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

{
  networking.hostName = "mqtt-ingest";

  services.gebos.secrets.ingester = true;
  # Broker authn/authz credentials (file-RBAC: ingester + admin MQTT users).
  services.gebos.secrets.hivemq = true;

  services.gebos.hivemq = {
    enable = true;
    # Persistent sessions on disk — single-node, devices reconnect on restart.
    persistentSessions = true;
    tlsPort = 8883;
  };

  services.gebos.ingester = {
    enable = true;
    # mqttBroker defaults to tcp://127.0.0.1:1883 (the local HiveMQ).
    postgresUrl = "postgres://gebos_ingest@10.0.0.2:5432/postgres?sslmode=require";
    # GEBOS_POSTGRES_PASSWORD sourced from /run/secrets/gebos-env (sops-nix).
  };

  # Caddy (layer4) terminates TLS on :8883 and forwards cleartext MQTT to
  # HiveMQ's loopback listener on :1883. tcpProxy is the upstream backend.
  services.gebos.caddy = {
    enable = true;
    sites = {
      "ingest.gebos.online" = { tcpProxy = "127.0.0.1:1883"; };
    };
  };

  # 8883: MQTTS for senders. 80/443: ACME challenge so Caddy can obtain/renew
  # the ingest.gebos.online cert that the layer4 TLS handler serves.
  networking.firewall.allowedTCPPorts = [ 80 443 8883 ];
}