/**
 * Shared local test domain configuration.
 *
 * Default: *.localhost — browsers resolve these to 127.0.0.1 without /etc/hosts
 * or fighting Cloudflare wildcard DNS on *.tkmind.cn (which serves AndU publicly).
 *
 *   h5.localhost   → MindSpace H5 (Vite :5173)
 *   adm.localhost  → memind_adm (:8082)
 *   pla.localhost  → Plaza Next.js (:3001)
 *   ops.localhost  → Ops console SPA (:3002)
 *
 * HTTPS unified entry: https://<host>:8443  (pnpm dev:local-proxy, no sudo)
 */
import fs from 'node:fs';

export const LOCAL_IP = process.env.LOCAL_TEST_IP ?? '127.0.0.1';
export const DNS_PORT = Number(process.env.LOCAL_TEST_DNS_PORT ?? 5533);
export const DNS_MARKER = 'tkmind-local-test';

export const H5_HOST = process.env.H5_LOCAL_HOST ?? 'h5.localhost';
export const ADMIN_HOST = process.env.ADMIN_LOCAL_HOST ?? 'adm.localhost';
export const PLAZA_HOST = process.env.PLAZA_LOCAL_HOST ?? 'pla.localhost';
export const OPS_HOST = process.env.OPS_LOCAL_HOST ?? 'ops.localhost';

export const TEST_HOSTS = [H5_HOST, ADMIN_HOST, PLAZA_HOST, OPS_HOST];

export const USES_LOCALHOST = TEST_HOSTS.every((host) => host === 'localhost' || host.endsWith('.localhost'));

export const PUBLIC_SCHEME = (
  process.env.LOCAL_TEST_SCHEME ??
  (String(process.env.LOCAL_TEST_HTTPS ?? '1') === '0' ? 'http' : 'https')
).replace(/:$/, '');

export const PUBLIC_PORT = Number(
  process.env.LOCAL_TEST_PUBLIC_PORT ?? (USES_LOCALHOST ? 8443 : PUBLIC_SCHEME === 'https' ? 443 : 80),
);

export function publicUrl(host, { path = '' } = {}) {
  const defaultPort = PUBLIC_SCHEME === 'https' ? 443 : 80;
  const portSuffix = PUBLIC_PORT === defaultPort ? '' : `:${PUBLIC_PORT}`;
  const normalizedPath = path.startsWith('/') ? path : path ? `/${path}` : '';
  return `${PUBLIC_SCHEME}://${host}${portSuffix}${normalizedPath}`;
}

export const H5_PUBLIC_BASE = (process.env.H5_PUBLIC_BASE_URL ?? publicUrl(H5_HOST)).replace(/\/$/, '');
export const ADMIN_PUBLIC_BASE = publicUrl(ADMIN_HOST).replace(/\/$/, '');
export const PLAZA_PUBLIC_BASE = (process.env.PLAZA_PUBLIC_BASE ?? publicUrl(PLAZA_HOST)).replace(/\/$/, '');
export const OPS_PUBLIC_BASE = publicUrl(OPS_HOST, { path: '/ops/' }).replace(/\/$/, '') + '/';

export function isLocalDevHostname(hostname) {
  return (
    hostname === 'localhost' ||
    hostname === '127.0.0.1' ||
    hostname === '::1' ||
    hostname.endsWith('.localhost')
  );
}

export function hostConfigured(host) {
  if (isLocalDevHostname(host)) return true;
  try {
    const hosts = fs.readFileSync('/etc/hosts', 'utf8');
    return new RegExp(`^\\s*${LOCAL_IP.replace('.', '\\.')}\\s+${host.replace('.', '\\.')}(\\s|$)`, 'm').test(
      hosts,
    );
  } catch {
    return false;
  }
}

export function resolverConfigured(host) {
  if (isLocalDevHostname(host)) return true;
  try {
    const body = fs.readFileSync(`/etc/resolver/${host}`, 'utf8');
    return body.includes(DNS_MARKER);
  } catch {
    return false;
  }
}

export function allHostsConfigured() {
  return TEST_HOSTS.every((host) => hostConfigured(host) && resolverConfigured(host));
}