import fs from 'node:fs';
import path from 'node:path';
import { fetch as undiciFetch } from 'undici';
import sharp from 'sharp';
import {
  buildPublicUrl,
  PUBLISH_ROOT_DIR,
  PUBLIC_ZONE_DIR,
  resolvePublicBaseUrl,
} from './user-publish.mjs';
import { extractPageTitle } from './wechat/verify/share-preview-repair.mjs';
import { convertDailyNewsHtmlToWechatInlineArticle } from './wechat-daily-news-inline.mjs';

const CONFIG_TABLE = 'h5_wechat_admin_config';
const CONFIG_KEY = 'news_morning_draft';
const RUNS_TABLE = 'h5_wechat_news_draft_runs';
const DEFAULT_WECHAT_TOKEN_URL = 'https://api.weixin.qq.com/cgi-bin/stable_token';
const DEFAULT_DRAFT_ADD_URL = 'https://api.weixin.qq.com/cgi-bin/draft/add';
const DEFAULT_MATERIAL_ADD_URL = 'https://api.weixin.qq.com/cgi-bin/material/add_material';
const DEFAULT_UPLOAD_IMG_URL = 'https://api.weixin.qq.com/cgi-bin/media/uploadimg';
const MAX_THUMB_BYTES = 64 * 1024;
export const NEWS_MORNING_TEMPLATE_VERSION = '2026-09-10';

/** 0910 新闻早报页面结构说明，供定时任务 taskSpec 与草稿转换共用。 */
export const NEWS_MORNING_TEMPLATE_0910_SPEC = [
  '生成「每日新闻早报」静态 HTML 页面，版式对齐 2026-09-10 生产版（daily-news-MMDD）：',
  '1. Hero 渐变区：主标题「📰 每日新闻早报」、date-badge、subtitle 导语；',
  '2. quick-links 锚点导航（要闻/天气/国际/国内/财经/科技/体育等）；',
  '3. 多个 section：section-title + card（tag、h3 标题、p 正文、source 来源）；',
  '4. 可选 weather、knowledge、history 等区块；',
  '5. footer 品牌；',
  '6. 文件名 daily-news-MMDD.html（如 daily-news-0910.html），并生成同名 .thumbnail.png；',
  '7. 推送微信草稿时转为内联 style HTML（参考公众号排版），禁止整页长图；正文需控制在 2 万字符内。',
].join('\n');

function normalizeBoolean(value, fallback = false) {
  if (value == null || value === '') return fallback;
  if (typeof value === 'boolean') return value;
  const normalized = String(value).trim().toLowerCase();
  if (['1', 'true', 'yes', 'on'].includes(normalized)) return true;
  if (['0', 'false', 'no', 'off'].includes(normalized)) return false;
  return fallback;
}

function parseConfigJson(value) {
  if (!value) return {};
  if (typeof value === 'object') return value;
  try {
    return JSON.parse(String(value));
  } catch {
    return {};
  }
}

function clampHour(value, fallback) {
  const num = Number(value);
  if (!Number.isFinite(num)) return fallback;
  return Math.min(23, Math.max(0, Math.floor(num)));
}

function clampMinute(value, fallback) {
  const num = Number(value);
  if (!Number.isFinite(num)) return fallback;
  return Math.min(59, Math.max(0, Math.floor(num)));
}

function slugPatternToRegExp(pattern) {
  const raw = String(pattern ?? '').trim() || 'daily-news-*';
  const escaped = raw.replace(/[.+^${}()|[\]\\]/g, '\\$&').replace(/\*/g, '.*');
  return new RegExp(`^${escaped}\\.html$`, 'i');
}

function formatShanghaiDateParts(date = new Date()) {
  const formatter = new Intl.DateTimeFormat('zh-CN', {
    timeZone: 'Asia/Shanghai',
    year: 'numeric',
    month: '2-digit',
    day: '2-digit',
  });
  const parts = formatter.formatToParts(date);
  const year = parts.find((item) => item.type === 'year')?.value ?? '';
  const month = parts.find((item) => item.type === 'month')?.value ?? '';
  const day = parts.find((item) => item.type === 'day')?.value ?? '';
  return {
    year,
    month,
    day,
    iso: `${year}-${month}-${day}`,
    mmdd: `${month}${day}`,
    compact: `${year}${month}${day}`,
  };
}

function isDailyNewsFormat(html) {
  return /daily-news|每日新闻早报/u.test(String(html ?? ''))
    || /class="date-badge"/u.test(String(html ?? ''));
}

function extractMetaDescription(html) {
  const match = String(html ?? '').match(
    /<meta[^>]+name=["']description["'][^>]+content=["']([^"']*)["']/i,
  );
  return match?.[1]?.trim() ?? '';
}

function stripHtml(value) {
  return String(value ?? '')
    .replace(/<br\s*\/?>/gi, '\n')
    .replace(/<[^>]+>/g, '')
    .replace(/\s+/g, ' ')
    .trim();
}

function extractCardArticlesFromHotspots(html) {
  const source = String(html ?? '');
  const parts = source.split(/<div class="card"[^>]*>/i).slice(1);
  const cards = parts.map((chunk) => chunk.split(/<div class="(?:trending|note|foot)"/i)[0] ?? chunk);
  return cards.map((block, index) => {
    const title = stripHtml(block.match(/<h2[^>]*>([\s\S]*?)<\/h2>/i)?.[1] ?? '');
    const tag = stripHtml(block.match(/<span class="tag"[^>]*>([\s\S]*?)<\/span>/i)?.[1] ?? '');
    const keys = [...block.matchAll(/<div class="k"[^>]*>([\s\S]*?)<\/div>/gi)]
      .map((item) => stripHtml(item[1]))
      .filter(Boolean);
    const context = stripHtml(block.match(/<div class="ctx"[^>]*>([\s\S]*?)<\/div>/i)?.[1] ?? '');
    const sourceLine = stripHtml(block.match(/<div class="src"[^>]*>([\s\S]*?)<\/div>/i)?.[1] ?? '');
    return { index: index + 1, title, tag, keys, context, source: sourceLine };
  }).filter((item) => item.title);
}

function extractCardArticlesFromDailyNews(html) {
  const source = String(html ?? '');
  const parts = source.split(/<div class="card(?:\s|")/i).slice(1);
  return parts.map((block, index) => {
    const title = stripHtml(
      block.match(/<h3[^>]*>([\s\S]*?)<\/h3>/i)?.[1]
      ?? block.match(/<h2[^>]*>([\s\S]*?)<\/h2>/i)?.[1]
      ?? '',
    );
    const tag = stripHtml(block.match(/<span class="tag"[^>]*>([\s\S]*?)<\/span>/i)?.[1] ?? '');
    const paragraphs = [...block.matchAll(/<p[^>]*>([\s\S]*?)<\/p>/gi)]
      .map((item) => stripHtml(item[1]))
      .filter(Boolean);
    const context = paragraphs[0] ?? '';
    const sourceLine = stripHtml(block.match(/<div class="source"[^>]*>([\s\S]*?)<\/div>/i)?.[1] ?? '');
    return { index: index + 1, title, tag, keys: [], context, source: sourceLine };
  }).filter((item) => item.title);
}

function extractCardArticles(html) {
  if (isDailyNewsFormat(html)) return extractCardArticlesFromDailyNews(html);
  return extractCardArticlesFromHotspots(html);
}

function extractDailyNewsSections(html) {
  return [...String(html ?? '').matchAll(/<div class="section-title"[^>]*>([\s\S]*?)<\/div>/gi)]
    .map((item) => stripHtml(item[1]))
    .filter(Boolean);
}

function extractStats(html) {
  return [...String(html ?? '').matchAll(/<div class="stat[^"]*"[^>]*><b>([\s\S]*?)<\/b><span>([\s\S]*?)<\/span><\/div>/gi)]
    .map((item) => ({ value: stripHtml(item[1]), label: stripHtml(item[2]) }))
    .filter((item) => item.value);
}

function extractTrendingSummary(html) {
  const block = String(html ?? '').match(/<div class="trending"[^>]*>([\s\S]*?)<\/div>/i)?.[1] ?? '';
  const chips = [...block.matchAll(/<span class="chip"[^>]*>([\s\S]*?)<\/span>/gi)]
    .map((item) => stripHtml(item[1]))
    .filter(Boolean);
  const paragraph = stripHtml(block.match(/<p[^>]*>([\s\S]*?)<\/p>/i)?.[1] ?? '');
  return { chips, paragraph };
}

export function resolveDailyNewsPublicBaseUrl(env = process.env) {
  return resolvePublicBaseUrl({
    ...env,
    H5_PUBLIC_BASE_URL:
      env.MEMIND_PAGE_PUBLIC_BASE_URL
      || env.H5_PORTAL_PUBLIC_BASE_URL
      || 'https://m.tkmind.cn',
  });
}

export function rewriteDailyNewsHtmlLinks(html, { publicBaseUrl, userId }) {
  const base = String(publicBaseUrl ?? '').replace(/\/$/, '');
  const owner = String(userId ?? '').trim();
  if (!base || !owner) return String(html ?? '');
  const publicPrefix = `${base}/MindSpace/${encodeURIComponent(owner)}/public/`;
  return String(html ?? '')
    .replace(/\shref=(["'])(?!https?:|#|mailto:|tel:)([^"']+)\1/gi, (match, quote, href) => {
      const target = href.startsWith('/') ? `${base}${href}` : `${publicPrefix}${href.replace(/^\.\//, '')}`;
      return ` href=${quote}${target}${quote}`;
    });
}

export function buildDailyNewsWechatHtmlContent(html, { publicUrl = '', publicBaseUrl = '', userId = '' } = {}) {
  const source = String(html ?? '');
  const styleBlock = source.match(/<style>([\s\S]*?)<\/style>/i)?.[0] ?? '';
  const bodyBlock = source.match(/<body>([\s\S]*?)<\/body>/i)?.[0] ?? '';
  let content = `${styleBlock}${bodyBlock}`;
  content = rewriteDailyNewsHtmlLinks(content, { publicBaseUrl, userId });
  if (publicUrl) {
    content += `<p style="margin:16px 0 0;font-size:13px;color:#718096;text-align:center;">阅读原文：<a href="${publicUrl}">${publicUrl}</a></p>`;
  }
  return content;
}

export function extractDailyNewsArticleMeta(html) {
  const title = extractPageTitle(html) || '每日新闻早报';
  const digest = (extractMetaDescription(html) || title).slice(0, 120);
  return { title: title.slice(0, 64), digest };
}

export function resolveMpFollowQrcodePath(memindLibRoot = process.cwd()) {
  const candidates = [
    path.join(memindLibRoot, 'wechat/assets/mp-follow-qrcode.png'),
    path.join(process.cwd(), 'wechat/assets/mp-follow-qrcode.png'),
  ];
  return candidates.find((candidate) => fs.existsSync(candidate)) ?? null;
}

export async function uploadWechatArticleContentImage(
  accessToken,
  imageBuffer,
  { wechatFetch = undiciFetch, uploadUrl = DEFAULT_UPLOAD_IMG_URL, filename = 'content.png' } = {},
) {
  if (!accessToken) throw new Error('缺少微信 access_token');
  if (!Buffer.isBuffer(imageBuffer) || imageBuffer.length === 0) {
    throw new Error('正文图片为空');
  }
  const form = new FormData();
  form.append(
    'media',
    new Blob([imageBuffer], { type: 'image/png' }),
    filename,
  );
  const endpoint = new URL(uploadUrl);
  endpoint.searchParams.set('access_token', accessToken);
  const payload = await readJsonResponse(
    await wechatFetch(endpoint.toString(), { method: 'POST', body: form }),
  );
  if (Number(payload?.errcode ?? 0) !== 0 || !String(payload?.url ?? '').trim()) {
    throw new Error(payload?.errmsg || '上传微信正文图片失败');
  }
  return String(payload.url);
}

export function buildDailyNewsWechatDraftArticle({
  html,
  publicUrl,
  qrcodeImageUrl = '',
} = {}) {
  const article = convertDailyNewsHtmlToWechatInlineArticle(html, { publicUrl, qrcodeImageUrl });
  return {
    ...article,
    cardCount: extractCardArticles(html).length,
    statsCount: extractStats(html).length,
  };
}

export async function buildDailyNewsWechatDraftArticleForPush({
  html,
  publicUrl,
  accessToken = null,
  wechatFetch = undiciFetch,
  memindLibRoot = process.cwd(),
} = {}) {
  let qrcodeImageUrl = '';
  if (accessToken) {
    const qrcodePath = resolveMpFollowQrcodePath(memindLibRoot);
    if (qrcodePath) {
      qrcodeImageUrl = await uploadWechatArticleContentImage(
        accessToken,
        fs.readFileSync(qrcodePath),
        { wechatFetch, filename: 'mp-follow-qrcode.png' },
      );
    }
  }
  return buildDailyNewsWechatDraftArticle({ html, publicUrl, qrcodeImageUrl });
}

export function convertNewsPageHtmlToWechatArticle(html, { publicUrl = '' } = {}) {
  const dailyNews = isDailyNewsFormat(html);
  if (dailyNews) {
    return buildDailyNewsWechatDraftArticle({ html, publicUrl });
  }
  const title = extractPageTitle(html) || '今日新闻热点分析';
  const digest = (extractMetaDescription(html) || title).slice(0, 120);
  const heroDate = dailyNews
    ? stripHtml(String(html).match(/<div class="date-badge"[^>]*>([\s\S]*?)<\/div>/i)?.[1] ?? '')
    : stripHtml(String(html).match(/<span class="date"[^>]*>([\s\S]*?)<\/span>/i)?.[1] ?? '');
  const heroSub = dailyNews
    ? stripHtml(String(html).match(/<div class="subtitle"[^>]*>([\s\S]*?)<\/div>/i)?.[1] ?? '')
    : stripHtml(String(html).match(/<p class="sub"[^>]*>([\s\S]*?)<\/p>/i)?.[1] ?? '');
  const stats = extractStats(html);
  const cards = extractCardArticles(html).slice(0, dailyNews ? 12 : undefined);
  const trending = extractTrendingSummary(html);
  const sectionTitles = dailyNews ? extractDailyNewsSections(html) : [];

  const sections = [];
  sections.push(`<p style="margin:0 0 12px;font-size:15px;color:#333;">${heroDate || title}</p>`);
  if (heroSub) {
    sections.push(`<p style="margin:0 0 16px;font-size:14px;color:#666;line-height:1.8;">${heroSub}</p>`);
  }
  if (sectionTitles.length > 0) {
    sections.push(
      `<p style="margin:0 0 16px;font-size:13px;color:#888;">栏目：${sectionTitles.slice(0, 8).join(' · ')}</p>`,
    );
  }
  if (stats.length > 0) {
    const statLine = stats.map((item) => `${item.value} ${item.label}`).join(' · ');
    sections.push(`<p style="margin:0 0 18px;font-size:14px;color:#444;"><strong>速览：</strong>${statLine}</p>`);
  }
  for (const card of cards) {
    const tagPrefix = card.tag ? `[${card.tag}] ` : '';
    sections.push(`<section style="margin:0 0 20px;">`);
    sections.push(`<p style="margin:0 0 8px;font-size:16px;font-weight:700;color:#111;">${card.index}. ${tagPrefix}${card.title}</p>`);
    if (card.keys.length > 0) {
      sections.push(`<p style="margin:0 0 8px;font-size:14px;color:#444;line-height:1.8;">${card.keys.join(' ｜ ')}</p>`);
    }
    if (card.context) {
      sections.push(`<p style="margin:0 0 8px;font-size:14px;color:#555;line-height:1.9;">${card.context}</p>`);
    }
    if (card.source) {
      sections.push(`<p style="margin:0;font-size:12px;color:#888;">${card.source}</p>`);
    }
    sections.push('</section>');
  }
  if (trending.chips.length > 0 || trending.paragraph) {
    sections.push('<section style="margin:0 0 16px;">');
    sections.push('<p style="margin:0 0 8px;font-size:15px;font-weight:700;color:#111;">社交平台热榜</p>');
    if (trending.chips.length > 0) {
      sections.push(`<p style="margin:0 0 8px;font-size:14px;color:#444;">${trending.chips.join(' · ')}</p>`);
    }
    if (trending.paragraph) {
      sections.push(`<p style="margin:0;font-size:14px;color:#555;line-height:1.8;">${trending.paragraph}</p>`);
    }
    sections.push('</section>');
  }
  if (publicUrl) {
    sections.push(
      `<p style="margin:16px 0 0;font-size:13px;color:#888;">阅读原文：<a href="${publicUrl}">${publicUrl}</a></p>`,
    );
  }

  return {
    title: title.slice(0, 64),
    digest,
    content: sections.join('\n'),
    contentSourceUrl: publicUrl || undefined,
    cardCount: cards.length,
    statsCount: stats.length,
  };
}

export function findLatestNewsMorningPage({
  h5Root,
  userId,
  slugPattern = 'news-hotspots-*',
  date = new Date(),
} = {}) {
  if (!h5Root || !userId) throw new Error('缺少 h5Root 或 userId');
  const publicDir = path.join(h5Root, PUBLISH_ROOT_DIR, String(userId), PUBLIC_ZONE_DIR);
  if (!fs.existsSync(publicDir)) {
    return null;
  }
  const matcher = slugPatternToRegExp(slugPattern);
  const { iso, mmdd, compact } = formatShanghaiDateParts(date);
  const datedCandidates = [];
  const fallbackCandidates = [];
  for (const entry of fs.readdirSync(publicDir, { withFileTypes: true })) {
    if (!entry.isFile() || !matcher.test(entry.name)) continue;
    const fullPath = path.join(publicDir, entry.name);
    const stat = fs.statSync(fullPath);
    const item = {
      slug: entry.name.replace(/\.html$/i, ''),
      relativePath: `${PUBLIC_ZONE_DIR}/${entry.name}`,
      localPath: fullPath,
      modifiedAt: stat.mtimeMs,
    };
    const slug = entry.name.replace(/\.html$/i, '');
    if (
      slug.endsWith(`-${mmdd}`)
      || entry.name.includes(iso)
      || entry.name.includes(compact)
      || entry.name.includes(iso.replace(/-/g, ''))
    ) {
      datedCandidates.push(item);
    } else {
      fallbackCandidates.push(item);
    }
  }
  const pool = datedCandidates.length > 0 ? datedCandidates : fallbackCandidates;
  if (pool.length === 0) return null;
  const slugRank = (slug) => {
    const match = String(slug).match(/(\d{4})(?!.*\d{4})/) ?? String(slug).match(/(\d{4})/);
    return match ? Number(match[1]) : 0;
  };
  pool.sort((a, b) => {
    const rankDiff = slugRank(b.slug) - slugRank(a.slug);
    if (rankDiff !== 0) return rankDiff;
    return b.modifiedAt - a.modifiedAt;
  });
  const selected = pool[0];
  const thumbPath = `${selected.localPath.replace(/\.html$/i, '')}.thumbnail.png`;
  return {
    ...selected,
    thumbPath: fs.existsSync(thumbPath) ? thumbPath : null,
  };
}

async function readJsonResponse(response) {
  const text = await response.text().catch(() => '');
  if (!response.ok) {
    throw new Error(text || `upstream ${response.status}`);
  }
  return text ? JSON.parse(text) : null;
}

async function normalizeThumbBuffer(buffer) {
  if (!Buffer.isBuffer(buffer) || buffer.length === 0) {
    throw new Error('封面图为空');
  }
  const attempts = [
    { width: 900, quality: 82 },
    { width: 720, quality: 70 },
    { width: 540, quality: 58 },
    { width: 420, quality: 48 },
  ];
  for (const attempt of attempts) {
    const normalized = await sharp(buffer, { sequentialRead: true })
      .rotate()
      .resize({ width: attempt.width, height: attempt.width, fit: 'cover' })
      .jpeg({ quality: attempt.quality, mozjpeg: true })
      .toBuffer();
    if (normalized.length <= MAX_THUMB_BYTES) {
      return { buffer: normalized, contentType: 'image/jpeg', filename: 'news-thumb.jpg' };
    }
  }
  throw new Error(`封面图压缩后仍超过微信 thumb 限制（${MAX_THUMB_BYTES} bytes）`);
}

export async function uploadWechatPermanentThumb(accessToken, imageBuffer, { wechatFetch = undiciFetch, uploadUrl = DEFAULT_MATERIAL_ADD_URL } = {}) {
  if (!accessToken) throw new Error('缺少微信 access_token');
  const normalized = await normalizeThumbBuffer(imageBuffer);
  const form = new FormData();
  form.append(
    'media',
    new Blob([normalized.buffer], { type: normalized.contentType }),
    normalized.filename,
  );
  const endpoint = new URL(uploadUrl);
  endpoint.searchParams.set('access_token', accessToken);
  endpoint.searchParams.set('type', 'thumb');
  const payload = await readJsonResponse(
    await wechatFetch(endpoint.toString(), { method: 'POST', body: form }),
  );
  if (Number(payload?.errcode ?? 0) !== 0 || !String(payload?.media_id ?? '').trim()) {
    throw new Error(payload?.errmsg || '上传微信封面素材失败');
  }
  return String(payload.media_id);
}

export async function addWechatDraftArticle(accessToken, article, { wechatFetch = undiciFetch, draftAddUrl = DEFAULT_DRAFT_ADD_URL } = {}) {
  if (!accessToken) throw new Error('缺少微信 access_token');
  const endpoint = new URL(draftAddUrl);
  endpoint.searchParams.set('access_token', accessToken);
  const payload = await readJsonResponse(
    await wechatFetch(endpoint.toString(), {
      method: 'POST',
      headers: { 'Content-Type': 'application/json; charset=utf-8' },
      body: JSON.stringify({ articles: [article] }),
    }),
  );
  if (Number(payload?.errcode ?? 0) !== 0 || !String(payload?.media_id ?? '').trim()) {
    throw new Error(payload?.errmsg || '写入微信草稿箱失败');
  }
  return {
    draftMediaId: String(payload.media_id),
    raw: payload,
  };
}

async function ensureConfigTable(pool) {
  await pool.query(`
    CREATE TABLE IF NOT EXISTS ${CONFIG_TABLE} (
      config_key VARCHAR(64) PRIMARY KEY,
      config_json JSON NOT NULL,
      updated_by CHAR(36) NULL,
      updated_at BIGINT NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
  `);
}

async function ensureRunsTable(pool) {
  await pool.query(`
    CREATE TABLE IF NOT EXISTS ${RUNS_TABLE} (
      id CHAR(36) PRIMARY KEY,
      status VARCHAR(16) NOT NULL,
      page_slug VARCHAR(255) NULL,
      page_url VARCHAR(512) NULL,
      draft_media_id VARCHAR(128) NULL,
      error_message TEXT NULL,
      triggered_by CHAR(36) NULL,
      created_at BIGINT NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
  `);
}

function defaultsFromEnv(env = process.env) {
  return {
    enabled: normalizeBoolean(env.H5_WECHAT_NEWS_MORNING_DRAFT_ENABLED, false),
    autoPushEnabled: normalizeBoolean(env.H5_WECHAT_NEWS_MORNING_DRAFT_AUTO, false),
    pushHour: clampHour(env.H5_WECHAT_NEWS_MORNING_DRAFT_HOUR, 6),
    pushMinute: clampMinute(env.H5_WECHAT_NEWS_MORNING_DRAFT_MINUTE, 0),
    timezone: String(env.H5_WECHAT_NEWS_MORNING_DRAFT_TZ ?? 'Asia/Shanghai').trim() || 'Asia/Shanghai',
    sourceUserId: String(env.H5_WECHAT_NEWS_MORNING_DRAFT_USER_ID ?? '').trim() || null,
    pageSlugPattern: String(env.H5_WECHAT_NEWS_MORNING_DRAFT_SLUG ?? 'daily-news-*').trim() || 'daily-news-*',
    author: String(env.H5_WECHAT_NEWS_MORNING_DRAFT_AUTHOR ?? 'TKMind').trim() || 'TKMind',
    templateVersion: NEWS_MORNING_TEMPLATE_VERSION,
  };
}

export function createWechatNewsMorningDraftService(
  pool,
  {
    mpConfig = null,
    h5Root = process.cwd(),
    memindLibRoot = h5Root,
    env = process.env,
    wechatFetch = undiciFetch,
  } = {},
) {
  let ensurePromise = null;
  let accessTokenCache = { token: '', expiresAt: 0 };

  async function ensureReady() {
    if (!ensurePromise) {
      ensurePromise = (async () => {
        await ensureConfigTable(pool);
        await ensureRunsTable(pool);
      })();
    }
    await ensurePromise;
  }

  async function readConfigRow() {
    await ensureReady();
    const [rows] = await pool.query(
      `SELECT config_json, updated_by, updated_at
         FROM ${CONFIG_TABLE}
        WHERE config_key = ?
        LIMIT 1`,
      [CONFIG_KEY],
    );
    return rows[0] ?? null;
  }

  function mergeConfig(row) {
    const defaults = defaultsFromEnv(env);
    const stored = parseConfigJson(row?.config_json);
    return {
      enabled: normalizeBoolean(stored.enabled, defaults.enabled),
      autoPushEnabled: normalizeBoolean(stored.autoPushEnabled, defaults.autoPushEnabled),
      pushHour: clampHour(stored.pushHour, defaults.pushHour),
      pushMinute: clampMinute(stored.pushMinute, defaults.pushMinute),
      timezone: String(stored.timezone ?? defaults.timezone).trim() || defaults.timezone,
      sourceUserId: String(stored.sourceUserId ?? defaults.sourceUserId ?? '').trim() || null,
      pageSlugPattern: String(stored.pageSlugPattern ?? defaults.pageSlugPattern).trim() || defaults.pageSlugPattern,
      author: String(stored.author ?? defaults.author).trim().slice(0, 8) || defaults.author,
      templateVersion: NEWS_MORNING_TEMPLATE_VERSION,
    };
  }

  async function getAccessToken() {
    if (!mpConfig?.enabled) throw new Error('微信服务号未启用');
    if (accessTokenCache.token && accessTokenCache.expiresAt > Date.now() + 60_000) {
      return accessTokenCache.token;
    }
    const payload = await readJsonResponse(
      await wechatFetch(mpConfig.tokenUrl || DEFAULT_WECHAT_TOKEN_URL, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          grant_type: 'client_credential',
          appid: mpConfig.appId,
          secret: mpConfig.appSecret,
          force_refresh: false,
        }),
      }),
    );
    if (!payload?.access_token) {
      throw new Error(payload?.errmsg || '获取微信 access_token 失败');
    }
    accessTokenCache = {
      token: payload.access_token,
      expiresAt: Date.now() + Number(payload.expires_in ?? 7200) * 1000,
    };
    return accessTokenCache.token;
  }

  async function resolvePreview(configOverride = null) {
    const config = configOverride ?? mergeConfig(await readConfigRow());
    if (!config.sourceUserId) {
      throw new Error('请先配置新闻早报来源用户 ID');
    }
    const page = findLatestNewsMorningPage({
      h5Root,
      userId: config.sourceUserId,
      slugPattern: config.pageSlugPattern,
    });
    if (!page) {
      throw new Error(`未找到匹配 ${config.pageSlugPattern} 的新闻早报页面`);
    }
    const html = fs.readFileSync(page.localPath, 'utf8');
    const publicBaseUrl = resolveDailyNewsPublicBaseUrl(env);
    const publicUrl = buildPublicUrl(publicBaseUrl, config.sourceUserId, page.relativePath);
    const article = isDailyNewsFormat(html)
      ? buildDailyNewsWechatDraftArticle({ html, publicUrl })
      : convertNewsPageHtmlToWechatArticle(html, { publicUrl });
    return {
      config,
      page: {
        slug: page.slug,
        relativePath: page.relativePath,
        publicUrl,
        modifiedAt: page.modifiedAt,
        hasThumb: Boolean(page.thumbPath),
      },
      article,
      template: {
        version: NEWS_MORNING_TEMPLATE_VERSION,
        spec: NEWS_MORNING_TEMPLATE_0910_SPEC,
      },
    };
  }

  async function recordRun({
    status,
    pageSlug = null,
    pageUrl = null,
    draftMediaId = null,
    errorMessage = null,
    triggeredBy = null,
  }) {
    await ensureReady();
    const id = cryptoRandomId();
    const now = Date.now();
    await pool.query(
      `INSERT INTO ${RUNS_TABLE}
        (id, status, page_slug, page_url, draft_media_id, error_message, triggered_by, created_at)
       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
      [id, status, pageSlug, pageUrl, draftMediaId, errorMessage, triggeredBy, now],
    );
    return { id, status, pageSlug, pageUrl, draftMediaId, errorMessage, triggeredBy, createdAt: now };
  }

  return {
    async getConfig() {
      const row = await readConfigRow();
      return {
        ...mergeConfig(row),
        updatedAt: row?.updated_at ? Number(row.updated_at) : null,
        updatedBy: row?.updated_by ?? null,
      };
    },

    getTemplate() {
      return {
        version: NEWS_MORNING_TEMPLATE_VERSION,
        spec: NEWS_MORNING_TEMPLATE_0910_SPEC,
      };
    },

    async updateConfig(payload = {}, { updatedBy = null } = {}) {
      const current = await this.getConfig();
      const next = {
        enabled:
          payload.enabled === undefined
            ? current.enabled
            : normalizeBoolean(payload.enabled, current.enabled),
        autoPushEnabled:
          payload.autoPushEnabled === undefined
            ? current.autoPushEnabled
            : normalizeBoolean(payload.autoPushEnabled, current.autoPushEnabled),
        pushHour:
          payload.pushHour === undefined ? current.pushHour : clampHour(payload.pushHour, current.pushHour),
        pushMinute:
          payload.pushMinute === undefined
            ? current.pushMinute
            : clampMinute(payload.pushMinute, current.pushMinute),
        timezone:
          payload.timezone === undefined
            ? current.timezone
            : String(payload.timezone ?? current.timezone).trim() || current.timezone,
        sourceUserId:
          payload.sourceUserId === undefined
            ? current.sourceUserId
            : String(payload.sourceUserId ?? '').trim() || null,
        pageSlugPattern:
          payload.pageSlugPattern === undefined
            ? current.pageSlugPattern
            : String(payload.pageSlugPattern ?? current.pageSlugPattern).trim() || current.pageSlugPattern,
        author:
          payload.author === undefined
            ? current.author
            : String(payload.author ?? current.author).trim().slice(0, 8) || current.author,
        templateVersion: NEWS_MORNING_TEMPLATE_VERSION,
      };
      const now = Date.now();
      await pool.query(
        `INSERT INTO ${CONFIG_TABLE} (config_key, config_json, updated_by, updated_at)
         VALUES (?, ?, ?, ?)
         ON DUPLICATE KEY UPDATE
           config_json = VALUES(config_json),
           updated_by = VALUES(updated_by),
           updated_at = VALUES(updated_at)`,
        [CONFIG_KEY, JSON.stringify(next), updatedBy, now],
      );
      return this.getConfig();
    },

    async preview() {
      return resolvePreview();
    },

    async pushDraft({ triggeredBy = null, dryRun = false } = {}) {
      const config = await this.getConfig();
      if (!config.enabled) {
        throw new Error('新闻早报草稿推送未启用');
      }
      let preview = null;
      preview = await resolvePreview(config);
      if (dryRun) {
        return {
          dryRun: true,
          preview,
        };
      }
      try {
        const accessToken = await getAccessToken();
        let thumbBuffer = null;
        const page = findLatestNewsMorningPage({
          h5Root,
          userId: config.sourceUserId,
          slugPattern: config.pageSlugPattern,
        });
        if (page?.thumbPath) {
          thumbBuffer = fs.readFileSync(page.thumbPath);
        } else if (page?.localPath) {
          thumbBuffer = Buffer.from(
            '<svg xmlns="http://www.w3.org/2000/svg" width="900" height="900"><rect width="900" height="900" fill="#1a1a2e"/><text x="50%" y="50%" fill="#fff" font-size="48" text-anchor="middle" dominant-baseline="middle">今日新闻</text></svg>',
          );
          thumbBuffer = await sharp(thumbBuffer).png().toBuffer();
        }
        const thumbMediaId = await uploadWechatPermanentThumb(accessToken, thumbBuffer, { wechatFetch });
        const html = fs.readFileSync(page.localPath, 'utf8');
        const article = isDailyNewsFormat(html)
          ? await buildDailyNewsWechatDraftArticleForPush({
              html,
              publicUrl: preview.page.publicUrl,
              accessToken,
              wechatFetch,
              memindLibRoot,
            })
          : preview.article;
        const draft = await addWechatDraftArticle(
          accessToken,
          {
            title: article.title,
            author: config.author,
            digest: article.digest,
            content: article.content,
            content_source_url: article.contentSourceUrl,
            thumb_media_id: thumbMediaId,
            need_open_comment: 0,
            only_fans_can_comment: 0,
          },
          { wechatFetch },
        );
        preview = {
          ...preview,
          article,
        };
        const run = await recordRun({
          status: 'success',
          pageSlug: preview.page.slug,
          pageUrl: preview.page.publicUrl,
          draftMediaId: draft.draftMediaId,
          triggeredBy,
        });
        return {
          ok: true,
          draftMediaId: draft.draftMediaId,
          preview,
          run,
        };
      } catch (error) {
        const message = error instanceof Error ? error.message : String(error);
        const run = await recordRun({
          status: 'failed',
          pageSlug: preview?.page?.slug ?? null,
          pageUrl: preview?.page?.publicUrl ?? null,
          errorMessage: message,
          triggeredBy,
        });
        throw Object.assign(new Error(message), { run });
      }
    },

    async listRuns({ limit = 20 } = {}) {
      await ensureReady();
      const safeLimit = Math.min(Math.max(Number(limit) || 20, 1), 100);
      const [rows] = await pool.query(
        `SELECT id, status, page_slug AS pageSlug, page_url AS pageUrl,
                draft_media_id AS draftMediaId, error_message AS errorMessage,
                triggered_by AS triggeredBy, created_at AS createdAt
           FROM ${RUNS_TABLE}
          ORDER BY created_at DESC
          LIMIT ?`,
        [safeLimit],
      );
      return rows.map((row) => ({
        ...row,
        createdAt: Number(row.createdAt ?? 0),
      }));
    },
  };
}

function cryptoRandomId() {
  return globalThis.crypto?.randomUUID?.() ?? `${Date.now()}-${Math.random().toString(16).slice(2)}`;
}

export const wechatNewsMorningDraftInternals = {
  normalizeBoolean,
  defaultsFromEnv,
  slugPatternToRegExp,
  convertNewsPageHtmlToWechatArticle,
  buildDailyNewsWechatHtmlContent,
  buildDailyNewsWechatDraftArticle,
  findLatestNewsMorningPage,
};