/*  FABBER - Fast ASL and BOLD Bayesian Estimation Routine

    Adrian Groves and Michael Chappell, FMRIB Image Analysis Group

    Copyright (C) 2007-2008 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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    You are not permitted under this Licence to use this Software
    commercially. Use for which any financial return is received shall be
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    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
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    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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#include <iostream>
#include <exception>
#include <stdexcept>
#include <map>
#include <string>
#include "inference.h"
using namespace std;
using namespace MISCMATHS;

#include "easylog.h"
using namespace Utilities;

/*** Function declarations ***/

void Usage(const string& errorString = "");

/*** Function implementations ***/

int main(int argc, char** argv)
{
  bool gzLog = false;
  try
    {
      cout << "------------------\n";
      cout << "Welcome to FABBER v2.0" << endl;
      //cout << "Welcome to FABBER development version (1.9)" << endl;

      EasyOptions args(argc, argv);

      if (args.ReadBool("help") || argc==1) 
        { 
            string model = args.ReadWithDefault("model","");
            if (model == "")
                Usage();
            else
                FwdModel::ModelUsageFromName(model, args);
                                 
            return 0; 
        }

      if (args.ReadBool("params"))
	{ 
	  string outputDir = args.ReadWithDefault("output",".");
	  EasyLog::StartLog(outputDir,false); 
	  ofstream paramFile(( EasyLog::GetOutputDirectory() + "/paramnames.txt").c_str());
	  vector<string> paramNames;
	  FwdModel* model;
	  model = FwdModel::NewFromName(args.Read("model"),args);
	  model->NameParams(paramNames);
	  for (unsigned i = 0; i < paramNames.size(); i++)
	    {
	      LOG << "      " << paramNames[i] << endl;
	      paramFile << paramNames[i] << endl;
	    }
	  paramFile.close();

	  return 0;
	}

      EasyLog::StartLog(
        args.Read("output", "Must specify an output directory, for example: --output=mytestrun"),
        args.ReadBool("overwrite"));

        
      LOG_ERR("Logfile started: " << EasyLog::GetOutputDirectory() 
	          << "/logfile" << endl);

      time_t startTime;
      time(&startTime);
      LOG_ERR("Start time: " << ctime(&startTime));

      // Diagnostic information: software versions
      // This only versions this file... should really use all.
//      LOG_ERR("FABBER development revision: $Id: fabber.cc,v 1.25 2011/11/16 11:17:42 chappell Exp $\n");
      LOG_ERR("FABBER release v2.0 \n");
      LOG << "Command line and effective options:\n" << args.Read("") << endl;
      LOG << "--output='" << EasyLog::GetOutputDirectory() << "'" << endl;
      LOG << args << "--------------------" << endl;

      // Start timing/tracing if requested
      bool recordTimings = false;
  
      if (args.ReadBool("debug-timings")) 
        { recordTimings = true; Tracer_Plus::settimingon(); }
      if (args.ReadBool("debug-instant-stack")) 
        { Tracer_Plus::setinstantstackon(); } // instant stack isn't used?
      if (args.ReadBool("debug-running-stack")) 
        { Tracer_Plus::setrunningstackon(); }
      gzLog = args.ReadBool("gzip-log");

      Tracer_Plus tr("FABBER main (outer)");
      // can't start it before this or it segfaults if an exception is thown with --debug-timings on.

      // Start a new tracer for timing purposes
      { Tracer_Plus tr2("FABBER main()");

      InferenceTechnique* infer = 
        InferenceTechnique::NewFromName(args.Read("method"));

      infer->Setup(args);
      infer->SetOutputFilenames(EasyLog::GetOutputDirectory());
      
      DataSet allData;
      allData.LoadData(args);

      // Arguments should all have been used by now, so complain if there's anything left.
      args.CheckEmpty();   
      
      // Calculations
      infer->DoCalculations(allData);
      infer->SaveResults(allData);
      delete infer;
      
      LOG_ERR("FABBER is all done." << endl);

      time_t endTime;
      time(&endTime);
      LOG << "Start time: " << ctime(&startTime);   // Bizarrely, ctime() ends with a \n.
      LOG << "End time: " << ctime(&endTime);
      LOG_ERR("Duration: " << endTime-startTime << " seconds." << endl);

      } // End of timings
     
      if (recordTimings) {
        tr.dump_times(EasyLog::GetOutputDirectory());
        LOG_ERR("Timing profile information recorded to " 
		<< EasyLog::GetOutputDirectory() << "/timings.html" << endl);
      }

      Warning::ReissueAll();

      cout << "Logfile was: " << EasyLog::GetOutputDirectory() << (gzLog ? "/logfile.gz" : "/logfile") << endl;
      EasyLog::StopLog(gzLog);

      return 0;
    }
  catch (const Invalid_option& e)
    {
      Warning::ReissueAll();
      LOG_ERR_SAFE("Invalid_option exception caught in fabber:\n  " << Exception::what() << endl);
      Usage(Exception::what());
    }
  catch (const exception& e)
    {
      Warning::ReissueAll();
      LOG_ERR_SAFE("STL exception caught in fabber:\n  " << e.what() << endl);
    }
  catch (Exception)
    {
      Warning::ReissueAll();
      LOG_ERR_SAFE("NEWMAT exception caught in fabber:\n  " 
	      << Exception::what() << endl);
    }
  catch (...)
    {
      Warning::ReissueAll();
      LOG_ERR_SAFE("Some other exception caught in fabber!" << endl);
    }
  
  if (EasyLog::LogStarted())
    {
      // Only gzip the logfile if we exited normally.
      cout << "Logfile was: " << EasyLog::GetOutputDirectory() << "/logfile" << endl;
      EasyLog::StopLog();

      //cout << "Logfile was: " << EasyLog::GetOutputDirectory() << (gzLog ? "/logfile.gz" : "/logfile") << endl;
      //EasyLog::StopLog(gzLog);
    }

  return 1;
}

void Usage(const string& errorString)
{
    cout << "\n\nUsage: fabber <arguments>\n"
     << "Arguments are mandatory unless they appear in [brackets].\n"
     << "Use -@ argfile to read additional arguments from a text file.\n\n";

    cout << "  [--help] : print this usage message\n"
     << "  --output=/path/to/output : put output here (including logfile)\n"
     << "  --method={vb|spatialvb} : use VB (or VB with spatial priors)\n"
     << "  [--max-iterations=NN] : number of iterations of VB to use (default: 10)\n"
     << "  [--data-order={interleave|concatenate|singlefile}] : should time points from multiple data "
     << "be interleaved (e.g. TE1/TE2) or left in order? (default: interleave)\n"
     << "  --data1=file1, [--data2=file2]. (use --data=file instead if --data-order=singlefile)\n"
     << "  --mask=maskfile : inference will only be performed where mask value > 0\n"
     << "  --model={quipss2|q2tips-dualecho|grase} : forward model to use. "
//     << "  --model={quipss2|simple|grase} : forward model to use. "
     << "For model parameters use fabber --help --model=<model_of_interest>\n"
     << "  --noise={ar1|white} : Noise model to use\n"
     << "    ar1: two AR(1) models (optional cross-linking between TE1 & TE2)\n"
     << "      [--ar1-cross-terms={dual|same|none}] : two types of cross-linking, or none (default: dual)\n"
     << "    white: white noise model, optionally with different noise variances at some data points\n"
     << "      [--noise-pattern=<phi_index_pattern>] : repeating pattern of noise variances for each data point "
     << "(e.g. --noise-pattern=12 gives odd and even data points different noise variances)\n"
     << "  [--save-model-fit] and [--save-residuals] : Save model fit/residuals files\n"
     << "  [--print-free-energy] : Calculate & dump F to the logfile after each update\n"
     << "  [--allow-bad-voxels] : Skip to next voxel if a numerical exception occurs (don't stop)\n"
     << "For spatial priors (using --method=spatialvb):\n"
     << "  --param-spatial-priors=<choice_of_prior_forms>: Specify a type of prior to use for each"
     << " forward model parameter.  One letter per parameter.  S=spatial, N=nonspatial, D=Gaussian-process-based combined prior\n"
     << "  --fwd-initial-prior=<prior_vest_file>: specify the nonspatial prior distributions on the forward model parameters.  The vest file is the covariance matrix supplemented by the prior means; see the documentation for details.  Very important if 'D' prior is used.\n"
     << endl;


    if (errorString.length() > 0)
        cout << "\nImmediate cause of error: " << errorString << endl;
}