/**
    * This file Copyright (c) 2010-2018 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 static java.util.stream.Collectors.toList;
  
  import info.magnolia.config.MutableWrapper;
  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.api.view.View;
  import info.magnolia.ui.contentapp.browser.BrowserSubAppDescriptor;
  import info.magnolia.ui.contentapp.movedialog.action.MoveCancelledAction;
  import info.magnolia.ui.contentapp.movedialog.action.MoveNodeActionDefinition;
  import info.magnolia.ui.dialog.BaseDialogPresenter;
  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.imageprovider.definition.ImageProviderDefinition;
  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.ContentPresenterDefinition;
  import info.magnolia.ui.workbench.definition.ContentPresenterDefinitionMutator;
  import info.magnolia.ui.workbench.definition.WorkbenchDefinition;
  import info.magnolia.ui.workbench.definition.WorkbenchDefinitionMutator;
  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.AlwaysTrueDropConstraint;
  import info.magnolia.ui.workbench.tree.drop.DropConstraint;
  import info.magnolia.ui.workbench.tree.drop.JcrDropConstraint;
  
  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.Set;
  
  import javax.inject.Inject;
  import javax.jcr.RepositoryException;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.v7.data.Item;
  import com.vaadin.v7.data.Property.ValueChangeListener;
  
  /**
   * Implementation of {@link MoveDialogPresenter}.
   */
 public class MoveDialogPresenterImpl extends BaseDialogPresenter implements MoveDialogPresenter {
 
     private static final Logger log = LoggerFactory.getLogger(MoveDialogPresenterImpl.class);
 
     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 Map<MoveLocation, ActionDefinition> actionMap = new HashMap<>();
 
     private List<Item> nodesToMove;
 
     private DropConstraint constraint;
 
     private MoveActionCallback callback;
 
     private Item currentHostCandidate;
 
     private WorkbenchDefinition 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);
     }
 
     @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) {
         if (nodesToMove.isEmpty()) {
             throw new IllegalArgumentException("Nodes to be moved cannot be empty.");
         }
 
         final ImageProviderDefinition imageProviderDefinition = prepareImageProviderDefinition(subAppDescriptor);
         this.workbenchDefinition = prepareWorkbenchDefinition(subAppDescriptor);
 
         this.nodesToMove = nodesToMove;
 
         // In case dropConstraint class does not exist, set the AlwaysTrueDropConstraint by default
         Class<? extends DropConstraint> dropConstraintClass = workbenchDefinition.getDropConstraintClass();
         if (dropConstraintClass == null) {
             dropConstraintClass = contentConnector instanceof JcrContentConnector ? JcrDropConstraint.class : AlwaysTrueDropConstraint.class;
         }
 
         this.constraint = componentProvider.newInstance(dropConstraintClass);
 
         this.callback = callback;
 
         initActions();
 
         final MoveDialogWorkbenchField field = new MoveDialogWorkbenchField(
                 workbenchDefinition,
                 imageProviderDefinition,
                 workbenchPresenter,
                 eventBus);
 
         field.addStyleName("choose-dialog");
         field.setSizeFull();
 
         dialogView.setContent((View) () -> field);
         field.addValueChangeListener((ValueChangeListener) event -> {
             currentHostCandidate = contentConnector.getItem(event.getProperty().getValue());
             updatePossibleMoveLocations(currentHostCandidate);
 
         });
 
         DialogDefinition dialogDefinition = prepareDialogDefinition();
         getExecutor().setDialogDefinition(dialogDefinition);
         dialogView.setCaption(dialogDefinition.getLabel());
         dialogView.addDialogCloseHandler(dialogView1 -> ((ResettableEventBus) eventBus).reset());
         super.start(dialogDefinition, appContext);
 
         Object firstItemId = contentConnector.getItemId(nodesToMove.get(0));
         field.setValue(firstItemId);
 
         List<Object> movingItemIds = nodesToMove.stream().map(contentConnector::getItemId).collect(toList());
         field.markMovingItem(movingItemIds);
 
         getView().getActionAreaView().getViewForAction(MoveLocation.INSIDE.name()).asVaadinComponent().addStyleName("commit");
         getView().setClosable(true);
         return dialogView;
     }
 
     private ImageProviderDefinition prepareImageProviderDefinition(BrowserSubAppDescriptor subAppDescriptor) {
         return MutableWrapper.wrap(subAppDescriptor.getImageProvider());
     }
 
     private WorkbenchDefinition prepareWorkbenchDefinition(BrowserSubAppDescriptor subAppDescriptor) {
         final WorkbenchDefinition workbenchDefinition = MutableWrapper.wrap(subAppDescriptor.getWorkbench());
 
         List<ContentPresenterDefinition> contentViews = workbenchDefinition.getContentViews();
 
         for (ContentPresenterDefinition contentPresenter : contentViews) {
             if (TreePresenter.class.isAssignableFrom(contentPresenter.getImplementationClass())) {
                 ContentPresenterDefinitionMutator.accessMutable(contentPresenter).setImplementationClass(MoveDialogTreePresenterWrapper.class);
             }
         }
 
         WorkbenchDefinitionMutator.accessMutable(workbenchDefinition)
                 .setDialogWorkbench(true)
                 .setEditable(false);
 
         for (ContentPresenterDefinition contentPresenter : workbenchDefinition.getContentViews()) {
             removeAllColumnsAfterFirst(contentPresenter);
         }
 
         return workbenchDefinition;
     }
 
     private void removeAllColumnsAfterFirst(ContentPresenterDefinition contentPresenter) {
         if (!contentPresenter.getColumns().isEmpty()) {
             ColumnDefinition column = contentPresenter.getColumns().get(0);
             contentPresenter.getColumns().clear();
             contentPresenter.getColumns().add(column);
         }
     }
 
     /**
      * @deprecated since 5.5.5, MovePossibilityPredicates have been unified and replaced with DropConstraints.
      */
     @Deprecated
     protected void initMovePossibilityPredicates() {
         log.warn("initMovePossibilityPredicates function is deprecated since 5.5.5 ,MovePossibilityPredicates have been unified and replaced with DropConstraints.");
     }
 
     protected void updatePossibleMoveLocations(Item possibleHost) {
         Set<MoveLocation> possibleLocations = new HashSet<>();
         if (possibleHost == null) {
             possibleHost = new NullItem();
         }
 
         for (MoveLocation location : MoveLocation.values()) {
             if (isMovePossible(possibleHost, location)) {
                 possibleLocations.add(location);
             }
         }
 
         getActionArea().setPossibleMoveLocations(possibleLocations);
     }
 
     private boolean isMovePossible(Item possibleHost, MoveLocation location) {
         Iterator<? extends Item> it = nodesToMove.iterator();
         boolean isPossible = true;
         while (it.hasNext() && isPossible) {
             Item item = it.next();
             switch (location) {
             case INSIDE:
                 isPossible &= constraint.allowedAsChild(item, possibleHost);
                 break;
             case BEFORE:
                 isPossible &= constraint.allowedBefore(item, possibleHost);
                 break;
             case AFTER:
                 isPossible &= constraint.allowedAfter(item, possibleHost);
                 break;
             default:
                 break;
             }
         }
         return isPossible;
     }
 
     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<>();
         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();
         }
     }
 }