{ config, pkgs, ... }:

let
  outputDir = "/srv/http/calendars";
  script = pkgs.writeScript "caldav-export.py" ''
    #!${pkgs.python3}/bin/python3

    ${builtins.readFile ./caldav-export.py}
  '';
  pythonEnv = pkgs.python3.withPackages (
    ps: with ps; [
      caldav
      icalendar
      pyyaml
    ]
  );
in
{
  systemd = {
    services.caldav-export = {
      description = "Export CalDAV calendars to ICS";
      serviceConfig = {
        Type = "oneshot";
        ExecStart = "${pythonEnv}/bin/python ${script} ${config.age.secrets.caldav-export-config.path} -o ${outputDir}";
      };
    };
    timers.caldav-export = {
      description = "Daily CalDAV export";
      wantedBy = [
        "timers.target"
      ];
      timerConfig = {
        OnCalendar = "daily";
        Persistent = true;
      };
    };
  };
}