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#!/bin/sh
killall swaybg
PIDFILE="/tmp/randombg.pid"
# Check if the PID file exists and if the process is running
if [ -e "$PIDFILE" ] && kill -0 "$(bat "$PIDFILE")"; then
  echo "Another instance of the script is already running."
  kill -9 "$(bat $PIDFILE)" # Forcefully kill the old process
fi
echo $$ >"$PIDFILE"

cleanup() {
  [ -n "$OLD_PID" ] && kill "$OLD_PID" 2>/dev/null
  rm -f "$PIDFILE"
  exit 0
}
trap cleanup INT TERM EXIT

sleep_interruptible() {
  t=$1
  while [ "$t" -gt 0 ]; do
    sleep 1 || return
    t=$((t - 1))
  done
}

swaybg -i "$(fd . /mnt/ssd/papes -t f | shuf -n1)" -m fill &
OLD_PID=$!
while true; do
  sleep_interruptible 300
  swaybg -i "$(fd . /mnt/ssd/papes -t f | shuf -n1)" -m fill &
  NEXT_PID=$!
  sleep_interruptible 5
  kill $OLD_PID
  OLD_PID=$NEXT_PID
done