/* (c) 2014 - 2016 Open Source Geospatial Foundation - all rights reserved
 * (c) 2001 - 2013 OpenPlans
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */
package org.geoserver.web.wicket;

import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.attributes.AjaxRequestAttributes;
import org.apache.wicket.ajax.attributes.IAjaxCallListener;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.IModel;

/**
 * A simple ajax link with a label inside. This is a utility component,
 * avoid some boilerplate code in case the link is really just 
 * @author Andrea Aime - OpenGeo
 */
@SuppressWarnings("serial")
public abstract class SimpleAjaxLink<T> extends Panel {
    AjaxLink<T> link;
    Label label;
    
    public SimpleAjaxLink(String id) {
        this(id, null);
    }
    
    public SimpleAjaxLink(String id, IModel<T> model) {
        this(id, model, model);
    }

    public SimpleAjaxLink(String id, IModel<T> linkModel, IModel<?> labelModel) {
        super(id, linkModel);
        
        add(link = buildAjaxLink(linkModel));
        link.add(label = new Label("label", labelModel));
    }

    
    protected AjaxLink<T> buildAjaxLink(IModel<T> linkModel) {
        return new AjaxLink<T>("link", linkModel) {

            @Override
            public void onClick(AjaxRequestTarget target) {
                SimpleAjaxLink.this.onClick(target);
            }
            
            @Override
            protected void updateAjaxAttributes(AjaxRequestAttributes attributes) {
                super.updateAjaxAttributes(attributes);
                attributes.getAjaxCallListeners().add(SimpleAjaxLink.this.getAjaxListener());
            }
            
        };
    }
    
    protected IAjaxCallListener getAjaxListener() {
        return null;
    }

    public AjaxLink<T> getLink() {
        return link;
    }
    
    public Label getLabel() {
        return label;
    }
    
    public T getModelObject() {
        return link.getModelObject();
    }
    
    public IModel<T> getModel() {
        return link.getModel();
    }
    
        
    /**
     * Subclasses should override and provide the behaviour for 
     * 
     * @param target
     */
    protected abstract void onClick(AjaxRequestTarget target);

}