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

with lib;

let
  cfg = config.infra.autoUpdate;
in {
  options.infra.autoUpdate = {
    enable = mkEnableOption "automatic system upgrades";

    flake = mkOption {
      type = types.nullOr types.str;
      default = null;
      description = "Flake URI to build from";
    };

    flags = mkOption {
      type = types.listOf types.str;
      default = [ "--commit-lock-file" ];
      description = "Extra flags passed to nix flake update";
    };

    dates = mkOption {
      type = types.str;
      default = "04:00";
      description = "Schedule for the upgrade";
    };

    allowReboot = mkOption {
      type = types.bool;
      default = false;
      description = "Reboot the system after an upgrade if needed";
    };

    randomizedDelaySec = mkOption {
      type = types.str;
      default = "45min";
      description = "Randomized delay added to the schedule";
    };
  };

  config = mkIf cfg.enable {
    system.autoUpgrade = {
      enable = true;
      inherit (cfg) dates flags allowReboot randomizedDelaySec;
      flake = cfg.flake;
    };
  };
}