{ self, ... }: {


    perSystem = { self', pkgs, system, ... }: {
        packages = {

            aurora-greeter = pkgs.writeShellScriptBin "aurora-greeter" ''
                ${pkgs.quickshell}/bin/quickshell -p ${self'.packages.aurora-greeter-dots}/share/shell.qml
            '';

            aurora-greeter-dots = pkgs.stdenv.mkDerivation {

                name = "aurora-greeter-dots";

                src = ./.;

                buildInputs = [];

                buildPhase = ''
                '';

                installPhase = ''
                    mkdir -p $out/share
                    cp -r $src/* $out/share
                '';
            };

            aurora-greeter-hypr-conf = pkgs.writeText "greeter-conf" ''
                exec-once=${self'.packages.aurora-set-wallpaper}/bin/aurora-set-wallpaper
                exec-once=${self'.packages.aurora-greeter}/bin/aurora-greeter; hyprctl dispatch exit
            '';

            
            aurora-change-colors = (pkgs.writeShellScriptBin "aurora-change-colors" ''

                img=''$(realpath "''$1")
                alpha=''${2:-80}

                if [[ ''$alpha -lt 0 ]]; then
                   alpha=0
                elif [[ ''$alpha -gt 100 ]]; then
                   alpha=100
                fi

                if [[ -f ~/.config/wal/colorschemes/dark/''$(basename "''$img")-''$alpha.json ]]; then
                   ${pkgs.pywal16}/bin/wal -n -f "''$(basename "''$img")-''$alpha"
                else
                   ${pkgs.pywal16}/bin/wal -n -i "''$img" -a "''$alpha" --cols16 -p "''$(basename "''$img")-''$alpha"
                fi
            '');

            aurora-set-wallpaper = (pkgs.writeShellScriptBin "aurora-set-wallpaper" ''

                if [[ ! -d /tmp/aurora/wallpaper ]]; then
                    mkdir -p /tmp/aurora/wallpaper
                fi

                src=''$(realpath "''${1:-$(find /tmp/aurora/wallpaper/*)}")
                n=''$(basename "''$src")
                ext="''${n''\#''\#*.}"
                out=''${3:-/dev/null}

                if [[ ! -z $1 ]]; then
                    rm -rf /tmp/aurora/wallpaper/*
                    cp ''$src /tmp/aurora/wallpaper/wallpaper.$ext
                    chmod 666 /tmp/aurora/wallpaper/wallpaper.$ext
                fi

                img="/tmp/aurora/wallpaper/wallpaper.$ext"

                if [[ ''$ext == "gif" || ''$ext == "mp4" ]]; then
                    yes | ${pkgs.ffmpeg}/bin/ffmpeg -i "''$img" -vframes 1 /tmp/aurora/tmp.jpg >> ''$out
                    pidof mpvpaper >> $out && pkill mpvpaper
                    ${pkgs.swww}/bin/swww img /tmp/aurora/tmp.jpg -t wipe >> ''$out
                    sleep 0.6
                    hyprctl dispatch exec "${pkgs.mpvpaper}/bin/mpvpaper ALL ''$img -o loop" >> ''$out
                else
                    yes | ${pkgs.ffmpeg}/bin/ffmpeg -i "''$img" /tmp/aurora/tmp.jpg >> ''$out
                    pidof mpvpaper >> $out && pkill mpvpaper
                    hyprctl dispatch exec "${pkgs.swww}/bin/swww img ''$img -t wipe" >> ''$out
                fi

                ${self'.packages.aurora-change-colors}/bin/aurora-change-colors "''$src" "''$2" >> ''$out
            '');
            

        };
    };

    flake.nixosModules.default = { config, lib, pkgs, ... }: {

        options.services.aurora-greeter = with lib; {
            enable = mkEnableOption "aurora-greeter";
        };

        config = let
            cfg = config.services.aurora-greeter;

            system = pkgs.stdenv.hostPlatform.system;
        in {

            users.users.aurora = {

                createHome = true;

                home = "/tmp/aurora/home";

                packages = with pkgs; [
                    self.packages.${system}.aurora-greeter
                    self.packages.${system}.aurora-set-wallpaper

                    swww
                    mpvpaper
                    ffmpeg
                ];

                isNormalUser = true;

                group = "aurora";
            };

            users.groups.aurora = {};

            services.greetd = {
                enable = cfg.enable;

                settings = {

                    default_session = {
                        command = "start-hyprland -- -c ${self.packages.${system}.aurora-greeter-hypr-conf}";
                        user = "aurora";
                    };
                };
            };
        };
    };
}