package de.intevation.flys.artifacts.states;

import java.util.List;

import org.apache.log4j.Logger;

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

import de.intevation.artifactdatabase.state.Facet;

import de.intevation.flys.artifacts.FLYSArtifact;
import de.intevation.flys.artifacts.WINFOArtifact;
import de.intevation.flys.artifacts.model.FacetTypes;
import de.intevation.flys.artifacts.model.ReportFacet;
import de.intevation.flys.artifacts.model.WaterlevelFacet;
import de.intevation.flys.artifacts.model.WQKms;

import de.intevation.flys.artifacts.model.DataFacet;
import de.intevation.flys.artifacts.model.CalculationResult;


public class WaterlevelState
extends      DefaultState
implements   FacetTypes
{
    /** The logger that is used in this state.*/
    private static Logger logger = Logger.getLogger(WaterlevelState.class);


    @Override
    protected String getUIProvider() {
        return "continue";
    }


    /**
     * This method returns always true, because there is no data to validate.
     *
     * @param artifact The Artifact.
     * @param context The CallContext.
     *
     * @return always true.
     */
    @Override
    public boolean validate(Artifact artifact, CallContext context)
    throws IllegalArgumentException
    {
        return true;
    }


    @Override
    public Object computeAdvance(
        FLYSArtifact artifact,
        String       hash,
        CallContext  context,
        List<Facet>  facets,
        Object       old
    ) {
        WINFOArtifact winfo = (WINFOArtifact)artifact;

        CalculationResult res = old instanceof CalculationResult
            ? (CalculationResult)old
            : winfo.getWaterlevelData();

        if (facets == null) {
            return res;
        }

        WQKms [] wqkms = (WQKms [])res.getData();

        for (int i = 0; i < wqkms.length; i++) {
            String nameW = null;
            String nameQ = null;

            if (winfo.isQ()) {
                nameQ = wqkms[i].getName();
                nameW = "W(" + nameQ + ")";
            }
            else {
                nameW = wqkms[i].getName();
                nameQ = "Q(" + nameQ + ")";
            }

            logger.debug("Create facet: " + nameW);
            logger.debug("Create facet: " + nameQ);

            Facet w = new WaterlevelFacet(i, LONGITUDINAL_W, nameW);
            Facet q = new WaterlevelFacet(i, LONGITUDINAL_Q, nameQ);

            facets.add(w);
            facets.add(q);
        }

        if (wqkms.length > 0) {
            Facet wst = new DataFacet(WST, "WST data");
            Facet csv = new DataFacet(CSV, "CSV data");

            facets.add(wst);
            facets.add(csv);
        }

        if (res.getReport().hasProblems()) {
            facets.add(new ReportFacet());
        }

        return res;
    }
}
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