{
  config,
  lib,
  ...
}: let
  cfg = config.az.tc;
in {
  imports = [./staging.nix ./production.nix];

  options.az.tc.site = lib.mkOption {
    type = lib.types.enum ["staging" "production"];
    default = "staging";
    description = "Site profile providing fleet-wide infrastructure defaults.";
  };

  config.assertions = lib.optional cfg.enable {
    assertion = builtins.elem cfg.site ["staging" "production"];
    message = "az.tc.site must be staging or production.";
  };
}