/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */

package org.dive4elements.river.artifacts.states.fixation;

import java.util.List;

import org.apache.log4j.Logger;
import org.dive4elements.artifacts.CallContext;
import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
import org.dive4elements.river.artifacts.D4EArtifact;
import org.dive4elements.river.artifacts.model.fixings.FixingColumn;
import org.dive4elements.river.artifacts.model.fixings.FixingsOverview;
import org.dive4elements.river.artifacts.model.fixings.FixingsOverviewFactory;
import org.dive4elements.river.artifacts.model.fixings.FixingsOverview.IdFilter;
import org.dive4elements.river.artifacts.states.DefaultState;
import org.dive4elements.river.utils.RiverUtils;
import org.w3c.dom.Element;

/**
 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
 */
public class EventSelect extends DefaultState {

    /** The log used in this class. */
    private static Logger log = Logger.getLogger(EventSelect.class);

    /**
     * The default constructor that initializes an empty State object.
     */
    public EventSelect() {
    }

    @Override
    protected String getUIProvider() {
        return "fix.event_panel";
    }

    @Override
    protected Element createStaticData(final D4EArtifact flys, final ElementCreator creator, final CallContext cc, final String name, final String value,
            final String type) {
        return this.createStaticDataPublic(flys, creator, cc, name, value, type);
    }

    public final static Element createStaticDataPublic(final D4EArtifact flys, final ElementCreator creator, final CallContext cc, final String name,
            final String value, final String type) {
        final int[] array = RiverUtils.intArrayFromString(value);

        final Element dataElement = creator.create("data");
        creator.addAttr(dataElement, "name", name, true);
        creator.addAttr(dataElement, "type", type, true);

        final String river = RiverUtils.getRiver(flys).getName();

        final FixingsOverview overview = FixingsOverviewFactory.getOverview(river);

        for (final int element : array) {
            final Element itemElement = creator.create("item");
            creator.addAttr(itemElement, "value", String.valueOf(element), true);

            creator.addAttr(itemElement, "label", getLabelForEvent(cc, element, overview), true);
            dataElement.appendChild(itemElement);
        }
        return dataElement;
    }

    private static final String getLabelForEvent(final CallContext cc, final int value, final FixingsOverview overview) {
        log.debug("Create label for value: " + value);

        final IdFilter filter = new IdFilter(value);
        final List<FixingColumn> columns = overview.filter(null, filter);
        return columns.isEmpty() ? "" : columns.get(0).getDescription();
    }
}
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