package org.gcube.portlets.user.td.tablewidget.client.custom;

import com.google.gwt.core.client.GWT;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.client.ui.AbstractImagePrototype;
import com.sencha.gxt.core.client.XTemplates;

/**
 * 
 * @author "Giancarlo Panichi"
 * 
 */
public class ValidationCellAppearance {

	public interface Style extends CssResource {
		String image();
	}

	public interface Template extends XTemplates {
		@XTemplate(source = "ValidationButton.html")
		SafeHtml template(Style style, SafeHtml img, String title, String alt);
	}

	public interface Resources extends ClientBundle {
		@Source("ValidationButton.css")
		Style style();
	}

	private final Style style;
	private final Template template;

	public ImageResource trueIcon;
	public ImageResource falseIcon;

	public String title;

	public ValidationCellAppearance() {
		this((Resources) GWT.create(Resources.class));
	}

	public ValidationCellAppearance(Resources resources) {
		this.style = resources.style();
		this.style.ensureInjected();
		this.template = GWT.create(Template.class);
	}

	public void render(SafeHtmlBuilder sb, Boolean value) {
		SafeHtml safeIcon = SafeHtmlUtils.fromString("");
		String alt = "";
		if (value != null) {
			if (value) {
				safeIcon = makeImage(trueIcon);
				alt = "true";
			} else {
				safeIcon = makeImage(falseIcon);
				alt = "false";
			}
		}
		sb.append(template.template(style, safeIcon, title, alt));
	}

	/**
	 * Make icons available as SafeHtml to be displayed inside the table
	 * 
	 * @param resource
	 * @return
	 */
	private static SafeHtml makeImage(ImageResource resource) {
		AbstractImagePrototype proto = AbstractImagePrototype.create(resource);
		String html = proto.getHTML();
		return SafeHtmlUtils.fromTrustedString(html);
	}
}