package de.intevation.flys.artifacts;

import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;

import org.w3c.dom.Document;

import de.intevation.artifactdatabase.state.Facet;

import de.intevation.artifacts.Artifact;
import de.intevation.artifacts.ArtifactFactory;
import de.intevation.artifacts.ArtifactNamespaceContext;
import de.intevation.artifacts.CallMeta;

import de.intevation.artifacts.common.utils.XMLUtils;

import de.intevation.flys.artifacts.model.FacetTypes;
import de.intevation.flys.artifacts.model.WQKms;
import de.intevation.flys.artifacts.model.WKmsFactory;
import de.intevation.flys.artifacts.model.WQKmsFactory;

import de.intevation.flys.artifacts.states.DefaultState;


/**
 * Artifact to access additional "waterlevel/discharge"-type of data, like
 * fixation measurements.
 *
 * This artifact neglects (Static)FLYSArtifacts capabilities of interaction
 * with the StateEngine by overriding the getState*-methods.
 */
public class StaticWQKmsArtifact
extends      StaticFLYSArtifact
implements   FacetTypes
{
    /** The logger for this class. */
    private static Logger logger =
        Logger.getLogger(StaticWQKmsArtifact.class);

    /** XPath to access initial parameter. */
    public static final String XPATH_DATA =
        "/art:action/art:ids/@value";

    public static final String STATIC_STATE_NAME =
        "state.additional_wqkms.static";


    /**
     * Trivial Constructor.
     */
    public StaticWQKmsArtifact() {
        logger.debug("StaticWQKmsArtifact.StaticWQKmsArtifact");
    }


    /**
     * Gets called from factory, to set things up.
     */
    @Override
    public void setup(
        String          identifier,
        ArtifactFactory factory,
        Object          context,
        CallMeta        callMeta,
        Document        data)
    {
        logger.debug("StaticWQKmsArtifact.setup");

        // Store the 'ids' (from datacage).
        logger.debug("StaticWQKmsArtiact.setup" + XMLUtils.toString(data));

        String code = XMLUtils.xpathString(
            data, XPATH_DATA, ArtifactNamespaceContext.INSTANCE);
        addStringData("ids", code);
        if (code != null) {
            String [] parts = code.split("-");

            if (parts.length >= 4) {
                int col = Integer.valueOf(parts[2]);
                int wst = Integer.valueOf(parts[3]);

                addStringData("col_pos", parts[2]);
                addStringData("wst_id",  parts[3]);
            }
        }

        // Do this AFTER we have set the col_pos etc.
        super.setup(identifier, factory, context, callMeta, data);
    }


    /**
     * Called via setup.
     *
     * @param artifact The master-artifact.
     */
    @Override
    protected void initialize(
        Artifact artifact,
        Object context,
        CallMeta meta)
    {
        logger.debug("StaticWQKmsArtifact.initialize");
        WINFOArtifact winfo = (WINFOArtifact) artifact;
        // TODO: The river is of no interest, so far., also use importData
        addData("river", winfo.getData("river"));

        List<Facet> fs = new ArrayList<Facet>();

        DefaultState state = (DefaultState) getCurrentState(context);
        state.computeInit(this, hash(), context, meta, fs);
        if (!fs.isEmpty()) { 
            logger.debug("Facets to add in StaticWQKmsArtifact.initialize ."); 
            facets.put(getCurrentStateId(), fs); 
        } 
        else { 
            logger.debug("No facets to add in StaticWQKmsArtifact.initialize ("
                + state.getID() + ").");
        }
    }


    /**
     * Get WQKms from factory.
     * @return WQKms according to parameterization (can be null);
     */
    public WQKms getWQKms() {
        logger.debug("StaticWQKmsArtifact.getWQKms");

        int col = Integer.valueOf(getDataAsString("col_pos"));
        int wst = Integer.valueOf(getDataAsString("wst_id"));

        /** TODO do not run twice against db to do this. */
        String wkmsName = WKmsFactory.getWKmsName(col, wst);

        WQKms res = WQKmsFactory.getWQKms(
            Integer.valueOf(getDataAsString("col_pos")),
            Integer.valueOf(getDataAsString("wst_id")));
        res.setName(wkmsName);
        return res;
    }


    /**
     * Determines Facets initial disposition regarding activity (think of
     * selection in Client ThemeList GUI). This will be checked one time
     * when the facet enters a collections describe document.
     *
     * @param facetName name of the facet.
     * @param index     index of the facet.
     *
     * @return Always 0. Static Data will enter plots inactive.
     */
    @Override
    public int getInitialFacetActivity(
        String outputName,
        String facetName,
        int index)
    {
        return 0;
    }


    /** Return specific name. */
    public String getName() {
        return "staticwqkms";
    }

    // TODO implement deepCopy.
}
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