package pt.ist.renderers.extensions;

import java.util.Collection;

import pt.ist.renderers.CheckBoxOptionListRenderer;
import pt.ist.renderers.components.HtmlComponent;
import pt.ist.renderers.components.HtmlText;
import pt.ist.renderers.components.converters.Converter;
import pt.ist.renderers.layouts.Layout;
import pt.ist.renderers.utils.RenderUtils;

/**
 * This is the Fenix extension to the
 * {@link pt.ist.renderers.CheckBoxOptionListRenderer}.
 * 
 * {@inheritDoc}
 * 
 * @author cfgi
 */
public class InputCheckBoxListRenderer extends CheckBoxOptionListRenderer {
    private String filterClass;

    private String emptyMessageKey;

    private String emptyMessageBundle;

    private String emptyMessageClasses;

    /**
     * This property allows you to configure the css classes used in the empty
     * message
     * 
     * @property
     */

    public String getEmptyMessageClasses() {
	return emptyMessageClasses;
    }

    public void setEmptyMessageClasses(String emptyMessageClasses) {
	this.emptyMessageClasses = emptyMessageClasses;
    }

    /**
     * This property allows you to configure the bundle that the empty message
     * key uses
     * 
     * @property
     */
    public String getEmptyMessageBundle() {
	return emptyMessageBundle;
    }

    public void setEmptyMessageBundle(String emptyMessageBundle) {
	this.emptyMessageBundle = emptyMessageBundle;
    }

    /**
     * This property allows you to configure a display message in case the
     * object list is empty
     * 
     * @property
     */
    public String getEmptyMessageKey() {
	return emptyMessageKey;
    }

    public void setEmptyMessageKey(String emptyMessageKey) {
	this.emptyMessageKey = emptyMessageKey;
    }

    public String getFilterClass() {
	return this.filterClass;
    }

    /**
     * Since all objects of a given type are selected with
     * {@link #setChoiceType(String) choiceType}, this property allows you to
     * specify a {@link DataFilter data filter} that filters objects that are
     * not allowed from the collection created by the provider.
     * 
     * @property
     */
    public void setFilterClass(String filterClass) {
	this.filterClass = filterClass;
    }

    // HACK: duplicated code, id=inputChoices.selectPossibilitiesAndConverter
    @Override
    protected Converter getConverter() {
	    return super.getConverter();
    }

    // HACK: duplicated code, id=inputChoices.selectPossibilitiesAndConverter
    @Override
    protected Collection getPossibleObjects() {
	    return super.getPossibleObjects();

    }

    @Override
    public Layout getLayout(Object object, Class type) {
	return new InputCheckBoxLayoutWithEmptyMessage();
    }

    class InputCheckBoxLayoutWithEmptyMessage extends CheckBoxListLayout {

	private boolean empty;

	@Override
	public HtmlComponent createComponent(Object object, Class type) {
	    Collection collection = (Collection) object;
	    HtmlComponent component;

	    if (getEmptyMessageKey() != null && collection.isEmpty() && getPossibleObjects().isEmpty()) {
		component = new HtmlText(RenderUtils.getResourceString(getEmptyMessageBundle(), getEmptyMessageKey()));
		this.empty = true;
	    } else {
		component = super.createComponent(object, type);
		this.empty = false;
	    }
	    return component;
	}

	@Override
	public void applyStyle(HtmlComponent component) {
	    if (this.empty) {
		component.setClasses(getEmptyMessageClasses());
	    } else {
		super.applyStyle(component);
	    }

	}
    }
}