# "The swarm-wide services run HERE."
#
# A swarm has one forge, one matrix, one SSO. This says this host is
# where they live, and asserts the per-service `enable`s that follow —
# the same mode-not-default shape as ./local-defaults.nix, one tier down.
#
# Only the *optional* services derive: matrix and authelia. The forge has
# no `enable` to assert, because it is not optional — it is the canonical
# store for the meta flake and every agent's config repo, so it deploys
# with hyperhive itself.
{
  lib,
  config,
  ...
}:
let
  swarmCfg = config.services.hyperhive.swarm;
in
{
  options.services.hyperhive.swarm.enableRequiredServices = lib.mkOption {
    type = lib.types.bool;
    default = false;
    example = true;
    description = ''
      Host the swarm's shared services on this hive. The services that
      exist once per swarm rather than once per hive and are *optional*
      — the matrix homeserver, the SSO provider, the queue, the metrics
      and log stores — have their toggle asserted from this, so a
      swarm's service host is declared in one place.

      Those toggles live in two namespaces and the split is deliberate:
      {option}`services.hyperhive.deploy.*` for "does THIS host run it",
      `swarm.*.enable` for the ones not yet moved. See ./deploy.nix.

      The forge is swarm-wide too but has nothing to assert: it is the
      canonical store for the meta flake and every agent's config repo,
      so it deploys with hyperhive itself and is not optional.

      `services.hyperhive.enableAllLocalDefaults` turns this on as part
      of the all-on-one-box mode. Set it directly to run the swarm's
      services on a host that is not otherwise all-local — a dedicated
      services box with hives elsewhere is exactly that shape.

      With it off, this hive is a *client* of those services: it still
      configures how to reach them, it just doesn't run them.
    '';
  };

  # Same precedence reasoning as ./local-defaults.nix: fills in for an
  # operator who hasn't spoken, yields to one who has.
  #
  # Everything derives under `deploy.*` now, because "does THIS host run
  # it" is a per-host decision and `swarm.*` has to be identical on every
  # host. Same switch, same rule, one attribute path.
  config.services.hyperhive.deploy.matrix.enable = lib.mkDefault swarmCfg.enableRequiredServices;

  # The collector that feeds the pair above (note: no `swarm.` prefix,
  # this is ./otel.nix's existing per-hive option).
  config.services.hyperhive.otel.enable = lib.mkDefault swarmCfg.enableRequiredServices;

  # The rest of the shared services, deriving from the same switch as the
  # `swarm.*` ones above. They read differently only because "does THIS
  # host run it" lives in `deploy.*` (./deploy.nix) — `swarm.*` has to be
  # identical on every host, and these are exactly the values that must
  # differ.
  #
  # authelia: a swarm has one SSO provider, and this says it lives here.
  # With it off the hive is a *client* — `swarm.authelia.url` still points
  # at whoever runs it.
  config.services.hyperhive.deploy.authelia.enable = lib.mkDefault swarmCfg.enableRequiredServices;

  # The queue. Same rule: once per swarm, optional.
  config.services.hyperhive.deploy.nats.enable = lib.mkDefault swarmCfg.enableRequiredServices;

  # The swarm collector that feeds the metrics pair, and the only tier
  # holding the upstream credential. ⚠️ NOT the per-hive collector below,
  # which every hive runs.
  config.services.hyperhive.deploy.swarm-otel.enable = lib.mkDefault swarmCfg.enableRequiredServices;

  # The metrics pair, deriving together on purpose: a store with no UI is
  # unreadable and a UI with no store is empty, so there is no sensible
  # deployment that takes one and not the other from this switch. An
  # operator who wants exactly one still sets it directly, which
  # `mkDefault` allows.
  config.services.hyperhive.deploy.victoriametrics.enable =
    lib.mkDefault swarmCfg.enableRequiredServices;
  config.services.hyperhive.deploy.grafana.enable = lib.mkDefault swarmCfg.enableRequiredServices;

  # The log store, from the same switch for the same reason as the rest: a
  # hive that is not the service host is a *client* of it, not a second one.
  config.services.hyperhive.deploy.victorialogs.enable =
    lib.mkDefault swarmCfg.enableRequiredServices;

  # The secret store. Once per swarm and optional, so it belongs to the
  # same switch: a hive that does not run it is a *client*, reading its
  # own secrets from whoever does. `mkDefault` is what keeps the store
  # placeable on a host of its own — it can be set directly here and
  # turned off wherever this switch happens to be on.
  config.services.hyperhive.deploy.bao.enable = lib.mkDefault swarmCfg.enableRequiredServices;
}