#!/bin/sh

WALLDIR="${HOME}/.share/wallpapers"
BASECMD="feh --bg-fill"

generate_wall () {
  GENWALL=$( \
    ls $WALLDIR | \
    shuf -n 1
  )
  GENWALL="${WALLDIR}/${GENWALL}"
}
wall () {
  generate_wall
  while [ "${GENWALL}" = "${1}" ]; do
    generate_wall
  done
}
displays () {
  displays=$(xrandr | grep ' connected' | wc -l)
}
check () {
  which $1 &>/dev/null
}

cmd=""
check "feh" || exit 1
if check "xrandr"; then
  displays
  for i in $(seq 1 $displays); do
    wall ${tmp}
    tmp=${GENWALL}
    echo ${GENWALL} ${i}
    cmd="${cmd} ${GENWALL}"
  done
  eval ${BASECMD} ${cmd}
else
  generate_wall
  eval ${BASECMD} ${GENWALL}
fi
unset GENWALL BASECMD tmp cmd displays i
exit 0