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#!/bin/sh

# This script does the following:
#	Run by itself, set the wallpaper (at X start).
#	If given a file, set that as the new wallpaper.
#	If given a directory, choose random file in it.
#	If wal is installed, also generates a colorscheme.

# Location of link to wallpaper link.
bgloc="${XDG_DATA_HOME:-$HOME/.local/share}/bg"

# Configuration files of applications that have their themes changed by pywal.
dunstconf="${XDG_CONFIG_HOME:-$HOME/.config}/dunst/dunstrc"
zathuraconf="${XDG_CONFIG_HOME:-$HOME/.config}/zathura/zathurarc"

# Give -s as parameter to make notifications silent.
while getopts "s" o; do case "${o}" in
  s) silent='1' ;;
  esac done

shift $((OPTIND - 1))

trueloc="$(readlink -f "$1")" &&
  case "$(file --mime-type -b "$trueloc")" in
  image/*) ln -sf "$trueloc" "$bgloc" && [ -z "$silent" ] && notify-send -i "$bgloc" "Changing wallpaper..." ;;
  inode/directory) ln -sf "$(find "$trueloc" -iregex '.*.\(jpg\|jpeg\|png\|gif\)' -type f | shuf -n 1)" "$bgloc" && [ -z "$silent" ] && notify-send -i "$bgloc" "Random Wallpaper chosen." ;;
  *)
    [ -z "$silent" ] && notify-send "🖼️ Error" "Not a valid image or directory."
    exit 1
    ;;
  esac

# If pywal is installed, use it.
if command -v wal >/dev/null 2>&1; then
  wal -n -i "$(readlink -f $bgloc)" -o "${XDG_CONFIG_HOME:-$HOME/.config}/wal/postrun" >/dev/null 2>&1
# If pywal is removed, return config files to normal.
else
  [ -f "$dunstconf.bak" ] && unlink "$dunstconf" && mv "$dunstconf.bak" "$dunstconf"
  [ -f "$zathuraconf.bak" ] && unlink "$zathuraconf" && mv "$zathuraconf.bak" "$zathuraconf"
fi

killall swaybg
swaybg -i "$bgloc" -m fill &
# If running, dwm hit the key to refresh the color scheme.
# pidof dwm >/dev/null && xdotool key super+F5