_CANCEL" or document is being adhoc routed; and
      *
      * @return True if the document state allows placing the request that the Payment Request be canceled.
      */
     protected boolean canRequestCancel(InvoiceDocument invoiceDocument) {
         if (canRequestCancel == null) {
             boolean can = !invoiceDocument.isInvoiceCancelIndicator()
                     && !invoiceDocument.isHoldIndicator() && !invoiceDocument.isExtracted();
             if (can) {
                 can = SpringContext.getBean(FinancialSystemWorkflowHelperService.class)
                         .isAdhocApprovalRequestedForPrincipal(
                                 invoiceDocument.getFinancialSystemDocumentHeader().getWorkflowDocument(),
                                 GlobalVariables.getUserSession().getPrincipalId());
                 can = can
                         || !InvoiceStatuses.STATUSES_DISALLOWING_REQUEST_CANCEL.contains(invoiceDocument
                         .getApplicationDocumentStatus());
             }
             canRequestCancel = can;
         }
         return canRequestCancel;
     }
 
     /**
      * Determines whether the Remove Hold button shall be available. Conditions:
      * - the hold indicator is set to true
      * <p/>
      * Because the state of the Payment Request cannot be changed while the document is on hold,
      * we should not have to check the state of the document to remove the hold.
      * For example, the document should not be allowed to be approved or extracted while on hold.
      *
      * @return True if the document state allows removing the Payment Request from hold.
      */
     protected boolean canRemoveHold(InvoiceDocument invoiceDocument) {
         return invoiceDocument.isHoldIndicator();
     }
 
     /**
      * Determines whether the Remove Request Cancel button shall be available. Conditions:
      * - the request cancel indicator is set to true;  and
      * <p/>
      * Because the state of the Payment Request cannot be changed while the document is set to request cancel,
      * we should not have to check the state of the document to remove the request cancel.
      * For example, the document should not be allowed to be approved or extracted while set to request cancel.
      *
      * @return True if the document state allows removing a request that the Payment Request be canceled.
      */
     protected boolean canRemoveRequestCancel(InvoiceDocument invoiceDocument) {
         return invoiceDocument.isInvoiceCancelIndicator();
     }
 
     protected boolean canEditPreExtraction(InvoiceDocument invoiceDocument) {
         if (canEditPreExtraction == null) {
             boolean can = (!invoiceDocument.isExtracted()
                     && !SpringContext.getBean(FinancialSystemWorkflowHelperService.class)
                     .isAdhocApprovalRequestedForPrincipal(
                             invoiceDocument.getFinancialSystemDocumentHeader().getWorkflowDocument(),
                             GlobalVariables.getUserSession().getPrincipalId()) && !InvoiceStatuses.CANCELLED_STATUSES
                     .contains(invoiceDocument.getApplicationDocumentStatus()));
             canEditPreExtraction = can;
         }
         return canEditPreExtraction;
     }
 
 }