/**
    * This file Copyright (c) 2010-2015 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.contentapp.movedialog;
  
  import info.magnolia.context.MgnlContext;
  import info.magnolia.event.EventBus;
  import info.magnolia.event.ResettableEventBus;
  import info.magnolia.event.SimpleEventBus;
  import info.magnolia.i18nsystem.I18nizer;
  import info.magnolia.i18nsystem.SimpleTranslator;
  import info.magnolia.objectfactory.ComponentProvider;
  import info.magnolia.ui.api.action.ActionDefinition;
  import info.magnolia.ui.api.action.ConfiguredActionDefinition;
  import info.magnolia.ui.api.app.AppContext;
  import info.magnolia.ui.api.overlay.OverlayLayer.ModalityLevel;
  import info.magnolia.ui.contentapp.DefinitionCloner;
  import info.magnolia.ui.contentapp.browser.BrowserSubAppDescriptor;
  import info.magnolia.ui.contentapp.field.WorkbenchField;
  import info.magnolia.ui.contentapp.movedialog.action.MoveCancelledAction;
  import info.magnolia.ui.contentapp.movedialog.action.MoveNodeActionDefinition;
  import info.magnolia.ui.contentapp.movedialog.predicate.MoveAfterPossibilityPredicate;
  import info.magnolia.ui.contentapp.movedialog.predicate.MoveBeforePossibilityPredicate;
  import info.magnolia.ui.contentapp.movedialog.predicate.MoveInsidePossibilityPredicate;
  import info.magnolia.ui.contentapp.movedialog.predicate.MovePossibilityPredicate;
  import info.magnolia.ui.dialog.BaseDialogPresenter;
  import info.magnolia.ui.dialog.DialogCloseHandler;
  import info.magnolia.ui.dialog.DialogView;
  import info.magnolia.ui.dialog.actionarea.DialogActionExecutor;
  import info.magnolia.ui.dialog.actionarea.definition.ConfiguredEditorActionAreaDefinition;
  import info.magnolia.ui.dialog.definition.ConfiguredDialogDefinition;
  import info.magnolia.ui.dialog.definition.DialogDefinition;
  import info.magnolia.ui.dialog.definition.SecondaryActionDefinition;
  import info.magnolia.ui.framework.overlay.ViewAdapter;
  import info.magnolia.ui.imageprovider.definition.ConfiguredImageProviderDefinition;
  import info.magnolia.ui.vaadin.dialog.BaseDialog;
  import info.magnolia.ui.vaadin.integration.NullItem;
  import info.magnolia.ui.vaadin.integration.contentconnector.ContentConnector;
  import info.magnolia.ui.vaadin.integration.contentconnector.JcrContentConnector;
  import info.magnolia.ui.vaadin.integration.jcr.JcrNodeAdapter;
  import info.magnolia.ui.workbench.WorkbenchPresenter;
  import info.magnolia.ui.workbench.column.definition.ColumnDefinition;
  import info.magnolia.ui.workbench.definition.ConfiguredWorkbenchDefinition;
  import info.magnolia.ui.workbench.definition.ContentPresenterDefinition;
  import info.magnolia.ui.workbench.tree.MoveHandler;
  import info.magnolia.ui.workbench.tree.MoveLocation;
  import info.magnolia.ui.workbench.tree.TreePresenter;
  import info.magnolia.ui.workbench.tree.drop.DropConstraint;
  
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Set;
  
  import javax.inject.Inject;
  import javax.jcr.RepositoryException;
  
  import com.vaadin.data.Item;
  import com.vaadin.data.Property.ValueChangeEvent;
  import com.vaadin.data.Property.ValueChangeListener;
  
  /**
   * Implementation of {@link MoveDialogPresenter}.
   */
  public class MoveDialogPresenterImpl extends BaseDialogPresenter implements MoveDialogPresenter {
 
     private final DialogView dialogView;
 
     private final EventBus eventBus = new ResettableEventBus(new SimpleEventBus());
 
     private final WorkbenchPresenter workbenchPresenter;
 
     private final AppContext appContext;
 
     private final I18nizer i18nizer;
 
     private final ContentConnector contentConnector;
 
     private final MoveHandler dropHandler;
 
     private final DefinitionCloner cloner;
 
     private final Map<MoveLocation, ActionDefinition> actionMap = new HashMap<>();
 
     private final Map<MoveLocation, MovePossibilityPredicate> possibilityPredicates = new HashMap<>();
 
     private List<Item> nodesToMove;
 
     private DropConstraint constraint;
 
     private MoveActionCallback callback;
 
     private Item currentHostCandidate;
 
     private ConfiguredWorkbenchDefinition workbenchDefinition;
 
     @Inject
     public MoveDialogPresenterImpl(ComponentProvider componentProvider, DialogView dialogView, WorkbenchPresenter workbenchPresenter, DialogActionExecutor executor, AppContext appContext, I18nizer i18nizer, SimpleTranslator simpleTranslator, ContentConnector contentConnector) {
         super(componentProvider, executor, dialogView, i18nizer, simpleTranslator);
         this.dialogView = dialogView;
         this.workbenchPresenter = workbenchPresenter;
         this.appContext = appContext;
         this.i18nizer = i18nizer;
         this.contentConnector = contentConnector;
         this.dropHandler = componentProvider.newInstance(MoveHandler.class);
         this.cloner = new DefinitionCloner();
     }
 
     @Override
     public Object[] getActionParameters(String actionName) {
         return new Object[] { nodesToMove, callback, appContext, getHostCandidate(), dropHandler };
     }
 
     @Override
     public DialogView start(BrowserSubAppDescriptor subAppDescriptor, List<Item> nodesToMove, MoveActionCallback callback) {
 
         final ConfiguredImageProviderDefinition imageProviderDefinition = prepareImageProviderDefinition(subAppDescriptor);
         this.workbenchDefinition = prepareWorkbenchDefinition(subAppDescriptor);
 
         this.nodesToMove = nodesToMove;
         this.constraint = componentProvider.newInstance(workbenchDefinition.getDropConstraintClass());
         this.callback = callback;
 
         initActions();
         initMovePossibilityPredicates();
 
         final WorkbenchField field = new WorkbenchField(
                 workbenchDefinition,
                 imageProviderDefinition,
                 workbenchPresenter,
                 eventBus);
         ViewAdapter viewAdapter = new ViewAdapter(field);
         viewAdapter.asVaadinComponent().addStyleName("choose-dialog");
         dialogView.setContent(viewAdapter);
         field.addValueChangeListener(new ValueChangeListener() {
             @Override
             public void valueChange(ValueChangeEvent event) {
                 currentHostCandidate = contentConnector.getItem(event.getProperty().getValue());
                 updatePossibleMoveLocations(currentHostCandidate);
 
             }
         });
 
         DialogDefinition dialogDefinition = prepareDialogDefinition();
         getExecutor().setDialogDefinition(dialogDefinition);
         dialogView.setCaption(dialogDefinition.getLabel());
         dialogView.addDialogCloseHandler(new DialogCloseHandler() {
             @Override
             public void onDialogClose(DialogView dialogView) {
                 ((ResettableEventBus) eventBus).reset();
             }
         });
         super.start(dialogDefinition, appContext);
         updatePossibleMoveLocations(getHostCandidate());
 
         getView().getActionAreaView().getViewForAction(MoveLocation.INSIDE.name()).asVaadinComponent().addStyleName("commit");
         getView().setClosable(true);
         return dialogView;
     }
 
     private ConfiguredImageProviderDefinition prepareImageProviderDefinition(BrowserSubAppDescriptor subAppDescriptor) {
         return (ConfiguredImageProviderDefinition) cloner.deepClone(subAppDescriptor.getImageProvider());
     }
 
     private ConfiguredWorkbenchDefinition prepareWorkbenchDefinition(BrowserSubAppDescriptor subAppDescriptor) {
         final ConfiguredWorkbenchDefinition workbenchDefinition =
                 (ConfiguredWorkbenchDefinition) cloner.deepClone(subAppDescriptor.getWorkbench());
 
         workbenchDefinition.setDialogWorkbench(true);
         workbenchDefinition.setEditable(false);
 
         List<ContentPresenterDefinition> contentPresenters = workbenchDefinition.getContentViews();
         Iterator<ContentPresenterDefinition> it = contentPresenters.iterator();
         ContentPresenterDefinition treePresenterDef = null;
         while (it.hasNext() && treePresenterDef == null) {
             ContentPresenterDefinition contentPresenterDef = it.next();
             if (TreePresenter.class.isAssignableFrom(contentPresenterDef.getImplementationClass())) {
                 treePresenterDef = prepareTreePresenter(contentPresenterDef);
             }
         }
 
         if (treePresenterDef != null) {
             contentPresenters.clear();
             contentPresenters.add(treePresenterDef);
         }
 
         return workbenchDefinition;
     }
 
     private ContentPresenterDefinition prepareTreePresenter(ContentPresenterDefinition treePresenter) {
         ContentPresenterDefinition def = cloner.deepClone(treePresenter);
         if (!def.getColumns().isEmpty()) {
             ColumnDefinition column = def.getColumns().get(0);
             def.getColumns().clear();
             def.getColumns().add(column);
         }
         return def;
     }
 
     protected void initMovePossibilityPredicates() {
         possibilityPredicates.put(MoveLocation.AFTER, new MoveAfterPossibilityPredicate(constraint, nodesToMove));
         possibilityPredicates.put(MoveLocation.BEFORE, new MoveBeforePossibilityPredicate(constraint, nodesToMove));
         possibilityPredicates.put(MoveLocation.INSIDE, new MoveInsidePossibilityPredicate(constraint, nodesToMove));
     }
 
     protected void updatePossibleMoveLocations(Item possibleHost) {
         Set<MoveLocation> possibleLocations = new HashSet<MoveLocation>();
         if (possibleHost == null) {
             possibleHost = new NullItem();
         }
 
         Iterator<Entry<MoveLocation, MovePossibilityPredicate>> it = possibilityPredicates.entrySet().iterator();
         while (it.hasNext()) {
             Entry<MoveLocation, MovePossibilityPredicate> entry = it.next();
             if (entry.getValue().isMovePossible(possibleHost)) {
                 possibleLocations.add(entry.getKey());
             }
         }
 
         getActionArea().setPossibleMoveLocations(possibleLocations);
     }
 
     private void initActions() {
         for (MoveLocation location : MoveLocation.values()) {
             ConfiguredActionDefinition definition = i18nizer.decorate(new MoveNodeActionDefinition(location));
             definition.setName(location.name());
             actionMap.put(location, definition);
         }
     }
 
     private DialogDefinition prepareDialogDefinition() {
         ConfiguredDialogDefinition def = new ConfiguredDialogDefinition();
         def = i18nizer.decorate(def);
         def.setId("ui-contentapp:code:MoveDialogPresenterImpl.moveDialog");
 
         for (MoveLocation location : MoveLocation.values()) {
             def.addAction(actionMap.get(location));
         }
 
         ConfiguredActionDefinition cancelDef = new ConfiguredActionDefinition();
         cancelDef.setName("cancel");
         cancelDef.setImplementationClass(MoveCancelledAction.class);
         def.addAction(cancelDef);
 
         ConfiguredEditorActionAreaDefinition actionAreaDefinition = new ConfiguredEditorActionAreaDefinition();
         actionAreaDefinition.setPresenterClass(MoveDialogActionAreaPresenter.class);
 
         List<SecondaryActionDefinition> secondaryActions = new LinkedList<SecondaryActionDefinition>();
         secondaryActions.add(new SecondaryActionDefinition(MoveLocation.AFTER.name()));
         secondaryActions.add(new SecondaryActionDefinition(MoveLocation.BEFORE.name()));
         actionAreaDefinition.setSecondaryActions(secondaryActions);
 
         def.setActionArea(actionAreaDefinition);
         def.setModalityLevel(ModalityLevel.LIGHT);
         return def;
     }
 
     @Override
     public MoveDialogActionAreaPresenter getActionArea() {
         return (MoveDialogActionAreaPresenter) super.getActionArea();
     }
 
     @Override
     protected DialogActionExecutor getExecutor() {
         return (DialogActionExecutor) super.getExecutor();
     }
 
     @Override
     protected void executeAction(String actionName, Object[] actionContextParams) {
         actionName = getCorrectActionName(actionName);
         if (actionName != null) {
             super.executeAction(actionName, actionContextParams);
         }
     }
 
     public String getCorrectActionName(String actionName) {
         if (actionName.equals(BaseDialog.COMMIT_ACTION_NAME)) {
             boolean moveInsideActionEnabled = getView().getActionAreaView().getViewForAction(MoveLocation.INSIDE.name()).asVaadinComponent().isEnabled();
             actionName = moveInsideActionEnabled ? MoveLocation.INSIDE.name() : null;
         }
         return actionName;
     }
 
     private Item getHostCandidate() {
         if (currentHostCandidate != null) {
             return currentHostCandidate;
         } else {
             try {
                 String workspace = ((JcrContentConnector) contentConnector).getContentConnectorDefinition().getWorkspace();
                 return new JcrNodeAdapter(MgnlContext.getJCRSession(workspace).getRootNode());
             } catch (RepositoryException e) {
                 return null;
             }
         }
     }
 
     @Override
     protected void onCancel () {
         if (callback != null) {
             callback.onMoveCancelled();
         }
     }
 }