/**
 *
 */
package org.gcube.portlets.gcubeckan.gcubeckandatacatalog.client.view;

import org.gcube.portlets.gcubeckan.gcubeckandatacatalog.client.GCubeCkanDataCatalog;
import org.gcube.portlets.gcubeckan.gcubeckandatacatalog.client.resource.CkanPortletResources;
import org.gcube.portlets.gcubeckan.gcubeckandatacatalog.shared.CkanRole;

import com.google.gwt.core.shared.GWT;
import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Frame;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.ScrollPanel;


/**
 * The Class GCubeCkanDataCatalogPanel.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * Jun 9, 2016
 */
public class GCubeCkanDataCatalogPanel extends BaseViewTemplate{

	private CkanMetadataManagementPanel managementPanel;
	private ScrollPanel centerScrollable = new ScrollPanel();
	private CkanFramePanel ckanFramePanel = new CkanFramePanel();
	private Image loading = new Image(CkanPortletResources.ICONS.loading());
	private RootPanel rootPanel;
	private HandlerManager eventBus;

	/**
	 * Instantiates a new g cube ckan data catalog panel.
	 *
	 * @param rootPanel the root panel
	 * @param eventManager the event manager
	 */
	public GCubeCkanDataCatalogPanel(RootPanel rootPanel, HandlerManager eventManager){
		this.rootPanel = rootPanel;
		this.eventBus = eventManager;
		managementPanel = new CkanMetadataManagementPanel(eventBus);
		initPanel();
		GCubeCkanDataCatalog.service.getCKanConnector(new AsyncCallback<String>() {

			@Override
			public void onSuccess(String ckanUrlConnector) {

				instanceCkanFrame(ckanUrlConnector);
				GCubeCkanDataCatalogPanel.this.rootPanel.remove(loading);
				updateSize();
			}

			@Override
			public void onFailure(Throwable caught) {
				GCubeCkanDataCatalogPanel.this.rootPanel.remove(loading);
				Window.alert("Sorry, An error occurred during contacting Gcube Ckan Data Catalogue!");
			}
		});


		//MANAGE CKAN MANAGEMENT PANEL ACCORDING TO MY ROLE
		GCubeCkanDataCatalog.service.getMyRole(new AsyncCallback<CkanRole>() {

			@Override
			public void onFailure(Throwable caught) {
			}

			@Override
			public void onSuccess(CkanRole result) {

				switch (result) {
				case ADMIN:
					setTopPanelVisible(true);
					break;
				case EDITOR:
					setTopPanelVisible(true);
					break;
				case MEMBER:
					setTopPanelVisible(false);
					break;
				case SYSADMIN:
					setTopPanelVisible(true);
					break;
				default:
					break;
				}
			}
		});

		Window.addResizeHandler(new ResizeHandler() {

			@Override
			public void onResize(ResizeEvent event) {

				GWT.log("onWindowResized width: " + event.getWidth() + " height: " + event.getHeight());
				updateSize();
			}
		});

		rootPanel.add(loading);
		rootPanel.add(this);
		updateSize();

	}

	/**
	 * Gets the top panel height.
	 *
	 * @return the top panel height
	 */
	public int getTopPanelHeight(){

		if(managementPanel.isVisible())
			return managementPanel.getCurrentHeight();

		return 0;
	}

	/**
	 * Sets the top panel visible.
	 *
	 * @param bool the new top panel visible
	 */
	public void setTopPanelVisible(boolean bool){
		managementPanel.setVisible(bool);
		updateSize();

	}

	/**
	 * Instance ckan frame.
	 *
	 * @param ckanUrlConnector the ckan url connector
	 * @return the frame
	 */
	private Frame instanceCkanFrame(String ckanUrlConnector){

		return ckanFramePanel.instanceFrame(ckanUrlConnector);

	}

	/**
	 * Inits the panel.
	 */
	private void initPanel() {
		setTopPanelVisible(false);
		addToTop(managementPanel);
	    centerScrollable.add(ckanFramePanel);
	    addToMiddle(centerScrollable);
	}

	/**
	 * Update window size.
	 */
	public void updateSize(){

	    RootPanel workspace = rootPanel;
	    int topBorder = workspace.getAbsoluteTop();
	    int leftBorder = workspace.getAbsoluteLeft();
	    int footer = 0; //85 footer is bottombar + sponsor
	    int rightScrollBar = 0;
	    int rootHeight = Window.getClientHeight() - topBorder - 5 - footer;// - ((footer == null)?0:(footer.getOffsetHeight()-15));
		int rootWidth = Window.getClientWidth() - 2* leftBorder - rightScrollBar;
	    GWT.log("New iFrame size w: "+rootWidth + " h: "+rootHeight);
	    this.setSize(rootWidth+"px",rootHeight+"px");
	    int height = rootHeight - getTopPanelHeight();
	    if(ckanFramePanel.getFrame()!=null)
	    	ckanFramePanel.getFrame().setSize(rootWidth+"px", height+"px");
    }
}