/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2007-2011, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotools.gce.imagemosaic.properties.numeric;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.geotools.factory.GeoTools;
import org.geotools.gce.imagemosaic.properties.PropertiesCollectorSPI;
import org.geotools.gce.imagemosaic.properties.RegExPropertiesCollector;
import org.geotools.util.Converter;
import org.geotools.util.NumericConverterFactory;
import org.geotools.util.logging.Logging;
import org.opengis.feature.simple.SimpleFeature;

abstract class NumericFileNameExtractor <N extends Number & Comparable<N>> extends RegExPropertiesCollector {
    
    final static NumericConverterFactory factory = new NumericConverterFactory();
    
    static class IntegerFileNameExtractor extends NumericFileNameExtractor<Integer>{

        public IntegerFileNameExtractor(PropertiesCollectorSPI spi, List<String> propertyNames,
                String regex) {
            super(spi, propertyNames, regex, Integer.class);
        }
        
    }
    
    static class ShortFileNameExtractor extends NumericFileNameExtractor<Short>{

        public ShortFileNameExtractor(PropertiesCollectorSPI spi, List<String> propertyNames,
                String regex) {
            super(spi, propertyNames, regex, Short.class);
        }
        
    }
    
    static class DoubleFileNameExtractor extends NumericFileNameExtractor<Double>{

        public DoubleFileNameExtractor(PropertiesCollectorSPI spi, List<String> propertyNames,
                String regex) {
            super(spi, propertyNames, regex, Double.class);
        }
        
    }
    
    static class FloatFileNameExtractor extends NumericFileNameExtractor<Float>{

        public FloatFileNameExtractor(PropertiesCollectorSPI spi, List<String> propertyNames,
                String regex) {
            super(spi, propertyNames, regex, Float.class);
        }
        
    }    
    
    static class ByteFileNameExtractor extends NumericFileNameExtractor<Byte>{

        public ByteFileNameExtractor(PropertiesCollectorSPI spi, List<String> propertyNames,
                String regex) {
            super(spi, propertyNames, regex, Byte.class);
        }
        
    }    
    
    static class LongFileNameExtractor extends NumericFileNameExtractor<Long>{

        public LongFileNameExtractor(PropertiesCollectorSPI spi, List<String> propertyNames,
                String regex) {
            super(spi, propertyNames, regex, Long.class);
        }
        
    }  
    
	private final static Logger LOGGER= Logging.getLogger(NumericFileNameExtractor.class);


        private Class<? extends Number> targetClasse;
        
        private Converter converter;
        
	public NumericFileNameExtractor(
			PropertiesCollectorSPI spi,
			List<String> propertyNames,
			String regex,
			final Class<N> targetClass) {
		super(spi,  propertyNames,regex);
		
                this.targetClasse = targetClass;
                this.converter = factory.createConverter(String.class, targetClasse, GeoTools.getDefaultHints());
//                if (targetClasse != null) {
//                    // look up a converter
//                    final Set<ConverterFactory> converters = Converters.getConverterFactories(String.class, targetClasse);
//                    if (!converters.isEmpty()) {
//                        this.converter = converters.iterator().next().createConverter(String.class, targetClasse, GeoTools.getDefaultHints());
//                        return;
//                    }
//                    throw new IllegalArgumentException("Unable to find a proper converter from String to the class:" + targetClasse);
//                }

	}

	@Override
	public void setProperties(SimpleFeature feature) {
		
		// get all the matches and convert them in times
		final List<Number> values= new ArrayList<Number>();
		for(String match:getMatches()){
			// try to convert to date
			try {
				values.add(converter.convert(match,targetClasse));
			} catch (Exception e) {
				if(LOGGER.isLoggable(Level.INFO))
					LOGGER.log(Level.INFO,e.getLocalizedMessage(),e);
			}
			
		}
		
		// set the properties, if we have some
                if(values.size()<=0){
                    if(LOGGER.isLoggable(Level.FINE))
                        LOGGER.fine("No matches found for this property extractor:");
                }		
		int index=0;
		for(String propertyName:getPropertyNames()){
			// set the property
			feature.setAttribute(propertyName, values.get(index++));
			
			// do we have more dates?
			if(index>=values.size())
				return;
		}
	}

}