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

let
  activeTheme = config.nomarchy.theme;
  
  # Path to local theme files
  themeDir = ./themes + "/${activeTheme}";
  hasThemeConfig = builtins.pathExists (themeDir + "/config.jsonc");
  hasThemeStyle = builtins.pathExists (themeDir + "/style.css");
  
  # Default fallback files
  defaultConfig = ./config/config.jsonc;
  defaultStyle = ./config/style.css;
  
  # Selected files
  configFile = if hasThemeConfig then (themeDir + "/config.jsonc") else defaultConfig;
  styleFile = if hasThemeStyle then (themeDir + "/style.css") else defaultStyle;

  rawSettings = builtins.fromJSON (builtins.readFile configFile);

  # Modules that only make sense on a laptop. Filtered out of any
  # `modules-*` slot when nomarchy.formFactor != "laptop" so a desktop
  # build doesn't ship a permanently-empty battery indicator.
  laptopOnlyModules = [ "battery" "custom/battery" ];
  filterModules = mods:
    if config.nomarchy.formFactor == "laptop"
    then mods
    else builtins.filter (m: !(builtins.elem m laptopOnlyModules)) mods;

  settings = rawSettings // {
    modules-left   = filterModules (rawSettings.modules-left   or []);
    modules-center = filterModules (rawSettings.modules-center or []);
    modules-right  = filterModules (rawSettings.modules-right  or []);
  };

in
{
  programs.waybar = {
    enable = lib.mkDefault true;
    systemd.enable = lib.mkDefault true;

    settings = lib.mkDefault [ settings ];
    style = lib.mkDefault (builtins.readFile styleFile);
  };

  home.packages = lib.mkDefault (with pkgs; [
    font-awesome
  ]);
}