/**
 * 
 */
package org.gcube.portlets.widgets.wsexplorer.client.load;

import java.util.ArrayList;
import java.util.List;

import org.gcube.portlets.widgets.wsexplorer.client.WorkspaceExplorerConstants;
import org.gcube.portlets.widgets.wsexplorer.client.WorkspaceExplorerController;
import org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.HasWorskpaceExplorerNotificationListener;
import org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.WorskpaceExplorerNotificationListener;
import org.gcube.portlets.widgets.wsexplorer.shared.Item;

import com.github.gwtbootstrap.client.ui.Modal;
import com.github.gwtbootstrap.client.ui.ModalFooter;
import com.github.gwtbootstrap.client.ui.event.HideEvent;
import com.github.gwtbootstrap.client.ui.event.HideHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;



/**
 * The Class WorkspaceExplorerLoadDialog.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * Jun 29, 2015
 * 
 * 
 */
public class WorkspaceExplorerLoadDialog extends Modal implements HasWorskpaceExplorerNotificationListener{

	private Button openButton;
	private WorkspaceExplorerLoadDialog INSTANCE = this;
	private boolean isSelect = false;
	private String captionTxt;
	private ModalFooter footer = new ModalFooter();
	private WorkspaceExplorerController controller = new WorkspaceExplorerController();
	private List<WorskpaceExplorerNotificationListener> listeners = new ArrayList<WorskpaceExplorerNotificationListener>();
	
	/**
	 * Instantiates a new worspace navigator dialog.
	 *
	 * @param captionTxt sets the text inside the caption, if null sets "Workspace Explorer"
	 * 
	 * Add {@link WorskpaceExplorerNotificationListener} to receive events
	 */
	public WorkspaceExplorerLoadDialog(String captionTxt) {
		this.captionTxt = (captionTxt==null || captionTxt.isEmpty())?WorkspaceExplorerConstants.WORKSPACE_EXPLORER_CAPTION:captionTxt;
//		setText(this.captionTxt);
		setAnimation(false);
		setCloseVisible(true);
		setTitle(this.captionTxt);
		openButton = new Button("Open");
		setWidth(710);
//		setHeight("650px");
		setMaxHeigth("500px");
		hide(false);
		
		addHideHandler(new HideHandler() {
			
			@Override
			public void onHide(HideEvent hideEvent) {
				if(!isSelect)
					notifyAborted();
			}
		});
		
//		DockPanel dock = new DockPanel();
//		dock.setSpacing(5);

		// dock.add(okButton, DockPanel.SOUTH);
		// dock.add(cancel, DockPanel.SOUTH);

//		HorizontalPanel hp = new HorizontalPanel();
//		hp.setStyleName("margin-auto");
//////		hp.add(okButton);
////		hp.setWidth("50%");
////		hp.setStyleAttribute("margin", "0 auto");
//		hp.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
//		cancel.getElement().getStyle().setMarginTop(5.0, Unit.PX);
////		cancel.getElement().getStyle().setMarginBottom(5.0, Unit.PX);
////		hp.getElement().getStyle().setMarginLeft("0 auto", Unit.PCT);
//		hp.add(cancel);
//		dock.add(hp, DockPanel.SOUTH);
//
//		dock.add(controller.getWorkspaceExplorerPanel(), DockPanel.CENTER);
//
//		dock.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
//		dock.setWidth("100%");
		add(controller.getWorkspaceExplorerPanel());

//		okButton.addClickHandler(new ClickHandler() {
//
//			@Override
//			public void onClick(ClickEvent event) {
//				
//			}
//		});
		openButton.addClickHandler(new ClickHandler() {

			@Override
			public void onClick(ClickEvent event) {
				isSelect = false;
				Item item = controller.getWsExplorer().getItemSelected();
				if(item!=null){
					isSelect = true;
					INSTANCE.hide();
					notifySelectedItem(item);
				}
					
			}
		});
		
		footer.add(openButton);
		
		add(footer);
	}
	
	/**
	 * Notify selected item.
	 *
	 * @param selected the selected
	 */
	private void notifySelectedItem(Item selected){
		
		for (WorskpaceExplorerNotificationListener worskpaceExplorerNotificationListener : listeners) {
			worskpaceExplorerNotificationListener.onSelectedItem(selected);
		}
	}
	
	/**
	 * Notify aborted.
	 *
	 * @param selected the selected
	 */
	private void notifyAborted(){
		
		for (WorskpaceExplorerNotificationListener worskpaceExplorerNotificationListener : listeners) {
			worskpaceExplorerNotificationListener.onAborted();
		}
	}
	
	/**
	 * Notify failed.
	 *
	 * @param t the t
	 */
	private void notifyFailed(Throwable t){
		
		for (WorskpaceExplorerNotificationListener worskpaceExplorerNotificationListener : listeners) {
			worskpaceExplorerNotificationListener.onFailed(t);
		}
	}
	
	/**
	 * Gets the caption txt.
	 *
	 * @return the captionTxt
	 */
	public String getCaptionTxt() {
		return captionTxt;
	}

	/**
	 * Checks if is valid hide.
	 *
	 * @return the isValidHide
	 */
	public boolean isValidHide() {
		return isSelect;
	}
	
	/* (non-Javadoc)
	 * @see com.github.gwtbootstrap.client.ui.Modal#show()
	 */
	@Override
	public void show() {
		super.show();
		isSelect = false;
	}

	
	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.HasWorskpaceExplorerNotificationListener#addWorkspaceExplorerNotificationListener(org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.WorskpaceExplorerNotificationListener)
	 */
	@Override
	public void addWorkspaceExplorerNotificationListener(WorskpaceExplorerNotificationListener handler) {
		if(handler!=null)
			listeners.add(handler);
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.HasWorskpaceExplorerNotificationListener#removeWorkspaceExplorerNotificationListener(org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerNotification.WorskpaceExplorerNotificationListener)
	 */
	@Override
	public void removeWorkspaceExplorerNotificationListener(WorskpaceExplorerNotificationListener handler) {
		if(handler!=null){
			if(listeners.contains(handler))
				listeners.remove(handler);
		}
	}
}