{
  config,
  pkgs,
  lib,
  ...
}:

let
  cfg = config.services.matrix-synapse;
in
{
  services.matrix-synapse = lib.mkIf cfg.enableBackgroundWorker {
    settings = {
      instance_map = {
        appservice = {
          path = "/run/matrix-synapse/background.sock";
        };
      };

      run_background_tasks_on = "background";
    };

    workers = {
      appservice = {
        worker_app = "synapse.app.generic_worker";
        worker_listeners = [
          {
            type = "http";
            path = "/run/matrix-synapse/background.sock";
            resources = [
              {
                names = [ "replication" ];
                compress = false;
              }
            ];
          }
        ];
      };
    };
  };
}