#!/usr/bin/perl -w
# $Id:$
use strict;
use warnings;
use Cwd qw(abs_path);
use Getopt::Long;


my @user = $ENV{'USER'};
my @hostName = $ENV{'HOST'};
my @fc = $ENV{'FC'};
my @outfile = abs_path"build/Makefile.".$ENV{'HOST'};

if (defined $ENV{'HOSTNAME'}){

print "hostname is global\n";
print $ENV{'HOSTNAME'};
@outfile = abs_path"build/Makefile.".$ENV{'HOSTNAME'};

@hostName = $ENV{'HOSTNAME'};
}

print "Make include file is @outfile\n";
unlink @outfile;

if (defined $ENV{'FC'}){

print "Fortran compiler (FC) is set to @fc\n";
 
} else {
print "No Environmental Variable FC is set. Configuration for DCOMP is for ifort only\n";
}
#print cwd"build/Makefile.@hostName\n";
#if ( -e cwd"build/Makefile.".@hostName ) { 
#print "File for this machine is already there. Do you really want to re-config (n/y):\n";
#my $input = <STDIN>;
#chomp $input;

#if ( $input eq "n" ) {
#die "Stop configuration \n"
#}
#}

print "Hostname is @hostName\n";



my @rttov_path_default='/apollo/cloud/Ancil_Data//SOFTWARE/RTM/RTTOV123/';
@rttov_path_default='/Users/awalther/SOFTWARE/RTM/RTTOV123/' if ("@hostName" eq "losna");



if (-d "@rttov_path_default") {
print "RTTOV Path exists: ";
print  "@rttov_path_default\n\n";

}
else {

@rttov_path_default=' ';
print "not exist\n";
print  "@rttov_path_default\n\n";
}





# Default values for command-line options.
my %opt = (
            hdf4_ifort => '${SSEC_HDF4_LIB}/../',
            hdf5_ifort => '${SSEC_HDF5_LIB}/../',
            netcdf_ifort => '${SSEC_NETCDF4_LIB}/../',
            dncomp_ifort => '../cx_dncomp/Release_ifort/',
            muri_ifort => '../muri/Release_ifort/',
            cx_sds_io_ifort => '../cx_sds_io/Release_ifort/',
            hdf4_gcc => '${SSEC_HDF4_LIB}/../',
            hdf5_gcc => '${SSEC_HDF5_LIB}/../',
            rttov_path => @rttov_path_default,
            netcdf_gcc => '${SSEC_NETCDF4_LIB}/../',
            dncomp_gcc => '../cx_dncomp/Release_gfortran/',
            muri_gcc => '../muri/Release_gfortran/',
            cx_sds_io_gcc => '../cx_sds_io/Release_gfortran/',
            rttov => '../rttov/',
           
          );

my @sargv = @ARGV;
GetOptions(
   \%opt,
   'hdf4_ifort=s',
   'hdf5_ifort=s',
   'netcdf_ifort=s',
   'dncomp_ifort=s',
   'cx_sds_io_ifort=s',
   'libhim_ifort=s',
   'hdf4_gcc=s',
   'hdf5_gcc=s',
   'rttov_path=s',
   'netcdf_gcc=s',
   'dncomp_gcc=s',
   'cx_sds_io_gcc=s',
   'libhim_gcc=s',
   'help'
) or die "Error parsing command-line options!\n";


#-d $opt{hdf4_ifort} or print "WARNING: Doesn't exist or not a directory for HDF4_ifort: $opt{hdf4_ifort}\n";
#-d $opt{hdf5_ifort} or print "WARNING: Doesn't exist or not a directory for HDF5_ifort: $opt{hdf5_ifort}\n";
#-d $opt{netcdf_ifort} or print "WARNING: Doesn't exist or not a directory for NETCDF_ifort: $opt{netcdf_ifort}\n";
#-d $opt{dncomp_ifort} or print "WARNING  FOR IFORT USAGE: Doesn't exist or not a directory for DNCOMP_ifort: $opt{dncomp_ifort}\n";
#-d $opt{cx_sds_io_ifort} or print "WARNING  FOR IFORT USAGE: Doesn't exist or not a directory for CX_SDS_IO_ifort: $opt{cx_sds_io_ifort}\n\n";

#-d $opt{hdf4_gcc} or print "WARNING: Doesn't exist or not a directory for HDF4_gcc: $opt{hdf4_gcc}\n";
#-d $opt{hdf5_gcc} or print "WARNING: Doesn't exist or not a directory for HDF5_gcc: $opt{hdf5_gcc}\n";
#-d $opt{netcdf_gcc} or print "WARNING: Doesn't exist or not a directory for NETCDF_gcc: $opt{netcdf_gcc}\n";
#-d $opt{dncomp_gcc} or print "WARNING FOR GCC USAGE: Is not a directory for DNCOMP_gcc: $opt{dncomp_gcc}\n";
#-d $opt{cx_sds_io_gcc} or print "WARNING  FOR GCC USAGE: Is not a directory for CX_SDS_IO_gcc: $opt{cx_sds_io_gcc}\n\n";

-d $opt{rttov_path} or print "WARNING  FOR RTTOV USAGE: Is not a directory for RTTOV: $opt{rttov_path}\n\n";
-d $opt{rttov_path} or print "ADD --rttov_path='<rttov_path>'\n\n";



#if (@fc eq 'gfortran'){ 
chdir ('cx_sds_io/Release_gfortran');
system "./configure --HDF4_PATH=$opt{hdf4_gcc} --HDF5_PATH=$opt{hdf5_gcc} --NETCDF_PATH=$opt{netcdf_gcc}";
chdir ('../../cx_dncomp/Release_gfortran');

system "./configure --HDF4_PATH=$opt{hdf4_gcc} --HDF5_PATH=$opt{hdf5_gcc} --NETCDF_PATH=$opt{netcdf_gcc}";
chdir ('../../muri/Release_gfortran');
system "./configure --HDF4_PATH=$opt{hdf4_gcc} --HDF5_PATH=$opt{hdf5_gcc} --NETCDF_PATH=$opt{netcdf_gcc}";
chdir ('../../');

#} else {
chdir ('cx_sds_io/Release_ifort');
system "./configure --HDF4_PATH=$opt{hdf4_ifort} --HDF5_PATH=$opt{hdf5_ifort} --NETCDF_PATH=$opt{netcdf_ifort}";
chdir ('../../cx_dncomp/Release_ifort');
system "./configure --HDF4_PATH=$opt{hdf4_ifort} --HDF5_PATH=$opt{hdf5_ifort} --NETCDF_PATH=$opt{netcdf_ifort}";
chdir ('../../muri/Release_ifort');
system "./configure --HDF4_PATH=$opt{hdf4_ifort} --HDF5_PATH=$opt{hdf5_ifort} --NETCDF_PATH=$opt{netcdf_ifort}";
#}
chdir (' ../../');

# Help.
usage() if $opt{help};



open (CONFIG, '>> ',@outfile) or die "Could not open file '@outfile' $!)\n";
   print CONFIG '# This file was generated on ' . localtime() . " by $ENV{USER}",
   " with the following command-line arguments: @sargv.\n# System info: ",
   `uname -a`;
   print CONFIG "# Include all required macros on the following lines:\n\n";
   
   print CONFIG "ifeq (\$(ARCH),\$(filter \$(ARCH), gfortran gfortran-profile gfortran-strict gfortran-debug))\n";
   print CONFIG "export CX_DATA_IO=$opt{cx_sds_io_gcc}\n";
   print CONFIG "export DNCOMP=$opt{dncomp_gcc}\n";
   print CONFIG "export MURI=$opt{muri_gcc}\n";
   print CONFIG "export HDF4_PATH =$opt{hdf4_gcc}\n";
   print CONFIG "export HDF5_PATH =$opt{hdf5_gcc}\n";
   print CONFIG "export NETCDF_PATH = $opt{netcdf_gcc}\n";
   print CONFIG "export LIBHIM_PATH = $opt{libhim_gcc}\n";
   print CONFIG "export RTTOV_DIR = ../rttov/\n";
   print CONFIG "export RTTOV_PATH = $opt{rttov_path}\n";
   print CONFIG "else\n";
   print CONFIG "export CX_DATA_IO=$opt{cx_sds_io_ifort}\n";
   print CONFIG "export DNCOMP=$opt{dncomp_ifort}\n";
   print CONFIG "export MURI=$opt{muri_ifort}\n";
   print CONFIG "export HDF4_PATH =$opt{hdf4_ifort}\n";
   print CONFIG "export HDF5_PATH =$opt{hdf5_ifort}\n";
   print CONFIG "export NETCDF_PATH = $opt{netcdf_ifort}\n";
   print CONFIG "export LIBHIM_PATH = $opt{libhim_ifort}\n";
   print CONFIG "export RTTOV_DIR = ../rttov/\n";
   print CONFIG "export RTTOV_PATH = $opt{rttov_path}\n";
   print CONFIG "endif\n";
   
   
#   print CONFIG "hdf5libs = -I$opt{hdf5_ifort}include/ -L$opt{hdf5_ifort}lib/\n";
close CONFIG;
print "The CLAVR-x source code is configured for build on this system.\n";

exit;

sub usage
{
   print <<HELP;
CLAVR-x configure script. Run it in order to configure CLAVR-x build process.
It should be executed in the CLAVR-x main directory.

#HIMAWARI_UTILS_LIBS = -lc++ $(HIMAWARI_UTILS)/src/libHimawari.a
Usage: configure [command line options...]

Command line options:

--hdf4_ifort=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.
         
--hdf5_ifort=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.

--netcdf_ifort=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.

--dncomp_ifort=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.


--cx_sds_io_ifort=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.

--hdf4_gcc=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.

--hdf5_gcc=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.


--netcdf_gcc=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.
         
--dncomp_gcc=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.     
         
--cx_sds_io_gcc=<directory>
         Path to the directory where HDF library and include files are stored.
         Default is the root path SSEC global variable of hdf4 library SSEC_HDF4_LIB / ../.  

--rttov_path=<directory>
         Path to the directory where RTTOV library and include files are stored.
         
--libhim_ifort=<directory>
         Path to the directory where Libhimawari library is located for ifort compiles
--libhim_gcc=<directory>
         Path to the directory where Libhimawari library is located for gcc compiles
                    
HELP
   exit;
}