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

if [[ $# -lt 1 ]]; then
  echo "Usage: $0 <path-to-frontend-offline-deps.tar.gz>" >&2
  exit 1
fi

ARCHIVE="$1"
ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
FRONTEND="${ROOT}/frontend-web"

if [[ ! -f "${ARCHIVE}" ]]; then
  echo "Archive not found: ${ARCHIVE}" >&2
  exit 1
fi

echo "Restoring frontend dependencies to ${FRONTEND} ..."

if [[ -d "${FRONTEND}/node_modules" ]]; then
  rm -rf "${FRONTEND}/node_modules.bak"
  mv "${FRONTEND}/node_modules" "${FRONTEND}/node_modules.bak"
  echo "  Existing node_modules backed up to node_modules.bak"
fi

tar -xzf "${ARCHIVE}" -C "${FRONTEND}"

for rel in node_modules/.pnpm node_modules/react/package.json node_modules/vite/package.json; do
  if [[ ! -e "${FRONTEND}/${rel}" ]]; then
    echo "Restore incomplete — missing ${rel}" >&2
    exit 1
  fi
done

echo ""
echo "Restore complete. You can now run:"
echo "  cd frontend-web"
echo "  pnpm dev"