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

let
  cfg = config.modules.services.<service_name>;
  ids = <gid_and_uid_number>;
  default_port = <port_number>;
  data_dir = "/var/lib/<service_name>";
in
{
  options.modules.services.<service_name> = {
    enable = lib.mkEnableOption "enables <service_name>";

    # set port options
    port = lib.mkOption {
      type = lib.types.int;
      default = cfg.default_port;
      description = "set port for <service_name> (default: ${toString default_port}";
    };

    backup = lib.mkOption {
      type = lib.types.bool;
      default = true;
      description = "enable backups for <service_name>";
    };
  };

  config = lib.mkIf cfg.enable {
    
    # declare <service_name> group
    users.groups.<service_name> = { gid = ids; };

    # declare <service_name> user
    users.users.<service_name> = {
      description = "<service_name> server user";
      uid = ids;
      isSystemUser = true;
      home = "/var/lib/<service_name>";
      createHome = true;
      group = "<service_name>";
      extraGroups = [ "media" ];
    };

    # enable the <service_name> service
    services.<service_name> = {
      enable = true;
      openFirewall = true;
      user = "<service_name>";
      group = "<service_name>";
      dataDir = data_dir;
      settings = {
        server.port = cfg.port;
      };
    };

    # override umask to make permissions work out
    systemd.services.<service_name>.serviceConfig = { UMask = lib.mkForce "0007"; };

#    # open firewall
#    networking.firewall.allowedTCPPorts = [ cfg.port ];

    # internal reverse proxy entry
    services.nginx.virtualHosts."<service_name>.snowbelle.lan" = {
      enableACME = false;
      forceSSL = true;
      sslCertificate = config.sops.secrets."ssl_blakedheld_crt".path;
      sslCertificateKey = config.sops.secrets."ssl_blakedheld_key".path;
      locations."/" = {
        proxyPass = "http://127.0.0.1:${toString cfg.port}";
      };
     # external reverse proxy entry
     services.nginx.virtualHosts."<service_name>.blakedheld.xyz" = {
      enableACME = false;
      forceSSL = true;
      sslCertificate = config.sops.secrets."ssl_blakedheld_crt".path;
      sslCertificateKey = config.sops.secrets."ssl_blakedheld_key".path;
      locations."/" = {
        proxyPass = "http://127.0.0.1:${toString cfg.port}";
      };
    };

     # add to backups
     modules.system.backups.paths = lib.mkIf cfg.backup [ data_dir ];
  };
}