#!/bin/bash
function usage() {
    echo "Usage: ./kstudygen.bash [-o <offset>] <process>"
    echo "    where <process> is the index of the subset"
    echo "    of events to genulate in this job. The output"
    echo "    is written to kstudygen_<process>.hddm where"
    echo "    <offset> is added to <process> if it is given."
    exit 1
}

runno=71500
nevents=1000000
source setup.sh

offset=0
process=none
while [ $# -gt 0 ]; do
    if echo $1 | grep -q -- '-'; then
        if [ "$1" = "-o" ]; then
            offset=$2
            shift; shift
        else
            usage
        fi
    else
        process=$1
        break
    fi
done
if [ "$process" = "none" ]; then
    usage
else
    process=`expr $process + $offset`
fi
random_sequence=`expr $process + 1`
random_number=`awk '{if(NR=='$random_sequence'){print $1}}' randoms`

function exit_with_error() {
    echo "Quitting after error, code=$1"
	exit $1
}

echo Running process $process on `hostname -s`
genr8 -s$random_number -r$runno -M$nevents -Akstudygen.ascii < genr8.in || exit_with_error $?
genr8_2_hddm kstudygen.ascii || exit_with_error $?

rm kstudygen.ascii
mv kstudygen.hddm kstudygen_$process.hddm