#!/bin/sh

#
# Name of this script
SCRIPT=configure

arg1=$1


#
# Process any command line arguments
args=`getopt :d $*`
if [ $? != 0 ] ; then
    echo 'Usage: $0 [-d]'
    exit 64 # EX_USAGE
fi
set -- $args
for arg ; do
    case "$arg" in
        -d) DEBUG=1; echo 'Compiling with DEBUG option'; shift;;
    esac
done

# =============================================================================
# Looking for NETCDF libraries / includes:
# 3 ways to get this
#   1> set environment variable NETCDF
#   2> default system installed location
#   3> ./netcdf_links with include and lib directories or links
#   4> EXIT 
# =============================================================================
if [ -z "$NETCDF" ] ; then     # Enviroment var not set
  echo ' '
  echo '================================================================= '
  echo 'NETCDF environment variable not set :: '
  echo '  these libraries and include files are required.'
  echo '=================================================================='
  echo 'Select an option to set NETCDF to continue ' $SCRIPT
  echo ' 1) Use System default'
  echo ' 2) Use ./netcdf_links <user supplied>'
  echo ' 3) Manually enter these pathes now'
  echo ' 4) <default> exit this configure script'
  echo ' '
  echo -n 'Select => '

  read REPLY
  case $REPLY in
     #
     # System default
    "1" )
        if [ -d /usr/local/netcdf ] ; then
          NETCDF=/usr/local/netcdf
        else
          echo $SCRIPT ': /usr/local/netcdf not found'
          exit 2   #ERROR
        fi ;;
    #
    # User supplied
    "2" )
        if [ -d ./netcdf_links ] ; then
          NETCDF=`pwd`/netcdf_links
        else
          echo $SCRIPT ': ./netcdf_links not found'
          exit 2   #ERROR
        fi ;;
    #
    # Manually enter
    "3" )
        netcdfipath=""
        netcdflpath=""
        echo 'Enter full path to NetCDF include directory on your system'
        read REPLY
        if [ ! -d "$REPLY" ] ; then
          echo $SCRIPT ': ' $REPLY ' not found'
          exit 2    #ERROR
        else
          netcdfipath=$REPLY
        fi
        echo 'Enter full path to NetCDF library directory on your system'
        read REPLY
        if [ ! -d "$REPLY" ] ; then
          echo $SCRIPT ' : ' $REPLY ' not found'
          exit 2    #ERROR
        else
          netcdflpath=$REPLY
        fi

        /bin/rm -fr ./netcdf_links
        mkdir ./netcdf_links
        cd ./netcdf_links 
        ln -s "$netcdfipath" include
        ln -s "$netcdflpath" lib
        cd ..

        echo created new ./netcdf_links directory
        NETCDF=`pwd`/netcdf_links ;;

    #
    # Get me out of here - NOW
    "4" ) echo $SCRIPT ' : User terminated' ; exit 1  ;;
  esac 
fi

echo "Will use NETCDF in dir: " $NETCDF
#
# NETCDF 3.6.2 and greater there might be a second library, libnetcdff.a 
USENETCDFF=""  
if [ -f "$NETCDF/lib/libnetcdff.a" ] ; then
  USENETCDFF="-lnetcdff"
fi

# =============================================================================
# Look for WRF libs
# 
#   1> Environment variable
#   2> ./../WRFV3
#   3> Manually entered
# =============================================================================
if [ -z "$WRF_DIR" ] ; then       # 1> enviro var
  p=`pwd`/../WRFV3                # 2> ./../WRFV3
  if [ -d  $p ]; then
    WRF_DIR=$p

  else                            # 3> Manual
    wrfpath=""
    echo '** WARNING: WRF_DIR enviroment variable not set and WRFV3 not found'
    echo '**   at ./../WRFV3'
    echo ' '

    echo 'Do you wish to '
    echo '  1> Enter WRF path name manually'
    echo '  2> Exit'

    read REPLY
    if [ $REPLY = "1" ] ; then
      echo 'Enter full path to WRF install directory on your system (i.e. $HOME/WRFV3)'
      echo -n 'wrfpath = '

      read REPLY
      if [ -d "$REPLY" ] ; then
        WRF_DIR=$REPLY
      else
        echo $SCRIPT ' : ' $REPLY ' directory not found'
        exit 2
      fi

    else
      echo $SCRIPT ' : User terminated'
      exit 1 
    fi
  fi   # WRF found in directory tree 
fi   # Enviro not set

echo "Will use WRF in dir: $WRF_DIR"

#
# if the uname command exists, give it a shot and see if
# we can narrow the choices; otherwise, spam 'em
os="ARCH"
mach="ARCH"
type uname > /dev/null
if [ $? -eq 0 ] ; then
    os=`uname`
    if [ "$os" = "AIX" -o "$os" = "IRIX" -o "$os" = "IRIX64" -o "$os" = "SunOS" -o "$os" = "HP-UX"  -o "$os" = "Darwin" ] ; then
      mach="ARCH"
    else
      if [ "$os" = "OSF1" -o "$os" = "Linux" -o "$os" = "UNICOS/mp" -o "$os" = "UNIX_System_V" ] ; then
        mach=`uname -m`
      else
        os="ARCH"
        mach="ARCH"
      fi
    fi
fi

#
# Add directory support for build
pwd=`pwd`
if [ ! -e ./bin ] ; then
   echo "$SCRIPT: making ./bin"
   mkdir ./bin
fi
BINDIR=${pwd}/bin
echo "bindir " ${BINDIR}

if [ ! -e ./include ] ; then
   echo "$SCRIPT: making ./include"
   mkdir ./include
fi
INCMOD=${pwd}/include
echo "incmod " ${INCMOD}

if [ ! -e ./lib ] ; then
   echo "$SCRIPT: making ./lib"
   mkdir ./lib
fi
LIBDIR=${pwd}/lib
echo "libdir " ${LIBDIR}

#
# See if the env var DEBUG is set (overriding any arguments passed in)
if [ ! -z "$DEBUG" ] ; then
    DEBUG=1
fi

#
# so proceed with configuration 
perl arch/Config.pl  -wrfpath=$WRF_DIR                                \
                     -netcdf=$NETCDF -USENETCDFF=$USENETCDFF          \
                     -os=$os -mach=$mach                              \
                     -bindir=$BINDIR -incmod=$INCMOD -libdir=$LIBDIR  \
                     -debug=$DEBUG