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

let
  # URL for the theme
  themeUrl = "https://raw.githubusercontent.com/catppuccin/cosmic-desktop/main/themes/cosmic-settings/catppuccin-macchiato-blue%2Bround.ron";
  themeFile = pkgs.fetchurl {
    url = themeUrl;
    sha256 = "00hkydzjy87g18xqbg2a07hlh96akwnlbl1pdn006f3kkscyfkmr";
  };
in
{
  # Create a systemd user service to apply the theme
  systemd.user.services.apply-cosmic-theme = {
    description = "Apply Catppuccin Macchiato theme to Cosmic";
    wantedBy = [ "graphical-session.target" ];
    partOf = [ "graphical-session.target" ];
    script = ''
      mkdir -p %h/.config/cosmic/com.system76.CosmicTheme.Dark.Builder
      
      # The theme file from the repo is the "entries" part of the config.
      # We need to wrap it in the structure Cosmic expects: ( entries: ..., version: 1 )
      
      echo "(" > %h/.config/cosmic/com.system76.CosmicTheme.Dark.Builder/v1
      echo "  entries: " >> %h/.config/cosmic/com.system76.CosmicTheme.Dark.Builder/v1
      cat ${themeFile} >> %h/.config/cosmic/com.system76.CosmicTheme.Dark.Builder/v1
      echo "," >> %h/.config/cosmic/com.system76.CosmicTheme.Dark.Builder/v1
      echo "  version: 1" >> %h/.config/cosmic/com.system76.CosmicTheme.Dark.Builder/v1
      echo ")" >> %h/.config/cosmic/com.system76.CosmicTheme.Dark.Builder/v1

      # Ensure Dark Mode is enabled
      mkdir -p %h/.config/cosmic/com.system76.CosmicTheme.Mode
      echo '( entries: ( is_dark: true ), version: 1 )' > %h/.config/cosmic/com.system76.CosmicTheme.Mode/v1
    '';
    serviceConfig = {
      Type = "oneshot";
      RemainAfterExit = true;
    };
  };
}