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

let
  configDir = ../../config;
  
  # Read the contents of the upstream config directory
  configEntries = builtins.readDir configDir;
  
  # Check for user overrides
  userConfigDir = config.nomarchy.configOverrides;
  userEntries = if userConfigDir != null && builtins.pathExists userConfigDir
                then builtins.readDir userConfigDir
                else {};

  # Files to explicitly exclude (handled elsewhere or not intended for ~/.config/)
  excludedFiles = [
    "nomarchy.ttf"
    "waybar"
    "walker"
    "alacritty"
    "swayosd"
  ];
  
  # Get all unique names from both sources
  allNames = lib.unique (builtins.attrNames configEntries ++ builtins.attrNames userEntries);
  
  # Filter the entries
  validEntries = builtins.filter (name: !(builtins.elem name excludedFiles)) allNames;

  # Generate the xdg.configFile attribute set
  # If a name exists in userEntries, it takes precedence.
  # For directories, we use `recursive = true;` to allow the user to create their own files alongside the read-only defaults.
  makeMapping = name: {
    inherit name;
    value = lib.mkDefault {
      source = if userEntries ? ${name} 
               then "${userConfigDir}/${name}" 
               else "${configDir}/${name}";
      recursive = (userEntries.${name} or configEntries.${name}) == "directory";
    };
  };

in
{
  xdg.configFile = (builtins.listToAttrs (map makeMapping validEntries)) // {
    "nomarchy" = {
      source = ../../config/nomarchy;
      recursive = true;
    };
    "hypr" = {
      source = ../../config/hypr;
      recursive = true;
    };
  };
}