#! /bin/bash

mayhem_party_rotate() {
   local currently=$(realpath live.yaml | grep -o '[0-9].yaml$' | grep -o '^[0-9]')
   local next=${NEXT:-$((RANDOM%5))}
   while [ -z "$NEXT" ] && [ "$next" == "$currently" ]; do
      next=$((RANDOM%5))
   done
   rm live.yaml
   ln -s players_offset_$next.yaml live.yaml
   pkill -SIGUSR1 -f mayhem-party
}

trap mayhem_party_rotate SIGUSR1

if [ "$0" == "$BASH_SOURCE" ]; then
   NEXT=0 mayhem_party_rotate
   while read -p "$(date) > [press enter to rotate]"; do
      mayhem_party_rotate
   done
fi