#! /bin/sh
set -euf

max=100
step=10
min=0

announce() {
  # fade-out streams
  for i in `seq $max -$step $min`; do
    amixer -q -c 0 -D hw:0 sset Front $i%
    sleep 0.1
  done
  /krebs/streams/streams stop

  amixer -q -c 0 -D hw:0 sset Front $max%
  mplayer /krebs/god/overlord/announce.mp3 >/dev/null
  espeak -v de -s 120 -a 900 "$*"

  # fade-in streams
  /krebs/streams/streams start
  for i in `seq $min $step $max`; do
    sleep 0.1
    amixer -q -c 0 -D hw:0 sset Front $i%
  done
}

case "${1---help}" in
   --help) echo "Make an announcement! Usage: /overlord <text>";;
   *) announce "$@";;
esac