#!/usr/bin/env node
/**
 * 一堂创业课文档采集工具
 *
 * 用法：
 *   node auto-scrape.mjs <URL> [输出文件名]
 *
 * 示例：
 *   node auto-scrape.mjs https://yitang.top/fs-doc/abc123/docId
 *   node auto-scrape.mjs https://yitanger.feishu.cn/wiki/R9NywV2i9i...
 *
 * Cookie 持久化：首次登录后自动保存，之后无需重复扫码。
 */
import { chromium } from 'playwright';
import CryptoJS from 'crypto-js';
import { writeFileSync, readFileSync, existsSync } from 'fs';
import { resolve, basename, dirname } from 'path';
import { execSync } from 'child_process';
import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// ── 打包模式：自动检测 Playwright 浏览器路径 ────────────────────────────────────
// 当通过 pkg 打包后，process.execPath 指向可执行文件本身
// 浏览器目录应位于可执行文件旁边的 browsers/ 目录中
const execDir = dirname(process.execPath);
const bundledBrowsers = resolve(execDir, 'browsers');
if (existsSync(bundledBrowsers)) {
  process.env.PLAYWRIGHT_BROWSERS_PATH = bundledBrowsers;
}

// ── CLI 参数解析 ──────────────────────────────────────────────────────────────
const args = process.argv.slice(2);
if (!args[0] || args[0] === '--help' || args[0] === '-h') {
  console.log(`
用法：node auto-scrape.mjs <URL> [输出文件名]

  URL         yitang.top/fs-doc/... 或 *.feishu.cn/wiki/... 文档链接（必填）
  输出文件名  保存路径，默认为文档标题.md

示例：
  node auto-scrape.mjs https://yitang.top/fs-doc/abc/docId
  node auto-scrape.mjs https://yitanger.feishu.cn/wiki/R9NywV2i9izjuqkPd63cWuafn4g
  node auto-scrape.mjs https://yitang.top/fs-doc/abc/docId 课程笔记.md
`);
  process.exit(0);
}

const TARGET_URL  = args[0].trim();
const customOutput = args[1];
const COOKIE_FILE  = resolve('cookies.json');

// ── 判断 URL 类型 ──────────────────────────────────────────────────────────────
const isFeishuWiki = /feishu\.cn\/wiki\//.test(TARGET_URL);
const isFeishuDocx = /feishu\.cn\/docx\//.test(TARGET_URL);
const isYitang = TARGET_URL.includes('yitang.top/fs-doc/');

if (!isFeishuWiki && !isFeishuDocx && !isYitang) {
  console.error('❌ URL 格式不正确，支持 yitang.top/fs-doc/<acl>/<docId> 或 *.feishu.cn/wiki/<token>');
  process.exit(1);
}

// ── Feishu Wiki：直接调用 fetch-feishu-wiki.mjs ────────────────────────────────
if (isFeishuWiki) {
  console.log('🔄 检测到飞书 Wiki 文档，使用 lark-cli API 获取...\n');
  try {
    const fetchScript = resolve(__dirname, 'fetch-feishu-wiki.mjs');
    execSync(`node "${fetchScript}" "${TARGET_URL}"`, {
      stdio: 'inherit',
      encoding: 'utf-8'
    });
    process.exit(0);
  } catch (error) {
    console.error('❌ 调用 fetch-feishu-wiki.mjs 失败');
    process.exit(1);
  }
}

// yitang 专用字段
let ACL, DOC_ID, LOGIN_URL;
if (isYitang) {
  const match = TARGET_URL.match(/\/fs-doc\/([^/]+)\/([^/?#]+)/);
  if (!match) {
    console.error('❌ yitang URL 格式不正确，应为 https://yitang.top/fs-doc/<acl>/<docId>');
    process.exit(1);
  }
  ACL      = match[1];
  DOC_ID   = match[2];
  LOGIN_URL = `https://yitang.top/login?after_login=%2Ffs-doc%2F${ACL}%2F${DOC_ID}`;
}

// ── Feishu block → Markdown ──────────────────────────────────────────────────
const T = { PAGE:1, TEXT:2, H1:3, H2:4, H3:5, H4:6, H5:7, H6:8,
            ORDERED:13, BULLET:12, TODO:17, CODE:14, QUOTE:15, DIVIDER:22,
            IMAGE:27, TABLE:31, TABLE_CELL:32, QUOTE_CONTAINER:34,
            GRID:24, GRID_COL:25 };

function textRuns(elements) {
  if (!Array.isArray(elements)) return '';
  return elements.map(el => {
    const run = el.text_run;
    if (!run) return '';
    let t = run.content || '';
    const s = run.text_element_style || {};
    if (s.bold)          t = `**${t}**`;
    if (s.italic)        t = `*${t}*`;
    if (s.strikethrough) t = `~~${t}~~`;
    if (s.inline_code)   t = `\`${t}\``;
    if (s.link?.url)     t = `[${t}](${s.link.url})`;
    return t;
  }).join('');
}

function blockToMd(block, depth = 0) {
  if (!block) return '';
  const attr   = block.blockAttr || {};
  const indent = '  '.repeat(Math.max(0, depth - 1));
  switch (block.type) {
    case T.PAGE:     return `# ${textRuns(attr.page?.elements)}\n\n`;
    case T.H1:       return `# ${textRuns(attr.heading1?.elements)}\n\n`;
    case T.H2:       return `## ${textRuns(attr.heading2?.elements)}\n\n`;
    case T.H3:       return `### ${textRuns(attr.heading3?.elements)}\n\n`;
    case T.H4:       return `#### ${textRuns(attr.heading4?.elements)}\n\n`;
    case T.H5:       return `##### ${textRuns(attr.heading5?.elements)}\n\n`;
    case T.H6:       return `###### ${textRuns(attr.heading6?.elements)}\n\n`;
    case T.TEXT: {
      const txt = textRuns(attr.text?.elements);
      return txt ? `${txt}\n\n` : '\n';
    }
    case T.BULLET:   return `${indent}- ${textRuns(attr.bullet?.elements)}\n`;
    case T.ORDERED:  return `${indent}1. ${textRuns(attr.ordered?.elements)}\n`;
    case T.TODO: {
      const done = attr.todo?.style?.done ? '[x]' : '[ ]';
      return `${indent}- ${done} ${textRuns(attr.todo?.elements)}\n`;
    }
    case T.QUOTE:    return `> ${textRuns(attr.quote?.elements)}\n\n`;
    case T.CODE: {
      const language = attr.code?.style?.language;
      const lang = typeof language === 'string' ? language.toLowerCase().replace('plain text','') : '';
      const code = (attr.code?.elements || []).map(e => e.text_run?.content || '').join('');
      return `\`\`\`${lang}\n${code}\n\`\`\``;
    }
    case T.DIVIDER:  return `---\n\n`;
    case T.IMAGE: {
      const caption = (attr.textArea || []).map(a => a.text).filter(Boolean).join(' ');
      const url = attr.cdnUrl || attr.image?.token || '';
      return `![${caption}](${url})\n\n`;
    }
    case T.QUOTE_CONTAINER: return '';
    case T.GRID:            return '';
    case T.GRID_COL:        return '';
    case T.TABLE:           return '\n';
    case T.TABLE_CELL: {
      const text = (block.childrens || []).map(c => {
        const a = c.blockAttr || {};
        return textRuns(a.text?.elements || a.heading1?.elements || a.heading2?.elements || []);
      }).filter(Boolean).join(' | ');
      return text ? `| ${text} ` : '';
    }
    default: return '';
  }
}

function blocksToMarkdown(rootBlock) {
  const lines = [];
  function walk(block, depth) {
    if (!block) return;
    lines.push(blockToMd(block, depth));
    if (block.type !== T.TABLE_CELL && block.childrens) {
      block.childrens.forEach(c => walk(c, depth + 1));
    }
    if (block.type === T.TABLE) lines.push('\n');
  }
  walk(rootBlock, 0);
  return lines.join('').replace(/\n{3,}/g, '\n\n').trim();
}

// ── Feishu 原生 docx block (block_type schema) → Markdown ────────────────────
// 飞书 Open Platform block_type: 1=page 2=text 3-8=h1-h6 12=bullet 13=ordered
//   14=code 15=quote 16=todo 21=divider 26=image 30=table 31=table_cell

const FT_HEADING = { 3: 1, 4: 2, 5: 3, 6: 4, 7: 5, 8: 6 };
const FT_CODE_LANG = {
  1: '', 7: 'bash', 9: 'cpp', 10: 'c', 12: 'css', 22: 'go',
  28: 'json', 29: 'java', 30: 'javascript', 49: 'python',
  52: 'ruby', 53: 'rust', 56: 'sql', 60: 'shell', 63: 'typescript',
};

function ftTextElements(elements = []) {
  return elements.map(el => {
    if (el.text_run) {
      const content = el.text_run.content || '';
      const s = el.text_run.text_element_style || {};
      let t = content;
      if (s.inline_code) return `\`${t}\``;
      if (s.bold)          t = `**${t}**`;
      if (s.italic)        t = `*${t}*`;
      if (s.strikethrough) t = `~~${t}~~`;
      if (s.link?.url)     t = `[${t}](${decodeURIComponent(s.link.url)})`;
      return t;
    }
    if (el.mention_doc) {
      const { url = '', title = '' } = el.mention_doc;
      return url ? `[${title || url}](${url})` : title;
    }
    if (el.mention_user) return `@${el.mention_user.user_id || 'user'}`;
    return '';
  }).join('');
}

function ftBlockToMd(block, index, depth, orderedNum = 1) {
  const t = block.block_type;
  const indent = '  '.repeat(depth);
  if (t === 1) return ftRenderChildren(block.children || [], index, depth);
  if (t === 2) {
    const text = ftTextElements(block.text?.elements);
    return text ? text + '\n' : '\n';
  }
  if (FT_HEADING[t] !== undefined) {
    return `${'#'.repeat(FT_HEADING[t])} ${ftTextElements(block.text?.elements)}\n\n`;
  }
  if (t === 12) {
    const nested = block.children?.length ? '\n' + ftRenderChildren(block.children, index, depth + 1) : '';
    return `${indent}- ${ftTextElements(block.text?.elements)}${nested}\n`;
  }
  if (t === 13) {
    const nested = block.children?.length ? '\n' + ftRenderChildren(block.children, index, depth + 1) : '';
    return `${indent}${orderedNum}. ${ftTextElements(block.text?.elements)}${nested}\n`;
  }
  if (t === 14) {
    const langId = block.code?.style?.language ?? 1;
    const code = ftTextElements(block.code?.elements || []);
    return `\`\`\`${FT_CODE_LANG[langId] ?? ''}\n${code}\n\`\`\`\n`;
  }
  if (t === 15) return `> ${ftTextElements(block.text?.elements)}\n\n`;
  if (t === 16) {
    const done = block.text?.style?.done ? '[x]' : '[ ]';
    return `- ${done} ${ftTextElements(block.text?.elements)}\n`;
  }
  if (t === 21) return '\n---\n\n';
  if (t === 26) {
    const token = block.image?.token || '';
    const src = token
      ? `https://internal-api-drive-stream.feishu.cn/space/api/box/stream/download/all/${token}`
      : '';
    return `![${token}](${src})\n\n`;
  }
  if (t === 30) return ftRenderTable(block, index) + '\n';
  if (t === 31) return null;
  const fallback = ftTextElements(block.text?.elements || []);
  return fallback ? fallback + '\n' : null;
}

function ftRenderChildren(childIds, index, depth) {
  const lines = [];
  let n = 1;
  for (const id of childIds) {
    const block = index.get(id);
    if (!block) continue;
    if (block.block_type === 13) {
      const line = ftBlockToMd(block, index, depth, n++);
      if (line != null) lines.push(line);
    } else {
      n = 1;
      const line = ftBlockToMd(block, index, depth);
      if (line != null) lines.push(line);
    }
  }
  return lines.join('');
}

function ftRenderTable(block, index) {
  const { row_size = 0, column_size = 0 } = block.table?.property || {};
  const cellIds = block.table?.cells || [];
  if (!row_size || !column_size) return '';
  const rows = Array.from({ length: row_size }, () => Array(column_size).fill(''));
  for (let r = 0; r < row_size; r++) {
    for (let c = 0; c < column_size; c++) {
      const cell = index.get(cellIds[r * column_size + c]);
      if (!cell) continue;
      rows[r][c] = ftRenderChildren(cell.children || [], index, 0).replace(/\n+/g, ' ').trim();
    }
  }
  const out = ['| ' + rows[0].join(' | ') + ' |', '| ' + Array(column_size).fill('---').join(' | ') + ' |'];
  for (let r = 1; r < row_size; r++) out.push('| ' + rows[r].join(' | ') + ' |');
  return out.join('\n');
}

function feishuBlocksToMd(blocks) {
  const index = new Map();
  for (const b of blocks) if (b.block_id) index.set(b.block_id, b);
  const root = blocks.find(b => b.block_type === 1) || blocks[0];
  if (!root) return blocks.map(b => ftBlockToMd(b, index, 0)).filter(Boolean).join('\n');
  return ftRenderChildren(root.children || [], index, 0).replace(/\n{3,}/g, '\n\n').trim();
}

// 从 API 响应 JSON 中递归查找 block 数组（block_type schema）
function findFeishuBlocks(obj, depth = 0) {
  if (depth > 5 || !obj || typeof obj !== 'object') return [];
  if (obj.block_id && typeof obj.block_type === 'number') return [obj];
  if (Array.isArray(obj)) {
    const flat = [];
    for (const item of obj) flat.push(...findFeishuBlocks(item, depth + 1));
    return flat;
  }
  for (const c of [obj.items, obj.blocks, obj.data?.items, obj.data?.blocks,
                    obj.data?.document?.blocks, obj.result?.data?.items]) {
    if (c) { const found = findFeishuBlocks(c, depth + 1); if (found.length) return found; }
  }
  return [];
}

// 从 wiki node API 响应中找出真实 docx token 和标题
function findWikiObjToken(obj, wikiToken, depth = 0) {
  if (depth > 6 || !obj || typeof obj !== 'object') return null;
  if (obj.obj_token && (obj.node_token === wikiToken || obj.wiki_token === wikiToken || depth > 0)) return obj;
  if (obj.obj_token && obj.title) return obj;
  if (Array.isArray(obj)) {
    for (const item of obj) { const f = findWikiObjToken(item, wikiToken, depth + 1); if (f) return f; }
    return null;
  }
  for (const key of Object.keys(obj)) {
    const f = findWikiObjToken(obj[key], wikiToken, depth + 1);
    if (f) return f;
  }
  return null;
}

// ── Main ─────────────────────────────────────────────────────────────────────
console.log('╔════════════════════════════════════════════╗');
console.log('║  一堂文档采集工具                          ║');
console.log('╚════════════════════════════════════════════╝');
console.log(`📎 URL:    ${TARGET_URL}`);
if (isYitang) {
  console.log(`📄 ACL:    ${ACL}`);
  console.log(`🔖 DocID:  ${DOC_ID}`);
} else {
  const ftToken = TARGET_URL.match(/\/(wiki|docx)\/([A-Za-z0-9_-]+)/);
  console.log(`🔖 Type:   feishu ${ftToken?.[1] || ''}  Token: ${ftToken?.[2] || ''}`);
}
console.log('');

const hasSavedCookies = existsSync(COOKIE_FILE);
const browser = await chromium.launch({ headless: false, args: ['--window-size=820,720'] });
const context  = await browser.newContext();

if (hasSavedCookies) {
  const saved = JSON.parse(readFileSync(COOKIE_FILE, 'utf-8'));
  await context.addCookies(saved);
  console.log(`✅ 已加载保存的 Cookie（${saved.length} 条），跳过扫码登录`);
} else {
  console.log('首次运行，请在弹出的浏览器中完成登录...');
}

const page = await context.newPage();

let apiResponseText = null;
const feishuApiResponses = [];

// 飞书原生 docx/wiki API 匹配模式
const FEISHU_DOC_RE = [
  /\/docx\/v\d+\/documents\/[A-Za-z0-9]+\/blocks/,
  /\/space\/api\/docs\/v\d+\/raw_api/,
  /apiName=DocxV\d+Document/i,
];
const FEISHU_WIKI_RE = [
  /\/wiki\/v\d+\/spaces?\/[^/]+\/nodes?/,
  /\/wiki\/api\/.*\/(get_?node|node_meta|node_info)/,
  /\/space\/api\/wiki\/v\d+\/.*node/,
  /apiName=WikiV\d+/i,
];

page.on('response', async (resp) => {
  const u = resp.url();

  if (isFeishu) {
    const isDoc  = FEISHU_DOC_RE.some(p => p.test(u));
    const isWiki = FEISHU_WIKI_RE.some(p => p.test(u));
    // 跳过非 JSON、静态资源、已知无用的请求
    const ct = resp.headers()['content-type'] || '';
    if (!ct.includes('json') && !ct.includes('text/plain')) return;
    if (resp.status() < 200 || resp.status() >= 300) return;

    try {
      const text = await resp.text();
      let json; try { json = JSON.parse(text); } catch { return; }

      if (isDoc || isWiki) {
        console.log(`\n🎯 捕获飞书 API (${isWiki ? 'wiki' : 'doc'})：${u.split('?')[0]}  (${text.length} 字节)`);
        feishuApiResponses.push({ url: u, data: json, kind: isWiki ? 'wiki' : 'doc' });
        return;
      }

      // 兜底：扫描任意 JSON 响应中是否含有 block 数据
      const blocks = findFeishuBlocks(json);
      if (blocks.length > 0) {
        console.log(`\n📦 兜底捕获 block 数据：${u.split('?')[0]}  (${blocks.length} 个 block)`);
        feishuApiResponses.push({ url: u, data: json, kind: 'doc' });
      }
    } catch {}
    return;
  }

  // yitang 路径
  if (u.includes('get-doc-blocks') || u.includes('get-blocks')) {
    try {
      const text = await resp.text();
      // 忽略"未登录"错误响应（code 10）
      try {
        const parsed = JSON.parse(text);
        if (parsed.code === 10) {
          console.log(`\n⚠️  API 返回未登录，等待真实响应...`);
          return;
        }
      } catch {}
      apiResponseText = text;
      console.log(`\n🎯 捕获 API 响应：${u.split('?')[0]}  (${text.length} 字节)`);
    } catch {}
  }
});

console.log('🌐 正在打开文档页面...');
await page.goto(TARGET_URL, { waitUntil: 'load', timeout: 30000 });

// 检测是否需要登录
const needLogin = async () => {
  const u = page.url();
  if (isFeishu) {
    // 飞书登录页：passport.feishu.cn / accounts.feishu.cn / /login
    return u.includes('passport.feishu') || u.includes('accounts.feishu') || u.includes('/login');
  }
  // yitang 路径
  if (u.includes('/login') || u.includes('sso.')) return true;
  const tok = await readToken();
  if (!tok && hasSavedCookies) return true;
  return false;
};

if (await needLogin()) {
  console.log('⚠️  需要登录，正在跳转...');
  if (isFeishu) {
    if (!page.url().includes('passport') && !page.url().includes('accounts') && !page.url().includes('/login')) {
      await page.goto(TARGET_URL, { waitUntil: 'load', timeout: 30000 });
    }
    console.log('请在浏览器中完成飞书登录...');
    await page.waitForFunction(
      () => !location.href.includes('passport') && !location.href.includes('accounts') && !location.href.includes('/login'),
      { timeout: 300000 }
    );
  } else {
    if (!page.url().includes('/login') && !page.url().includes('sso.')) {
      await page.goto(LOGIN_URL, { waitUntil: 'load', timeout: 30000 });
    }
    console.log('请在浏览器中完成登录（微信扫码或手机验证码）...');
    await page.waitForURL('**/fs-doc/**', { timeout: 300000 });
  }
  console.log('\n✅ 登录成功');
  await page.waitForLoadState('networkidle', { timeout: 15000 }).catch(() => {});
}

// 保存最新 Cookie
const cookies = await context.cookies();
writeFileSync(COOKIE_FILE, JSON.stringify(cookies, null, 2));
console.log(`💾 Cookie 已保存`);

// ── 飞书原生路径 ───────────────────────────────────────────────────────────────
if (isFeishu) {
  if (feishuApiResponses.length === 0) {
    console.log('⏳ 等待飞书 API 数据加载...');
    await page.waitForTimeout(8000);
  }
  if (feishuApiResponses.length === 0) {
    console.log('🔄 重新加载页面...');
    await page.goto(TARGET_URL, { waitUntil: 'networkidle', timeout: 30000 });
    await page.waitForTimeout(5000);
  }
  if (feishuApiResponses.length === 0) {
    console.error('❌ 未捕获到飞书 API 响应，请检查登录状态或文档权限');
    await browser.close();
    process.exit(1);
  }

  // 提取 wiki node 元信息（wiki 页面需先拿 obj_token）
  let wikiMeta = null;
  const ftToken = TARGET_URL.match(/\/(wiki|docx)\/([A-Za-z0-9_-]+)/)?.[2] || '';
  if (TARGET_URL.includes('/wiki/')) {
    for (const item of feishuApiResponses) {
      if (item.kind === 'wiki') {
        wikiMeta = findWikiObjToken(item.data, ftToken);
        if (wikiMeta) {
          console.log(`📎 wiki → docx token: ${wikiMeta.obj_token}  标题: ${wikiMeta.title || '(未知)'}`);
          break;
        }
      }
    }

    // 如果是 wiki 页面且找到了 docx token，需要导航到 docx URL 来获取实际内容
    if (wikiMeta?.obj_token) {
      const docxUrl = TARGET_URL.replace(/\/wiki\/[^/]+/, `/docx/${wikiMeta.obj_token}`);
      console.log(`🔄 正在加载文档内容: ${docxUrl}`);
      feishuApiResponses.length = 0; // 清空之前的 wiki API 响应
      await page.goto(docxUrl, { waitUntil: 'load', timeout: 30000 });
      await page.waitForTimeout(3000);

      if (feishuApiResponses.length === 0) {
        console.log('⏳ 等待文档 API 数据加载...');
        await page.waitForTimeout(5000);
      }
    }
  }

  // 提取 blocks（去重）
  let docxBlocks = [];
  for (const item of feishuApiResponses) {
    if (item.kind !== 'doc') continue;
    const found = findFeishuBlocks(item.data);
    if (found.length) docxBlocks.push(...found);
  }
  const seenIds = new Set();
  docxBlocks = docxBlocks.filter(b => {
    if (!b.block_id || seenIds.has(b.block_id)) return false;
    seenIds.add(b.block_id);
    return true;
  });
  console.log(`📦 共提取 ${docxBlocks.length} 个 block`);

  if (docxBlocks.length === 0) {
    console.error('❌ 未获取到有效 block 数据');
    await browser.close();
    process.exit(1);
  }

  const pageTitle = wikiMeta?.title || await page.title();
  const markdown  = feishuBlocksToMd(docxBlocks);
  const output    = `# ${pageTitle}\n\n> Source: ${TARGET_URL}\n\n${markdown}`;
  const safeTitle = pageTitle.replace(/[/\\:*?"<>|]/g, '_').trim();
  const outDir    = resolve('output');
  if (!existsSync(outDir)) mkdirSync(outDir, { recursive: true });
  const outputPath = resolve(customOutput || `output/${safeTitle || 'output'}.md`);
  writeFileSync(outputPath, output, 'utf-8');

  console.log('');
  console.log('╔════════════════════════════════════════════╗');
  console.log(`║  ✅ 完成！共 ${output.length} 字符`);
  console.log(`║  📄 ${outputPath}`);
  console.log('╚════════════════════════════════════════════╝');
  await browser.close();
  process.exit(0);
}

// 读取 TOKEN（函数，方便重登后复用）
async function readToken() {
  return page.evaluate(() => {
    try {
      const raw = localStorage.getItem('#|g.TOKEN')
        || Object.entries(localStorage).find(([k]) => k.includes('TOKEN'))?.[1]
        || null;
      if (!raw) return null;
      return raw.startsWith('{') ? JSON.parse(raw).$v || null : raw;
    } catch { return null; }
  }).catch(() => null);
}

// 读取 TOKEN
let capturedToken = await page.evaluate(() => {
  try {
    const raw = localStorage.getItem('#|g.TOKEN')
      || Object.entries(localStorage).find(([k]) => k.includes('TOKEN'))?.[1]
      || null;
    if (!raw) return null;
    return raw.startsWith('{') ? JSON.parse(raw).$v || null : raw;
  } catch { return null; }
}).catch(() => null);
console.log('🔑 TOKEN:', capturedToken ? capturedToken.substring(0, 8) + '...' : '未找到');

if (!apiResponseText) {
  console.log('⏳ 等待 API 数据加载...');
  await page.waitForTimeout(10000);
}
if (!apiResponseText) {
  console.log('🔄 重新加载页面...');
  await page.goto(TARGET_URL, { waitUntil: 'networkidle', timeout: 30000 });
  await page.waitForTimeout(5000);
}
if (!apiResponseText) {
  console.error('❌ 未捕获到 API 响应，可能未登录或文档受限');
  await browser.close();
  process.exit(1);
}

if (!apiResponseText) {
  console.error('❌ 仍未获取到有效数据，请检查是否已完成登录或文档是否有访问权限');
  await browser.close();
  process.exit(1);
}

// ── 解密 ──────────────────────────────────────────────────────────────────────
let docData;
const envelope = JSON.parse(apiResponseText);
const payload  = envelope.data;

if (capturedToken && typeof payload === 'string') {
  try {
    const key = CryptoJS.enc.Utf8.parse(CryptoJS.MD5(capturedToken).toString());
    const iv  = CryptoJS.enc.Utf8.parse(capturedToken);
    const dec = CryptoJS.AES.decrypt(payload.trim(), key, {
      iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7,
    });
    docData = JSON.parse(dec.toString(CryptoJS.enc.Utf8));
    console.log('🔓 AES 解密成功');
  } catch (e) {
    console.log('⚠️  AES 解密失败：', e.message);
    docData = typeof payload === 'object' ? payload : envelope;
  }
} else {
  docData = typeof payload === 'object' ? payload : envelope;
  console.log('📄 直接使用响应数据');
}

// ── 转换并保存 ────────────────────────────────────────────────────────────────
const pageTitle  = await page.title();
const markdown   = blocksToMarkdown(docData.blocks);
const output     = `# ${pageTitle}\n\n> Source: ${TARGET_URL}\n\n${markdown}`;

// 输出文件名：优先用参数，其次用标题，最后回退 output.md
const safeTitle  = pageTitle.replace(/[/\\:*?"<>|]/g, '_').trim();
const outDir2    = resolve('output');
if (!existsSync(outDir2)) mkdirSync(outDir2, { recursive: true });
const outputPath = resolve(customOutput || `output/${safeTitle || 'output'}.md`);
writeFileSync(outputPath, output, 'utf-8');

console.log('');
console.log('╔════════════════════════════════════════════╗');
console.log(`║  ✅ 完成！共 ${output.length} 字符`);
console.log(`║  📄 ${outputPath}`);
console.log('╚════════════════════════════════════════════╝');

await browser.close();