/*
 * Script to change a keyword value in a set of FITS files.
 */
var inputDirectory = "K:/cache/PI/21P/2018-09-07/registered/";
var outputDirectory = "K:/cache/PI/21P/2018-09-07/registered/repl/";
var keywordName = "DATE-OBS";

// ----------------------------------------------------------------------------

if ( inputDirectory.length == 0 )
   throw new Error( "Must specify an input directory" ); 
if ( outputDirectory.length == 0 )
   throw new Error( "Must specify an output directory" ); 
if ( keywordName.length == 0 )
   throw new Error( "Must specify a keyword name" ); 

if ( !inputDirectory.endsWith( '/' ) )
   inputDirectory += '/';
if ( !outputDirectory.endsWith( '/' ) )
   outputDirectory += '/';

for ( let D = searchDirectory( inputDirectory + "*.xisf", false/*recursive*/ ), i = 0; i < D.length; ++i )
{
   let w = ImageWindow.open( D[i] );
   let k = w[0].keywords;
   let found = false;
   for ( let j = 0; j < k.length; ++j )
   {
      k[j].trim();
      if ( k[j].name == keywordName )
      {
          let time = k[j].strippedValue.slice(0,-1)
          console.writeln(time)
          k[j].value = time;
          found = true;
          break;
      }
   }
   if ( found )
   {
      console.writeln( "<end><cbr>" + D[i] );
      w[0].keywords = k;
      w[0].saveAs( outputDirectory + File.extractNameAndSuffix( D[i] ),
                   false/*queryOptions*/,
                   false/*allowMessages*/,
                   false/*strict*/,
                   true/*verifyOverwrite*/ );
   }
   w[0].forceClose();
}