/**
 *
 */
package de.intevation.gnv.transition.timeseries;

import java.awt.Color;
import java.awt.Dimension;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Collection;
import java.util.Iterator;

import org.apache.log4j.Logger;

import de.intevation.gnv.chart.ChartFactory;
import de.intevation.gnv.chart.ChartLabels;
import de.intevation.gnv.chart.ChartStyle;
import de.intevation.gnv.chart.exception.TechnicalChartException;
import de.intevation.gnv.geobackend.base.Result;
import de.intevation.gnv.transition.OutputTransitionBase;
import de.intevation.gnv.transition.describedata.KeyValueDescibeData;
import de.intevation.gnv.transition.describedata.NamedCollection;
import de.intevation.gnv.transition.exception.TransitionException;

/**
 * @author Tim Englich <tim.englich@intevation.de>
 *
 */
public class TimeSeriesOutputTransition extends OutputTransitionBase{

    /**
     * The UID of this Class
     */
    private static final long serialVersionUID = 4178407570503098858L;
    
    /**
     * the logger, used to log exceptions and additonaly information
     */
    private static Logger log = Logger.getLogger(TimeSeriesOutputTransition.class);
    
    protected String domainLable = "Zeit [UTC]"; 
    
    /**
     * Constructor
     */
    public TimeSeriesOutputTransition() {
        super();
    }

    /**
     * @see de.intevation.gnv.transition.Transition#validate()
     */
    public boolean validate() {
        return true;
    }

   /**
    * @see de.intevation.gnv.transition.OutputTransition#out(java.lang.String, java.io.OutputStream)
    */
    public void out(String outputMode, OutputStream outputStream) throws TransitionException {
        log.debug("TimeSeriesOutputTransition");
        try {
            this.advance(); 
            Collection<KeyValueDescibeData> parameters = this.getParameters();
            Collection<KeyValueDescibeData> measurements = this.getMeasurements();
            ChartStyle chartStyle = this.creatStyle(600,400);
            ChartLabels chartLables = new ChartLabels(this.getSelectedFeatureName(),this.domainLable);
            this.createChart(outputStream, parameters, measurements,
                    chartStyle, chartLables);
        } catch (IOException e) {
            log.error(e,e);
            throw new TransitionException(e);
        } catch (TechnicalChartException e) {
            log.error(e,e);
            throw new TransitionException(e);
        }
    }

    
    protected String getSelectedFeatureName(){
        String collectionName = "featureid"; // TODO: Konfigurierbar machen
        Collection<KeyValueDescibeData> values =  this.getCollection(collectionName);
        if (values != null){
            Iterator<KeyValueDescibeData> it = values.iterator();
            while(it.hasNext()){
                KeyValueDescibeData data = it.next();
                if (data.isSelected()){
                    return data.getValue();
                }
            }
        }
        return null;
    }
    /**
     * @param outputStream
     * @param parameters
     * @param measurements
     * @param timeSeriesName
     * @param chartStyle
     * @param chartLables
     * @throws IOException
     * @throws TechnicalChartException
     */
    protected void createChart(OutputStream outputStream,
            Collection<KeyValueDescibeData> parameters,
            Collection<KeyValueDescibeData> measurements,
            ChartStyle chartStyle, ChartLabels chartLables) throws IOException,
            TechnicalChartException {
        ChartFactory chartFactory = new ChartFactory();
        chartFactory.createSimpleTimeSeriesChart(chartLables, chartStyle,
                                                 parameters, measurements, 
                                                 outputStream, this.chartResult);
    }

    /**
     * @see de.intevation.gnv.transition.TransitionBase#purifyResult(java.util.Collection)
     */
    @Override
    protected void purifyResult(Collection<Result> result) {
        this.chartResult = result;
    }
    
    protected ChartStyle creatStyle(int witdh, int height){
        // TODO Konfigurierbar machen
        de.intevation.gnv.chart.Insets lInsets = new de.intevation.gnv.chart.Insets(5d, 5d, 5d, 5d);
        Dimension lChartSize = new Dimension(witdh, height);
        return new ChartStyle(Color.white, new Color(230, 230, 230), Color.white, Color.white, true, true, lInsets, lChartSize);
    }
    
    protected Collection<KeyValueDescibeData> getParameters(){
        String collectionName = "parameterid"; // TODO: Konfigurierbar machen
        return this.getCollection(collectionName);
    }
    
    protected Collection<KeyValueDescibeData> getMeasurements(){
        String collectionName = "measurementid"; // TODO: Konfigurierbar machen
        return this.getCollection(collectionName);
    }

    /**
     * @param collectionName
     * @return
     */
    protected Collection<KeyValueDescibeData> getCollection(
            String collectionName) {
        Iterator<Object> it = this.descibeData.iterator();
        while (it.hasNext()){
           
           Object o = it.next();
           
           if (o instanceof NamedCollection<?>){
               NamedCollection<KeyValueDescibeData> nc = (NamedCollection<KeyValueDescibeData>)o;
               if (nc.getName().equals(collectionName)){
                   return nc;
               }
           }
        }
        return null;
    }
}