{
  pkgs,
  lib,
  config,
  ...
}:
{
  niveum.bots.celan = {
    enable = true;
    time = "08:00";
    telegram = {
      enable = true;
      tokenFile = config.age.secrets.telegram-token-kmein.path;
      chatIds = [ "@PaulCelan" ];
    };
    mastodon = {
      enable = true;
      tokenFile = config.age.secrets.mastodon-token-celan.path;
      language = "de";
    };
    command = toString (
      pkgs.writers.writePython3 "random-celan.py" { libraries = [ pkgs.python3Packages.lxml ]; } ''
        from lxml import etree
        import random


        def xml_text(elements):
            return "".join("".join(t.itertext()) for t in elements).strip()


        tree = etree.parse('${
          pkgs.fetchurl {
            url = "http://c.krebsco.de/celan.tei.xml";
            hash = "sha256-HgNmJYfhuwyfm+FcNtnnYWpJpIIU1ElHLeLiIFjF9mE=";
          }
        }')
        root = tree.getroot()

        tei = {"tei": "http://www.tei-c.org/ns/1.0"}

        poems = root.xpath(".//tei:lg[@type='poem']", namespaces=tei)

        poem = random.choice(poems)

        for stanza in poem.xpath("./tei:lg[@type='stanza']", namespaces=tei):
            for line in stanza.xpath('./tei:l', namespaces=tei):
                if line.text:
                    print(line.text.strip())
            print()

        current_element = poem
        while current_element is not None:
            if current_element.tag == "{http://www.tei-c.org/ns/1.0}text":
                text_element = current_element

                title = xml_text(text_element.xpath("./tei:front/tei:docTitle",
                                 namespaces=tei))
                print(f"Aus: #{title.replace(" ", "_")}", end=" ")

                if date := xml_text(text_element.xpath("./tei:front/tei:docDate",
                                    namespaces=tei)):
                    print(f"({date})")
                break
            current_element = current_element.getparent()

        print("\n\n#PaulCelan #Celan #Lyrik #poetry")
      ''
    );
  };

  age.secrets = {
    mastodon-token-celan.file = ../../secrets/mastodon-token-celan.age;
  };

  systemd.timers.bot-celan.timerConfig.RandomizedDelaySec = "10h";

  niveum.passport.services = [
    {
      title = "Paul Celan Bot";
      description = "sends a random poem by Paul Celan to Telegram.";
      link = "https://t.me/PaulCelan";
    }
  ];
}