package org.kuali.student.common.ui.client.widgets.documenttool;

 import java.util.ArrayList;

 import java.util.List;

 import org.kuali.student.common.ui.client.application.KSAsyncCallback;

 import org.kuali.student.common.ui.client.configurable.mvc.SectionTitle;

 import org.kuali.student.common.ui.client.mvc.Callback;

 import org.kuali.student.common.ui.client.service.DocumentRpcService;

 import org.kuali.student.common.ui.client.service.DocumentRpcServiceAsync;

 import org.kuali.student.common.ui.client.widgets.field.layout.element.AbbrButton;

 import org.kuali.student.common.ui.client.widgets.field.layout.element.AbbrButton.AbbrButtonType;

 import org.kuali.student.core.document.dto.RefDocRelationInfo;

 import org.kuali.student.core.dto.StatusInfo;

 import com.google.gwt.core.client.GWT;

 import com.google.gwt.dom.client.Style;

 import com.google.gwt.event.dom.client.ClickEvent;

 import com.google.gwt.event.dom.client.ClickHandler;

 import com.google.gwt.user.client.ui.Composite;

 import com.google.gwt.user.client.ui.FlexTable;

 import com.google.gwt.user.client.ui.HTML;

 public class DocumentList extends Composite{

         private DocumentRpcServiceAsync documentServiceAsync = GWT.create(DocumentRpcService.class);

     private FlexTable tableLayout = new FlexTable();

     private List<RefDocRelationInfo> docInfos;

     private Callback<String> deleteCallback;

     private boolean canDelete = false;

     private boolean showDesc = true;

     private boolean showTitle = true;

     private String refObjectType;

     public DocumentList(String refObjectType, boolean showTitle, boolean showDesc) {

             this.showTitle = showTitle;

             this.showDesc = showDesc;

             this.refObjectType = refObjectType;

         this.initWidget(tableLayout);

     }

     public DocumentList(String refObjectType, List<RefDocRelationInfo> docInfos, boolean showTitle, boolean showDesc) {

             this.showTitle = showTitle;

             this.showDesc = showDesc;

             this.refObjectType = refObjectType;

         setDocInfos(docInfos);

         this.initWidget(tableLayout);

     }

     public DocumentList(String refObjectType, List<RefDocRelationInfo> docInfos,

                         Callback<String> deleteCallback) {

             canDelete = true;

             this.refObjectType = refObjectType;

             this.deleteCallback = deleteCallback;

         setDocInfos(docInfos);

         this.initWidget(tableLayout);

         }

         public void getAndSetDocInfos(String id){

                 documentServiceAsync.getRefDocIdsForRef(refObjectType, id, new KSAsyncCallback<List<RefDocRelationInfo>>(){

                         @Override

                         public void handleFailure(Throwable caught) {

                                 GWT.log("getRefDocIdsForRef failed", caught);

                                 setDocInfos(null);

                         }

                         @Override

                         public void onSuccess(List<RefDocRelationInfo> result) {

                                 setDocInfos(result);

                         }

                 });

     }

     public void setDocInfos(List<RefDocRelationInfo> docInfos) {

         this.docInfos = docInfos;

         redraw();

     }

     public void add(RefDocRelationInfo docInfo) {

         docInfos = (docInfos == null)? new ArrayList<RefDocRelationInfo>() :

             docInfos;

         docInfos.add(docInfo);

         redraw();

     }

     private void redraw() {

         tableLayout.clear();

         if (docInfos != null) {

             int rowIndex = 0;

             for (final RefDocRelationInfo docInfo : docInfos) {

                 HTML name = new HTML("No file exists");

                 HTML documentText = new HTML();

                 int columnIndex = 0;

                 // display header

                 if (rowIndex == 0 && showTitle) {

                     StringBuilder titleTextSb = new StringBuilder();

                     titleTextSb.append("Attached Documents (").append(docInfos.size()).append(")");

                     SectionTitle uploadedFileSectionHeader = SectionTitle.generateH3Title(titleTextSb.toString());

                     uploadedFileSectionHeader.getElement().getStyle().setProperty("borderBottom", "1px solid #D8D8D8");

                     tableLayout.setWidget(rowIndex, columnIndex, uploadedFileSectionHeader);

                     tableLayout.getFlexCellFormatter().setColSpan(rowIndex, columnIndex, 3);

                     rowIndex++;

                 }

                 tableLayout.setWidget(rowIndex, columnIndex, name);

                 name.setHTML("<a href=\"" + GWT.getModuleBaseURL()+"rpcservices/DocumentUpload?docId=" + docInfo.getDocumentId() + "\" target=\"_blank\"><b>" + docInfo.getTitle() + "</b></a>");

                 name.getElement().getStyle().setPaddingRight(20d, Style.Unit.PX);

                 tableLayout.setWidget(rowIndex, columnIndex, name);

                 columnIndex++;

                 if(showDesc){

                         documentText.setHTML(docInfo.getDesc().getPlain());

                         documentText.getElement().getStyle().setPaddingRight(20d, Style.Unit.PX);

                         tableLayout.setWidget(rowIndex, columnIndex, documentText);

                         columnIndex++;

                 }

                 if(canDelete){

                         AbbrButton delete = new AbbrButton(AbbrButtonType.DELETE);

                         tableLayout.setWidget(rowIndex, columnIndex, delete);

                         delete.addClickHandler(new ClickHandler(){

                             @Override

                             public void onClick(ClickEvent event) {

                                  try {

                                      //TODO Reviewed in M6, future fix: this will fail if the document does not exist BUT the relation does, needs a check for existance

                                      //before delete

                                          documentServiceAsync.deleteRefDocRelationAndOrphanedDoc(docInfo.getId(), docInfo.getDocumentId(), new KSAsyncCallback<StatusInfo>(){

                                         @Override

                                         public void onSuccess(StatusInfo result) {

                                                 deleteCallback.exec(result.toString());

                                         }

                                     });

                                 } catch (Exception e) {

                                     GWT.log("deleteRefDocRelationAndOrphanedDoc failed", e);

                                 }

                             }

                         });

                 }

                 rowIndex++;

             }

         }

     }

 }