#!/usr/bin/env bash
# Roll back the Link Health read-only plugin to the previously installed
# version captured by install_preview.sh. Strictly UI-only.

set -euo pipefail

PKG_NAME="luci-app-tr3000-status"
ROUTER="${ROUTER:-root@192.168.1.2}"
BACKUP_ROOT="/root/.v46.1-preview/luci-app-tr3000-status"
BACKUP_DIR="${1:?usage: rollback_preview.sh <backup_timestamp_dir>}"

echo "[info] rolling back from $BACKUP_ROOT/$BACKUP_DIR"
ssh -o BatchMode=yes "$ROUTER" "set -e
if [ -f '$BACKUP_ROOT/$BACKUP_DIR/prev_version' ]; then
  PKG_VERSION=\"\$(cat '$BACKUP_ROOT/$BACKUP_DIR/prev_version')\"
  echo \"[info] previous package version: \$PKG_VERSION\"
  if [ -n \"\$PKG_VERSION\" ]; then
    opkg install --force-reinstall --downgrade '$PKG_NAME'=\"\$PKG_VERSION\" || true
  fi
else
  echo '[warn] no prev_version file; will remove package only'
  opkg remove '$PKG_NAME' || true
fi
/etc/init.d/rpcd restart
/etc/init.d/uhttpd restart >/dev/null 2>&1 || true
echo '[ok] rolled back'
"