const baseURLv4 = 'https://4.ipw.cn/';
const baseURLv6 = 'https://6.ipw.cn/';
// ipv6
// curl -6 ifconfig.co
// curl -6 icanhazip.com

// ipv4
// https://api.ipify.org/?format=text
// https://ipinfo.io/ip
import { app } from './app.ts';
import { exec } from 'child_process';
import { promisify } from 'util';
const execAsync = promisify(exec);

const curl6 = async (url: string): Promise<string> => {
  const { stdout } = await execAsync(`curl -6 -s "${url}"`);
  return stdout.trim();
};

app.route({
  path: 'ip',
  key: 'v4',
  description: '获取当前公网IPv4地址',
}).define(async (ctx) => {
  const response = await fetch(baseURLv4);
  const ip = (await response.text()).trim();
  if (!isIpv4(ip)) {
    ctx.throw?.('获取地址失败');
  }
  ctx.body = { ip };
}).addTo(app);

app.route({
  path: 'ip',
  key: 'v6',
  description: '获取当前公网IPv6地址',
}).define(async (ctx) => {
  let ip = ''
  try {
    ip = await curl6(baseURLv6);
  } catch (error) { }
  if (!isIpv6(ip)) {
    try {
      ip = await curl6('https://ifconfig.co/ip');
      console.log('尝试第二个接口获取IPv6地址:', ip);
    } catch (error) { }
  }
  if (!isIpv6(ip)) {
    ctx.throw?.('获取地址失败');
  }
  ctx.body = { ip };
}).addTo(app);


export const isIpv6 = (ip: string): boolean => {
  return ip.includes(':');
}

export const isIpv4 = (ip: string): boolean => {
  return ip.split('.').length === 4;
}