# System-level `nomarchy.system.*` options.
#
# Deliberately small: only things a downstream user plausibly disagrees
# with get a toggle. Everything else in the system module is set with
# lib.mkDefault, so plain NixOS options override it natively.
{ config, lib, ... }:

{
  options.nomarchy.system = {
    greeter.enable = lib.mkEnableOption "the greetd/tuigreet login screen" // { default = true; };

    greeter.autoLogin = lib.mkOption {
      type = lib.types.nullOr lib.types.str;
      default = null;
      defaultText = lib.literalExpression
        "(settings.greeter.autoLogin from state.json) or null";
      example = "ada";
      description = ''
        Log this user straight into Hyprland on boot (greetd
        initial_session); logging out lands on the normal greeter.

        Normally you leave this alone and use System › Auto-login, which
        writes `settings.greeter.autoLogin` in state.json —
        ./greeter.nix mkDefaults this option from it. The installer seeds
        that state on LUKS-encrypted machines: the disk passphrase already
        gates access, so a second prompt is ceremony. Setting this option by
        hand pins the choice and the menu toggle can no longer move it.
      '';
    };

    plymouth.enable = lib.mkEnableOption ''
      the Nomarchy Plymouth boot splash (logo + progress + LUKS prompt),
      background-tinted from state.json via nomarchy.system.stateFile.
      Recolors on system rebuilds — theme switches don't touch the initrd'' // { default = true; };

    stateFile = lib.mkOption {
      type = lib.types.nullOr lib.types.path;
      default = null;
      example = lib.literalExpression "./state.json";
      description = ''
        state.json for the system-side consumers (currently the
        Plymouth splash background). lib.mkFlake wires it automatically
        from your flake; null falls back to the Boreal base color.
      '';
    };

    fileManager.enable = lib.mkEnableOption ''
      the Thunar GUI file manager + backend services (gvfs/tumbler/udisks2)
      for point-and-click file management and the "open folder" handler.
      The keyboard-driven TUI flagship (yazi) is the nomarchy.yazi.* home
      option'' // { default = true; };

    audio.enable = lib.mkEnableOption "the Pipewire audio stack" // { default = true; };
    # default stays a plain `true` here; ./default.nix mkDefaults it from
    # settings.bluetooth.enable (menu Preferences › Bluetooth package). Reading
    # the state in the option default is the trap ROADMAP § "NixOS-side state
    # bridges (#116)" documents: `config.nomarchy.settings` does not exist on
    # the NixOS side, and `or true` silently swallowed that for years.
    bluetooth.enable = lib.mkEnableOption "Bluetooth support with blueman" // {
      default = true;
      defaultText = lib.literalExpression
        "(settings.bluetooth.enable from state.json) or true";
    };

    autoTimezone.enable = lib.mkEnableOption ''
      automatic timezone detection (geoclue + automatic-timezoned): the
      system timezone — and so the Waybar clock — follows your location, so
      travelling to another zone updates the time on its own. Off by default
      (it's a location service and needs the network); toggle it from the
      System menu, which lands the choice in the in-flake state file. Enabling
      it unsets the static time.timeZone for you (a runtime timezone needs
      /etc/localtime writable), so the menu toggle drives a system rebuild''
      // { default = false; };

    snapper.enable = lib.mkEnableOption ''
      hourly/daily BTRFS timeline snapshots of / via snapper, plus the
      `nixos-rebuild-snap` pre-rebuild-snapshot helper. No-op unless the
      root filesystem is BTRFS with a /.snapshots subvolume (the installer
      creates one)'';

    power = {
      enable = lib.mkEnableOption ''
        active power management. By default ships power-profiles-daemon —
        the upstream-aligned power-saver/balanced/performance model,
        switchable from the menu (nomarchy-menu power-profile) and shown
        in Waybar on laptops — plus thermald and a battery charge limit
        where applicable. Harmless on desktops (the profile daemon just
        offers balanced/performance)'' // { default = true; };

      backend = lib.mkOption {
        type = lib.types.enum [ "ppd" "tlp" ];
        default = "ppd";
        description = ''
          Which daemon governs CPU/platform power. "ppd"
          (power-profiles-daemon) is the default: a clean three-profile
          model with the menu switcher and Waybar indicator. "tlp" trades
          that for TLP's deeper, more aggressive battery tuning, at the
          cost of the profile switcher (TLP has no profile concept). The
          two manage the same knobs and are mutually exclusive.
        '';
      };

      laptop = lib.mkOption {
        type = lib.types.bool;
        default = false;
        description = ''
          Marks this machine as a laptop, gating battery-only features
          (the charge limit below). The installer sets it to true when it
          detects a battery at install time.
        '';
      };

      thermal.enable = lib.mkEnableOption ''
        thermald, Intel's thermal-management daemon, to avoid aggressive
        throttling under sustained load. Intel-only — the installer
        enables it when it detects a GenuineIntel CPU. Harmless alongside
        either backend'';

      batteryChargeLimit = lib.mkOption {
        type = lib.types.nullOr (lib.types.ints.between 50 100);
        # No state bridge at eval time, by design: ./power.nix's oneshot reads
        # settings.power.batteryChargeLimit out of the live state.json
        # with jq at *runtime* and prefers it over this baked value, so the
        # menu applies before (and without) a rebuild. This used to read
        # `config.nomarchy.settings…`, which does not exist on the NixOS side
        # and so was always null — dead, but harmless precisely because the
        # runtime path never depended on it (ROADMAP § state bridges, #116).
        default = null;
        # Dell Adaptive charge mode ignores the end threshold unless we
        # also select Custom (power.nix oneshot); see Latitude 5310 QA.
        example = 80;
        description = ''
          Stop charging at this percentage to extend battery lifespan,
          where the hardware exposes charge_control_end_threshold on a
          system battery (type=Battery under /sys/class/power_supply;
          name-agnostic — BAT0, CMB0, …).
          null leaves charging at the firmware default (menu writes 100).
          Backend-independent: the menu applies live via sysfs (udev
          GROUP=users on the threshold node) and persists settings in
          theme-state; a oneshot re-applies on boot and AC replug. On
          Dell (and similar) the oneshot also selects charge type Custom
          — Adaptive ignores the threshold while still reporting it.
          Needs nomarchy.system.power.laptop.
        '';
      };
    };
  };
}