nixos-config/modules/programs/kanshi/default.nix

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

let
  kanshi = pkgs.kanshi;
  writeShellScript = pkgs.writeShellScript;
  wallpapersPath = "/home/${config.system.singleUser}/Data/Wallpaper";
  wallpapersHorizontal = "${wallpapersPath}/horizontal";
  wallpapersVertical = "${wallpapersPath}/vertical";
  wallpaperScript = writeShellScript "wallpaper.sh" ''
    set -x
    [[ $# -lt 1 ]] && echo "No profile specified" && exit 1

    random_file() {
      find "$1" -maxdepth 1 -type f | shuf -n 1
    }

    setbg() {
      # Sets the background of $1 to $2
      swaymsg "output \"$1\" background $2 fill"
    }

    case $1 in
      homeMultihead)
        horiz=$(random_file ${wallpapersHorizontal})
        vert=$(random_file ${wallpapersVertical})

        setbg "DP-2" $horiz
        setbg "HDMI-A-3" $vert
        ;;
      genericMultihead)
        horiz1=$(random_file ${wallpapersHorizontal})
        horiz2=$(random_file ${wallpapersHorizontal})

        setbg "eDP-1" $horiz1
        setbg "HDMI-A-1" $horiz2
        ;;
      laptop)
        horiz=$(random_file ${wallpapersHorizontal})

        setbg "eDP-1" $horiz
        ;;
    esac
  '';
  mkProfile = name: outputs: {
    outputs = outputs;

    exec = "${wallpaperScript} ${name}";
  };
in {
  environment.systemPackages = [ kanshi ];

  home-manager.users."${config.system.singleUser}".services.kanshi = {
      enable = true;
      profiles = let
        horizontal = "Samsung Electric Company C27F398 H4ZR101145";
        vertical = "Goldstar Company Ltd IPS235 305NDPHKN600";
      in {
        homeMultihead = mkProfile "homeMultihead" [
          {
            criteria = vertical;
            status = "enable";
            mode = "1920x1080";
            transform = "90";
            position = "-1080,0";
          }
          {
            criteria = horizontal;
            status = "enable";
            mode = "1920x1080";
            position = "0,0";
          }
         #{
         #  criteria = "eDP-1";
         #  status = "enable";
         #  mode = "1920x1080";
         #  position = "0,0";
         #}
        ];
       #genericMultihead = mkProfile "genericMultihead" [
       #  {
       #    criteria = "eDP-1";
       #    mode = "1920x1080";
       #    status = "enable";
       #  }
       #  {
       #    criteria = "HDMI-A-1";
       #    status = "enable";
       #  }
       #];
       #laptop = mkProfile "laptop" [
       #  {
       #    criteria = "eDP-1";
       #    status = "enable";
       #    mode = "1920x1080";
       #    position = "0,0";
       #  }
       #];
      };
  };
}