//******************************************************************************
   //
   // Title:       Force Field X.
   // Description: Force Field X - Software for Molecular Biophysics.
   // Copyright:   Copyright (c) Michael J. Schnieders 2001-2025.
   //
   // This file is part of Force Field X.
   //
   // Force Field X is free software; you can redistribute it and/or modify it
  // under the terms of the GNU General Public License version 3 as published by
  // the Free Software Foundation.
  //
  // Force Field X is distributed in the hope that it will be useful, but WITHOUT
  // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  // FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
  // details.
  //
  // You should have received a copy of the GNU General Public License along with
  // Force Field X; if not, write to the Free Software Foundation, Inc., 59 Temple
  // Place, Suite 330, Boston, MA 02111-1307 USA
  //
  // Linking this library statically or dynamically with other modules is making a
  // combined work based on this library. Thus, the terms and conditions of the
  // GNU General Public License cover the whole combination.
  //
  // As a special exception, the copyright holders of this library give you
  // permission to link this library with independent modules to produce an
  // executable, regardless of the license terms of these independent modules, and
  // to copy and distribute the resulting executable under terms of your choice,
  // provided that you also meet, for each linked independent module, the terms
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  // module which is not derived from or based on this library. If you modify this
  // library, you may extend this exception to your version of the library, but
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  // exception statement from your version.
  //
  //******************************************************************************
  package ffx.xray.commands;
  
  import ffx.algorithms.cli.AlgorithmsCommand;
  import ffx.numerics.Potential;
  import ffx.potential.MolecularAssembly;
  import ffx.utilities.FFXBinding;
  import ffx.xray.DiffractionData;
  import ffx.xray.cli.XrayOptions;
  import ffx.xray.parsers.MTZWriter;
  import ffx.xray.parsers.MTZWriter.MTZType;
  import org.apache.commons.configuration2.CompositeConfiguration;
  import picocli.CommandLine.Command;
  import picocli.CommandLine.Mixin;
  import picocli.CommandLine.Parameters;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.stream.Collectors;
  
  import static org.apache.commons.io.FilenameUtils.getBaseName;
  
  /**
   * The X-ray ComputeFc script.
   * <br>
   * Usage:
   * <br>
   * ffxc xray.ComputeFc [options] &lt;filename [file2...]&gt;
   */
  @Command(description = " Write out computed structure factors.", name = "xray.ComputeFc")
  public class ComputeFc extends AlgorithmsCommand {
  
    @Mixin
    private XrayOptions xrayOptions;
  
    /**
     * One or more filenames.
     */
    @Parameters(arity = "1..*", paramLabel = "files", description = "PDB and Diffraction input files.")
    private List<String> filenames;
  
    private MolecularAssembly[] molecularAssemblies;
    private DiffractionData diffractionData;
  
    /**
     * ComputeFc constructor.
     */
    public ComputeFc() {
      super();
    }
  
    /**
     * ComputeFc constructor that sets the command line arguments.
     * @param args Command line arguments.
     */
    public ComputeFc(String[] args) {
      super(args);
    }
  
    /**
     * ComputeFc constructor.
     * @param binding The Binding to use.
    */
   public ComputeFc(FFXBinding binding) {
     super(binding);
   }
 
   @Override
   public ComputeFc run() {
 
     if (!init()) {
       return this;
     }
 
     xrayOptions.init();
 
     String filename;
     if (filenames != null && !filenames.isEmpty()) {
       molecularAssemblies = algorithmFunctions.openAll(filenames.get(0));
       activeAssembly = molecularAssemblies[0];
       filename = filenames.get(0);
     } else if (activeAssembly == null) {
       logger.info(helpString());
       return this;
     } else {
       molecularAssemblies = new MolecularAssembly[]{activeAssembly};
       filename = activeAssembly.getFile().getAbsolutePath();
     }
 
     // Load parsed X-ray properties.
     CompositeConfiguration properties = activeAssembly.getProperties();
     xrayOptions.setProperties(parseResult, properties);
 
     // Set up diffraction data (can be multiple files)
     diffractionData = xrayOptions.getDiffractionData(filenames, molecularAssemblies, properties);
 
     logger.info("\n Running xray.ComputeFc on " + filename);
 
     // Compute structure factors
     diffractionData.computeAtomicDensity();
     diffractionData.getReflectionList();
 
     // Output Fcs
     MTZWriter mtzWriter = new MTZWriter(diffractionData.getReflectionList()[0],
         diffractionData.getRefinementData()[0], getBaseName(filename) + "_fc.mtz", MTZType.FCONLY);
 
     mtzWriter.write();
     return this;
   }
 
   @Override
   public List<Potential> getPotentials() {
     if (molecularAssemblies == null) {
       return new ArrayList<>();
     } else {
       return Arrays.stream(molecularAssemblies)
           .filter(a -> a != null)
           .map(a -> a.getPotentialEnergy())
           .filter(e -> e != null)
           .collect(Collectors.toList());
     }
   }
 
   @Override
   public boolean destroyPotentials() {
     return diffractionData == null ? true : diffractionData.destroy();
   }
 }