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/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.editor.ui;

import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.activiti.explorer.ExplorerApp;
import org.activiti.explorer.I18nManager;
import org.activiti.explorer.Messages;
import org.activiti.explorer.ui.custom.PopupWindow;

import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Reindeer;


/**
 * @author Tijs Rademakers
 */
public class DeleteModelPopupWindow extends PopupWindow implements ModelDataJsonConstants {
  
  private static final long serialVersionUID = 1L;
  
  protected I18nManager i18nManager;
  protected VerticalLayout windowLayout;
  protected Model modelData;
  
  protected transient RepositoryService repositoryService = ProcessEngines.getDefaultProcessEngine().getRepositoryService();
  
  public DeleteModelPopupWindow(Model model) {
    this.modelData = model;
    this.windowLayout = (VerticalLayout) getContent();
    this.i18nManager = ExplorerApp.get().getI18nManager();
    
    initWindow();
    addDeleteWarning();
    addButtons();
  }
  
  protected void initWindow() {
    windowLayout.setSpacing(true);
    addStyleName(Reindeer.WINDOW_LIGHT);
    setModal(true);
    setWidth("300px");
    center();
    
    setCaption(i18nManager.getMessage(Messages.PROCESS_DELETE_POPUP_CAPTION, modelData.getName()));
  }
  
  protected void addDeleteWarning() {
    Label deleteLabel = new Label(i18nManager.getMessage(Messages.PROCESS_DELETE_POPUP_MESSAGE));
    deleteLabel.addStyleName(Reindeer.LABEL_SMALL);
    addComponent(deleteLabel);
    
    // Some empty space
    Label emptySpace = new Label(" ", Label.CONTENT_XHTML);
    addComponent(emptySpace);
  }
  
  protected void addButtons() {
    // Cancel
    Button cancelButton = new Button(i18nManager.getMessage(Messages.BUTTON_CANCEL));
    cancelButton.addStyleName(Reindeer.BUTTON_SMALL);
    cancelButton.addListener(new ClickListener() {
      
      private static final long serialVersionUID = 1L;
      
      public void buttonClick(ClickEvent event) {
        close();
      }
    });
    
    // Convert
    Button deleteButton = new Button(i18nManager.getMessage(Messages.PROCESS_DELETE_POPUP_DELETE_BUTTON));
    deleteButton.addStyleName(Reindeer.BUTTON_SMALL);
    deleteButton.addListener(new ClickListener() {
      
      private static final long serialVersionUID = 1L;

      public void buttonClick(ClickEvent event) {
        repositoryService.deleteModel(modelData.getId());
        close();
        ExplorerApp.get().getViewManager().showEditorProcessDefinitionPage();
      }
    });
    
    // Alignment
    HorizontalLayout buttonLayout = new HorizontalLayout();
    buttonLayout.setSpacing(true);
    buttonLayout.addComponent(cancelButton);
    buttonLayout.addComponent(deleteButton);
    addComponent(buttonLayout);
    windowLayout.setComponentAlignment(buttonLayout, Alignment.BOTTOM_RIGHT);
  }

}