# The all-local deployment mode.
#
# `enableAllLocalDefaults` is a *mode*, not a default other options read:
# it says "this box is the whole deployment" and then asserts the values
# that follow from that. mara, on the issue: it is "more of a deployment
# mode via settings set, less a default setting".
#
# That distinction is why the derivations live here as `mkDefault` in a
# `config` block rather than as `default =` inside each option. An option
# declares what IT is and what it is when nobody asks; a mode declares
# what a deployment shape implies. Written the other way round, every
# service option had to name a flag it has no relationship to, and the
# answer to "what does all-local turn on?" was spread across five files.
#
# Adding an autoconfigurable thing later means one line here — not a
# `default =` in the new module pointing back at this flag.
{
  lib,
  config,
  ...
}:
let
  cfg = config.services.hyperhive;
in
{
  options.services.hyperhive.enableAllLocalDefaults = lib.mkOption {
    type = lib.types.bool;
    default = false;
    example = true;
    description = ''
      Run the whole swarm on this host. Turning this on asserts the
      swarm-level toggles that an all-on-one-box deployment implies:
      the swarm's shared services
      (`services.hyperhive.swarm.enableRequiredServices`) and the swarm
      CA (`services.hyperhive.swarm.ca.autoConfigure`).

      **Off by default, and that is the load-bearing part.** A swarm's
      services and its hives can live on different hosts, and a host has
      no way to tell which ones it is meant to be — so this is an
      operator saying "this is that box", never something inferred.
      Turn it on for a dev box or a single-hive swarm and get a working
      deployment with no further configuration; leave it off and every
      swarm-level artifact is operator-provided.

      Each toggle it asserts can still be set explicitly, which wins —
      so "all local except X" needs no new option.
    '';
  };

  # What the mode asserts. `mkDefault` (priority 1000) beats an option's
  # own `default` (1500) and loses to any explicit definition, which is
  # exactly the precedence a deployment mode wants: it fills in for an
  # operator who hasn't spoken, and never argues with one who has.
  config.services.hyperhive.swarm = {
    enableRequiredServices = lib.mkDefault cfg.enableAllLocalDefaults;
    ca.autoConfigure = lib.mkDefault cfg.enableAllLocalDefaults;
  };
}