/*  fslswapdim.cc

    Mark Jenkinson and Matthew Webster, FMRIB Image Analysis Group

    Copyright (C) 2003-2008 University of Oxford  */

/*  Part of FSL - FMRIB's Software Library
    http://www.fmrib.ox.ac.uk/fsl
    fsl@fmrib.ox.ac.uk
    
    Developed at FMRIB (Oxford Centre for Functional Magnetic Resonance
    Imaging of the Brain), Department of Clinical Neurology, Oxford
    University, Oxford, UK
    
    
    LICENCE
    
    FMRIB Software Library, Release 5.0 (c) 2012, The University of
    Oxford (the "Software")
    
    The Software remains the property of the University of Oxford ("the
    University").
    
    The Software is distributed "AS IS" under this Licence solely for
    non-commercial use in the hope that it will be useful, but in order
    that the University as a charitable foundation protects its assets for
    the benefit of its educational and research purposes, the University
    makes clear that no condition is made or to be implied, nor is any
    warranty given or to be implied, as to the accuracy of the Software,
    or that it will be suitable for any particular purpose or for use
    under any specific conditions. Furthermore, the University disclaims
    all responsibility for the use which is made of the Software. It
    further disclaims any liability for the outcomes arising from using
    the Software.
    
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    negligence) which arise directly or indirectly from the use of the
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    transmitted product. You may be held legally responsible for any
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    You are not permitted under this Licence to use this Software
    commercially. Use for which any financial return is received shall be
    defined as commercial use, and includes (1) integration of all or part
    of the source code or the Software into a product for sale or license
    by or on behalf of Licensee to third parties or (2) use of the
    Software or any derivative of it for research with the final aim of
    developing software products for sale or license to a third party or
    (3) use of the Software or any derivative of it for research with the
    final aim of developing non-software products for sale or license to a
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    innovation@isis.ox.ac.uk quoting reference DE/9564. */


#include "newimage/newimageall.h"
#include "newimage/fmribmain.h"

using namespace NEWIMAGE;

void print_usage(const string& progname) {
  cout << "Usage: " << progname << " <input> <a> <b> <c> [output] [--checkLR]" << endl;
  cout << endl;
  cout << "  where a,b,c represent the new x,y,z axes in terms of the" << endl;
  cout << "  old axes.  They can take values of -x,x,y,-y,z,-z" << endl;
  cout << "  --checkLR  is an option that checks if the specified arguments lead to a Left-Right swap or not - it cannot be used with an output name" << endl;
  cout << "  e.g.  " << progname << " invol y x -z outvol" << endl;
}


template <class T>
int fmrib_main(int argc,char *argv[])
{
  string newx=argv[2], newy=argv[3], newz=argv[4];
  string inname=argv[1];
  string outname="";
  bool showmat=false;
  bool checkonly=false;
  if (argc==6) {
    outname=argv[5];
    if (outname=="--checkLR") {
      outname="";
      checkonly=true;
    }
    showmat=false;
  } else {
    showmat=true;
  }

  volume4D<T> invol;
  read_orig_volume4D(invol,inname);

  Matrix affmat;
  affmat = invol.swapmat(newx,newy,newz);

  if (showmat) {
    cout << affmat << endl;
  }

  if (checkonly) {
    if (affmat.Determinant()<0.0) cout << "LR orientation changed" << endl;
    else cout << "LR orientation preserved" << endl;
    return 0;
  } 

  if (affmat.Determinant()<0.0) {
    cout << "WARNING:: Flipping Left/Right orientation (as det < 0)" << endl;
  }
  
  invol.swapdimensions(newx,newy,newz,true);

  int retval=0;
  if (outname!="") {
    retval = save_orig_volume4D(invol,outname);
  }
  return retval;
}

  
int main(int argc,char *argv[])
{
  string progname=argv[0];
  if (argc<5) { 
    print_usage(progname);
    return -1; 
  }
  
  string inname = argv[1];
  // call the templated main
  return call_fmrib_main(dtype(inname),argc,argv);
}