import crypto from 'node:crypto';
import fs from 'node:fs';
import path from 'node:path';
import { fetch as undiciFetch } from 'undici';
import { developerToolsFromPolicy } from './capabilities.mjs';
import { mergeMessageContent } from './message-stream.mjs';
import { reconcileAgentSession } from './session-reconcile.mjs';
import { isScheduleIntent, parseScheduleIntent, shouldUseScheduleAssistant } from './schedule-intent.mjs';
import { PUBLISH_ROOT_DIR } from './user-publish.mjs';
import { downloadTemporaryMedia, persistWechatImage } from './wechat-media.mjs';
import { buildAckText } from './wechat/ack/ack-provider.mjs';

const DEFAULT_WECHAT_TOKEN_URL = 'https://api.weixin.qq.com/cgi-bin/stable_token';
const DEFAULT_WECHAT_CUSTOMER_SERVICE_URL =
  'https://api.weixin.qq.com/cgi-bin/message/custom/send';
const DEFAULT_WECHAT_JSAPI_TICKET_URL = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket';
const DEFAULT_ASR_TARGET = process.env.H5_ASR_TARGET ?? 'https://asr.tkmind.cn';
const DEFAULT_ACK_TEXT = '已收到，正在处理，完成后发到这里。';
const DEFAULT_PROGRESS_TEXT = '还在处理，请稍等片刻。';
const DEFAULT_STATUS_TEXT =
  '我在这边。上一条如果还没完成，我会继续把结果发给你；你也可以直接补一句要求。';
const DEFAULT_UNSUPPORTED_TEXT = '当前先支持文字消息，你可以直接发文字给我。';
const DEFAULT_UNBOUND_TEXT = '先点这里完成绑定，再继续和专属 Agent 对话：';
const DEFAULT_PROGRESS_DELAY_MS = 8000;
const PUBLIC_HTML_LINK_PATTERN =
  /https?:\/\/[^\s<>"')\]]+\/MindSpace\/([0-9a-f-]{36}|[a-z0-9._-]+)\/public\/([^\s<>"')\]]+\.html)/gi;
const SESSION_WORKSPACE_TOOL_NAMES = new Set([
  'write',
  'edit',
  'tree',
  'read_file',
  'write_file',
  'edit_file',
  'create_dir',
  'list_dir',
]);

function escapeRegExp(value) {
  return String(value ?? '').replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}

function escapeHtml(value) {
  return String(value ?? '')
    .replaceAll('&', '&amp;')
    .replaceAll('<', '&lt;')
    .replaceAll('>', '&gt;')
    .replaceAll('"', '&quot;')
    .replaceAll("'", '&#39;');
}

function parseXmlField(xml, field) {
  const cdataMatch = xml.match(new RegExp(`<${field}><!\\[CDATA\\[([\\s\\S]*?)\\]\\]><\\/${field}>`));
  if (cdataMatch) return cdataMatch[1];
  const plainMatch = xml.match(new RegExp(`<${field}>([\\s\\S]*?)<\\/${field}>`));
  return plainMatch ? plainMatch[1].trim() : '';
}

function parseWechatMessage(xml) {
  return {
    toUserName: parseXmlField(xml, 'ToUserName'),
    fromUserName: parseXmlField(xml, 'FromUserName'),
    createTime: Number(parseXmlField(xml, 'CreateTime') || 0),
    msgType: parseXmlField(xml, 'MsgType').toLowerCase(),
    content: parseXmlField(xml, 'Content'),
    msgId: parseXmlField(xml, 'MsgId'),
    mediaId: parseXmlField(xml, 'MediaId'),
    format: parseXmlField(xml, 'Format'),
    recognition: parseXmlField(xml, 'Recognition'),
    picUrl: parseXmlField(xml, 'PicUrl'),
    locationX: parseXmlField(xml, 'Location_X'),
    locationY: parseXmlField(xml, 'Location_Y'),
    scale: parseXmlField(xml, 'Scale'),
    label: parseXmlField(xml, 'Label'),
    title: parseXmlField(xml, 'Title'),
    description: parseXmlField(xml, 'Description'),
    url: parseXmlField(xml, 'Url'),
    thumbMediaId: parseXmlField(xml, 'ThumbMediaId'),
    event: parseXmlField(xml, 'Event').toLowerCase(),
    eventKey: parseXmlField(xml, 'EventKey'),
    latitude: parseXmlField(xml, 'Latitude'),
    longitude: parseXmlField(xml, 'Longitude'),
    precision: parseXmlField(xml, 'Precision'),
    encrypt: parseXmlField(xml, 'Encrypt'),
    rawXml: xml,
  };
}

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

async function readJsonBody(response) {
  const text = await response.text();
  if (!text) return { payload: null, text: '' };
  try {
    return { payload: JSON.parse(text), text };
  } catch {
    return { payload: null, text };
  }
}

function sanitizeAsrMessage(message) {
  if (!message || typeof message !== 'string') return '识别失败，请重试';
  const trimmed = message.trim();
  if (!trimmed) return '识别失败，请重试';
  if (/Failed to load audio|ffmpeg|Invalid data found when processing input|moov atom not found/i.test(trimmed)) {
    return '音频格式无法识别，请重新录制';
  }
  if (/timeout|timed out/i.test(trimmed)) return '识别超时，请重试';
  if (trimmed.length > 160) return `${trimmed.slice(0, 160)}…`;
  return trimmed;
}

function guessVoiceMimeType(format = '', contentType = '') {
  const normalizedContentType = String(contentType ?? '')
    .split(';')[0]
    .trim()
    .toLowerCase();
  if (normalizedContentType) return normalizedContentType;
  const normalizedFormat = String(format ?? '').trim().toLowerCase();
  if (normalizedFormat === 'amr') return 'audio/amr';
  if (normalizedFormat === 'wav') return 'audio/wav';
  if (normalizedFormat === 'mp3') return 'audio/mpeg';
  if (normalizedFormat === 'm4a') return 'audio/mp4';
  if (normalizedFormat === 'ogg') return 'audio/ogg';
  return 'application/octet-stream';
}

function deriveWechatEndpointFromUrl(sourceUrl, pathname) {
  if (!sourceUrl) return '';
  try {
    const url = new URL(sourceUrl);
    url.pathname = pathname;
    url.search = '';
    return url.toString();
  } catch {
    return '';
  }
}

function createUserMessage(text, metadata = {}) {
  return {
    id: crypto.randomUUID(),
    role: 'user',
    created: Math.floor(Date.now() / 1000),
    content: [{ type: 'text', text }],
    metadata: {
      userVisible: true,
      agentVisible: true,
      ...metadata,
    },
  };
}

function messageVisibleText(message) {
  if (!message?.content) return '';
  return message.content
    .filter((item) => item.type === 'text' && typeof item.text === 'string')
    .map((item) => item.text)
    .join('');
}

function pushMessage(messages, incoming) {
  const last = messages[messages.length - 1];
  if (last?.id && incoming?.id && last.id === incoming.id) {
    return [
      ...messages.slice(0, -1),
      {
        ...last,
        content: mergeMessageContent(last.content, incoming.content),
      },
    ];
  }
  return [...messages, incoming];
}

async function executeSessionReply(apiFetch, sessionId, requestId, prompt, metadata = {}) {
  const eventsResponse = await apiFetch(`/sessions/${sessionId}/events`, {
    method: 'GET',
    headers: { Accept: 'text/event-stream' },
  });
  if (!eventsResponse.ok || !eventsResponse.body) {
    const text = await eventsResponse.text().catch(() => '');
    throw new Error(text || '无法建立公众号消息事件流');
  }

  const replyResponse = await apiFetch(`/sessions/${sessionId}/reply`, {
    method: 'POST',
    body: JSON.stringify({
      request_id: requestId,
      user_message: createUserMessage(prompt, metadata),
    }),
  });
  if (!replyResponse.ok) {
    const text = await replyResponse.text().catch(() => '');
    throw new Error(text || 'Agent reply 请求失败');
  }
  replyResponse.body?.cancel().catch?.(() => {});

  const reader = eventsResponse.body.getReader();
  const decoder = new TextDecoder();
  let buffer = '';
  let messages = [];
  let hasScopedAssistantUpdate = false;

  while (true) {
    const { value, done } = await reader.read();
    if (done) break;
    buffer += decoder.decode(value, { stream: true });
    const frames = buffer.split('\n\n');
    buffer = frames.pop() ?? '';
    for (const frame of frames) {
      let data = '';
      for (const line of frame.split('\n')) {
        if (line.startsWith('data:')) data += line.slice(5).trim();
      }
      if (!data) continue;
      let event;
      try {
        event = JSON.parse(data);
      } catch {
        continue;
      }
      const routingId = event.chat_request_id ?? event.request_id;
      if (routingId && routingId !== requestId) continue;

      if (event.type === 'Message' && event.message?.metadata?.userVisible) {
        const hasActionRequired = event.message.content?.some((item) => item.type === 'actionRequired');
        if (hasActionRequired) {
          throw new Error('当前回复需要人工确认，公众号通道暂不支持');
        }
        if (event.message.role === 'assistant') hasScopedAssistantUpdate = true;
        messages = pushMessage(messages, event.message);
      } else if (event.type === 'UpdateConversation') {
        // Ignore unscoped snapshots until this request has yielded an assistant update.
        // Otherwise a stale session snapshot can overwrite the current reply with a
        // previous page/link from the same WeChat-dedicated session.
        if (hasScopedAssistantUpdate) {
          messages = (event.conversation ?? []).filter((item) => item.metadata?.userVisible);
        }
      } else if (event.type === 'Error') {
        throw new Error(event.error || '任务执行失败');
      } else if (event.type === 'Finish') {
        const assistant = [...messages].reverse().find((item) => item.role === 'assistant');
        if (!hasScopedAssistantUpdate || !assistant) {
          throw new Error('本轮未收到可发送的新回复，请稍后重试');
        }
        return {
          text: messageVisibleText(assistant),
          tokenState: event.token_state ?? null,
          messages,
        };
      }
    }
  }

  throw new Error('公众号消息事件流提前结束');
}

const WECHAT_CUSTOMER_TEXT_MAX_BYTES = 2048;

function splitWechatText(text, maxBytes = WECHAT_CUSTOMER_TEXT_MAX_BYTES) {
  const normalized = String(text ?? '').trim();
  if (!normalized) return ['我先收到了，但这次没有生成可发送的文本结果。'];

  const chunks = [];
  let offset = 0;
  while (offset < normalized.length) {
    let byteCount = 0;
    let end = offset;
    while (end < normalized.length) {
      const charBytes = Buffer.byteLength(normalized[end], 'utf8');
      if (byteCount + charBytes > maxBytes) break;
      byteCount += charBytes;
      end += 1;
    }
    if (end === offset) break;
    chunks.push(normalized.slice(offset, end));
    offset = end;
  }
  return chunks.length > 0 ? chunks : ['我先收到了，但这次没有生成可发送的文本结果。'];
}

export { splitWechatText, WECHAT_CUSTOMER_TEXT_MAX_BYTES };

function flattenSessionTools(extensions = []) {
  return new Set(
    extensions.flatMap((extension) =>
      Array.isArray(extension?.available_tools) ? extension.available_tools : [],
    ),
  );
}

function needsWorkspaceTools(sessionPolicy) {
  return developerToolsFromPolicy(sessionPolicy).some((tool) => SESSION_WORKSPACE_TOOL_NAMES.has(tool));
}

async function readSessionExtensions(fetchForSession, sessionId) {
  const payload = await readJsonResponse(await fetchForSession(sessionId, `/sessions/${sessionId}/extensions`));
  return payload?.extensions ?? [];
}

async function sessionHasRequiredTools(fetchForSession, sessionId, sessionPolicy) {
  if (!needsWorkspaceTools(sessionPolicy)) return true;
  const desired = developerToolsFromPolicy(sessionPolicy).filter((tool) => SESSION_WORKSPACE_TOOL_NAMES.has(tool));
  if (desired.length === 0) return true;
  const available = flattenSessionTools(await readSessionExtensions(fetchForSession, sessionId));
  return desired.some((tool) => available.has(tool));
}

function extractHtmlWriteTargets(messages = []) {
  const targets = new Set();
  for (const message of messages) {
    for (const item of message?.content ?? []) {
      if (item?.type !== 'toolRequest') continue;
      const toolCall = item.toolCall?.value;
      const name = toolCall?.name;
      const args = toolCall?.arguments ?? {};
      const action = String(args.action ?? '').toLowerCase();
      const writeLikeDeveloper = name === 'developer' && action === 'write';
      const normalizedName = String(name ?? '').trim();
      const writeLikeSandbox =
        (normalizedName === 'write_file' ||
          normalizedName === 'edit_file' ||
          normalizedName.endsWith('__write_file') ||
          normalizedName.endsWith('__edit_file')) &&
        typeof args.path === 'string';
      if (!writeLikeDeveloper && !writeLikeSandbox) continue;
      const candidate = String(args.path ?? '').trim();
      if (candidate.toLowerCase().endsWith('.html')) targets.add(candidate);
    }
  }
  return [...targets];
}

function looksLikeHtmlGenerationIntent(text) {
  const normalized = String(text ?? '').trim().toLowerCase();
  if (!normalized) return false;
  return /(?:生成|创建|做|写|帮我.*(?:生成|创建|做|写)).*(?:html|页面|网页|page|文件)/i.test(normalized);
}

function usedStaticPagePublishSkill(messages = []) {
  return messages.some((message) =>
    message?.content?.some((item) => {
      if (item?.type !== 'toolRequest') return false;
      const toolCall = item.toolCall?.value;
      const name = String(toolCall?.name ?? '').trim();
      const args = toolCall?.arguments ?? {};
      const skillName = String(args.name ?? '').trim();
      return name === 'load_skill' && skillName === 'static-page-publish';
    }),
  );
}

function isBareCompletionText(text) {
  const normalized = String(text ?? '').trim();
  return /^(?:已完成|完成了|完成)$/u.test(normalized);
}

function hasAnyToolRequest(messages = []) {
  return messages.some((message) =>
    message?.content?.some((item) => item?.type === 'toolRequest'),
  );
}

function isSuspiciousBareCompletionReply(reply, intent) {
  if (!looksLikeHtmlGenerationIntent(intent?.agentText)) return false;
  if (!isBareCompletionText(reply?.text)) return false;
  if (extractHtmlWriteTargets(reply?.messages ?? []).length > 0) return false;
  return !hasAnyToolRequest(reply?.messages ?? []);
}

function looksLikePublishSuccessClaim(text) {
  const normalized = String(text ?? '').trim();
  if (!normalized) return false;
  return /(?:页面|网页|html).*(?:已创建|已生成|已发布|创建完毕|生成完成|发布成功)|(?:成功发布|已经发布|已创建完毕).*(?:页面|网页|html)/iu.test(normalized);
}

async function hasAnyValidPublishedHtmlLink(text, linkExists) {
  const value = String(text ?? '');
  for (const match of value.matchAll(PUBLIC_HTML_LINK_PATTERN)) {
    try {
      if (await linkExists(match[0])) return true;
    } catch {
      // treat lookup failures as missing links
    }
  }
  return false;
}

async function isSuspiciousHtmlPublishClaimReply(reply, intent, { linkExists = defaultPublicHtmlLinkExists } = {}) {
  if (!looksLikeHtmlGenerationIntent(intent?.agentText)) return false;
  const text = String(reply?.text ?? '').trim();
  if (!looksLikePublishSuccessClaim(text)) return false;
  if (extractHtmlWriteTargets(reply?.messages ?? []).length > 0) return false;
  return !(await hasAnyValidPublishedHtmlLink(text, linkExists));
}

function isMissingRequiredPublishSkill(reply, intent) {
  if (!looksLikeHtmlGenerationIntent(intent?.agentText)) return false;
  const wroteHtml = extractHtmlWriteTargets(reply?.messages ?? []).length > 0;
  if (!wroteHtml) return false;
  return !usedStaticPagePublishSkill(reply?.messages ?? []);
}

function buildPublicHtmlUrl(workingDir, relativePath, publicBaseUrl) {
  const owner = path.basename(path.resolve(workingDir));
  const normalized = relativePath.split(path.sep).map(encodeURIComponent).join('/');
  return `${String(publicBaseUrl ?? '').replace(/\/+$/, '')}/${PUBLISH_ROOT_DIR}/${encodeURIComponent(owner)}/${normalized}`;
}

function ensurePublicHtmlArtifact(htmlPath, workingDir) {
  const workspaceRoot = path.resolve(workingDir);
  const source = path.isAbsolute(String(htmlPath ?? ''))
    ? path.resolve(String(htmlPath))
    : path.resolve(workspaceRoot, String(htmlPath ?? ''));
  if (source !== workspaceRoot && !source.startsWith(`${workspaceRoot}${path.sep}`)) return null;
  if (!fs.existsSync(source) || !fs.statSync(source).isFile()) return null;

  const publicRoot = path.join(workspaceRoot, 'public');
  let publishedPath = source;
  if (source !== publicRoot && !source.startsWith(`${publicRoot}${path.sep}`)) {
    fs.mkdirSync(publicRoot, { recursive: true });
    publishedPath = path.join(publicRoot, path.basename(source));
    if (publishedPath !== source) fs.copyFileSync(source, publishedPath);
  }

  const relativePath = path.relative(workspaceRoot, publishedPath);
  if (!relativePath || relativePath.startsWith('..')) return null;
  return {
    localPath: publishedPath,
    relativePath,
  };
}

function collectPublishedHtmlArtifacts(reply, { workingDir, publicBaseUrl }) {
  const artifacts = [];
  const htmlTargets = extractHtmlWriteTargets(reply?.messages ?? []);
  for (const target of htmlTargets) {
    const artifact = ensurePublicHtmlArtifact(target, workingDir);
    if (!artifact) continue;
    artifacts.push({
      ...artifact,
      url: buildPublicHtmlUrl(workingDir, artifact.relativePath, publicBaseUrl),
    });
  }
  return artifacts;
}

function extractRequestedHtmlTarget(text) {
  const value = String(text ?? '');
  if (!value) return '';
  const explicitPublicMatch = value.match(/(?:^|[\s`'"])(public\/[a-z0-9._-]+\.html)\b/i);
  if (explicitPublicMatch?.[1]) return explicitPublicMatch[1];
  const bareMatch = value.match(/(?:^|[\s`'"])([a-z0-9._-]+\.html)\b/i);
  if (bareMatch?.[1]) return `public/${bareMatch[1]}`;
  return '';
}

function collectExpectedHtmlArtifacts(intent, { workingDir, publicBaseUrl }) {
  const target = extractRequestedHtmlTarget(intent?.agentText ?? intent?.content ?? '');
  if (!target) return [];
  const artifact = ensurePublicHtmlArtifact(target, workingDir);
  if (!artifact) return [];
  return [{
    ...artifact,
    url: buildPublicHtmlUrl(workingDir, artifact.relativePath, publicBaseUrl),
  }];
}

function sanitizeFilenameSlug(value) {
  const normalized = String(value ?? '')
    .toLowerCase()
    .replace(/[^a-z0-9]+/g, '-')
    .replace(/^-+|-+$/g, '');
  return normalized || 'simple-page';
}

function inferFallbackHtmlName(intent, reply) {
  const explicit = extractRequestedHtmlTarget(intent?.agentText ?? intent?.content ?? '');
  if (explicit) return explicit;
  const replyText = String(reply?.text ?? '');
  const linkMatch = replyText.match(/([a-z0-9._-]+\.html)\b/i);
  if (linkMatch?.[1]) return `public/${linkMatch[1]}`;
  const source = `${String(intent?.agentText ?? '')}\n${replyText}`;
  if (/泰国|thailand/i.test(source)) return 'public/thailand-guide.html';
  if (/夏日|summer/i.test(source)) return 'public/summer-guide.html';
  const topic = source
    .replace(/https?:\/\/\S+/g, '')
    .replace(/[^\p{L}\p{N}\s-]/gu, ' ')
    .trim()
    .split(/\s+/)
    .slice(0, 6)
    .join('-');
  return `public/${sanitizeFilenameSlug(topic)}.html`;
}

function extractFallbackPageTitle(intent, reply) {
  const lines = String(reply?.text ?? '')
    .split('\n')
    .map((line) => line.trim())
    .filter((line) => line && !/^https?:\/\//i.test(line) && !/^\[.+\]\(https?:\/\//i.test(line));
  const preferred = lines.find(
    (line) =>
      !/^(已完成|页面已生成|点击下方链接查看|查看页面|还在处理|明白|开始了)$/u.test(
        line.replace(/[🌴✨⭐️]/gu, '').trim(),
      ) &&
      !/成功发布|已发布|好消息|页面都已经/u.test(line),
  );
  if (preferred) return preferred.replace(/[🌴✨⭐️]/gu, '').trim();
  if (/泰国|thailand/i.test(String(intent?.agentText ?? ''))) return '泰国简易攻略';
  return '简版页面';
}

function hasAnyUrl(text) {
  return /https?:\/\/\S+/i.test(String(text ?? ''));
}

function hasAnyPublicHtmlLink(text) {
  return [...String(text ?? '').matchAll(PUBLIC_HTML_LINK_PATTERN)].length > 0;
}

function buildFallbackHtmlDocument(intent, reply, title) {
  const source = `${String(intent?.agentText ?? '')}\n${String(reply?.text ?? '')}`;
  if (/泰国|thailand/i.test(source)) {
    return `<!doctype html>
<html lang="zh-CN">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>${escapeHtml(title)}</title>
  <meta name="description" content="泰国旅行快速上手版，适合先看一遍再出发。">
  <meta name="mindspace-cover" content='{"tag":"旅行","emoji":"🇹🇭","accent":"#ff8a3d","accent2":"#185a9d","subtitle":"轻量版泰国出行建议"}'>
  <style>
    :root { color-scheme: light; --bg:#fff7ef; --card:#ffffff; --ink:#18212f; --muted:#5b6472; --accent:#ff8a3d; --accent2:#185a9d; }
    * { box-sizing:border-box; }
    body { margin:0; font-family:"PingFang SC","Noto Sans SC",sans-serif; background:linear-gradient(180deg,#fff4e8 0%,#f7fbff 100%); color:var(--ink); }
    main { max-width:760px; margin:0 auto; padding:40px 20px 72px; }
    .hero { background:linear-gradient(135deg,var(--accent),#ffd36e 58%,#fff 100%); border-radius:28px; padding:28px; box-shadow:0 20px 50px rgba(24,33,47,.12); }
    .eyebrow { font-size:13px; letter-spacing:.08em; text-transform:uppercase; opacity:.72; }
    h1 { margin:10px 0 12px; font-size:34px; line-height:1.15; }
    .summary { margin:0; max-width:520px; line-height:1.7; }
    section { margin-top:18px; background:var(--card); border-radius:22px; padding:22px; box-shadow:0 14px 34px rgba(24,33,47,.08); }
    h2 { margin:0 0 12px; font-size:20px; }
    ul { margin:0; padding-left:20px; line-height:1.8; }
    .grid { display:grid; gap:18px; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); }
    .tip { color:var(--muted); }
  </style>
</head>
<body>
  <main>
    <div class="hero">
      <div class="eyebrow">Thailand Quick Guide</div>
      <h1>${escapeHtml(title)}</h1>
      <p class="summary">适合第一次去泰国时先快速浏览：先定城市，再定节奏，预算和注意事项尽量简单清楚，出发前照着检查一遍就够了。</p>
    </div>
    <div class="grid">
      <section>
        <h2>推荐路线</h2>
        <ul>
          <li>曼谷 2 天：寺庙、夜市、商场和城市观景台。</li>
          <li>清迈 2 到 3 天：古城慢逛、咖啡馆、夜间集市。</li>
          <li>海岛 2 到 3 天：普吉、甲米或苏梅，选一个就够。</li>
        </ul>
      </section>
      <section>
        <h2>预算参考</h2>
        <ul>
          <li>住宿：普通酒店每晚约 200 到 500 元人民币。</li>
          <li>餐饮：街边小吃和简餐通常比较友好。</li>
          <li>交通：市内尽量打正规车或用常见打车软件。</li>
        </ul>
      </section>
    </div>
    <section>
      <h2>出发前准备</h2>
      <ul>
        <li>提前确认签证或入境政策，护照有效期留足。</li>
        <li>准备一点现金，热门景点与夜市会更方便。</li>
        <li>防晒、驱蚊、轻便衣物尽量提前备好。</li>
      </ul>
    </section>
    <section>
      <h2>注意事项</h2>
      <ul>
        <li>尊重寺庙着装要求，进入室内前留意是否需要脱鞋。</li>
        <li>海岛项目先问清价格和往返方式，避免临时加价。</li>
        <li>如果行程只想轻松一点，城市和海岛不要排太满。</li>
      </ul>
      <p class="tip">这是一个简版攻略页，后续如果你要，我也可以继续扩成 5 天行程版、夜市清单版或海岛专版。</p>
    </section>
  </main>
</body>
</html>`;
  }

  const description = `根据你的要求临时补出的简版页面：${String(intent?.agentText ?? '').trim() || '已生成可访问页面'}`;
  return `<!doctype html>
<html lang="zh-CN">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>${escapeHtml(title)}</title>
  <meta name="description" content="${escapeHtml(description)}">
  <meta name="mindspace-cover" content='{"tag":"页面","emoji":"📄","accent":"#2f6fed","accent2":"#0f172a","subtitle":"服务号自动补出简版页面"}'>
  <style>
    body { margin:0; font-family:"PingFang SC","Noto Sans SC",sans-serif; background:#f5f7fb; color:#172033; }
    main { max-width:760px; margin:0 auto; padding:48px 20px 72px; }
    article { background:#fff; border-radius:24px; padding:28px; box-shadow:0 18px 44px rgba(15,23,42,.08); }
    h1 { margin:0 0 12px; font-size:32px; }
    p, li { line-height:1.8; }
  </style>
</head>
<body>
  <main>
    <article>
      <h1>${escapeHtml(title)}</h1>
      <p>${escapeHtml(description)}</p>
      <ul>
        <li>这是服务号兜底生成的简版页面，先确保你能直接打开和分享。</li>
        <li>如果你还想加图片、配色、分栏或更完整内容，可以继续在当前话题上细化。</li>
      </ul>
    </article>
  </main>
</body>
</html>`;
}

function createFallbackPublishedHtmlArtifact(intent, reply, { workingDir, publicBaseUrl }) {
  if (!looksLikeHtmlGenerationIntent(intent?.agentText ?? intent?.content)) return null;
  const relativePath = inferFallbackHtmlName(intent, reply);
  const absolutePath = path.resolve(workingDir, relativePath);
  const workspaceRoot = path.resolve(workingDir);
  if (absolutePath !== workspaceRoot && !absolutePath.startsWith(`${workspaceRoot}${path.sep}`)) return null;
  fs.mkdirSync(path.dirname(absolutePath), { recursive: true });
  const title = extractFallbackPageTitle(intent, reply);
  fs.writeFileSync(absolutePath, buildFallbackHtmlDocument(intent, reply, title), 'utf8');
  const artifact = ensurePublicHtmlArtifact(relativePath, workingDir);
  if (!artifact) return null;
  return {
    ...artifact,
    url: buildPublicHtmlUrl(workingDir, artifact.relativePath, publicBaseUrl),
    fallbackTitle: title,
  };
}

function collectRecentPublishedHtmlArtifacts(
  intent,
  { workingDir, publicBaseUrl, sinceMs = 0, limit = 20 } = {},
) {
  const publicRoot = path.join(path.resolve(workingDir), 'public');
  if (!fs.existsSync(publicRoot) || !fs.statSync(publicRoot).isDirectory()) return [];

  const expectedTarget = extractRequestedHtmlTarget(intent?.agentText ?? intent?.content ?? '');
  const expectedRelativePath = expectedTarget ? expectedTarget.replace(/^\/+/, '').replace(/\\/g, '/') : '';
  const artifacts = [];
  const stack = [publicRoot];
  while (stack.length > 0 && artifacts.length < limit) {
    const current = stack.pop();
    let entries = [];
    try {
      entries = fs.readdirSync(current, { withFileTypes: true });
    } catch {
      continue;
    }
    for (const entry of entries) {
      const absolutePath = path.join(current, entry.name);
      if (entry.isDirectory()) {
        stack.push(absolutePath);
        continue;
      }
      if (!entry.isFile() || !entry.name.toLowerCase().endsWith('.html')) continue;
      let stat;
      try {
        stat = fs.statSync(absolutePath);
      } catch {
        continue;
      }
      if (sinceMs > 0 && Number(stat.mtimeMs ?? 0) + 1 < sinceMs) continue;
      const relativePath = path.relative(path.resolve(workingDir), absolutePath);
      if (!relativePath || relativePath.startsWith('..')) continue;
      artifacts.push({
        localPath: absolutePath,
        relativePath,
        url: buildPublicHtmlUrl(workingDir, relativePath, publicBaseUrl),
        mtimeMs: Number(stat.mtimeMs ?? 0),
        matchesExpected: expectedRelativePath
          ? relativePath.replace(/\\/g, '/') === expectedRelativePath
          : false,
      });
      if (artifacts.length >= limit) break;
    }
  }

  return artifacts
    .sort((left, right) => {
      if (left.matchesExpected !== right.matchesExpected) return left.matchesExpected ? -1 : 1;
      return right.mtimeMs - left.mtimeMs;
    })
    .map(({ mtimeMs, matchesExpected, ...artifact }) => artifact);
}

function rewritePublishedHtmlLinks(text, artifacts = []) {
  const value = String(text ?? '');
  if (!value || artifacts.length === 0) return value;
  let next = value;
  for (const artifact of artifacts) {
    const canonicalUrl = String(artifact?.url ?? '').trim();
    const filename = String(artifact?.relativePath ?? '').replace(/\\/g, '/').split('/').pop();
    if (!canonicalUrl || !filename) continue;
    const wrongPublicLinkPattern = new RegExp(
      `https?:\\/\\/[^\\s)]+\\/(?:MindSpace\\/[^\\s/]+\\/)?public\\/${escapeRegExp(filename)}\\b`,
      'g',
    );
    const wrongTkmindHtmlLinkPattern = new RegExp(
      `https?:\\/\\/(?:[^\\s./]+\\.)*tkmind\\.cn\\/[^\n\\s)]*${escapeRegExp(filename)}\\b`,
      'gi',
    );
    next = next.replace(wrongPublicLinkPattern, canonicalUrl);
    next = next.replace(wrongTkmindHtmlLinkPattern, canonicalUrl);
    next = next.replace(PUBLIC_HTML_LINK_PATTERN, (match) => {
      if (match === canonicalUrl) return match;
      const matchedFilename = String(match).split('/').pop();
      return matchedFilename === filename ? canonicalUrl : match;
    });
  }
  return next;
}

async function maybeAttachPublishedHtmlLink(reply, { workingDir, publicBaseUrl, artifacts: providedArtifacts = null }) {
  const artifacts = Array.isArray(providedArtifacts)
    ? providedArtifacts
    : collectPublishedHtmlArtifacts(reply, { workingDir, publicBaseUrl });
  const baseText = rewritePublishedHtmlLinks(String(reply?.text ?? '').trim(), artifacts).trim();
  for (const artifact of artifacts) {
    const url = artifact.url;
    if (baseText.includes(url)) return baseText;
    return baseText
      ? `${baseText}\n\n查看页面：\n${url}`
      : `查看页面：\n${url}`;
  }
  return baseText;
}

function stripInternalWechatUsername(text) {
  return String(text ?? '').replace(/^\s*wx_[a-z0-9_]{4,64}\s*[,，、:：]\s*/i, '');
}

function replaceLeadingInternalWechatUsername(text, user) {
  const addressName = normalizeWechatName(user?.nickname) || normalizeWechatName(user?.displayName);
  if (!addressName) return stripInternalWechatUsername(text);
  return String(text ?? '').replace(
    /(^|[\s,，、:：])wx_[a-z0-9_]{4,64}\s*([,，、:：])\s*/gi,
    (_match, prefix = '', punctuation = '，') => `${prefix}${addressName}${punctuation}`,
  );
}

function convertMarkdownLinks(text) {
  return String(text ?? '').replace(/\[([^\]\n]{1,160})\]\((https?:\/\/[^\s)]+)\)/g, (_match, label, url) => {
    const cleanLabel = String(label ?? '').trim();
    const cleanUrl = String(url ?? '').trim();
    return cleanLabel ? `${cleanLabel}\n${cleanUrl}` : cleanUrl;
  });
}

function splitMarkdownTableRow(line) {
  const trimmed = String(line ?? '').trim();
  if (!trimmed.includes('|')) return null;
  return trimmed
    .replace(/^\|/, '')
    .replace(/\|$/, '')
    .split('|')
    .map((cell) => cell.trim());
}

function isMarkdownTableSeparator(line) {
  const cells = splitMarkdownTableRow(line);
  return Boolean(cells?.length) && cells.every((cell) => /^:?-{3,}:?$/.test(cell));
}

function convertMarkdownTables(text) {
  const lines = String(text ?? '').split('\n');
  const output = [];
  for (let index = 0; index < lines.length; index += 1) {
    const headers = splitMarkdownTableRow(lines[index]);
    if (!headers || !isMarkdownTableSeparator(lines[index + 1])) {
      output.push(lines[index]);
      continue;
    }

    const readableRows = [];
    index += 2;
    while (index < lines.length) {
      const cells = splitMarkdownTableRow(lines[index]);
      if (!cells) break;
      const parts = cells
        .map((cell, cellIndex) => {
          const header = headers[cellIndex] || `列${cellIndex + 1}`;
          return cell ? `${header}：${cell}` : '';
        })
        .filter(Boolean);
      if (parts.length) readableRows.push(`- ${parts.join('；')}`);
      index += 1;
    }
    index -= 1;
    output.push(...readableRows);
  }
  return output.join('\n');
}

function stripMarkdownEmphasis(text) {
  return String(text ?? '')
    .replace(/\*\*([^*\n]+)\*\*/g, '$1')
    .replace(/__([^_\n]+)__/g, '$1')
    .replace(/`([^`\n]+)`/g, '$1')
    .replace(/\*/g, '')
    .replace(/__/g, '');
}

function formatWechatOutboundText(text, user = null) {
  return replaceLeadingInternalWechatUsername(
    stripMarkdownEmphasis(convertMarkdownTables(convertMarkdownLinks(text)))
      .replace(/^\s*#{1,6}\s+/gm, '')
      .replace(/^\s*---+\s*$/gm, '')
      .replace(/\n{3,}/g, '\n\n'),
    user,
  );
}

function defaultPublicHtmlLinkExists(urlText) {
  let url;
  try {
    url = new URL(urlText);
  } catch {
    return true;
  }
  const parts = url.pathname.split('/').filter(Boolean).map((part) => {
    try {
      return decodeURIComponent(part);
    } catch {
      return part;
    }
  });
  if (parts.length < 4 || parts[0] !== PUBLISH_ROOT_DIR || parts[2] !== 'public') return true;
  const owner = parts[1];
  const rest = parts.slice(3);
  if (!owner || rest.some((part) => !part || part === '.' || part === '..')) return false;
  const root = path.resolve(process.cwd(), PUBLISH_ROOT_DIR, owner, 'public');
  const target = path.resolve(root, ...rest);
  if (target !== root && !target.startsWith(`${root}${path.sep}`)) return false;
  return fs.existsSync(target) && fs.statSync(target).isFile();
}

export async function guardMissingPublicHtmlLinks(
  text,
  { linkExists = defaultPublicHtmlLinkExists } = {},
) {
  const value = String(text ?? '');
  const replacements = [];
  for (const match of value.matchAll(PUBLIC_HTML_LINK_PATTERN)) {
    const url = match[0];
    let exists = true;
    try {
      exists = await linkExists(url);
    } catch {
      exists = false;
    }
    if (!exists) {
      const filename = match[2].split('/').pop() ?? '页面';
      replacements.push([
        url,
        `（页面生成未完成，已阻止发送失效链接：${filename}。请重新生成页面后再打开。）`,
      ]);
    }
  }
  return replacements.reduce((next, [from, to]) => next.replaceAll(from, to), value);
}

function downgradePrematurePublishClaims(text) {
  const value = String(text ?? '');
  if (!value.includes('页面生成未完成')) return value;
  return value
    .replace(/(^|\n)([^\n]*页面都已经成功发布了[^\n]*)(?=\n|$)/g, '$1页面暂未生成完成，这次我先不发送失效链接。')
    .replace(/(^|\n)([^\n]*主题页面已发布[^\n]*)(?=\n|$)/g, '$1🌴 夏日主题页面生成未完成')
    .replace(/页面已创建完毕/g, '页面生成未完成')
    .replace(/页面已创建/g, '页面生成未完成')
    .replace(/发布成功/g, '生成未完成')
    .replace(/已发布成功/g, '生成未完成');
}

function rewriteFallbackPageSuccessText(text, fallbackArtifact) {
  if (!fallbackArtifact) return String(text ?? '');
  const fallbackTitle = String(fallbackArtifact.fallbackTitle ?? '简版页面').trim() || '简版页面';
  return [
    '已为你补出一个可直接打开的简版页面。',
    fallbackTitle,
    '查看页面：',
    fallbackArtifact.url,
  ]
    .filter(Boolean)
    .join('\n\n');
}

export { maybeAttachPublishedHtmlLink };

function isQuestionStatusProbe(text) {
  return /^[?？]+$/.test(String(text ?? '').trim());
}

function isSimpleGreeting(text) {
  const normalized = String(text ?? '')
    .trim()
    .replace(/[!！。.\s]+$/g, '')
    .toLowerCase();
  return /^(你好|您好|在吗|在不在|嗨|hi|hello|hey)$/.test(normalized);
}

function isConnectivityTest(text) {
  const normalized = String(text ?? '')
    .trim()
    .replace(/[!！。.\s]+$/g, '');
  return /^(测试\s*\d*|test\s*\d*)$/i.test(normalized);
}

function isTopicResetIntent(text) {
  const normalized = String(text ?? '').trim();
  return (
    /^(换(个)?话题|新问题|忽略之前|不管之前|重新开始|reset)$/i.test(normalized) ||
    /忽略.*之前|不要管.*之前|别管.*之前/.test(normalized)
  );
}

function normalizeNumber(value) {
  if (value === '' || value === null || value === undefined) return null;
  const num = Number(value);
  return Number.isFinite(num) ? num : null;
}

function normalizeWechatInboundIntent(inbound) {
  const msgType = String(inbound?.msgType ?? '').toLowerCase();
  const base = {
    appId: '',
    openid: String(inbound?.fromUserName ?? '').trim(),
    msgId: String(inbound?.msgId ?? '').trim(),
    msgType,
    displayText: '',
    agentText: '',
    raw: { ...inbound },
  };

  if (msgType === 'text') {
    const content = String(inbound?.content ?? '').trim();
    return {
      ...base,
      displayText: content,
      agentText: content,
    };
  }

  if (msgType === 'voice') {
    const recognition = String(inbound?.recognition ?? '').trim();
    return {
      ...base,
      displayText: recognition ? `语音：${recognition}` : '语音消息',
      agentText: recognition,
      media: {
        mediaId: inbound?.mediaId || '',
        format: inbound?.format || '',
      },
    };
  }

  if (msgType === 'image') {
    return {
      ...base,
      displayText: '收到图片，请描述你想让我怎么处理',
      agentText: '',
      media: {
        mediaId: inbound?.mediaId || '',
        picUrl: inbound?.picUrl || '',
      },
    };
  }

  if (msgType === 'location') {
    const latitude = normalizeNumber(inbound?.locationX);
    const longitude = normalizeNumber(inbound?.locationY);
    const scale = normalizeNumber(inbound?.scale);
    const label = String(inbound?.label ?? '').trim();
    const fragments = [
      label ? `用户发送了位置：${label}` : '用户发送了位置',
      latitude !== null ? `纬度：${latitude}` : '',
      longitude !== null ? `经度：${longitude}` : '',
      scale !== null ? `缩放：${scale}` : '',
    ].filter(Boolean);
    return {
      ...base,
      displayText: fragments.join('；'),
      agentText: fragments.join('；'),
      location: {
        latitude,
        longitude,
        scale,
        label,
      },
    };
  }

  if (msgType === 'link') {
    const title = String(inbound?.title ?? '').trim();
    const description = String(inbound?.description ?? '').trim();
    const url = String(inbound?.url ?? '').trim();
    const fragments = [
      '用户分享了链接',
      title ? `标题：${title}` : '',
      description ? `描述：${description}` : '',
      url ? `URL：${url}` : '',
    ].filter(Boolean);
    return {
      ...base,
      displayText: fragments.join('；'),
      agentText: fragments.join('；'),
      link: { title, description, url },
    };
  }

  if (msgType === 'video' || msgType === 'shortvideo') {
    return {
      ...base,
      displayText: msgType === 'shortvideo' ? '收到小视频' : '收到视频',
      agentText: '',
      media: {
        mediaId: inbound?.mediaId || '',
        thumbMediaId: inbound?.thumbMediaId || '',
      },
    };
  }

  if (msgType === 'event') {
    return {
      ...base,
      displayText: inbound?.event ? `事件：${inbound.event}` : '事件消息',
      agentText: '',
      location:
        inbound?.event === 'location'
          ? {
              latitude: normalizeNumber(inbound?.latitude),
              longitude: normalizeNumber(inbound?.longitude),
              precision: normalizeNumber(inbound?.precision),
            }
          : undefined,
    };
  }

  return base;
}

function buildWechatAgentPrompt(intent) {
  const msgType = String(intent?.msgType ?? 'text');
  const pagePublishHint = looksLikeHtmlGenerationIntent(intent?.agentText ?? intent?.content)
    ? [
        '【页面发布技能要求】这条消息是在生成可访问 HTML 页面。',
        '开始前必须先调用 `load_skill` → `static-page-publish`，不能省略，也不能写完页面后再补调。',
        '随后必须用 `write_file` / `edit_file` 写入 `public/*.html`。',
        '最终只给用户一个正式域名的唯一正确链接；不要输出错误域名、备用链接或让用户手动保存文件。',
        '',
      ].join('\n')
    : '';
  const scheduleAssistantHint = shouldUseScheduleAssistant(intent?.agentText ?? intent?.content)
    ? [
        '【日程技能要求】这条消息涉及待办、提醒或日程。',
        '开始前先加载 `schedule-assistant` skill，并严格按 skill 里的边界执行。',
        '只有在 `schedule_create_item` / `schedule_create_reminder` 等工具成功返回后，才能告诉用户“已经设置好了”。',
        intent?.msgId ? `调用 schedule_create_item 时必须传入 sourceMessageId: ${intent.msgId}` : '',
        '',
      ].filter(Boolean).join('\n')
    : '';
  if (msgType === 'voice') {
    return [
      scheduleAssistantHint,
      '【微信服务号语音消息】用户通过语音输入，以下是微信识别结果。',
      '',
      `用户语音识别文本：${String(intent?.agentText ?? '').trim()}`,
    ]
      .filter(Boolean)
      .join('\n');
  }
  if (msgType === 'image') {
    return [
      scheduleAssistantHint,
      '【微信服务号图片消息】用户发送了图片。',
      '如用户没有明确要求，请先根据图片内容给出简短理解，并询问下一步。',
      '',
      String(intent?.agentText ?? '').trim(),
    ]
      .filter(Boolean)
      .join('\n');
  }
  if (msgType === 'location') {
    const location = intent?.location ?? {};
    return [
      scheduleAssistantHint,
      '【微信服务号位置消息】用户发送了当前位置。',
      location.label ? `地址：${location.label}` : '',
      location.latitude !== null && location.latitude !== undefined
        ? `纬度：${location.latitude}`
        : '',
      location.longitude !== null && location.longitude !== undefined
        ? `经度：${location.longitude}`
        : '',
      '请结合位置回答用户可能的路线、附近、行程或提醒需求；如果意图不明确，先简短询问。',
    ]
      .filter(Boolean)
      .join('\n');
  }
  if (msgType === 'link') {
    const link = intent?.link ?? {};
    return [
      scheduleAssistantHint,
      '【微信服务号链接消息】用户分享了链接。',
      link.title ? `标题：${link.title}` : '',
      link.description ? `描述：${link.description}` : '',
      link.url ? `URL：${link.url}` : '',
    ]
      .filter(Boolean)
      .join('\n');
  }
  const content = String(intent?.agentText ?? intent?.content ?? '').trim();
  const lines = [];
  if (pagePublishHint) lines.push(pagePublishHint);
  if (scheduleAssistantHint) lines.push(scheduleAssistantHint);
  lines.push(
    '【微信服务号新消息】请只回答下面这条用户消息，不要主动延续无关的历史话题。',
    '若用户只是在测试连通性，请一句话确认收到即可，不要展开旧任务。',
    '',
    `用户消息：${content}`,
  );
  return lines.join('\n');
}

function looksLikeScheduleConfirmation(text) {
  const compact = String(text ?? '').replace(/\s+/g, '');
  if (!compact) return false;
  if (/(没有|没能|未能|无法|不能|失败|需要你|请补充|请告诉)/.test(compact)) return false;
  return /(已经|已|现在).{0,12}(设置|安排|记录|加上|添加|创建).{0,12}(待办|提醒|日程|安排|闹钟)|设置好了|已经设置好了|已经加上/.test(
    compact,
  );
}

function buildConnectivityTestReply(user) {
  const name = resolveWechatAddressName(user);
  return name
    ? `${name}，公众号消息通道正常，我收到你的测试了。`
    : '公众号消息通道正常，我收到你的测试了。';
}

function normalizeWechatName(value) {
  const name = String(value ?? '').trim();
  if (!name || /^wx_[a-z0-9_]{4,64}$/i.test(name)) return '';
  return name;
}

function resolveWechatAddressName(user) {
  return normalizeWechatName(user?.nickname) || normalizeWechatName(user?.displayName) || '';
}

function buildGreetingText(user) {
  const name = resolveWechatAddressName(user);
  return name ? `你好，${name}！我在呢，有什么需要？` : '你好！我在呢，有什么需要？';
}

function buildStatusText(user, fallbackText) {
  const name = resolveWechatAddressName(user);
  if (!name) return fallbackText;
  return `我在这边，${name}。上一条如果还没完成，我会继续把结果发给你；你也可以直接补一句要求。`;
}

function successResponse(task = null) {
  return {
    ok: true,
    status: 200,
    contentType: 'text/plain; charset=utf-8',
    body: 'success',
    ...(task ? { task } : {}),
  };
}

export function loadWechatMpConfig(env = process.env) {
  const appId = env.H5_WECHAT_MP_APP_ID?.trim() ?? env.H5_WECHAT_APP_ID?.trim() ?? '';
  const appSecret =
    env.H5_WECHAT_MP_APP_SECRET?.trim() ?? env.H5_WECHAT_APP_SECRET?.trim() ?? '';
  const token = env.H5_WECHAT_MP_TOKEN?.trim() ?? '';
  const publicBaseUrl = env.H5_PUBLIC_BASE_URL?.trim()?.replace(/\/$/, '') ?? '';
  const enabledFlag = env.H5_WECHAT_MP_ENABLED === '1';
  const bindPath = env.H5_WECHAT_MP_BIND_PATH?.trim() || '/auth/wechat/authorize?intent=login';
  return {
    enabled: enabledFlag && Boolean(appId && appSecret && token && publicBaseUrl),
    appId,
    appSecret,
    token,
    publicBaseUrl,
    bindPath,
    ackText: env.H5_WECHAT_MP_ACK_TEXT?.trim() || DEFAULT_ACK_TEXT,
    ackRandomEnabled: env.H5_WECHAT_MP_ACK_RANDOM !== '0',
    ackNicknameEnabled: env.H5_WECHAT_MP_ACK_NICKNAME !== '0',
    progressText: env.H5_WECHAT_MP_PROGRESS_TEXT?.trim() || DEFAULT_PROGRESS_TEXT,
    progressDelayMs: Math.max(
      0,
      Number(env.H5_WECHAT_MP_PROGRESS_DELAY_MS ?? DEFAULT_PROGRESS_DELAY_MS),
    ),
    statusText: env.H5_WECHAT_MP_STATUS_TEXT?.trim() || DEFAULT_STATUS_TEXT,
    unsupportedText: env.H5_WECHAT_MP_UNSUPPORTED_TEXT?.trim() || DEFAULT_UNSUPPORTED_TEXT,
    unboundTextPrefix: env.H5_WECHAT_MP_UNBOUND_TEXT_PREFIX?.trim() || DEFAULT_UNBOUND_TEXT,
    tokenUrl: env.H5_WECHAT_MP_TOKEN_URL?.trim() || DEFAULT_WECHAT_TOKEN_URL,
    customerServiceUrl:
      env.H5_WECHAT_MP_CUSTOMER_SERVICE_URL?.trim() || DEFAULT_WECHAT_CUSTOMER_SERVICE_URL,
    jsapiTicketUrl:
      env.H5_WECHAT_MP_JSAPI_TICKET_URL?.trim() ||
      deriveWechatEndpointFromUrl(env.H5_WECHAT_MP_TOKEN_URL?.trim(), '/cgi-bin/ticket/getticket') ||
      DEFAULT_WECHAT_JSAPI_TICKET_URL,
    mediaPublicBaseUrl:
      env.H5_WECHAT_MP_MEDIA_PUBLIC_BASE_URL?.trim()?.replace(/\/$/, '') || publicBaseUrl,
    maxImageBytes: Math.max(1, Number(env.H5_WECHAT_MP_MAX_IMAGE_BYTES ?? 10 * 1024 * 1024)),
    acceptVoice: env.H5_WECHAT_MP_ACCEPT_VOICE !== '0',
    acceptImage: env.H5_WECHAT_MP_ACCEPT_IMAGE !== '0',
    acceptLocation: env.H5_WECHAT_MP_ACCEPT_LOCATION !== '0',
    acceptLink: env.H5_WECHAT_MP_ACCEPT_LINK !== '0',
    encodingAesKey: env.H5_WECHAT_MP_ENCODING_AES_KEY?.trim() ?? '',
  };
}

function sha1Hex(parts) {
  return crypto
    .createHash('sha1')
    .update([...parts].sort().join(''))
    .digest('hex');
}

export function verifyWechatMpSignature({ token, timestamp, nonce, signature }) {
  return sha1Hex([token, timestamp, nonce]) === String(signature ?? '');
}

export function verifyWechatMpMsgSignature({ token, timestamp, nonce, echoStr, msgSignature }) {
  return sha1Hex([token, timestamp, nonce, echoStr]) === String(msgSignature ?? '');
}

function decodeWechatMpAesKey(encodingAesKey) {
  const key = Buffer.from(`${String(encodingAesKey ?? '').trim()}=`, 'base64');
  if (key.length !== 32) {
    throw new Error('invalid encoding aes key');
  }
  return key;
}

export function decryptWechatMpPayload({ encodingAesKey, appId, encrypted }) {
  const key = decodeWechatMpAesKey(encodingAesKey);
  const iv = key.subarray(0, 16);
  const decipher = crypto.createDecipheriv('aes-256-cbc', key, iv);
  decipher.setAutoPadding(false);
  const cipherBuf = Buffer.from(String(encrypted ?? ''), 'base64');
  let decoded = Buffer.concat([decipher.update(cipherBuf), decipher.final()]);
  const pad = decoded.at(-1);
  if (!Number.isInteger(pad) || pad < 1 || pad > 32) {
    throw new Error('invalid padding');
  }
  decoded = decoded.subarray(0, decoded.length - pad);
  const content = decoded.subarray(16);
  const msgLen = content.readUInt32BE(0);
  const msg = content.subarray(4, 4 + msgLen).toString('utf8');
  const receivedAppId = content.subarray(4 + msgLen).toString('utf8');
  if (receivedAppId !== String(appId ?? '')) {
    throw new Error('appid mismatch');
  }
  return msg;
}

export function verifyWechatMpUrlChallenge(query = {}, config = {}) {
  const timestamp = String(query.timestamp ?? '');
  const nonce = String(query.nonce ?? '');
  const echostr = String(query.echostr ?? '');
  const encryptType = String(query.encrypt_type ?? '').toLowerCase();

  if (encryptType === 'aes') {
    const msgSignature = String(query.msg_signature ?? '');
    if (!config?.token || !config?.encodingAesKey || !config?.appId) {
      return { ok: false, status: 503, body: 'wechat mp aes mode not configured' };
    }
    if (
      !verifyWechatMpMsgSignature({
        token: config.token,
        timestamp,
        nonce,
        echoStr: echostr,
        msgSignature,
      })
    ) {
      return { ok: false, status: 403, body: 'invalid signature' };
    }
    try {
      const plain = decryptWechatMpPayload({
        encodingAesKey: config.encodingAesKey,
        appId: config.appId,
        encrypted: echostr,
      });
      return { ok: true, status: 200, body: plain };
    } catch {
      return { ok: false, status: 403, body: 'invalid echostr' };
    }
  }

  if (
    !verifyWechatMpSignature({
      token: config?.token,
      timestamp,
      nonce,
      signature: String(query.signature ?? ''),
    })
  ) {
    return { ok: false, status: 403, body: 'invalid signature' };
  }
  return { ok: true, status: 200, body: echostr };
}

export function buildWechatTextReply({
  toUserName,
  fromUserName,
  content,
  createTime = Math.floor(Date.now() / 1000),
}) {
  return [
    '<xml>',
    `<ToUserName><![CDATA[${toUserName ?? ''}]]></ToUserName>`,
    `<FromUserName><![CDATA[${fromUserName ?? ''}]]></FromUserName>`,
    `<CreateTime>${Number(createTime) || Math.floor(Date.now() / 1000)}</CreateTime>`,
    '<MsgType><![CDATA[text]]></MsgType>',
    `<Content><![CDATA[${String(content ?? '')}]]></Content>`,
    '</xml>',
  ].join('');
}

export function createWechatMpService({
  config,
  userAuth,
  apiFetch,
  startAgentSession = null,
  sessionApiFetch = null,
  scheduleService = null,
  applySessionLlmProvider = null,
  refreshSessionSnapshot = null,
  wechatFetch = undiciFetch,
  linkExists = defaultPublicHtmlLinkExists,
  logger = console,
}) {
  if (!config?.enabled) {
    return {
      enabled: false,
    };
  }
  config = {
    ...config,
    tokenUrl: config.tokenUrl || DEFAULT_WECHAT_TOKEN_URL,
    customerServiceUrl: config.customerServiceUrl || DEFAULT_WECHAT_CUSTOMER_SERVICE_URL,
    jsapiTicketUrl: config.jsapiTicketUrl || DEFAULT_WECHAT_JSAPI_TICKET_URL,
    progressText: config.progressText ?? DEFAULT_PROGRESS_TEXT,
    progressDelayMs: Math.max(0, Number(config.progressDelayMs ?? DEFAULT_PROGRESS_DELAY_MS)),
    statusText: config.statusText || DEFAULT_STATUS_TEXT,
    mediaPublicBaseUrl: config.mediaPublicBaseUrl || config.publicBaseUrl,
    maxImageBytes: Math.max(1, Number(config.maxImageBytes ?? 10 * 1024 * 1024)),
    acceptVoice: config.acceptVoice !== false,
    acceptImage: config.acceptImage !== false,
    acceptLocation: config.acceptLocation !== false,
    acceptLink: config.acceptLink !== false,
    asrTarget: config.asrTarget || DEFAULT_ASR_TARGET,
  };

  let accessTokenCache = {
    token: null,
    expiresAt: 0,
  };
  let jsapiTicketCache = {
    ticket: null,
    expiresAt: 0,
  };

  const fetchForSession = (sessionId, pathname, init) =>
    sessionApiFetch ? sessionApiFetch(sessionId, pathname, init) : apiFetch(pathname, init);

  const buildBindUrl = () => {
    if (/^https?:\/\//i.test(config.bindPath)) return config.bindPath;
    const path = config.bindPath.startsWith('/') ? config.bindPath : `/${config.bindPath}`;
    return `${config.publicBaseUrl}${path}`;
  };

  const verifyRequest = (query = {}) =>
    verifyWechatMpSignature({
      token: config.token,
      timestamp: String(query.timestamp ?? ''),
      nonce: String(query.nonce ?? ''),
      signature: String(query.signature ?? ''),
    });

  const verifyUrlChallenge = (query = {}) => verifyWechatMpUrlChallenge(query, config);

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

  const getJsapiTicket = async () => {
    if (jsapiTicketCache.ticket && jsapiTicketCache.expiresAt > Date.now() + 60_000) {
      return jsapiTicketCache.ticket;
    }
    const accessToken = await getStableAccessToken();
    const url = new URL(config.jsapiTicketUrl);
    url.searchParams.set('access_token', accessToken);
    url.searchParams.set('type', 'jsapi');
    const payload = await readJsonResponse(
      await wechatFetch(url.toString(), {
        method: 'GET',
        headers: { Accept: 'application/json' },
      }),
    );
    if (Number(payload?.errcode ?? 0) !== 0 || !payload?.ticket) {
      throw new Error(payload?.errmsg || `获取微信 jsapi_ticket 失败 (${payload?.errcode})`);
    }
    const expiresIn = Number(payload.expires_in ?? 7200);
    jsapiTicketCache = {
      ticket: payload.ticket,
      expiresAt: Date.now() + expiresIn * 1000,
    };
    return jsapiTicketCache.ticket;
  };

  const createJsSdkSignature = async (pageUrl) => {
    const normalizedUrl = String(pageUrl ?? '').split('#')[0];
    if (!/^https?:\/\//i.test(normalizedUrl)) {
      throw new Error('签名 URL 必须是完整 http(s) 地址');
    }
    const ticket = await getJsapiTicket();
    const nonceStr = crypto.randomBytes(12).toString('hex');
    const timestamp = Math.floor(Date.now() / 1000);
    const signature = crypto
      .createHash('sha1')
      .update(
        [
          `jsapi_ticket=${ticket}`,
          `noncestr=${nonceStr}`,
          `timestamp=${timestamp}`,
          `url=${normalizedUrl}`,
        ].join('&'),
      )
      .digest('hex');
    return {
      appId: config.appId,
      timestamp,
      nonceStr,
      signature,
      url: normalizedUrl,
      jsApiList: ['startRecord', 'stopRecord', 'onVoiceRecordEnd', 'translateVoice'],
    };
  };

  const sendCustomerServiceText = async (openid, content, user = null, { verifiedHtmlUrls = [] } = {}) => {
    const formatted = formatWechatOutboundText(content, user);
    const verifiedUrlSet = new Set(
      verifiedHtmlUrls
        .map((url) => String(url ?? '').trim())
        .filter(Boolean),
    );
    const guarded = downgradePrematurePublishClaims(
      await guardMissingPublicHtmlLinks(formatted, {
        linkExists: async (url) => {
          if (verifiedUrlSet.has(String(url ?? '').trim())) return true;
          return linkExists(url);
        },
      }),
    );
    const chunks = splitWechatText(guarded);
    const accessToken = await getStableAccessToken();
    for (const chunk of chunks) {
      const payload = await readJsonResponse(
        await wechatFetch(
          `${config.customerServiceUrl}?access_token=${encodeURIComponent(accessToken)}`,
          {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
              touser: openid,
              msgtype: 'text',
              text: {
                content: chunk,
              },
            }),
          },
        ),
      );
      if (Number(payload?.errcode ?? 0) !== 0) {
        const errcode = Number(payload?.errcode ?? 0);
        const errmsg = String(payload?.errmsg ?? '').trim() || 'unknown_error';
        throw new Error(`微信客服消息发送失败 errcode=${errcode} errmsg=${errmsg}`);
      }
    }
  };

  const sendTextToUser = async (userId, content) => {
    const openid = await userAuth.getWechatOpenidForUser(userId, config.appId);
    if (!openid) {
      throw new Error('用户尚未绑定服务号，无法推送提醒');
    }
    await sendCustomerServiceText(openid, content);
  };

  const ensureSessionProvider = async (sessionId) => {
    if (!applySessionLlmProvider || !sessionId) return;
    const applied = await applySessionLlmProvider(sessionId);
    if (applied && applied.ok === false) {
      throw new Error(applied.message || '专属 Agent Provider 未配置');
    }
  };

  const transcribeWechatVoiceMedia = async (mediaId, format) => {
    if (!mediaId) return '';
    const accessToken = await getStableAccessToken();
    const downloaded = await downloadTemporaryMedia(accessToken, mediaId, { wechatFetch });
    if (!downloaded.buffer?.length) return '';

    const extension = String(format ?? '').trim().toLowerCase() || 'amr';
    const form = new FormData();
    form.append(
      'file',
      new Blob([downloaded.buffer], {
        type: guessVoiceMimeType(format, downloaded.contentType),
      }),
      `wechat-voice.${extension}`,
    );

    const response = await wechatFetch(`${config.asrTarget.replace(/\/$/, '')}/asr/oneshot`, {
      method: 'POST',
      body: form,
    });
    const { payload, text } = await readJsonBody(response);

    if (!response.ok) {
      throw new Error(sanitizeAsrMessage(payload?.message ?? text ?? `ASR HTTP ${response.status}`));
    }
    if (Number(payload?.code ?? 200) !== 200) {
      throw new Error(sanitizeAsrMessage(payload?.message ?? text ?? '识别失败，请重试'));
    }
    return String(payload?.data?.text ?? '').trim();
  };

  const ensureWechatAgentSession = async ({
    userId,
    openid,
    forceNew = false,
    userContext = null,
  }) => {
    if (forceNew) {
      await userAuth.clearWechatAgentRoute(config.appId, openid);
    }
    const workingDir = await userAuth.resolveWorkingDir(userId);
    const sessionPolicy = await userAuth.getAgentSessionPolicy(userId);
    const publishLayout = await userAuth.getUserPublishLayout(userId);
    const addressName = resolveWechatAddressName(userContext);
    const existingRoute = await userAuth.getWechatAgentRoute(config.appId, openid);
    if (existingRoute?.agentSessionId) {
      await reconcileAgentSession(
        (pathname, init) => fetchForSession(existingRoute.agentSessionId, pathname, init),
        existingRoute.agentSessionId,
        {
          workingDir,
          sessionPolicy,
          sandboxConstraints: publishLayout?.constraints ?? null,
          userContext: publishLayout
            ? {
                userId,
                displayName: addressName || publishLayout.displayName,
                username: addressName || null,
                slug: null,
              }
            : null,
          tolerateInvalidWorkingDir: true,
        },
      );
      const routeHasTools = await sessionHasRequiredTools(
        fetchForSession,
        existingRoute.agentSessionId,
        sessionPolicy,
      ).catch(() => false);
      if (routeHasTools) {
        return existingRoute.agentSessionId;
      }
      await userAuth.clearWechatAgentRoute(config.appId, openid);
    } else if (existingRoute?.status === 'disabled') {
      await userAuth.clearWechatAgentRoute(config.appId, openid);
    }

    const gate = await userAuth.canUseChat(userId);
    if (!gate.ok) {
      throw new Error(gate.message || '当前用户无法使用聊天能力');
    }
    const started = startAgentSession
      ? await startAgentSession({ userId, workingDir, sessionPolicy })
      : await readJsonResponse(
          await apiFetch('/agent/start', {
            method: 'POST',
            body: JSON.stringify({
              working_dir: workingDir,
              enable_context_memory: sessionPolicy.enableContextMemory,
              ...(sessionPolicy.extensionOverrides
                ? { extension_overrides: sessionPolicy.extensionOverrides }
                : {}),
            }),
          }),
        );
    const sessionId = started?.id;
    if (!sessionId) {
      throw new Error('公众号专属 Agent 会话创建失败');
    }

    if (!startAgentSession && typeof userAuth.registerAgentSession === 'function') {
      await userAuth.registerAgentSession(userId, sessionId);
    }
    await reconcileAgentSession(
      (pathname, init) => fetchForSession(sessionId, pathname, init),
      sessionId,
      {
      workingDir,
      sessionPolicy,
      sandboxConstraints: publishLayout?.constraints ?? null,
      userContext: publishLayout
        ? {
            userId,
            displayName: addressName || publishLayout.displayName,
            username: addressName || null,
            slug: null,
          }
        : null,
      tolerateInvalidWorkingDir: true,
      },
    );
    await userAuth.upsertWechatAgentRoute({
      userId,
      appId: config.appId,
      openid,
      agentSessionId: sessionId,
    });
    return sessionId;
  };

  const refreshWechatSessionSnapshot = async (sessionId, userId) => {
    if (!sessionId || !userId || typeof refreshSessionSnapshot !== 'function') return;
    try {
      await refreshSessionSnapshot(sessionId, userId);
    } catch (err) {
      logger.warn?.('WeChat MP snapshot refresh failed:', err);
    }
  };

  const rememberWechatUserContext = async (sessionId, user) => {
    const addressName = resolveWechatAddressName(user);
    if (!addressName) return;
    try {
      await readJsonResponse(
        await fetchForSession(sessionId, '/agent/harness_remember', {
          method: 'POST',
          body: JSON.stringify({
            sessionId,
            title: '微信服务号用户',
            content: [
              `当前服务号用户名称：${addressName}`,
              '这是通过微信 openid 在 H5 绑定库中查询到的用户名称。',
              '回复时可以自然使用该名称称呼用户，不要使用 openid 或 wx_ 开头的内部用户名。',
            ].join('\n'),
          }),
        }),
      );
      await readJsonResponse(
        await fetchForSession(sessionId, '/agent/harness_bootstrap', {
          method: 'POST',
          body: JSON.stringify({ sessionId, force: true }),
        }),
      );
    } catch (err) {
      logger.warn?.('WeChat MP user context remember failed:', err);
    }
  };

  const buildIntentMetadata = (intent) => ({
    source: 'wechat_mp',
    msgType: intent.msgType,
    originalMsgId: intent.msgId || null,
    displayText: intent.displayText || '',
    mediaPublicUrl: intent.media?.publicUrl || null,
    recognition: intent.msgType === 'voice' ? intent.agentText || null : null,
    location: intent.location || null,
    link: intent.link || null,
  });

  const persistIntentDetail = async ({ intent, userId = null, rawXmlHash = '' }) => {
    if (typeof userAuth.insertWechatMpMessageDetail !== 'function') return;
    await userAuth.insertWechatMpMessageDetail({
      appId: config.appId,
      openid: intent.openid,
      msgId: intent.msgId || null,
      userId,
      msgType: intent.msgType,
      displayText: intent.displayText || '',
      agentText: intent.agentText || '',
      mediaId: intent.media?.mediaId || null,
      mediaUrl: intent.media?.picUrl || null,
      mediaPublicUrl: intent.media?.publicUrl || null,
      mediaFormat: intent.media?.format || null,
      locationLat: intent.location?.latitude ?? null,
      locationLng: intent.location?.longitude ?? null,
      locationLabel: intent.location?.label || null,
      linkUrl: intent.link?.url || null,
      linkTitle: intent.link?.title || null,
      rawXmlHash,
      rawJson: intent.raw,
    });
  };

  const runIntentMessage = async ({ inbound, intent, user }) => {
    const resetCandidate =
      intent.msgType === 'text' || intent.msgType === 'voice' ? intent.agentText : '';
    const forceNew = isTopicResetIntent(resetCandidate);
    let sessionId = await ensureWechatAgentSession({
      userId: user.userId,
      openid: inbound.fromUserName,
      userContext: user,
      forceNew,
    });
    const publishLayout = await userAuth.getUserPublishLayout(user.userId);
    await ensureSessionProvider(sessionId);
    await rememberWechatUserContext(sessionId, user);
    let finished = false;
    let progressTimer = null;
    if (config.progressDelayMs > 0 && config.progressText) {
      progressTimer = setTimeout(() => {
        if (finished) return;
        sendCustomerServiceText(inbound.fromUserName, config.progressText, user).catch((err) => {
          logger.warn?.('WeChat MP progress reply failed:', err);
        });
      }, config.progressDelayMs);
      progressTimer.unref?.();
    }

    const requestId = crypto.randomUUID();
    const guardScheduleReply = async (replyText) => {
      if (!scheduleService || !looksLikeScheduleConfirmation(replyText)) return replyText;
      const sourceMessageId = String(intent.msgId ?? '').trim();
      if (!sourceMessageId || typeof scheduleService.listItemsBySourceMessage !== 'function') {
        return replyText;
      }
      const items = await scheduleService
        .listItemsBySourceMessage({
          userId: user.userId,
          sourceMessageId,
          limit: 5,
        })
        .catch((err) => {
          logger.warn?.('Schedule confirmation guard failed:', err);
          return [];
        });
      if (items.length > 0) return replyText;
      return [
        '我刚才没有确认到待办/提醒已经写入系统，所以这次不能算设置成功。',
        '请再发一次完整安排，比如“明天早上 6 点跑步，5 点半提醒我”。我会在工具写入成功后再确认。',
      ].join('\n');
    };
    try {
      const requestStartedAt = Date.now();
      const reply = await executeSessionReply(
        (pathname, init) => fetchForSession(sessionId, pathname, init),
        sessionId,
        requestId,
        buildWechatAgentPrompt(intent),
        buildIntentMetadata(intent),
      );
      const workingDir = publishLayout?.publishDir ?? (await userAuth.resolveWorkingDir(user.userId));
      const expectedArtifacts = collectExpectedHtmlArtifacts(intent, {
        workingDir,
        publicBaseUrl: config.publicBaseUrl,
      });
      const recentArtifacts = collectRecentPublishedHtmlArtifacts(intent, {
        workingDir,
        publicBaseUrl: config.publicBaseUrl,
        sinceMs: requestStartedAt,
      });
      const hasValidLinkInReply = await hasAnyValidPublishedHtmlLink(reply?.text, linkExists);
      const shouldFallbackFromReply =
        !hasAnyUrl(reply?.text) || (hasAnyPublicHtmlLink(reply?.text) && !hasValidLinkInReply);
      const fallbackArtifact =
        expectedArtifacts.length === 0 &&
        recentArtifacts.length === 0 &&
        shouldFallbackFromReply &&
        collectPublishedHtmlArtifacts(reply, { workingDir, publicBaseUrl: config.publicBaseUrl }).length === 0
          ? createFallbackPublishedHtmlArtifact(intent, reply, {
              workingDir,
              publicBaseUrl: config.publicBaseUrl,
            })
          : null;
      if (
        isMissingRequiredPublishSkill(reply, intent) ||
        isSuspiciousBareCompletionReply(reply, intent) ||
        (expectedArtifacts.length === 0 &&
          recentArtifacts.length === 0 &&
          !fallbackArtifact &&
          (await isSuspiciousHtmlPublishClaimReply(reply, intent, { linkExists })))
      ) {
        throw new Error('stale_session_poisoned_completion');
      }
      if (reply.tokenState) {
        await userAuth.billSessionUsage(user.userId, sessionId, reply.tokenState, requestId);
      }
      const publishedArtifacts = collectPublishedHtmlArtifacts(reply, {
        workingDir,
        publicBaseUrl: config.publicBaseUrl,
      });
      if (fallbackArtifact) publishedArtifacts.push(fallbackArtifact);
      const recentPublishedArtifacts = publishedArtifacts.length > 0 ? [] : recentArtifacts;
      const fallbackArtifacts = publishedArtifacts.length > 0
        ? []
        : (expectedArtifacts.length > 0 ? expectedArtifacts : recentPublishedArtifacts);
      const verifiedArtifacts = publishedArtifacts.length > 0 ? publishedArtifacts : fallbackArtifacts;
      const finalizedReply = await maybeAttachPublishedHtmlLink(reply, {
        workingDir,
        publicBaseUrl: config.publicBaseUrl,
        artifacts: verifiedArtifacts,
      });
      const outboundReply = rewriteFallbackPageSuccessText(finalizedReply, fallbackArtifact);
      await refreshWechatSessionSnapshot(sessionId, user.userId);
      await sendCustomerServiceText(inbound.fromUserName, await guardScheduleReply(outboundReply), user, {
        verifiedHtmlUrls: verifiedArtifacts.map((artifact) => artifact.url),
      });
      return { sessionId };
    } catch (err) {
      const message = err instanceof Error ? err.message : String(err);
      const mayBeStaleSession =
        /403|404|not found|无权访问|session|stale_session_poisoned_completion/i.test(message) && sessionId;
      if (mayBeStaleSession) {
        sessionId = await ensureWechatAgentSession({
          userId: user.userId,
          openid: inbound.fromUserName,
          forceNew: true,
          userContext: user,
        });
        await ensureSessionProvider(sessionId);
        await rememberWechatUserContext(sessionId, user);
        const retryId = crypto.randomUUID();
        const retryStartedAt = Date.now();
        const reply = await executeSessionReply(
          (pathname, init) => fetchForSession(sessionId, pathname, init),
          sessionId,
          retryId,
          buildWechatAgentPrompt(intent),
          buildIntentMetadata(intent),
        );
        const workingDir = publishLayout?.publishDir ?? (await userAuth.resolveWorkingDir(user.userId));
        const expectedArtifacts = collectExpectedHtmlArtifacts(intent, {
          workingDir,
          publicBaseUrl: config.publicBaseUrl,
        });
        const recentArtifacts = collectRecentPublishedHtmlArtifacts(intent, {
          workingDir,
          publicBaseUrl: config.publicBaseUrl,
          sinceMs: retryStartedAt,
        });
        const hasValidLinkInReply = await hasAnyValidPublishedHtmlLink(reply?.text, linkExists);
        const shouldFallbackFromReply =
          !hasAnyUrl(reply?.text) || (hasAnyPublicHtmlLink(reply?.text) && !hasValidLinkInReply);
        const fallbackArtifact =
          expectedArtifacts.length === 0 &&
          recentArtifacts.length === 0 &&
          shouldFallbackFromReply &&
          collectPublishedHtmlArtifacts(reply, { workingDir, publicBaseUrl: config.publicBaseUrl }).length === 0
            ? createFallbackPublishedHtmlArtifact(intent, reply, {
                workingDir,
                publicBaseUrl: config.publicBaseUrl,
              })
            : null;
        if (
          isMissingRequiredPublishSkill(reply, intent) ||
          isSuspiciousBareCompletionReply(reply, intent) ||
          (expectedArtifacts.length === 0 &&
            recentArtifacts.length === 0 &&
            !fallbackArtifact &&
            (await isSuspiciousHtmlPublishClaimReply(reply, intent, { linkExists })))
        ) {
          throw new Error('本轮命中了被旧指令污染的专属会话，请稍后重试');
        }
        if (reply.tokenState) {
          await userAuth.billSessionUsage(user.userId, sessionId, reply.tokenState, retryId);
        }
        const publishedArtifacts = collectPublishedHtmlArtifacts(reply, {
          workingDir,
          publicBaseUrl: config.publicBaseUrl,
        });
        if (fallbackArtifact) publishedArtifacts.push(fallbackArtifact);
        const recentPublishedArtifacts = publishedArtifacts.length > 0 ? [] : recentArtifacts;
        const fallbackArtifacts = publishedArtifacts.length > 0
          ? []
          : (expectedArtifacts.length > 0 ? expectedArtifacts : recentPublishedArtifacts);
        const verifiedArtifacts = publishedArtifacts.length > 0 ? publishedArtifacts : fallbackArtifacts;
        const finalizedReply = await maybeAttachPublishedHtmlLink(reply, {
          workingDir,
          publicBaseUrl: config.publicBaseUrl,
          artifacts: verifiedArtifacts,
        });
        const outboundReply = rewriteFallbackPageSuccessText(finalizedReply, fallbackArtifact);
        await refreshWechatSessionSnapshot(sessionId, user.userId);
        await sendCustomerServiceText(inbound.fromUserName, await guardScheduleReply(outboundReply), user, {
          verifiedHtmlUrls: verifiedArtifacts.map((artifact) => artifact.url),
        });
        return { sessionId };
      }
      throw err;
    } finally {
      finished = true;
      if (progressTimer) clearTimeout(progressTimer);
    }
  };

  const handleScheduleIntent = async ({ intent, user }) => {
    if (!scheduleService) return null;
    const scheduleIntent = parseScheduleIntent(intent.agentText);
    if (!isScheduleIntent(scheduleIntent)) return null;

    if (scheduleIntent.action === 'create_todo') {
      if (scheduleIntent.needsClarification?.includes('todo_title')) {
        return '可以。你想让我记哪一条待办？例如“帮我记一下 跟段吃饭”。';
      }
      const item = await scheduleService.createItem({
        userId: user.userId,
        kind: 'task',
        title: scheduleIntent.title,
        timezone: process.env.H5_DEFAULT_TIMEZONE || 'Asia/Shanghai',
        sourceChannel: 'wechat',
        sourceMessageId: intent.msgId || null,
        sourceText: intent.agentText,
        metadata: {
          source: 'wechat_mp',
        },
      });
      return `已记录到待办列表：${item.title}，未设置提醒。`;
    }

    if (scheduleIntent.action === 'create_daily_todo_digest') {
      if (scheduleIntent.needsClarification?.includes('digest_time')) {
        return '可以。你想每天几点收到当天待办记录？比如“每天早上 7 点发给我”。';
      }
      const subscription = await scheduleService.createDailyTodoDigest({
        userId: user.userId,
        hour: scheduleIntent.hour,
        minute: scheduleIntent.minute,
        timezone: process.env.H5_DEFAULT_TIMEZONE || 'Asia/Shanghai',
        channel: 'wechat',
        sourceChannel: 'wechat',
        sourceMessageId: intent.msgId || null,
        sourceText: intent.agentText,
      });
      const minuteText = subscription.minute === 0 ? '' : `${String(subscription.minute).padStart(2, '0')}分`;
      return `已设置：我会每天早上 ${subscription.hour}点${minuteText} 通过服务号把当天待办记录发给你。`;
    }

    if (scheduleIntent.action === 'create_balance_alert') {
      if (scheduleIntent.needsClarification?.includes('threshold')) {
        return '可以。你想在余额低于多少时提醒我？例如“余额低于 20 元提醒我”。';
      }
      const subscription = await scheduleService.createBalanceLowAlert({
        userId: user.userId,
        thresholdCents: scheduleIntent.thresholdCents,
        channel: 'wechat',
        sourceChannel: 'wechat',
        sourceMessageId: intent.msgId || null,
        sourceText: intent.agentText,
      });
      return `已设置：当余额低于 ${(subscription.thresholdCents / 100).toFixed(2)} 元时，我会通过服务号提醒你。`;
    }

    if (scheduleIntent.action === 'query_schedule') {
      const text = await scheduleService.buildTodoDigestText({
        userId: user.userId,
        timezone: process.env.H5_DEFAULT_TIMEZONE || 'Asia/Shanghai',
      });
      return text;
    }

    return null;
  };

  const handleInboundMessage = async (bodyText, query = {}) => {
    if (!verifyRequest(query)) {
      return { ok: false, status: 403, body: 'invalid signature' };
    }
    const inbound = parseWechatMessage(String(bodyText ?? ''));
    const rawXmlHash = crypto.createHash('sha1').update(inbound.rawXml || '').digest('hex');
    const intent = normalizeWechatInboundIntent(inbound);
    intent.appId = config.appId;
    if (!inbound.fromUserName || !inbound.toUserName || !inbound.msgType) {
      return { ok: false, status: 400, body: 'invalid xml' };
    }
    if (String(query.encrypt_type ?? '').toLowerCase() === 'aes' || inbound.encrypt) {
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: '当前公众号回调需使用明文模式接入，请联系管理员切换后再试。',
        }),
      };
    }

    if (inbound.msgType === 'event' && inbound.event === 'location') {
      await persistIntentDetail({ intent, rawXmlHash });
      return successResponse();
    }

    if (inbound.msgType === 'event' && inbound.event === 'subscribe') {
      await persistIntentDetail({ intent, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: `${config.unboundTextPrefix}\n${buildBindUrl()}`,
        }),
      };
    }

    if (inbound.msgType === 'event') {
      await persistIntentDetail({ intent, rawXmlHash });
      return successResponse();
    }

    const supportedByConfig =
      (intent.msgType === 'voice' && config.acceptVoice) ||
      (intent.msgType === 'image' && config.acceptImage) ||
      (intent.msgType === 'location' && config.acceptLocation) ||
      (intent.msgType === 'link' && config.acceptLink) ||
      intent.msgType === 'text' ||
      intent.msgType === 'video' ||
      intent.msgType === 'shortvideo';

    if (!supportedByConfig) {
      await persistIntentDetail({ intent, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: config.unsupportedText,
        }),
      };
    }

    const boundUser = await userAuth.findWechatUserByOpenid(config.appId, inbound.fromUserName);
    if (!boundUser) {
      await persistIntentDetail({ intent, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: `${config.unboundTextPrefix}\n${buildBindUrl()}`,
        }),
      };
    }
    if (boundUser.status === 'disabled') {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: '当前账号不可用，请联系管理员处理。',
        }),
      };
    }

    if (intent.msgType === 'voice' && !intent.agentText.trim() && intent.media?.mediaId) {
      try {
        const fallbackText = await transcribeWechatVoiceMedia(intent.media.mediaId, intent.media.format);
        if (fallbackText) {
          intent.agentText = fallbackText;
          intent.displayText = `语音：${fallbackText}`;
        }
      } catch (err) {
        logger.warn?.('WeChat MP voice ASR fallback failed:', err);
      }
    }

    if (intent.msgType === 'text' && !intent.agentText.trim()) {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: config.unsupportedText,
        }),
      };
    }

    if (intent.msgType === 'voice' && !intent.agentText.trim()) {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: '未识别到语音文字，请再说一次或输入文字。',
        }),
      };
    }

    if (intent.msgType === 'image') {
      try {
        const accessToken = await getStableAccessToken();
        const persisted = await persistWechatImage(
          {
            userId: boundUser.userId,
            appId: config.appId,
            openid: inbound.fromUserName,
            msgId: inbound.msgId,
            mediaId: inbound.mediaId,
            picUrl: inbound.picUrl,
            publicBaseUrl: config.mediaPublicBaseUrl,
            maxImageBytes: config.maxImageBytes,
          },
          {
            wechatFetch,
            accessToken,
          },
        );
        intent.media = {
          ...intent.media,
          mediaId: inbound.mediaId || intent.media?.mediaId || '',
          picUrl: inbound.picUrl || intent.media?.picUrl || '',
          publicUrl: persisted.publicUrl,
          format: persisted.contentType,
          source: persisted.source,
        };
        intent.agentText = `[图片1]: ${persisted.publicUrl}`;
      } catch (error) {
        await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
        return {
          ok: true,
          status: 200,
          contentType: 'application/xml; charset=utf-8',
          body: buildWechatTextReply({
            toUserName: inbound.fromUserName,
            fromUserName: inbound.toUserName,
            content: '图片处理失败，请稍后重试或直接发送文字说明。',
          }),
        };
      }
    }

    if (
      intent.msgType === 'location' &&
      (intent.location?.latitude == null || intent.location?.longitude == null)
    ) {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: '这次位置字段不完整，请重新发送位置或直接输入地点。',
        }),
      };
    }

    if (intent.msgType === 'link' && !intent.link?.url) {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: '这次没有拿到完整链接，请重新发送一次。',
        }),
      };
    }

    if (intent.msgType === 'video' || intent.msgType === 'shortvideo') {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: '已收到视频，当前先支持文本、语音、图片、定位和链接。',
        }),
      };
    }

    if (intent.msgType === 'text' && isQuestionStatusProbe(intent.agentText)) {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: buildStatusText(boundUser, config.statusText),
        }),
      };
    }

    if (intent.msgType === 'text' && isSimpleGreeting(intent.agentText)) {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: buildGreetingText(boundUser),
        }),
      };
    }

    if ((intent.msgType === 'text' || intent.msgType === 'voice') && isConnectivityTest(intent.agentText)) {
      await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: buildConnectivityTestReply(boundUser),
        }),
      };
    }

    if (inbound.msgId && typeof userAuth.recordWechatMpMessage === 'function') {
      const recorded = await userAuth.recordWechatMpMessage({
        appId: config.appId,
        openid: inbound.fromUserName,
        msgId: inbound.msgId,
      });
      if (!recorded?.inserted) {
        return {
          ok: true,
          status: 200,
          contentType: 'application/xml; charset=utf-8',
          body: buildWechatTextReply({
            toUserName: inbound.fromUserName,
            fromUserName: inbound.toUserName,
            content: buildStatusText(boundUser, config.statusText),
          }),
        };
      }
    }

    await persistIntentDetail({ intent, userId: boundUser.userId, rawXmlHash });

    const scheduleReply =
      intent.msgType === 'text' || intent.msgType === 'voice'
        ? await handleScheduleIntent({ intent, user: boundUser })
        : null;
    if (scheduleReply) {
      if (inbound.msgId && typeof userAuth.finishWechatMpMessage === 'function') {
        await userAuth.finishWechatMpMessage({
          appId: config.appId,
          openid: inbound.fromUserName,
          msgId: inbound.msgId,
          status: 'done',
          agentSessionId: null,
        });
      }
      return {
        ok: true,
        status: 200,
        contentType: 'application/xml; charset=utf-8',
        body: buildWechatTextReply({
          toUserName: inbound.fromUserName,
          fromUserName: inbound.toUserName,
          content: scheduleReply,
        }),
      };
    }

    const task = runIntentMessage({
      inbound,
      intent,
      user: boundUser,
    })
      .then(async ({ sessionId } = {}) => {
        if (inbound.msgId && typeof userAuth.finishWechatMpMessage === 'function') {
          await userAuth.finishWechatMpMessage({
            appId: config.appId,
            openid: inbound.fromUserName,
            msgId: inbound.msgId,
            status: 'done',
            agentSessionId: sessionId,
          });
        }
      })
      .catch(async (err) => {
        if (inbound.msgId && typeof userAuth.finishWechatMpMessage === 'function') {
          await userAuth.finishWechatMpMessage({
            appId: config.appId,
            openid: inbound.fromUserName,
            msgId: inbound.msgId,
            status: 'failed',
          }).catch(() => {});
        }
        logger.error?.('WeChat MP background reply failed:', err);
        return sendCustomerServiceText(
          inbound.fromUserName,
          `这次转发到专属 Agent 失败了：${err instanceof Error ? err.message : String(err)}`,
          boundUser,
        ).catch(() => {});
      });

    return {
      ok: true,
      status: 200,
      contentType: 'application/xml; charset=utf-8',
      body: buildWechatTextReply({
        toUserName: inbound.fromUserName,
        fromUserName: inbound.toUserName,
        content: buildAckText({
          intent,
          nickname: resolveWechatAddressName(boundUser),
          config,
          fallbackText: config.ackText,
        }),
      }),
      task,
    };
  };

  const getRouteStatusForUser = async (userId) => {
    const openid = await userAuth.getWechatOpenidForUser(userId, config.appId);
    if (!openid) {
      return {
        enabled: true,
        bound: false,
        appId: config.appId,
        openid: null,
        agentSessionId: null,
        routeStatus: null,
        updatedAt: null,
      };
    }
    const route = await userAuth.getWechatAgentRoute(config.appId, openid);
    return {
      enabled: true,
      bound: true,
      appId: config.appId,
      openid,
      agentSessionId: route?.agentSessionId ?? null,
      routeStatus: route?.status ?? null,
      updatedAt: route?.updatedAt ?? null,
    };
  };

  const recreateRouteForUser = async (userId) => {
    const openid = await userAuth.getWechatOpenidForUser(userId, config.appId);
    if (!openid) {
      return {
        ok: false,
        message: '当前账号尚未绑定该服务号',
      };
    }
    const sessionId = await ensureWechatAgentSession({
      userId,
      openid,
      forceNew: true,
    });
    const route = await userAuth.getWechatAgentRoute(config.appId, openid);
    return {
      ok: true,
      route: {
        enabled: true,
        bound: true,
        appId: config.appId,
        openid,
        agentSessionId: sessionId,
        routeStatus: route?.status ?? 'active',
        updatedAt: route?.updatedAt ?? null,
      },
    };
  };

  return {
    enabled: true,
    verifyRequest,
    verifyUrlChallenge,
    handleInboundMessage,
    getRouteStatusForUser,
    recreateRouteForUser,
    createJsSdkSignature,
    sendTextToUser,
  };
}