#   EPLF computes the Electron Pair Localization Function
#   Copyright (C) 2009 Anthony SCEMAMA, CNRS
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program 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 this program; if not, write to the Free Software Foundation, Inc.,
#   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#   Anthony Scemama
#   LCPQ - IRSAMC - CNRS
#   Universite Paul Sabatier
#   118, route de Narbonne      
#   31062 Toulouse Cedex 4      
#   scemama@irsamc.ups-tlse.fr
#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

VERSION=[`. version ; echo $VERSION`]
AC_SUBST([VERSION])

AC_REVISION([$Revision: $VERSION $])

AC_PREREQ([2.50])

AC_INIT([EPLF], [], [scemama@irsamc.ups-tlse.fr],[eplf],[http://eplf.sourceforge.net])

AC_SYS_LONG_FILE_NAMES

EPLF_PATH=`pwd`
AC_SUBST(EPLF_PATH)

EXE=$EPLF_PATH/bin/eplf
AC_SUBST(EXE)

AC_CONFIG_SRCDIR([src/main.irp.f])
AC_CONFIG_FILES([make.config])
AC_PREFIX_DEFAULT([./])

AC_PROG_LN_S
AC_PROG_RANLIB
AC_PROG_CC


# Check for curl
AC_CHECK_PROGS([CURL],[curl],[])

######################################################
# Define download function
AC_DEFUN([AC_DOWNLOAD],[{
 # AC_DOWNLOAD ( VARIABLE, name, url )
 WHERE=
 if [[ ! -z $CURL ]] ; then
   echo ""
   echo "**************************"
   echo $1 is not installed
   echo "**************************"
   echo "Do you want to download it?"
   select x in yes no
   do
    if [[ ! -z $x ]] ; then
      break
    fi
   done
   if [[ $x == yes ]] ; then
      if [[ ! -d "Downloads" ]] ; then
        mkdir $EPLF_PATH/Downloads
      fi
      cd $EPLF_PATH/Downloads
      mkdir $EPLF_PATH/Downloads/tmp
      cd $EPLF_PATH/Downloads/tmp
      $CURL -L "$3" -o $2 && mv $2 .. && WHERE=$2
      cd $EPLF_PATH
      rm -rf $EPLF_PATH/Downloads/tmp
   fi
   if [[ ! -z $WHERE ]] ; then
      echo $2 was downloaded to Downloads/$WHERE.
      $1=1
   else
      AC_MSG_ERROR([$2 should be installed. You can download it at
    $3])
   fi
 else
    AC_MSG_ERROR([Please download $2 at
    $3])
 fi
}])

######################################################
# Check for python
AC_CHECK_PROGS([PYTHON],[python],[])
if [[ -z $PYTHON ]] ; then
  AC_MSG_ERROR([Python should be installed:
  http://www.python.org])
fi

######################################################
# IRPF90 compiler
AC_CHECK_PROGS([IRPF90],[irpf90],[])
if [[ -z $IRPF90 ]] ; then
  AC_DOWNLOAD([IRPF90],[irpf90.gz],[http://sourceforge.net/projects/irpf90/files/irpf90-1.1.57-noarch.exe.gz/download])
  gunzip Downloads/irpf90.gz
  mv Downloads/irpf90 bin/
  chmod +x bin/irpf90
  IRPF90=$EPLF_PATH/bin/irpf90
fi

######################################################
# EZFIO
EZFIO=`ls EZFIO*.tar.gz | tail -1`
if [[ -z $EZFIO ]] ; then
  AC_DOWNLOAD([EZFIO],[EZFIO.tar.gz],[http://sourceforge.net/projects/ezfio/files/latest])
  if [[ -z $EZFIO ]] ; then
    AC_MSG_ERROR([Download EZFIO.tar.gz into $PWD and run this configure script again.])
  fi
  mv Downloads/EZFIO*.tar.gz EZFIO.tar.gz
fi

######################################################
# Check for MPI
EPLF_HAS_MPI=0
if [[ -z "$STATIC" ]] ; then
  AC_CHECK_PROGS([MPIRUN],[mpirun mpiexec],[])
  if [[ ! -z $MPIRUN ]] ; then
    MPIRUN=`which $MPIRUN`
  fi

  AC_CHECK_PROGS([MPIFC],[mpif90],[])
  if [[ -z $MPIFC ]] ; then
    echo "**************************"
    echo "Warning: MPI not found. You can get OpenMPI at:"
    echo "http://www.open-mpi.org/software/ompi/v1.4/downloads/openmpi-1.4.1.tar.gz"
    echo "**************************"
  else
    EPLF_HAS_MPI=1
  fi
fi
AC_SUBST([EPLF_HAS_MPI])



# Test if Static zlib is present
# ------------------------------

AC_CHECK_LIB([z],[gzclose],[STATIC=1],[STATIC=0],[-static])
STATIC_LIB="../EZFIO/lib/libezfio_irp.a"
SHARED_LIB="-L../EZFIO/lib -lezfio"

# Test Fortran
# ------------

AC_LANG([Fortran])
AC_PROG_FC([mpif90 ifort gfortran],[Fortran 90])
AC_PROG_FC_C_O
AC_FC_SRCEXT([F90])
AC_FC_FREEFORM

case $FC in
    mpif90*)
       FCFLAGS="-O3"
       IRPF90="$IRPF90 -DMPI"
       ;;
    ifort*)
       FCFLAGS="-O3 -axT -ip"
       if test $STATIC == 1 ; then
         FCFLAGS="$FCFLAGS -static-intel -static-libgcc -static"
       fi
       ;;
    gfortran*)
       FCFLAGS="-O3 -ffast-math"
       if test $STATIC == 0 ; then
         FCFLAGS="$FCFLAGS -static-libgcc -static"
       fi
       ;;
esac

AC_SUBST(IRPF90)

# Write make.config

if [[ $STATIC = 1 ]] ; then
  LIB="$STATIC_LIB -lz"
else   
  LIB="$SHARED_LIB -lz"
  AC_MSG_WARN([
=====================================================

  Using shared library. Add
   $EPLF_PATH/EZFIO/lib/
  to the LD_LIBRARY_PATH environment variable.

=====================================================
])
fi
AC_SUBST([LIB])

cd $EPLF_PATH
echo "export EPLF_PATH=$EPLF_PATH" > $HOME/.eplfrc
echo "export LD_LIBRARY_PATH=\$EPLF_PATH/EZFIO/lib/:\$LD_LIBRARY_PATH" >> $HOME/.eplfrc
echo "export PATH=\$EPLF_PATH/bin/":\$PATH >> $HOME/.eplfrc
echo "export PATH=\$EPLF_PATH/scripts/:\$PATH" >> $HOME/.eplfrc
echo "export EPLF_HAS_MPI=$EPLF_HAS_MPI" >> $HOME/.eplfrc
echo "export EPLF_MPIRUN=$MPIRUN" >> $HOME/.eplfrc
echo "************************************"
echo "To finish the installation:"
echo "1) Add the following line to your $HOME/.bashrc file:"
echo ". $HOME/.eplfrc"
echo "2) Execute"
echo ". $HOME/.eplfrc"
echo "make"
echo "************************************"

AC_OUTPUT