package org.gcube.portlets.user.reportgenerator.client.targets;

import org.gcube.portlets.user.reportgenerator.client.ReportGenerator;
import org.gcube.portlets.user.reportgenerator.client.Presenter.Presenter;
import org.gcube.portlets.user.workspace.client.workspace.GWTWorkspaceItem;
import org.gcube.portlets.user.workspace.client.workspace.folder.item.GWTExternalImage;

import com.extjs.gxt.ui.client.widget.Component;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;


/**
 * <code> DroppingArea </code> class is a Widget you can drop image on
 *
 * @author Massimiliano Assante, ISTI-CNR - massimiliano.assante@isti.cnr.it
 * @version May 20012 (3.5) 
 */
public class DroppingArea extends Component {
	
	private String expectedContent = "";

	private VerticalPanel mainPanel;	
	private Image droppedImage;
	private Presenter presenter;

	private String idInBasket;

	private String currentUser;
	private String currentScope;

	Label label;

	private int width, height;

	/**
	 * @param presenter .
	 * @param width  .
	 * @param height . 
	 * @param tag the label  to display
	 */
	public DroppingArea(Presenter presenter, int width, int height, String tag) {
		if (tag.equals("")) {
			tag = "No suggestions available";
		}
		this.width = width;
		this.height = height;
		this.presenter = presenter;
		mainPanel = new VerticalPanel();
		super.setWidth(width+"px");
		super.setHeight(height+"px");
		mainPanel.setWidth(width+"px");
		mainPanel.setHeight(height+"px");
		setElement(mainPanel.getElement());

		addStyleName("droppingArea-Image");
		
		mainPanel.setHorizontalAlignment(HasAlignment.ALIGN_CENTER);
		mainPanel.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);

		label = new Label(tag);
		label.addStyleName("label");
		mainPanel.add(label);

		droppedImage = null;
	}

	public void add(Widget w) {
		mainPanel.add(w);
	}
	/**
	 * called when dropped an image on the area
	 * @param toShow the image to show
	 */
	public void showImage(Image toShow) {
		
		//mainPanel.remove(label);
		mainPanel.clear();
		this.droppedImage = toShow;
		toShow.setPixelSize(width, height);

		mainPanel.add(toShow);
		presenter.storeChangeInSession(this);

	}

	/**
	 * 
	 * @param url .
	 * @param id the id in the folder
	 */
	public void dropImage(String url, String id)
	{
		GWT.log("URL:" + url, null);
		idInBasket = id;
		showImage(new Image(url));
	}
	
	public void fetchImage(String identifier, boolean isInteralImage, boolean fullDetails) {
		this.mask("fetching image, pleas wait", "loading-indicator");
		ReportGenerator.get().getWSTreeService().getImageById(identifier, isInteralImage, fullDetails, new AsyncCallback<GWTWorkspaceItem>() {

			public void onSuccess(GWTWorkspaceItem result) {
				unmask();
				GWTExternalImage image = (GWTExternalImage) result;
				dropImage(image.getImageUrl(), image.getId());
			}
			public void onFailure(Throwable caught) {
				unmask();	
				Window.alert("Could not fetch image from infrastructure " + caught.getCause());
			}
		});
	}

	/**
	 * 
	 * @return the image
	 */
	public Image getDroppedImage() {
		if (droppedImage == null)
			return new Image();
		return droppedImage;
	}

	/**
	 * 
	 * @return the possible content
	 */
	public Label getLabel() {
		return label;
	}

	/**
	 * 
	 * @param label set the label
	 */
	public void setLabel(Label label) {
		this.label = label;
	}


	/**
	 * return a URL which is lookable for on the web
	 * @param imageName .
	 * @param templateName .
	 * @return .
	 */
	public String getImageURL(String imageName, String templateName) {
		currentUser = presenter.getCurrentUser().getUsername();
		currentScope = presenter.getCurrentScope();	
		/**
		 * Images will be stored under webapps/usersArea...
		 * GWT.getModuleBaseURL() returns 	 * e.g. http://dlib28.isti.cnr.it/templatecreator/html/
		 * need to get just http://dlib28.isti.cnr.it/
		 */
		//remove "/html/" and get e.g. http://dlib28.isti.cnr.it/templatecreator
		String host = GWT.getModuleBaseURL().substring(0, GWT.getModuleBaseURL().length()-6);

		//loog for last slash
		int lastSlash = host.lastIndexOf("/");

		//get what i need : e.g. http://dlib28.isti.cnr.it/ or  host = "http://localhost:8080/";
		host = host.substring(0, lastSlash +1 );
		//host = "http://localhost:8080/";

		String imgURL = host + "usersArea/"	+ currentScope + "/templates/" 
		+ currentUser + "/CURRENT_OPEN/images/" + imageName;
	
		return imgURL;
	}

	/**
	 * 
	 * @return .
	 */
	public String getIdInBasket() {
		return idInBasket;
	}

	/**
	 * 
	 * @param idInBasket .
	 */
	public void setIdInBasket(String idInBasket) {
		this.idInBasket = idInBasket;
	}
	/**
	 * 
	 * @return expectedContent
	 */
	public String getExpectedContent() {
		return expectedContent;
	}

	/**
	 * 
	 * @param expectedContent .
	 */
	public void setExpectedContent(String expectedContent) {
		this.expectedContent = expectedContent;
		if (expectedContent.compareTo("") != 0)
			label.setText(expectedContent);
	}


}