import { loadMindSpaceConfig } from './mindspace-config.mjs';
import { isPublicationIndexable } from './mindspace-index-policy.mjs';
import { createPlazaSeoService } from './plaza-seo.mjs';
import { resolvePublicBaseUrl } from './user-publish.mjs';

export function buildPublicationAbsoluteUrl(publicUrl, env = process.env) {
  const raw = String(publicUrl ?? '').trim();
  if (!raw) return null;
  if (/^https?:\/\//i.test(raw)) return raw.split('#')[0];
  const base = resolvePublicBaseUrl(env);
  if (raw.startsWith('/')) return `${base}${raw}`.split('#')[0];
  return `${base}/${raw.replace(/^\/+/, '')}`.split('#')[0];
}

export function resolveMindspaceBaiduSite(env = process.env) {
  const explicit = String(env.MINDSPACE_BAIDU_SITE ?? '').trim();
  if (explicit) return explicit;
  try {
    return new URL(resolvePublicBaseUrl(env)).hostname;
  } catch {
    return 'm.tkmind.cn';
  }
}

export function createMindspaceSeoNotifyService(
  pool,
  {
    env = process.env,
    plazaSeoFactory = createPlazaSeoService,
    loadMindSpaceConfigFn = loadMindSpaceConfig,
  } = {},
) {
  const pingBaidu = async (urls) => {
    const seo = plazaSeoFactory(pool, {
      siteBase: resolvePublicBaseUrl(env),
      baiduToken: env.MINDSPACE_BAIDU_PUSH_TOKEN ?? env.PLAZA_BAIDU_PUSH_TOKEN ?? '',
      baiduSite: resolveMindspaceBaiduSite(env),
    });
    return seo.pingBaidu(urls);
  };

  const notifyPublicationSearchEngines = async (publication) => {
    const config = await loadMindSpaceConfigFn(pool, { env }).catch(() => null);
    if (!config?.seoGeo?.enabled || !config.seoGeo.seo?.baiduPush) {
      return { pushed: false, reason: 'disabled' };
    }
    if (!isPublicationIndexable(publication)) {
      return { pushed: false, reason: 'not_indexable' };
    }
    const url = buildPublicationAbsoluteUrl(
      publication?.publicUrl ?? publication?.public_url,
      env,
    );
    if (!url) return { pushed: false, reason: 'missing_url' };
    try {
      return await pingBaidu([url]);
    } catch (error) {
      return { pushed: false, reason: error?.message || 'baidu_push_failed' };
    }
  };

  return {
    buildPublicationAbsoluteUrl: (publicUrl) => buildPublicationAbsoluteUrl(publicUrl, env),
    notifyPublicationSearchEngines,
    pingBaidu,
  };
}

export async function notifyPublicationSearchEngines(
  pool,
  publication,
  options = {},
) {
  const service = createMindspaceSeoNotifyService(pool, options);
  return service.notifyPublicationSearchEngines(publication);
}