{
  config,
  lib,
  pkgs,
  ...
}:
let
  inherit (lib)
    mkIf
    mkForce
    ;

  cfg = config.services.kanidm.server;
  domainName = "idm.sorre.xyz";
in
{
  security.acme."${domainName}" = {
    group = "kanidm";
    postRun = ''
      cp --dereference --verbose {cert,key,chain}.pem /var/lib/kanidm/
      chown kanidm:kanidm /var/lib/kanidm/{cert,key,chain}.pem
      chmod 400 /var/lib/kanidm/{cert,key,chain}.pem
    '';
    reloadServices = [ "kanidm.service" ];
  };

  services.kanidm = {
    package = pkgs.kanidm_1_11;
    server = {
      enable = false;
      settings = {
        version = "2";
        role = "WriteReplica";
        bindaddress = "127.0.0.1:8443";
        domain = domainName;
        origin = "https://${domainName}";
        online_backup = {
          path = "/var/lib/backups/kanidm";
          # at 22:00 every day
          schedule = "00 22 * * *";
          versions = 5;
        };

        tls_chain = "/var/lib/kanidm/chain.pem";
        tls_key = "/var/lib/kanidm/key.pem";
      };
    };
  };

  systemd.services.kanidm = mkIf cfg.enable {
    # TODO: backups that aren't editable by the service itself
    serviceConfig.StateDirectory = mkForce "kanidm backups/kanidm";
  };
}