package org.gcube.portlets.widgets.ckandatapublisherwidget.client.ui.utils;

import java.util.List;

import com.github.gwtbootstrap.client.ui.Icon;
import com.github.gwtbootstrap.client.ui.Popover;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Style.Cursor;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.EventListener;
import com.google.gwt.user.client.ui.FocusPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.Widget;

/**
 * Labels and texts for core ckan information
 * @author Costantino Perciante at ISTI-CNR (costantino.perciante@isti.cnr.it)
 */
public class InfoIconsLabels {

	// TAGS
	public static final String TAGS_INFO_ID_POPUP = "tags-popup-panel-info";
	public static final String TAGS_INFO_CAPTION = "Tags";
	public static final String TAGS_INFO_TEXT = "Tags are meaningful information that can be associated to the "
			+ "product and by means of them it can be retrieved. A tag can contain only alphanumeric characters. "
			+ "If the tag is composed by a single word it must have a size of at least two characters."
			+ "Examples of good tags: \"This is a sample tag\", \"tagY\". Example of bad tag: \"c\".";
	
	// LICENSES
	public static final String LICENSES_INFO_ID_POPUP = "licenses-popup-panel-info";
	public static final String LICENSES_INFO_CAPTION = "Licenses";
	public static final String LICENSES_INFO_TEXT = "License definitions and additional information can be found at <a href=\"http://opendefinition.org/licenses/\" target=\"_blank\">opendefinition.org</a>";

	// VISIBILITY
	public static final String VISIBILITY_INFO_ID_POPUP = "visibility-popup-panel-info";
	public static final String VISIBILITY_INFO_CAPTION = "Visibility";
	public static final String VISIBILITY_INFO_TEXT = "Restricted products can only be accessed by certain users, while  Public products can be accessed by anyone.";

	// AUTHOR
	public static final String AUTHOR_INFO_ID_POPUP = "author-popup-panel-info";
	public static final String AUTHOR_INFO_CAPTION = "Author's fullname";
	public static final String AUTHOR_INFO_TEXT = "The author of this product. Example: Joe Bloggs.";

	// AUTHOR EMAIL
	public static final String AUTHOR_EMAIL_INFO_ID_POPUP = "author-email-popup-panel-info";
	public static final String AUTHOR_EMAIL_INFO_CAPTION = "Author's email";
	public static final String AUTHOR_EMAIL_INFO_TEXT = "The author's email. Example: joe.bloggs@catalogue.com";

	// MAINTAINER
	public static final String MAINTAINER_INFO_ID_POPUP = "maintainer-popup-panel-info";
	public static final String MAINTAINER_INFO_CAPTION = "Maintainer";
	public static final String MAINTAINER_INFO_TEXT = "The maintainer of this product (a person or an organization). Examples: Joe Bloggs, D4Science";

	// MAINTAINER EMAIL
	public static final String MAINTAINER_EMAIL_INFO_ID_POPUP = "maintainer-email-popup-panel-info";
	public static final String MAINTAINER_EMAIL_INFO_CAPTION = "Maintainer's email";
	public static final String MAINTAINER_EMAIL_INFO_TEXT = "The maintainer's email. Example: joe.bloggs@catalogue.com";

	// PROFILES
	public static final String PROFILES_INFO_ID_POPUP = "product-profiles-popup-panel-info";
	public static final String PROFILES_INFO_CAPTION = "Product Profiles";
	public static final String PROFILES_INFO_TEXT = "Select a profile, different from none, for your product among the ones available";

	// RESOURCES
	public static final String RESOURCES_INFO_ID_POPUP = "resouces-popup-panel-info";
	public static final String RESOURCES_INFO_CAPTION = "Product Resources";
	public static final String RESOURCES_INFO_TEXT = "Folder content will be added as resources of the product";
	
	// CUSTOM FIELDS
	public static final String CUSTOM_FIELDS_INFO_ID_POPUP = "custom-fields-popup-panel-info";
	public static final String CUSTOM_FIELDS_INFO_CAPTION = "Product Custom Fields";
	public static final String CUSTOM_FIELDS_INFO_TEXT = "Custom fields are customable metadata that will be added to the product. You have to choose a unique key for the field and a value for this. You can remove them at any time until you create theproduct.";
	
	// TITLE
	public static final String TITLE_INFO_ID_POPUP = "title-popup-panel-info";
	public static final String TITLE_INFO_TEXT = "Product Title must contain only alphanumer characters, dots, underscore or hyphen minus. No others symbols are allowed.";
	public static final String TITLE_INFO_CAPTION = "Product Title";
	
	/**
	 * Prepare the popover and the gcube popup panel for information.
	 * @param text
	 * @param captionText
	 * @param iconElement
	 * @param popover
	 * @param focusPanel
	 */
	public static void preparePopupPanelAndPopover(
			final String popupId, 
			final String text, 
			final String captionText, 
			Icon iconElement, 
			Popover popover, 
			FocusPanel focusPanel,
			final List<String> popupOpenedIds
			){

		// prepare the popover
		popover.setText(new HTML("<p style='color:initial'>" + text +"</p>").getHTML());
		popover.setHeading(new HTML("<b>" + captionText +"</b>").getHTML());

		// set icon cursor
		iconElement.getElement().getStyle().setCursor(Cursor.HELP);

		// prepare the gcube dialog
		focusPanel.addClickHandler(new ClickHandler() {

			@Override
			public void onClick(ClickEvent event) {

				// Retrieve elemnt that should have this id
				GcubeDialogExtended popup = null;
				try{
					Element element = DOM.getElementById(popupId);
					popup = (GcubeDialogExtended) Widget.asWidgetOrNull(getWidget(element));
				}catch(Exception e){
					GWT.log("ERROR", e);
				}

				// if it doesn't exist, create it
				if(popup == null){

					popup = new GcubeDialogExtended(captionText, text);
					popup.getElement().setId(popupId);
					popup.setModal(false);

					// add its id
					popupOpenedIds.add(popupId);

				}

				// then center and show
				popup.center();
				popup.show();

			}
		});

	}
	
	/**
	 * Check if an element of such type is actually a widget
	 * @param element
	 * @return
	 */
	public static IsWidget getWidget(Element element) {
		EventListener listener = DOM
				.getEventListener(element);
		// No listener attached to the element, so no widget exist for this
		// element
		if (listener == null) {
			GWT.log("Widget is NULL");
			return null;
		}
		if (listener instanceof Widget) {
			// GWT uses the widget as event listener
			GWT.log("Widget is " + listener);
			return (Widget) listener;
		}
		return null;
	}
	
	/**
	 * Close any dialog box opened
	 */
	public static void closeDialogBox(List<String> popupOpenedIds) {

		for (String popupid : popupOpenedIds) {
			GcubeDialogExtended popup = null;
			try{
				Element element = DOM.getElementById(popupid);
				popup = (GcubeDialogExtended) Widget.asWidgetOrNull(getWidget(element));
				popup.hide();
			}catch(Exception e){
				GWT.log("ERROR", e);
			}	
		}
	}

}