package org.kuali.student.lum.program.client.versions;

 import java.util.ArrayList;

 import java.util.List;

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

 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.mvc.DataModel;

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

 import org.kuali.student.common.ui.client.mvc.history.HistoryManager;

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

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

 import org.kuali.student.common.ui.client.widgets.KSButton;

 import org.kuali.student.common.ui.client.widgets.KSButtonAbstract.ButtonStyle;

 import org.kuali.student.common.ui.client.widgets.field.layout.button.ButtonLayout;

 import org.kuali.student.common.ui.client.widgets.field.layout.layouts.VerticalFieldLayout;

 import org.kuali.student.common.ui.client.widgets.search.SearchResultsTable;

 import org.kuali.student.core.assembly.data.LookupMetadata;

 import org.kuali.student.core.assembly.data.Metadata;

 import org.kuali.student.core.assembly.data.QueryPath;

 import org.kuali.student.core.search.dto.SearchParam;

 import org.kuali.student.core.search.dto.SearchRequest;

 import org.kuali.student.core.search.dto.SortDirection;

 import org.kuali.student.lum.common.client.widgets.AppLocations;

 import org.kuali.student.lum.program.client.ProgramConstants;

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

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

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

 import org.kuali.student.lum.program.client.ProgramRegistry;

 public class ProgramSelectVersionsView extends ViewComposite{

         private VerticalFieldLayout layout = new VerticalFieldLayout();

         private ButtonLayout buttons = new ButtonLayout();

         SearchResultsTable table = new SearchResultsTable();

         MetadataRpcServiceAsync metadataServiceAsync = GWT.create(MetadataRpcService.class);

         private ProgramVersionsController parent;

         private DataModel programModel;

         public ProgramSelectVersionsView(DataModel model, ProgramVersionsController controller,String name, Enum<?> viewType) {

                 super(controller, name, viewType);

                 this.initWidget(layout);

                 layout.addStyleName("selectVersions");

                 layout.addWidget(table);

                 layout.addButtonLayout(buttons);

                 parent = controller;

                 this.programModel = model;

                 layout.setLayoutTitle(SectionTitle.generateH2Title("Program Versions"));

                 layout.setInstructions("Select a version to view");

                 table.setMutipleSelect(false);

                 buttons.addButton(new KSButton("Select", new ClickHandler(){

                         @Override

                         public void onClick(ClickEvent event) {

                                 if(table.getSelectedIds().size() == 1){

                                         String id = table.getSelectedIds().get(0);

                                     ViewContext viewContext = parent.getViewContext();

                                     viewContext.setId(id);

                                     navigateToProgramView(viewContext);

                                 }

                         }

                 }));

                 buttons.addButton(new KSButton("Return to Selected Program", ButtonStyle.ANCHOR_LARGE_CENTERED, new ClickHandler(){

                         @Override

                         public void onClick(ClickEvent event) {

                             ViewContext viewContext = parent.getViewContext();

                             viewContext.setId((String)programModel.get(ProgramConstants.ID));

                             navigateToProgramView(viewContext);

                         }

                 }));

         }

         private void navigateToProgramView(ViewContext viewContext){

         ProgramRegistry.setCreateNew(true);

             switch (parent.getType()){

                         case MAJOR: HistoryManager.navigate(AppLocations.Locations.VIEW_PROGRAM.getLocation(), viewContext); break;

                         case CORE: HistoryManager.navigate(AppLocations.Locations.VIEW_CORE_PROGRAM.getLocation(), viewContext); break;

                         case CREDENTIAL: HistoryManager.navigate(AppLocations.Locations.VIEW_BACC_PROGRAM.getLocation(), viewContext); break;

             }

         }

         @Override

         public void beforeShow(final Callback<Boolean> onReadyCallback) {

             Metadata searchMetadata = programModel.getDefinition().getMetadata(QueryPath.concat("searchProgramVersions"));

                 LookupMetadata versionSearch = searchMetadata.getInitialLookup();

                 table.performSearch(generateRequest(versionSearch), versionSearch.getResults(), versionSearch.getResultReturnKey(), false);

             onReadyCallback.exec(true);

         }

         private SearchRequest generateRequest(LookupMetadata versionSearch){

             SearchRequest sr = new SearchRequest();

         List<SearchParam> params = new ArrayList<SearchParam>();

         SearchParam param = new SearchParam();

         param.setKey("lu.queryParam.cluVersionIndId");

         String versionIndId = programModel.get(ProgramConstants.VERSION_IND_ID);

         versionIndId = (versionIndId == null ? "":versionIndId);

         param.setValue(versionIndId);

         params.add(param);

         sr.setSortDirection(SortDirection.DESC);

         sr.setParams(params);

         sr.setSearchKey(versionSearch.getSearchTypeId());

         if (versionSearch.getResultSortKey() != null) {

             sr.setSortColumn(versionSearch.getResultSortKey());

         }

         return sr;

         }

 }