package pt.ist.renderers;

import org.apache.commons.lang.StringUtils;

import pt.ist.renderers.components.HtmlComponent;
import pt.ist.renderers.components.HtmlMenu;
import pt.ist.renderers.components.HtmlMenuOption;
import pt.ist.renderers.components.converters.Converter;
import pt.ist.renderers.layouts.Layout;
import pt.ist.renderers.model.MetaSlotKey;
import pt.ist.renderers.utils.RenderUtils;

/**
 * This renderer provides an alternative way of doing the input of a boolean
 * value. This renderer presents an html menu with two options: one for the
 * <tt>true</tt> value, and other for the <tt>false</tt> value.
 * 
 * <p>
 * The options text is retrieved from the resources using the keys <tt>TRUE</tt>
 * and <tt>FALSE</tt>.
 * 
 * <p>
 * Example: <select> <option>Yes</option> <option>No</option> </select>
 * 
 * @author cfgi
 */
public class BooleanMenuInputRenderer extends InputRenderer {

    private String nullOptionKey;
    private String bundle;

    public String getNullOptionKey() {
	return nullOptionKey;
    }

    public void setNullOptionKey(String nullOptionKey) {
	this.nullOptionKey = nullOptionKey;
    }

    public String getBundle() {
	return bundle;
    }

    public void setBundle(String bundle) {
	this.bundle = bundle;
    }

    @Override
    protected Layout getLayout(Object object, Class type) {
	return new Layout() {

	    @Override
	    public HtmlComponent createComponent(Object object, Class type) {
		HtmlMenu menu = new HtmlMenu();

		if (getNullOptionKey() != null) {
		    String defaultOptionTitle = RenderUtils.getResourceString(getBundle(), getNullOptionKey());
		    menu.createDefaultOption(defaultOptionTitle).setSelected(object == null);
		    menu.setConverter(new Converter() {
			@Override
			public Object convert(Class type, Object value) {
			    return StringUtils.isEmpty((String) value) ? null : Boolean.valueOf((String) value);
			}
		    });
		}

		HtmlMenuOption trueOption = menu.createOption(RenderUtils.getResourceString("TRUE"));
		HtmlMenuOption falseOption = menu.createOption(RenderUtils.getResourceString("FALSE"));

		trueOption.setValue("true");
		falseOption.setValue("false");

		if (object != null) {
		    (((Boolean) object) ? trueOption : falseOption).setSelected(true);
		}

		menu.setTargetSlot((MetaSlotKey) getInputContext().getMetaObject().getKey());

		return menu;
	    }

	};
    }

}