package net.sourceforge.fenixedu.presentationTier.renderers;

import net.sourceforge.fenixedu.renderers.EnumRadioInputRenderer;
import net.sourceforge.fenixedu.renderers.components.HtmlComponent;
import net.sourceforge.fenixedu.renderers.components.HtmlHiddenField;
import net.sourceforge.fenixedu.renderers.components.HtmlInlineContainer;
import net.sourceforge.fenixedu.renderers.components.HtmlRadioButton;
import net.sourceforge.fenixedu.renderers.components.HtmlRadioButtonList;
import net.sourceforge.fenixedu.renderers.components.controllers.HtmlController;
import net.sourceforge.fenixedu.renderers.components.state.IViewState;
import net.sourceforge.fenixedu.renderers.components.state.ViewDestination;
import net.sourceforge.fenixedu.renderers.layouts.Layout;
import net.sourceforge.fenixedu.renderers.model.MetaSlot;

public class EnumRadioInputRendererWithPostBack extends EnumRadioInputRenderer  {

    private String destination;
    private final String HIDDEN_NAME = "postback";
    
    public String getDestination() {
        return destination;
    }

    /**
     * Allows to choose the postback destination. If this property is not
     * specified the default "postback" destination is used.
     * 
     * @property
     */
    public void setDestination(String destination) {
        this.destination = destination;
    }

    @Override
    protected Layout getLayout(Object object, Class type) {
        final Layout layout = super.getLayout(object, type);
        
        return new Layout() {
            
            @Override
            public HtmlComponent createComponent(Object object, Class type) {
            	 HtmlInlineContainer container = new HtmlInlineContainer();

                 String prefix = ((MetaSlot) getInputContext().getMetaObject()).getName();

                 HtmlHiddenField hidden = new HtmlHiddenField(prefix + HIDDEN_NAME, "");
                 hidden.setController(new PostBackController(hidden, getDestination()));
                 
                 
                 HtmlRadioButtonList radioButtonList = (HtmlRadioButtonList) layout.createComponent(object, type);
                 
                 for (HtmlRadioButton button : radioButtonList.getRadioButtons()) {
                 	button.setOnClick("this.form." + prefix + HIDDEN_NAME + ".value='true';this.form.submit();");
                 	button.setOnDblClick("this.form." + prefix + HIDDEN_NAME + ".value='true';this.form.submit();");
                 	
                 }
                 
                 if(getClasses()!=null) {
                	 applyStyle(radioButtonList);
                 }
                 
                 container.addChild(hidden);
                 container.addChild(radioButtonList);

                 return container;
            }

        };
    }

    private static class PostBackController extends HtmlController {

    	 private HtmlHiddenField hidden;

         private String destination;

         public PostBackController(HtmlHiddenField hidden, String destination) {
             this.hidden = hidden;
             this.destination = destination;
         }

         @Override
         public void execute(IViewState viewState) {
             if (hidden.getValue() != null && hidden.getValue().length() != 0) {
            	 hidden.setValue(null);
            	 
                 String destinationName = this.destination == null ? "postBack" : this.destination;
                 ViewDestination destination = viewState.getDestination(destinationName);

                 if (destination != null) {
                     viewState.setCurrentDestination(destination);
                 } else {
                     viewState.setCurrentDestination("postBack");
                 }

                 viewState.setSkipValidation(true);
             }

         }

    }
}