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

RUNTIME_ROOT="/opt/zlh/runtime/node"
ARTIFACT_ROOT="/opt/zlh/devcontainer/node"

VERSION="${RUNTIME_VERSION:-24}"

ARCHIVE="node-v${VERSION}.*-linux-x64.tar.xz"
SRC_DIR="${ARTIFACT_ROOT}/${VERSION}"
DEST_DIR="${RUNTIME_ROOT}/${VERSION}"

echo "[node] Installing Node.js version ${VERSION}"

# Ensure runtime root exists
mkdir -p "${RUNTIME_ROOT}"

# Idempotency check
if [ -d "${DEST_DIR}" ]; then
  echo "[node] Node ${VERSION} already installed"
else
  ARCHIVE_PATH=$(ls "${SRC_DIR}/${ARCHIVE}" 2>/dev/null || true)

  if [ -z "${ARCHIVE_PATH}" ]; then
    echo "[node][ERROR] Artifact not found for Node ${VERSION}"
    exit 1
  fi

  echo "[node] Extracting ${ARCHIVE_PATH}"
  mkdir -p "${DEST_DIR}"
  tar -xJf "${ARCHIVE_PATH}" -C "${DEST_DIR}" --strip-components=1
fi

# Update stable symlink
ln -sfn "${DEST_DIR}" "${RUNTIME_ROOT}/current"

# Permissions sanity
chmod -R 755 "${DEST_DIR}"

echo "[node] Node ${VERSION} installed successfully"