{ pkgs, config, lib, ... }:
with lib;
let
  cfg = config.eboskma.wallpapers;

  i3SetWallpaper = pkgs.writeShellScript "i3-set-wallpaper" (if builtins.isPath cfg.images then
    ''${pkgs.nitrogen}/bin/nitrogen --set-color=${cfg.backgroundColor} --set-tiled ${cfg.images}''
  else
    builtins.concatStringsSep "\n" (map
      ({ fst, snd }:
        let
          image = fst;
          monitor = toString snd;
        in
        ''${pkgs.nitrogen}/bin/nitrogen --head=${monitor} --set-color=${cfg.backgroundColor} --set-tiled ${image}'')
      (zipLists cfg.images (builtins.genList (x: x) (builtins.length cfg.images)))));
in
{
  options.eboskma.wallpapers = {
    enable = mkEnableOption "wallpapers";
    backgroundColor = mkOption {
      description = "Hex value of the background color";
      type = types.strMatching "#[[:xdigit:]]{6}";
      default = "#000000";
      example = "#ff0000";
    };
    images = mkOption {
      description = "Image(s) to use as wallpapers. For multiple monitors, either set a single image to use on all monitors, or set a list with as many images as monitors you have";
      type = with types; oneOf [ path (nonEmptyListOf path) ];
    };
  };

  config = mkIf cfg.enable {
    home.packages = [ pkgs.nitrogen ];

    xsession.windowManager.i3.config.startup = [
      {
        command = toString i3SetWallpaper;
        notification = false;
      }
    ];


  };
}