package de.intevation.flys.artifacts.states;

import org.w3c.dom.Element;

import org.apache.log4j.Logger;

import de.intevation.artifacts.Artifact;
import de.intevation.artifacts.CallContext;

import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
import de.intevation.artifacts.common.model.KVP;


/**
 * State that holds minimun and maximum (for validation).
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public abstract class MultiIntArrayState extends DefaultState {

    private static final Logger logger =
        Logger.getLogger(MultiIntArrayState.class);


    @Override
    protected void appendItems(
        Artifact       artifact,
        ElementCreator creator,
        String         name,
        CallContext    context,
        Element        select
    ) {
        try {
            creator.addAttr(select, "type", "intoptions", true);

            Element  choices = creator.create("choices");

            for (KVP kvp: getOptions(artifact, name)) {
                Element item = creator.create("item");
                creator.addAttr(item, "label", kvp.getValue().toString(), true);
                item.setTextContent(kvp.getKey().toString());

                choices.appendChild(item);
            }

            select.appendChild(choices);
        }
        catch (IllegalArgumentException iae) {
            logger.warn("Illegal argument", iae);
        }
    }


    protected abstract KVP<Integer, String>[] getOptions(
        Artifact artifact,
        String   parameterName
    )
    throws IllegalArgumentException;
}