{ inputs
, lib
, config
, pkgs
, ...
}:

{
  options =
    let
      inherit (lib) mkOption types;
    in
    {
      hyprpaper = {
        wallpaperFolder = mkOption {
          type = types.str;
        };
      };
    };

  config =
    let
      cfg = config.hyprpaper;
      hyprlandCfg = config.hyprland;

      changeWallpaperScript =
        pkgs.writeShellScriptBin
          "change-wallpaper"
          (lib.concatStringsSep
            "\n"
            (lib.flatten
              (map
                (m:
                  let
                    output = m.name;
                    wallpaper = "\"$(${pkgs.findutils}/bin/find -L \"${cfg.wallpaperFolder}\" -type f | ${pkgs.coreutils}/bin/shuf -n 1)\"";
                  in
                  [
                    "wallpaper=${wallpaper}"
                    "${pkgs.hyprland}/bin/hyprctl hyprpaper preload $wallpaper"
                    "${pkgs.hyprland}/bin/hyprctl hyprpaper wallpaper ${output},$wallpaper"
                  ]
                )
                hyprlandCfg.monitors)
            ++ [ "${pkgs.hyprland}/bin/hyprctl hyprpaper unload all" ])
          );
    in
    {
      hyprland.autoStart = [
        "${pkgs.hyprpaper}/bin/hyprpaper"
        "sleep 2; ${changeWallpaperScript}/bin/change-wallpaper"
      ];

      home.packages = with pkgs; [
        hyprpaper
        changeWallpaperScript
      ];
    };
}