package de.intevation.flys.artifacts.states;

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

import org.apache.log4j.Logger;

import de.intevation.artifactdatabase.state.Facet;

import de.intevation.artifacts.CallContext;

import de.intevation.flys.artifacts.FLYSArtifact;
import de.intevation.flys.artifacts.MINFOArtifact;
import de.intevation.flys.artifacts.model.CalculationResult;
import de.intevation.flys.artifacts.model.DataFacet;
import de.intevation.flys.artifacts.model.FacetTypes;
import de.intevation.flys.artifacts.model.FlowVelocityCalculation;
import de.intevation.flys.artifacts.model.FlowVelocityData;


public class FlowVelocityState extends DefaultState implements FacetTypes {

    private static Logger logger = Logger.getLogger(FlowVelocityState.class);


    @Override
    public Object computeAdvance(
        FLYSArtifact artifact,
        String       hash,
        CallContext  context,
        List<Facet>  facets,
        Object       old
    ) {
        logger.debug("FlowVelocityState.computeAdvance");

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

        CalculationResult res = old instanceof CalculationResult
            ? (CalculationResult) old
            : new FlowVelocityCalculation().calculate((MINFOArtifact) artifact);

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

        FlowVelocityData[] data = (FlowVelocityData[]) res.getData();

        logger.debug("Calculated " + data.length + " FlowVelocityData objects");

        String id = getID();

        for (FlowVelocityData d: data) {
            logger.error("TODO: Implement Facet creation for chart!");

        }

        Facet csv = new DataFacet(
            CSV, "CSV data", ComputeType.ADVANCE, hash, id);

        // TODO ADD PDF FACET

        newFacets.add(csv);

        logger.debug("Created " + newFacets.size() + " new Facets.");

        facets.addAll(newFacets);

        return res;
    }
}
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