{ lib, config, ... }:

let
  # --- Module variables ---
  moduleName = "kitty";
  username   = config.defaultUser or "henrov";

  # Assets path relative to this module
  assetPath = ../../../assets/system/conf/${moduleName};

  # Read all files in the assets directory
  programFiles = builtins.readDir assetPath;
  files = lib.genAttrs (builtins.attrNames programFiles) (name: {
    src = "${assetPath}/${name}";
  });

  # Top-level toggle for this module
  enableProgram = config.enableKitty or true;
in
{
  # --- Declare the top-level toggle ---
  options.enableKitty = lib.mkEnableOption "Enable Kitty terminal integration";

  # --- Configuration applied only if enabled ---
  config = lib.mkIf enableProgram {

    # Dendritic container for the program
    myApps.${moduleName} = {
      enable    = true;
      user      = username;
      assetsDir = assetPath;
      files     = files;
      theme     = "Catppuccin-Mocha";
    };

    # Deploy config files to the user's ~/.config directory
    home-manager.users.${username} = {
      programs.kitty.enable = true;

      xdg.configFile =
        lib.mapAttrs' (name: value: {
          name  = "${moduleName}/${name}";
          value.source = value.src;
        }) files;
    };

    # Optional: systemd service to sync / deploy configuration
    systemd.services."${moduleName}-sync" = {
      description = "Sync ${moduleName} configuration";
      wantedBy    = [ "multi-user.target" ];
      wants       = [ "network-online.target" ];
      after       = [ "network-online.target" ];

      serviceConfig = {
        Type = "oneshot";
        ExecStart = ''
          set -euo pipefail
          CONF="${assetPath}"
          USER_HOME="/home/${username}"

          # Copy all asset files into user's config directory
          for f in ${lib.concatStringsSep " " (builtins.attrNames files)}; do
            cp -u "$CONF/$f" "$USER_HOME/.config/${moduleName}/$f"
          done
        '';
      };

      restartTriggers = [ assetPath ];

      # Minimal PATH for the service
      path = [
        # Only include binaries if necessary
        # pkgs.coreutils
        # pkgs.gnugrep
      ];
    };
  };
}