#!/bin/sh

hour=$(date +"%-H")

morning=6
afternoon=12
night=19
cached=$(cat /tmp/day_cache)

if [ $hour -le $morning ]; then
  if [ ! "$cached" = "night"  ]; then
    feh --no-fehbg --bg-fill ~/.local/backgrounds/evening/$(ls ~/.local/backgrounds/evening | sort -R | tail -1 )
    echo "night" > /tmp/day_cache
  fi
elif [ $night -le $hour ]; then
  if [ ! "$cached" = "night"  ]; then

    feh --no-fehbg --bg-fill ~/.local/backgrounds/evening/$(ls ~/.local/backgrounds/evening | sort -R | tail -1 )
    echo "night" > /tmp/day_cache
  fi
elif [ $afternoon -le $hour ]; then
  if [ ! "$cached" = "afternoon"  ]; then
    feh --no-fehbg --bg-fill ~/.local/backgrounds/afternoon/$(ls ~/.local/backgrounds/afternoon| sort -R | tail -1 )
    echo "afternoon" > /tmp/day_cache
  fi
else
  if [ ! "$cached" = "morning"  ]; then
    feh --no-fehbg --bg-fill ~/.local/backgrounds/morning/$(ls ~/.local/backgrounds/morning | sort -R | tail -1 )
    echo "morning" > /tmp/day_cache
  fi
fi