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

usage() {
  cat <<'USAGE'
Usage:
  sudo script/ethercat/stop_ethercat.sh [iface] [--restore-network]

Examples:
  sudo script/ethercat/stop_ethercat.sh eno1
  sudo script/ethercat/stop_ethercat.sh eno1 --restore-network

Environment:
  IGH_ROOT=...         Override bundled IgH install path.
  ETHERCAT_CONF=...    Override ethercatctl config path.
USAGE
}

if [[ "${1:-}" == "-h" || "${1:-}" == "--help" ]]; then
  usage
  exit 0
fi

if [[ "$(id -u)" -ne 0 ]]; then
  echo "error: please run with sudo." >&2
  exit 1
fi

IFACE="eno1"
RESTORE_NETWORK="false"

for arg in "$@"; do
  case "${arg}" in
    --restore-network)
      RESTORE_NETWORK="true"
      ;;
    -*)
      echo "error: unknown option: ${arg}" >&2
      usage >&2
      exit 1
      ;;
    *)
      IFACE="${arg}"
      ;;
  esac
done

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
IGH_ROOT="${IGH_ROOT:-${REPO_ROOT}/dependency/x86/third_party/ethercat/v1.7.0}"
ETHERCAT_CONF="${ETHERCAT_CONF:-${IGH_ROOT}/etc/ethercat.conf}"
ETHERCATCTL="${IGH_ROOT}/sbin/ethercatctl"

if [[ ! -x "${ETHERCATCTL}" ]]; then
  echo "error: ethercatctl not found: ${ETHERCATCTL}" >&2
  exit 1
fi

"${ETHERCATCTL}" -c "${ETHERCAT_CONF}" stop

if [[ "${RESTORE_NETWORK}" == "true" ]]; then
  ip link set "${IFACE}" up
  if command -v nmcli >/dev/null 2>&1; then
    nmcli device connect "${IFACE}" || true
  fi
  echo "Stopped EtherCAT and requested normal network restore on ${IFACE}."
else
  echo "Stopped EtherCAT. Normal network restore skipped."
  echo "Use '--restore-network' if this interface should return to NetworkManager."
fi