EDIT

/**

* Copyright (C) 2018 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.vaadin.debug;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.util.Optional;

import org.apache.log4j.Logger;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.Profile;

import org.springframework.stereotype.Component;

import org.vaadin.spring.events.Event;

import org.vaadin.spring.events.EventBus;

import org.vaadin.spring.events.EventBus.UIEventBus;

import org.vaadin.spring.events.EventBusListener;

import com.vaadin.event.ShortcutAction;

import com.vaadin.event.ShortcutListener;

import com.vaadin.navigator.View;

import com.vaadin.navigator.ViewChangeListener;

import com.vaadin.spring.annotation.UIScope;

import com.vaadin.ui.UI;

import com.vaadin.ui.Window;

import eu.etaxonomy.cdm.vaadin.view.name.CachingPresenter;

import eu.etaxonomy.vaadin.mvp.AbstractCdmPopupEditor;

import eu.etaxonomy.vaadin.mvp.AbstractPresenter;

import eu.etaxonomy.vaadin.mvp.AbstractView;

import eu.etaxonomy.vaadin.ui.view.PopEditorOpenedEvent;

import eu.etaxonomy.vaadin.ui.view.PopupView;

/**

 * @author a.kohlbecker

 * @since Jan 22, 2018

 *

 */

@Component

@UIScope

@Profile("debug")

public class EntityCacheDebugger implements ViewChangeListener, EventBusListener<PopEditorOpenedEvent> {

    Logger logger = Logger.getLogger(EntityCacheDebugger.class);

    private UIEventBus uiEventBus;

    @Autowired

    protected final void setUIEventBus(EventBus.UIEventBus uiEventBus){

        this.uiEventBus = uiEventBus;

        uiEventBus.subscribe(this);

    }

    EntityCacheDebuggerShortcutListener shortcutListener;

    public EntityCacheDebugger(){

        shortcutListener = new EntityCacheDebuggerShortcutListener("Debug Entities",

                ShortcutAction.KeyCode.SPACEBAR,

                ShortcutAction.ModifierKey.CTRL);

    }

    public void openFor(AbstractView view){

        if(view != null){

                try {

                    AbstractPresenter presenter;

                    Method getPresenterMethod = AbstractView.class.getDeclaredMethod("getPresenter");

                    getPresenterMethod.setAccessible(true);

                    presenter = (AbstractPresenter) getPresenterMethod.invoke(view);

                    if(CachingPresenter.class.isAssignableFrom(presenter.getClass())){

                        open(view, (CachingPresenter)presenter);

                    } else {

                        logger.warn("can only operate on CachingPresenters");

                    }

                } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException

                        | InvocationTargetException e) {

                    logger.error(e);

                }

        } else {

            logger.warn("view is null");

        }

   }

    /**

     * @param view

     * @param presenter

     */

    private void open(AbstractView view, CachingPresenter presenter) {

        EntityCacheDebuggerComponent content = new EntityCacheDebuggerComponent(presenter);

        if(view instanceof AbstractCdmPopupEditor){

            findWindow((AbstractCdmPopupEditor)view).setModal(false);

        }

        Window window = new Window();

        window.setCaption("Entity Cache Debugger");

        window.setResizable(true);

        window.setModal(false);

        content.setSizeFull();

        window.setContent(content);

        window.setWidth("800px");

        window.setHeight("600px");

        UI.getCurrent().addWindow(window);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public boolean beforeViewChange(ViewChangeEvent event) {

        return true;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void afterViewChange(ViewChangeEvent event) {

        View newView = event.getNewView();

        if(newView instanceof AbstractView){

            ((AbstractView)newView).addShortcutListener(shortcutListener);

        }

        if(event.getOldView() instanceof AbstractView){

            ((AbstractView)event.getOldView()).removeShortcutListener(shortcutListener);

        }

    }

    @Override

    public void onEvent(Event<PopEditorOpenedEvent> event){

        PopupView popupView = event.getPayload().getPopupView();

        if(popupView != null && popupView instanceof AbstractCdmPopupEditor){

            findWindow(((AbstractCdmPopupEditor)popupView)).addShortcutListener(shortcutListener);

        }

    }

    private Window findWindow(AbstractCdmPopupEditor view){

        Optional<Window> popUpWindow = UI.getCurrent().getWindows().stream().filter(w -> w.getContent().equals(view)).findFirst();

        if(popUpWindow.isPresent()){

            return popUpWindow.get();

        } else {

            return null;

        }

    }

    /**

     * @return the shortcutListener

     */

    public EntityCacheDebuggerShortcutListener getShortcutListener() {

        return shortcutListener;

    }

    private class EntityCacheDebuggerShortcutListener extends ShortcutListener {

            private static final long serialVersionUID = -8727949764189908851L;

            /**

             * @param caption

             * @param keyCode

             * @param modifierKeys

             */

            public EntityCacheDebuggerShortcutListener(

                    String caption,

                    int keyCode,

                    int modifierKey) {

                super(caption, keyCode, new int[]{modifierKey});

            }

            public EntityCacheDebuggerShortcutListener(

                    String caption,

                    int keyCode) {

                super(caption, new int[]{keyCode});

            }

            @Override

            public void handleAction(Object sender, Object target) {

                if(sender instanceof AbstractView) {

                    EntityCacheDebugger.this.openFor((AbstractView)sender);

                }

                if(sender instanceof Window && ((Window)sender).getContent() instanceof AbstractCdmPopupEditor) {

                    EntityCacheDebugger.this.openFor((AbstractCdmPopupEditor)((Window)sender).getContent());

                }

            }

        };

}