#!/usr/bin/env bash

# This script allows toggling the active screen_shader used in hyprland. 
# It automatically discovers shader files in the $SHADERDIR folder.
# And uses rofi for a graphical gui-- this uses the shaders.rasi configuration file.
# (Also dunst for notifications.)

SHADERDIR="$HOME/.config/hypr/windowShaders/"


function dunst() {
  dunstify \
  -r 2137 \
  -t 2000 \
  -u low \
  -i ~/.icons/candy-icons/apps/scalable/applets-screenshooter.svg \
  "${1/.*/}"
}


shaders="reset,
$(find "$SHADERDIR" -type f,l -regextype posix-extended -iregex '.*(frag|vert|glsl)$' | awk -F'[./]' '{printf "%s,%s.%s\n", $(NF-1), $(NF-1), $NF}')"

idx=$(printf "%s" "$shaders" | awk -F',' '{print $1}' | rofi -i -dmenu -P Shaders -config ~/.config/rofi/shaders.rasi -format d)


# apply selected shader (if any)
if [[  $idx -eq 0 ]]; then
  printf "No shader selected.\nExiting..\n"
  exit
fi

if [[ $idx -eq 1 ]]; then
  # selected reset, which is a special case
  hyprctl dispatch 'hl.dsp.window.clear_tags()'
  hyprctl reload
  dunst "Reset shader"
  exit
fi

name=$(printf "%s" "$shaders" | awk -F',' "NR == $idx {printf \"%s\n\", \$1}")
hyprctl dispatch "hl.dsp.window.tag({ tag = 'shader/$name'})"
dunst "Applied shader $file"