#!/usr/bin/env bash
# shellcheck shell=bash

detect_server_ip() {
  local ip
  ip="$(hostname -I 2>/dev/null | awk '{print $1}')"
  if [[ -z "${ip}" ]]; then
    ip="$(ip -4 route get 1.1.1.1 2>/dev/null | awk '{for(i=1;i<=NF;i++) if($i=="src"){print $(i+1); exit}}')"
  fi
  echo "${ip:-127.0.0.1}"
}

need_root() {
  if [[ "$(id -u)" -ne 0 ]]; then
    echo "错误: 请使用 root 执行" >&2
    exit 1
  fi
}

ensure_node_pm2() {
  if ! command -v node >/dev/null 2>&1; then
    curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
    apt-get install -y nodejs
  fi
  if ! command -v pm2 >/dev/null 2>&1; then
    npm install -g pm2
  fi
}

verify_http() {
  local url="$1"
  curl -fsS --max-time 5 "${url}" >/dev/null 2>&1
}