#!/usr/bin/env bash

directory=G4beamline-2.12-source 
filename=${directory}.tgz
url=http://www.muonsinternal.com/muons3/g4beamline/${filename}

while [[ $# > 1 ]]
do
key="$1"
case $key in
    -j|--num-threads)
    if expr "$2" : '-\?[0-9]\+$' >/dev/null
    then
        MAUS_NUM_THREADS="$2"
    fi
    shift
    ;;
    -t|--third-party-dir)
    MAUS_THIRD_PARTY="$2"
    shift
    ;;
esac
shift
done
if [ -z "$MAUS_NUM_THREADS" ]; then
  MAUS_NUM_THREADS=1
fi

if [ -n "${MAUS_ROOT_DIR+x}" ]; then

    if [ -e "${MAUS_ROOT_DIR}/third_party/source/${filename}" ]
    then
	echo "INFO: Found source archive in 'source' directory"
    else  
	echo "INFO: Source archive doesn't exist.  Downloading..."

	wget --directory-prefix=${MAUS_ROOT_DIR}/third_party/source ${url}

    fi
   
    if [ -e "${MAUS_ROOT_DIR}/third_party/source/${filename}" ]
    then
	echo "INFO: Source archive exists."
	echo
        echo "INFO: Checking MD5 checksum (otherwise the file didn't"
	echo "INFO: download properly):"
	echo
        cd ${MAUS_ROOT_DIR}/third_party/source
	ls ${filename}.md5

	md5sum -c ${filename}.md5 || { echo "FATAL: Failed to download:" >&2; echo "FATAL: ${filename}." >&2; echo "FATAL: MD5 checksum failed.">&2; echo "FATAL: Try rerunning this command to redownload, or check" >&2; echo "FATAL: internet connection"  >&2; rm -f ${filename}; exit 1; }
	sleep 1
	echo
	echo "INFO: Unpacking:"
	echo
        rm -Rf ${MAUS_ROOT_DIR}/third_party/build/${directory}
        sleep 1
        tar xvfz ${MAUS_ROOT_DIR}/third_party/source/${filename} -C ${MAUS_ROOT_DIR}/third_party/build > /dev/null
	ls ${MAUS_ROOT_DIR}/third_party/build/${directory}/source
        cd ${MAUS_ROOT_DIR}/third_party/build/${directory}/source/bin

	var1="LIBS=\"\$LIBS -lSoXt -lCoin -L/usr/lib -L/usr/X11R6/lib -lGLU -lGL -lXm -lXpm -lXmu -lXt -lXext -lX11 -lXi -lSM -lICE\""
	var2="LIBS=\"\$LIBS -L/usr/include/root/ -lSoXt -lCoin -L/usr/lib -L/usr/X11R6/lib -lGLU -lGL -lXm -lXpm -lXmu -lXt -lXext -lX11 -lXi -lSM -lICE\""
	var3="LIBS=\"\$LIBS -lexpat -ldl\""
	var4="LIBS=\"\$LIBS -L/\$G4BL_DIR/../../install/lib -lexpat -ldl\""
	var5='cd \.\./\.\.; rm -f lib/libCLHEP-\[A-Z]\*\.a bin/\[A-Z]\*-config; \\'
        var6='cd \.\./\.\.; rm -f lib/libCLHEP-\[A-Z]\*\.a; \\' 
	
	sed -e "s@$var1@$var2@g" g4bl-config >& g4bl-config2
	sed -e "s@$var3@$var4@g" g4bl-config2 >& g4bl-config3
	mv g4bl-config3 g4bl-config
	chmod a+x g4bl-config

	cd ${MAUS_ROOT_DIR}/third_party/build/${directory}
        sed -e "s@$var5@$var6@g" configure >& configure2
	mv configure2 configure
	chmod a+x configure
        	
	echo
        echo "INFO: Building:"
	echo
        sleep 1

	echo $LD_LIBRARY_PATH

	./configure --disable-visual

	cd ${MAUS_ROOT_DIR}/third_party/build/${directory}/source/bin
	mv g4bl-config ${MAUS_ROOT_DIR}/third_party/build/${directory}/bin/g4bl-config
	cd ${MAUS_ROOT_DIR}/third_party/build/${directory}

	echo
        echo "INFO: Make:"
	echo
        sleep 1
	make -j$MAUS_NUM_THREADS

        cat ${MAUS_ROOT_DIR}/src//map/MapPyBeamlineSimulation/G4bl/maps/x* > ${MAUS_ROOT_DIR}/src//map/MapPyBeamlineSimulation/G4bl/maps/TypeIBend_6InchGap_tapered.map
	            ################################################## 
	echo
        echo "INFO: The package should be locally build now in your"
	echo "INFO: third_party directory, which the rest of MAUS will"
	echo "INFO: find."
#         ./bin/g4bldata --install

    else
	echo "FATAL: Source archive still doesn't exist.  Please file a bug report with your operating system,">&2
	echo "FATAL: distribution, and any other useful information at:" >&2
	echo "FATAL: " >&2
	echo "FATAL: http://micewww.pp.rl.ac.uk:8080/projects/maus/issues/" >&2
	echo "FATAL:" >&2
	echo "FATAL: Giving up, sorry..." >&2
	exit 1
    fi
  
else         ################################################## 
echo
echo "FATAL: MAUS_ROOT_DIR is not set, which is required to" >&2  
echo "FATAL: know where to install this package.  You have two" >&2 
echo "FATAL: options:" >&2
echo "FATAL:" >&2
echo "FATAL: 1. Set the MAUS_ROOT_DIR from the command line by" >&2 
echo "FATAL: (if XXX is the directory where MAUS is installed):" >&2
echo "FATAL:" >&2 
echo "FATAL:        MAUS_ROOT_DIR=XXX ${0}" >&2
echo "FATAL:" >&2
echo "FATAL: 2. Run the './configure' script in the MAUS ROOT" >&2 
echo "FATAL: directory, run 'source env.sh' then rerun this" >&2  
echo "FATAL: command ">&2
exit 1
fi

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