#!/bin/bash
SHADER_DIR="$HOME/.config/hypr/shaders"

mapfile -t SHADERS < <(find "$SHADER_DIR" -name "*.glsl" | sort)

if [[ ${#SHADERS[@]} -eq 0 ]]; then
    exit 0
fi

CURRENT=$(hyprctl getoption decoration:screen_shader | grep "str:" | awk '{print $2}' | tr -d '"')

INDEX=-1
for i in "${!SHADERS[@]}"; do
    if [[ "${SHADERS[$i]}" == "$CURRENT" ]]; then
        INDEX=$i
        break
    fi
done

NEXT=$(( (INDEX + 1) % ${#SHADERS[@]} ))
hyprshade on "${SHADERS[$NEXT]}"