package usda.weru.gis.data;

import org.apache.log4j.Logger;
import org.geotools.data.FeatureSource;
import org.geotools.util.factory.Hints;
import org.geotools.filter.text.cql2.CQL;
import org.geotools.filter.text.cql2.CQLException;
import org.opengis.feature.Feature;
import org.opengis.filter.Filter;
import org.opengis.filter.FilterFactory2;
import usda.weru.weps.location.Site;
import usda.weru.weps.location.Site.Level1;

/**
 *
 * @author Joseph Levin <joelevin@weru.ksu.edu>
 */
public class SiteLevel1Lookup extends AbstractLookup<Site.Level1>{
    private static final Logger LOGGER = Logger.getLogger(SiteLevel1Lookup.class);

	/**
	 *
	 */
	public static final String COLUMN_NAME_0= "NAME_0";

	/**
	 *
	 */
	public static final String COLUMN_ID_1= "ID_1";

	/**
	 *
	 */
	public static final String COLUMN_NAME_1= "NAME_1";

	/**
	 *
	 */
	public static final String COLUMN_HASC_1 = "HASC_1";

	/**
	 *
	 * @param source
	 * @param feature
	 * @return
	 */
	@Override
    protected Level1 create(FeatureSource<?,?> source, Feature feature) {
        String hasc = getValue(feature, COLUMN_HASC_1, String.class);

        if(hasc == null || hasc.trim().isEmpty()){
            return null;
        }

        hasc = hasc.trim();
        
        return (Site.Level1) Site.valueOfHASC(hasc);
    }

	/**
	 *
	 * @return
	 */
	@Override
    protected Class<Level1> getSupportedClass() {
        return Site.Level1.class;
    }

	/**
	 *
	 * @param hints
	 * @param factory
	 * @param source
	 * @param site
	 * @return
	 */
	@Override
    protected Filter createFilter(final Hints hints, final FilterFactory2 factory,
            final FeatureSource<?,?> source, final Site.Level1 site){
        try{
                                    
            String hasc = site.getHASC();
            
            if(hasc == null || hasc.isEmpty()){
                LOGGER.debug("Unable to create CQL query for site without hasc code.");
                return null;
            }
            
            
            //returns features that match the state and county
            String cql = COLUMN_HASC_1 + " = '" + hasc + "'";
            Filter filter = CQL.toFilter(cql);
            return filter;
        }
        catch(CQLException ce){
            LOGGER.warn("Unable to create CQL query for HASC shapefile.", ce);
            return null;
        }
    }


    @Override
    protected boolean supports(FeatureSource<?,?> source) {
        return hasColumn(source, COLUMN_NAME_0, String.class)
                && hasColumn(source, COLUMN_NAME_1, String.class)
                && hasColumn(source, COLUMN_ID_1, Integer.class)
                && hasColumn(source, COLUMN_HASC_1, String.class);
    }

}