{ ... }:

let
  justfileText = ''
    [no-cd]
    manage module="":
      #!/usr/bin/env bash
      set -euo pipefail
      if [ -z "{{module}}" ]; then
        $EDITOR ~/.config/home-manager/home.nix;
      else
        $EDITOR ~/.config/home-manager/modules/{{module}}.nix;
      fi


    [no-cd]
    switch:
        home-manager switch --flake ~/.config/home-manager#$USER

    [no-cd]
    rebuild:
        sudo nixos-rebuild switch --flake "''${NIXOS_FLAKE:-/etc/nixos}#$HOSTNAME"

    [no-cd]
    clean:
        nix-collect-garbage -d

    [no-cd]
    update target="":
        #!/usr/bin/env bash
        set -euo pipefail

        update_system() {
          sudo nix flake update --flake "''${NIXOS_FLAKE:-/etc/nixos}"
          just rebuild
        }

        update_home() {
          nix flake update --flake "''${XDG_CONFIG_HOME:-$HOME/.config}/home-manager"
          just switch
        }

        case "{{target}}" in
          system) update_system ;;
          home)   update_home ;;
          "")     update_system; update_home ;;
          *)
            echo "usage: just update [system|home]   (empty = both)" >&2
            exit 1
            ;;
        esac

    [no-cd]
    init-home:
        #!/usr/bin/env bash
        set -euo pipefail

        src="/etc/skel/.config/home-manager"
        dst="''${XDG_CONFIG_HOME:-$HOME/.config}/home-manager"

        mkdir -p "$dst"
        chmod 700 "$dst" || true

        overwrite="0"
        if [[ "''${FORCE:-0}" == "1" ]]; then
          overwrite="1"
        elif [[ -e "$dst/flake.nix" || -e "$dst/home.nix" ]]; then
          read -r -p "Home Manager files already exist in $dst. Overwrite? [y/N] " ans
          case "''${ans:-}" in
            y|Y|yes|YES) overwrite="1" ;;
            *) overwrite="0" ;;
          esac
        fi

        for f in flake.nix home.nix; do
          if [[ "$overwrite" == "1" || ! -e "$dst/$f" ]]; then
            install -m 600 "$src/$f" "$dst/$f"
            echo "copied $f -> $dst/$f"
          else
            echo "kept   $dst/$f"
          fi
        done
  '';
in
{
  # Global Just recipes
  environment.etc."just/justfile".text = justfileText;
}