nixos/modules/snapclient.nix

{
  pkgs,
  lib,
  config,
  ...
}:
let cfg = config.services.snapclient; in 
{
  options.services.snapclient.enable = lib.mkEnableOption "a local snapclient service";
  options.services.snapclient.latency = lib.mkOption {
    type = lib.types.number;
    description = "latency of the PCM device";
    default = 0;
  };

  config.systemd.user.services.snapclient = lib.mkIf cfg.enable {
    wantedBy = lib.warnIfNot config.services.pipewire.enable "Pipewire is not running, snapclient won't work" [
      "pipewire.service"
      "default.target"
    ];
    after = [
      "pipewire.service"
    ];
    serviceConfig = {
      ExecStart = "${pkgs.snapcast}/bin/snapclient --host snapserver --player pulse --latency ${builtins.toString cfg.latency}";
      Slice="session.slice";
    };
  };
}