# description: makes ARC Candypond client availble on the Worker Nodes and ready to be used
# param:CANDYPOND_URL:string:auto:Manually redefine Candypond URL

CANDYPOND_URL=${CANDYPOND_URL:-"auto"}

ARC_LIBEXEC_DIR="${ARC_LOCATION:-/cvmfs/dirac.egi.eu/dirac/v8.0.27/Linux-x86_64}/libexec/arc"
ARC_CONFIG_PARSER="$ARC_LIBEXEC_DIR/arcconfig-parser --load -r $ARC_CONFIG"

if [ "x$1" = "x0" ]; then
    # determine Candypond URL
    if [ "x$CANDYPOND_URL" = "xauto" ]; then
        if [ ! -r "$ARC_CONFIG" ]; then 
            echo "WARNING: arc.conf is not readable, assumming Candypond is enabled and default URL is used." >&2
            CANDYPOND_URL="https://$(hostname -f):443/arex/candypond"
        else
            # check Candypond is enabled
            $ARC_CONFIG_PARSER -b arex/ws/candypond
            if [ $? -ne 0 ]; then
                echo "FATAL: Candypond is not enabled. Add [arex/ws/candypond] to the arc.conf." >&2
                exit 1
            fi
            # get URL
            CANDYPOND_URL="$( $ARC_CONFIG_PARSER -b arex/ws -o wsurl )/candypond"
        fi
    fi

    # copy 'arccandypond' tool to sessiondir
    mkdir -p ${joboption_directory}/arc/bin/
    cp $ARC_LIBEXEC_DIR/arccandypond ${joboption_directory}/arc/bin/

    # add URL to job environment (find the last and add to bottom)
    arc_env_idx=0
    arc_env_var="joboption_env_${arc_env_idx}"
    while eval "test -n \"\$$arc_env_var\""; do 
        arc_env_idx=$(( arc_env_idx + 1 ))
        arc_env_var="joboption_env_${arc_env_idx}"
    done
    eval "export ${arc_env_var}=ARC_CANDYPOND_URL='$CANDYPOND_URL'"

elif [ "x$1" = "x1" ]; then
    # add to PATH
    export PATH="${RUNTIME_JOB_DIR}/arc/bin:$PATH"
fi