package btools.mapcreator;

import java.io.DataInputStream;
import java.io.EOFException;
import java.io.File;
import java.util.HashMap;

import btools.util.DenseLongMap;
import btools.util.TinyDenseLongMap;

/**
 * WayCutter does 2 step in map-processing:
 *
 * - cut the way file into 45*30 - pieces
 * - enrich ways with relation information
 *
 * @author ab
 */
public class RelationStatistics extends MapCreatorBase
{
  public static void main(String[] args) throws Exception
  {
    System.out.println("*** RelationStatistics: count relation networks");
    if (args.length != 1)
    {
      System.out.println("usage: java WayCutter <relation-file>" );

      return;
    }
    new RelationStatistics().process( new File( args[0] ) );
  }

  public void process( File relationFileIn ) throws Exception
  {
	HashMap<String,long[]> relstats = new HashMap<String,long[]>();
	  
    DataInputStream dis = createInStream( relationFileIn );
    try
    {
      for(;;)
      {
        long rid = readId( dis );
        String network = dis.readUTF();
        int waycount = 0;
        for(;;)
        {
          long wid = readId( dis );
          if ( wid == -1 ) break;
          waycount++;
        }
      
        long[] stat = relstats.get( network );
        if ( stat == null )
        {
          stat = new long[2];
    	  relstats.put( network,  stat );  
        }
        stat[0]++;
        stat[1] += waycount;
      }
    }
    catch( EOFException eof )
    {
      dis.close();
    }
    for( String network : relstats.keySet() )
    {
    	long[] stat = relstats.get( network );
        System.out.println( "network: " + network + " has " + stat[0] + " relations with " + stat[1] + " ways" );
    }
  }


}