{ config, lib, pkgs, ... }:
let
  cfg = config.my.services.transmission;
  secrets = config.age.secrets;
in
{
  options.my.services.transmission = with lib; {
    enable = mkEnableOption "transmission torrent server";
    vhostName = mkOption {
      type = types.str;
      example = "music.fcuny.net";
      description = "Name for the virtual host";
    };
  };

  config = lib.mkIf cfg.enable {
    services.transmission = {
      enable = true;
      group = "nas";
      performanceNetParameters = true;
      home = "/data/fast/torrents";
      settings = {
        dht-enabled = false;
        cache-size-mb = 128;
        peer-port = 52213;
        peer-port-random-low = 49152;
        peer-port-random-high = 65535;
        message-level = 2;

        rpc-enabled = true;
        rpc-host-whitelist-enabled = false;
        verify-threads = 4;
      };
    };

    services.nginx.virtualHosts."${cfg.vhostName}" = {
      forceSSL = true;
      useACMEHost = cfg.vhostName;
      locations."/" = {
        proxyPass = "http://127.0.0.1:9091";
        proxyWebsockets = true;
      };
    };

    security.acme.certs."${cfg.vhostName}" = {
      dnsProvider = "gcloud";
      credentialsFile = secrets."acme/credentials".path;
    };

    networking.firewall = {
      allowedTCPPorts = [ 52213 ];
      allowedUDPPorts = [ 52213 ];
    };
  };
}