/**
 * Manage rd5 diff-file creation
 *
 * @author ab
 */
package btools.mapaccess;

import java.io.File;

final public class Rd5DiffValidator
{
  public static void main( String[] args ) throws Exception
  {
    validateDiffs( new File( args[0] ),new File( args[1] ) );
  }

  /**
   * Validate diffs for all DF5 files
   */
  public static void validateDiffs( File oldDir, File newDir ) throws Exception
  {
    File oldDiffDir = new File( oldDir, "diff" );
    File newDiffDir = new File( newDir, "diff" );

    File[] filesNew = newDir.listFiles();
    
    for( File fn : filesNew )
    {
      String name = fn.getName();
      if ( !name.endsWith( ".rd5" ) )
      {
        continue;
      }
      if ( fn.length() < 1024*1024 )
      {
        continue; // expecting no diff for small files
      }
      String basename = name.substring( 0, name.length() - 4 );
      File fo = new File( oldDir, name );
      if ( !fo.isFile() )
      {
        continue;
      }

      // calculate MD5 of old file
      String md5 = Rd5DiffManager.getMD5( fo );

      String md5New = Rd5DiffManager.getMD5( fn );

      System.out.println( "name=" + name + " md5=" + md5 );

      File specificNewDiffs = new File( newDiffDir, basename );

      String diffFileName = md5 + ".df5";
      File diffFile = new File( specificNewDiffs, diffFileName );

      File fcmp = new File( oldDir, name + "_tmp" );

      // merge old file and diff
      Rd5DiffTool.recoverFromDelta( fo, diffFile, fcmp, new Rd5DiffTool() );
      String md5Cmp = Rd5DiffManager.getMD5( fcmp );

      if ( !md5Cmp.equals( md5New ) )
      {
        throw new RuntimeException( "**************** md5 mismatch!! *****************" );
      }
    }
  }

}