{
  pkgs,
  config,
  lib,
  ...
}:
let
  cfg = config.xyno.user-services.khal;
in
{
  options.xyno.user-services.khal.enable = lib.mkEnableOption "enable khal and vdirsyncer";
  options.xyno.user-services.khal.wantedBy = lib.mkOption {
    type = lib.types.str;
    default = "niri.service";
  };
  config = lib.mkIf cfg.enable {
    environment.systemPackages = [
      pkgs.khal
      pkgs.vdirsyncer
    ];
    systemd.packages = [ pkgs.vdirsyncer ];
    environment.etc."xdg/khal/config".text = ''
      [locale]
      weeknumbers = right
      timeformat = "%H:%M"
      longdatetimeformat = "%Y-%m-%dT%H:%M:%S"
      datetimeformat = "%Y-%m-%dT%H:%M:%S"
      dateformat = "%Y-%m-%d"
      longdateformat = "%Y-%m-%d"
      [calendars]
      [[calendars]]
      path = ~/.calendars/*
      type = discover
    '';
    systemd.user.services.vdirsyncer = {
      environment.VDIRSYNCER_CONFIG = config.sops.secrets."vdirsyncer".path;
      unitConfig = {
        After = "network-online.target";
        Wants = "network-online.target";
      };
      serviceConfig = {
        Type = "oneshot";
      };
      script = ''
        ${pkgs.vdirsyncer}/bin/vdirsyncer metasync
        ${pkgs.vdirsyncer}/bin/vdirsyncer sync
      '';
    };
    systemd.user.timers.vdirsyncer = {
      wantedBy = [ cfg.wantedBy "timers.target" ];
      timerConfig = {
        OnCalendar = "*:0/15:00";
        Unit = "vdirsyncer.service";
      };
    };
    environment.sessionVariables.VDIRSYNCER_CONFIG = config.sops.secrets."vdirsyncer".path;
    sops.secrets."vdirsyncer" = {
      sopsFile = ../../secrets/desktop/calendar.yaml;
      group = "users";
      owner = config.xyno.system.user.name;
    };
  };
}