package de.intevation.flys.artifacts.states;

import java.util.List;

import org.apache.log4j.Logger;

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

import de.intevation.flys.artifacts.resources.Resources;


/**
 * The final state that will be reached after the discharge curve calculation
 * mode has been chosen.
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class ComputedDischargeCurveState
extends      DefaultState
implements   FacetTypes
{
    /** The logger that is used in this state.*/
    private static Logger logger =
        Logger.getLogger(ComputedDischargeCurveState.class);

    public ComputedDischargeCurveState() {
    }


    @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.getComputedDischargeCurveData();

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

        if (facets != null && wqkms.length > 0) {
            for (int i = 0; i < wqkms.length; ++i) {

                Object[] args = new Object[] {
                    winfo.getRiver().getName(),
                    wqkms[i].getName()
                };

                String name = Resources.getMsg(
                    context.getMeta(),
                    "chart.computed.discharge.curve.curve.label",
                    "",
                    args);

                facets.add(new WaterlevelFacet(i, COMPUTED_DISCHARGE_Q, name));
            }
            facets.add(new DataFacet(CSV, "CSV data"));
        }

        return res;
    }
}
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