package jmetest.monkeymahjongg.game;
 
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.logging.Logger;
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.parsers.SAXParserFactory;
 import org.xml.sax.Attributes;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 import org.xml.sax.XMLReader;
 import org.xml.sax.helpers.DefaultHandler;
 import static java.util.logging.Level.*; 
 
 /**
  *
  * @author Gronau
  */
 public final class LevelProvider {
   
     private final static SAXParserFactory PARSER_FACTORY = SAXParserFactory.newInstance();
 
     
     private LevelProvider() {}
     
     public static Level load(String fileName) {
         try {
             XMLReader xmlReader = PARSER_FACTORY.newSAXParser().getXMLReader();
             LevelHandler handler = new LevelHandler();
             xmlReader.setContentHandler(handler);
             InputSource is = new InputSource(new java.io.FileInputStream(fileName));
             xmlReader.parse(is);
             return new Level(handler.name, 
                              handler.width, 
                              handler.height, 
                              handler.layers, 
                              handler.tiles);
         } catch (ParserConfigurationException ex) {
             Logger.getLogger(LevelProvider.class.getName()).log(SEVERE, null, ex);
             throw new RuntimeException(ex);
         } catch (IOException ex) {
             Logger.getLogger(LevelProvider.class.getName()).log(SEVERE, null, ex);
             throw new RuntimeException(ex);
         } catch (SAXException ex) {
             Logger.getLogger(LevelProvider.class.getName()).log(SEVERE, null, ex);
             throw new RuntimeException(ex);
         }      
 } 
 
 
 private static class LevelHandler extends DefaultHandler {
 
 private final List<Integer> list = new ArrayList<Integer>(144);
 
 private int line = 0;
 private String name;
 private int width;
 private int height;
 private int layers;
 private Map<Coordinate, TileData> tiles = new HashMap<Coordinate, TileData>();
 
 public LevelHandler() {
 for (int i = 0; i < 144; i++) {
 list.add(i);
 }
 Collections.shuffle(list);
 }
 
 @Override
 public void startElement(String uri, String localName, String qName, Attributes attributes) {
 if ("mahjongg".equals(qName)) {
 name = attributes.getValue("name");
 width = Integer.valueOf(attributes.getValue("width"));
 height = Integer.valueOf(attributes.getValue("height"));
 layers = Integer.valueOf(attributes.getValue("layers"));
 } else if ("line".equals(qName)) {
 final String data = attributes.getValue("data");
 for (int x = 0; x < data.length(); x++) {
 final char c = data.charAt(x);
 if ('1' <= c && c <= '9') {
 final int n = c - '1';
 for (int z = 0; z <= n; z++) {
 final Coordinate co = Coordinate.at(x, line, z);
 if (! tiles.containsKey(co.add(-1,-1, 0))
 && ! tiles.containsKey(co.add( 0,-1, 0))
 && ! tiles.containsKey(co.add( 1,-1, 0)) 
 && ! tiles.containsKey(co.add(-1, 0, 0))) {
 tiles.put(co, new TileData(x, line, z, list.remove(0)));
 }
 }
 }
 }
 line++;
 }
 }
 }
 }