{ config, lib, ... }:
let
  cfg = config.nixfiles.modules.acme;
in
{
  imports = [
    (lib.mkAliasOptionModule
      [ "certs" ]
      [
        "security"
        "acme"
        "certs"
      ]
    )
  ];

  options.nixfiles.modules.acme = {
    enable = lib.mkEnableOption "ACME";

    email = lib.mkOption {
      description = "Email for notifications.";
      type = lib.types.str;
      default = "hostmaster@${lib.my.domain.shire}";
    };
  };

  config = lib.mkIf cfg.enable {
    ark.directories = [ "/var/lib/acme" ];

    security.acme = {
      acceptTerms = true;
      defaults = { inherit (cfg) email; };
    };
  };
}