// This file is part of libigl, a simple c++ geometry processing library.
// 
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
// 
// This Source Code Form is subject to the terms of the Mozilla Public License 
// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
// obtain one at http://mozilla.org/MPL/2.0/.
#include "launch_medit.h"
#include "writeMESH.h"
#include <cstdio>
#include <iostream>
#include <string>
#include <sstream>

#define MEDIT_PATH "/opt/local/bin/medit"
#define TEMP_MESH_FILE "/var/tmp/temp.mesh"
#define TEMP_MEDIT_FILE "/var/tmp/temp.medit"

template <typename DerivedV, typename DerivedT, typename DerivedF>
IGL_INLINE int igl::launch_medit(
  const Eigen::MatrixBase<DerivedV> & V, 
  const Eigen::MatrixBase<DerivedT> & T,
  const Eigen::MatrixBase<DerivedF> & F,
  const bool wait)
{
  // Build medit command, end with & so command returns without waiting
  std::stringstream command;
  command<<MEDIT_PATH<<" "<<TEMP_MESH_FILE<<" "<<TEMP_MEDIT_FILE;
  if(!wait)
  {
    command<<" &";
  }
  bool mesh_saved = writeMESH(TEMP_MESH_FILE,V,T,F);
  if(!mesh_saved)
  {
    return -1;
  }
  // Write default medit options
  const std::string default_medit_file_contents =
    "BackgroundColor 1 1 1\n"
    "LineColor 0 0 0\n"
    "WindowSize 1024 800\n"
    "RenderMode shading + lines\n";
  FILE * fp = fopen(TEMP_MEDIT_FILE,"w");
  if(fp == NULL)
  {
    std::cerr<<"^"<<__FUNCTION__<<": Could not write to "<<TEMP_MEDIT_FILE<<std::endl;
    return -1;
  }
  fprintf(fp,"%s",default_medit_file_contents.c_str());
  fclose(fp);

  try
  {
    return system(command.str().c_str());
  }catch(int e)
  {
    (void)e;
    std::cerr<<"^"<<__FUNCTION__<<": Calling to medit crashed..."<<std::endl;
    return -1;
  }
  // Could clean up and delete these files but not really worth it
}

#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
template int igl::launch_medit<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(Eigen::MatrixBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, bool);
#endif