package org.gcube.portlets.widgets.wsexplorer.client.save;

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.event.LoadRootEvent;
import org.gcube.portlets.widgets.wsexplorer.client.notification.WorkspaceExplorerSaveNotification.HasWorskpaceExplorerSaveNotificationListener;
import org.gcube.portlets.widgets.wsexplorer.client.notification.WorkspaceExplorerSaveNotification.WorskpaceExplorerSaveNotificationListener;
import org.gcube.portlets.widgets.wsexplorer.shared.Item;
import org.gcube.portlets.widgets.wsexplorer.shared.ItemType;

import com.github.gwtbootstrap.client.ui.Button;
import com.github.gwtbootstrap.client.ui.Modal;
import com.github.gwtbootstrap.client.ui.ModalFooter;
import com.github.gwtbootstrap.client.ui.constants.ButtonType;
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;


/**
 * The Class WorkspaceExplorerSaveDialog.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * Jul 7, 2015
 */
public class WorkspaceExplorerSaveDialog extends Modal implements
		HasWorskpaceExplorerSaveNotificationListener {

	private Button saveButton;
	private WorkspaceExplorerSaveDialog INSTANCE = this;
	private boolean isSelect = false;
	private String captionTxt;
	private ModalFooter footer = new ModalFooter();
	private WorkspaceExplorerController controller = new WorkspaceExplorerController();
	private List<WorskpaceExplorerSaveNotificationListener> listeners = new ArrayList<WorskpaceExplorerSaveNotificationListener>();

	/**
	 * Instantiates a new workspace explorer save dialog.
	 *
	 * @param captionTxt the caption txt
	 */
	public WorkspaceExplorerSaveDialog(String captionTxt) {
		WorkspaceExplorerController.eventBus.fireEvent(new LoadRootEvent());
		initDialog(captionTxt);
	}

	/**
	 * Instantiates a new workspace explorer save dialog.
	 *
	 * @param captionTxt the caption txt
	 * @param showOnlyFolders the show only folders
	 */
	public WorkspaceExplorerSaveDialog(String captionTxt,
			boolean showOnlyFolders) {

		if (showOnlyFolders) {
			ItemType[] itemsType = new ItemType[2];
			itemsType[0] = ItemType.ROOT;
			itemsType[1] = ItemType.FOLDER;
			setSelectableTypes(itemsType);
			setShowableTypes(itemsType);
		}

		WorkspaceExplorerController.eventBus.fireEvent(new LoadRootEvent());
		initDialog(captionTxt);
	}

	/**
	 * Instantiates a new workspace explorer save dialog.
	 *
	 * @param captionTxt the caption txt
	 * @param selectableTypes the selectable types
	 * @param showableTypes the showable types
	 */
	public WorkspaceExplorerSaveDialog(String captionTxt,
			List<ItemType> selectableTypes, List<ItemType> showableTypes) {
		if (selectableTypes != null) {
			ItemType[] itemsType = new ItemType[selectableTypes.size()];
			itemsType = selectableTypes.toArray(itemsType);
			setSelectableTypes(selectableTypes.toArray(itemsType));
		}

		if (showableTypes != null) {
			ItemType[] itemsType = new ItemType[showableTypes.size()];
			itemsType = showableTypes.toArray(itemsType);
			setShowableTypes(showableTypes.toArray(itemsType));
		}

		WorkspaceExplorerController.eventBus.fireEvent(new LoadRootEvent());
		initDialog(captionTxt);
	}

	/**
	 * Inits the dialog.
	 *
	 * @param captionTxt
	 *            the caption txt
	 */
	private void initDialog(String captionTxt) {
		this.captionTxt = (captionTxt == null || captionTxt.isEmpty()) ? WorkspaceExplorerConstants.WORKSPACE_EXPLORER_CAPTION
				: captionTxt;
		setAnimation(false);
		setCloseVisible(true);
		setTitle(this.captionTxt);
		saveButton = new Button(WorkspaceExplorerConstants.SAVE);
		saveButton.setType(ButtonType.PRIMARY);
		setWidth(WorkspaceExplorerConstants.WIDHT_DIALOG);
		setMaxHeigth(WorkspaceExplorerConstants.MAX_HEIGHT_DIALOG);
		hide(false);

		addHideHandler(new HideHandler() {

			@Override
			public void onHide(HideEvent hideEvent) {
				if (!isSelect)
					notifyAborted();
			}
		});

		add(controller.getWorkspaceExplorerPanel());
		saveButton.addClickHandler(new ClickHandler() {

			@Override
			public void onClick(ClickEvent event) {
				isSelect = false;
				Item item = controller.getWsExplorer().getItemSelected();
				if (item != null) {
					isSelect = true;
					INSTANCE.hide();
					notifyParentSelected(item);
					
				} else if (!controller.getWsExplorer().itemIsSelectable()) {
					 // IGNORING ITEMS  NOT SELECTABLE, USING BREADCRUMBS
					Item itemB = controller.getBreadcrumbs().getLastParent();
					if (itemB != null) {
					}
				}
			}
		});
		footer.add(saveButton);
		add(footer);
	}

	/**
	 * Notify parent selected.
	 *
	 * @param selected the selected
	 */
	private void notifyParentSelected(Item selected) {

		for (WorskpaceExplorerSaveNotificationListener worskpaceExplorerNotificationListener : listeners) {
			worskpaceExplorerNotificationListener.onParentSelected(selected);
		}
	}

	/**
	 * Notify aborted.
	 */
	private void notifyAborted() {

		for (WorskpaceExplorerSaveNotificationListener worskpaceExplorerNotificationListener : listeners) {
			worskpaceExplorerNotificationListener.onAborted();
		}
	}

	/**
	 * Notify failed.
	 *
	 * @param t
	 *            the t
	 */
	@SuppressWarnings("unused")
	private void notifyFailed(Throwable t) {

		for (WorskpaceExplorerSaveNotificationListener 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;
	}

	/**
	 * Set which items are selectable.
	 * 
	 * @param selectableTypes
	 *            the selectableTypes to set
	 */
	private void setSelectableTypes(ItemType... selectableTypes) {
		controller.setSelectableTypes(selectableTypes);
	}

	/**
	 * Gets the selectable types.
	 *
	 * @return the selectable types
	 */
	public List<ItemType> getSelectableTypes() {
		return controller.getSelectableTypes();
	}

	/**
	 * Return the showable items.
	 * 
	 * @return the showableTypes
	 */
	public List<ItemType> getShowableTypes() {
		return controller.getShowableTypes();
	}

	/**
	 * Set the showable items. The folders items are show as default.
	 * 
	 * @param showableTypes
	 *            the showableTypes to set
	 */
	private void setShowableTypes(ItemType... showableTypes) {
		controller.setShowableTypes(showableTypes);
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerSaveNotification.HasWorskpaceExplorerSaveNotificationListener#addWorkspaceExplorerSaveNotificationListener(org.gcube.portlets.widgets.wsexplorer.client.notification.WorskpaceExplorerSaveNotification.WorskpaceExplorerSaveNotificationListener)
	 */
	@Override
	public void addWorkspaceExplorerSaveNotificationListener(WorskpaceExplorerSaveNotificationListener handler) {
		if(handler!=null)
			listeners.add(handler);
		
	}

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