{
  config,
  lib,
  libNginx,
  ...
}:
let
  cfg = config.nixfiles.modules.uptime-kuma;
in
{
  options.nixfiles.modules.uptime-kuma = {
    enable = lib.mkEnableOption "Uptime Kuma";

    port = lib.mkOption {
      description = "Port.";
      type = lib.types.port;
      default = 9988;
    };

    domain = lib.mkOption {
      description = "Domain name sans protocol scheme.";
      type = lib.types.str;
      default = "uptime.${config.networking.domain}";
    };
  };

  config = lib.mkIf cfg.enable {
    ark.directories = [
      "/var/lib/private/uptime-kuma"
      "/var/lib/uptime-kuma"
    ];

    nixfiles.modules.nginx = {
      upstreams.uptime-kuma.servers."127.0.0.1:${toString cfg.port}" = { };
      virtualHosts.${cfg.domain} = {
        locations."/".proxyPass = "http://uptime-kuma";
        extraConfig = libNginx.config.internalOnly;
      };
    };

    services.uptime-kuma = {
      enable = true;
      settings = {
        UPTIME_KUMA_HOST = "127.0.0.1";
        UPTIME_KUMA_PORT = toString cfg.port;
      };
    };
  };
}