package NET.worlds.scape;

import NET.worlds.network.URL;
import java.io.File;
import java.util.Hashtable;
import java.util.StringTokenizer;

public abstract class TextureDecoder {
   protected static Hashtable handlers = new Hashtable();
   private static TextureDecoder defaultDecoder;
   private static String allExts;

   static {
      addHandler(defaultDecoder = new FileTextureDecoder());
      addHandler(new StandardTextureDecoder());
      addHandler(new ScapePicTextureDecoder());
   }

   protected abstract String getExts();

   protected abstract Texture read(String var1, String var2);

   private static void addHandler(TextureDecoder decoder) {
      StringTokenizer e = new StringTokenizer(decoder.getExts(), ";");

      while (e.hasMoreTokens()) {
         String ext = e.nextToken().toLowerCase();
         handlers.put(ext, decoder);
         if (allExts == null) {
            allExts = ext;
         } else {
            allExts = allExts + File.pathSeparator + ext;
         }
      }
   }

   public static String getAllExts() {
      return allExts;
   }

   public static String getJavaExts() {
      return new StandardTextureDecoder().getExts();
   }

   public static Texture decode(URL url, String filename) {
      return decode(url, url.getAbsolute(), filename);
   }

   public static Texture decode(URL url, String lookupName, String filename) {
      Texture tex = FileTexture.dictLookup(lookupName);
      if (tex != null) {
         return tex;
      } else {
         String urlName = url.getInternal();
         int delim = urlName.lastIndexOf(46);
         int lastPath = urlName.lastIndexOf(47);
         lastPath = Math.max(lastPath, urlName.lastIndexOf(92));
         lastPath = Math.max(lastPath, urlName.lastIndexOf(58));
         if (delim > lastPath) {
            String ext = urlName.substring(delim + 1).toLowerCase();
            TextureDecoder decoder = (TextureDecoder)handlers.get(ext);
            if (decoder != null) {
               Texture t = decoder.read(lookupName, filename);
               if (t.textureID != 0) {
                  return t;
               }
            }
         }

         return null;
      }
   }
}