#!/usr/bin/env bash
set -euo pipefail

# ---------------- CONFIG ----------------
SRC_FOLDER="./nixos"         # folder in your repo
DEST_FOLDER="/etc/nixos"     # target folder
# ----------------------------------------

# Check for root
if [[ $EUID -ne 0 ]]; then
  echo "This script must be run as root (sudo)." 1>&2
  exit 1
fi

echo "Copying files from '$SRC_FOLDER' to '$DEST_FOLDER'..."

# Backup existing /etc/nixos (optional)
BACKUP_DIR="/etc/nixos.bak.$(date +%Y%m%d%H%M%S)"
echo "Backing up current /etc/nixos to $BACKUP_DIR"
cp -r "$DEST_FOLDER" "$BACKUP_DIR"

# Copy files
cp -a "$SRC_FOLDER/." "$DEST_FOLDER/"

echo "Done! Files from '$SRC_FOLDER' have been copied to '$DEST_FOLDER'."
# echo "You may now run 'sudo nixos-rebuild switch' if needed."

nixos-rebuild switch --fast

echo "Done!"