Baoyu Post To Wechat

import { spawn } from 'node:child_process';
import fs from 'node:fs';
import { mkdir } from 'node:fs/promises';
import net from 'node:net';
import os from 'node:os';
import path from 'node:path';
import process from 'node:process';

export function sleep(ms: number): Promise<void> {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

export async function getFreePort(): Promise<number> {
  return new Promise((resolve, reject) => {
    const server = net.createServer();
    server.unref();
    server.on('error', reject);
    server.listen(0, '127.0.0.1', () => {
      const address = server.address();
      if (!address || typeof address === 'string') {
        server.close(() => reject(new Error('Unable to allocate a free TCP port.')));
        return;
      }
      const port = address.port;
      server.close((err) => {
        if (err) reject(err);
        else resolve(port);
      });
    });
  });
}

export function findChromeExecutable(): string | undefined {
  const override = process.env.WECHAT_BROWSER_CHROME_PATH?.trim();
  if (override && fs.existsSync(override)) return override;

  const candidates: string[] = [];
  switch (process.platform) {
    case 'darwin':
      candidates.push(
        '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome',
        '/Applications/Google Chrome Canary.app/Contents/MacOS/Google Chrome Canary',
        '/Applications/Chromium.app/Contents/MacOS/Chromium',
      );
      break;
    case 'win32':
      candidates.push(
        'C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe',
        'C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe',
      );
      break;
    default:
      candidates.push('/usr/bin/google-chrome', '/usr/bin/chromium');
      break;
  }

  for (const p of candidates) {
    if (fs.existsSync(p)) return p;
  }
  return undefined;
}

export function getDefaultProfileDir(): string {
  const base = process.env.XDG_DATA_HOME || path.join(os.homedir(), '.local', 'share');
  return path.join(base, 'wechat-browser-profile');
}

async function fetchJson<T = unknown>(url: string): Promise<T> {
  const res = await fetch(url, { redirect: 'follow' });
  if (!res.ok) throw new Error(`Request failed: ${res.status} ${res.statusText}`);
  return (await res.json()) as T;
}

async function waitForChromeDebugPort(port: number, timeoutMs: number): Promise<string> {
  const start = Date.now();
  let lastError: unknown = null;

  while (Date.now() - start < timeoutMs) {
    try {
      const version = await fetchJson<{ webSocketDebuggerUrl?: string }>(`http://127.0.0.1:${port}/json/version`);
      if (version.webSocketDebuggerUrl) return version.webSocketDebuggerUrl;
      lastError = new Error('Missing webSocketDebuggerUrl');
    } catch (error) {
      lastError = error;
    }
    await sleep(200);
  }

  throw new Error(`Chrome debug port not ready: ${lastError instanceof Error ? lastError.message : String(lastError)}`);
}

export class CdpConnection {
  private ws: WebSocket;
  private nextId = 0;
  private pending = new Map<number, { resolve: (v: unknown) => void; reject: (e: Error) => void; timer: ReturnType<typeof setTimeout> | null }>();
  private eventHandlers = new Map<string, Set<(params: unknown) => void>>();

  private constructor(ws: WebSocket) {
    this.ws = ws;
    this.ws.addEventListener('message', (event) => {
      try {
        const data = typeof event.data === 'string' ? event.data : new TextDecoder().decode(event.data as ArrayBuffer);
        const msg = JSON.parse(data) as { id?: number; method?: string; params?: unknown; result?: unknown; error?: { message?: string } };

        if (msg.method) {
          const handlers = this.eventHandlers.get(msg.method);
          if (handlers) handlers.forEach((h) => h(msg.params));
        }

        if (msg.id) {
          const pending = this.pending.get(msg.id);
          if (pending) {
            this.pending.delete(msg.id);
            if (pending.timer) clearTimeout(pending.timer);
            if (msg.error?.message) pending.reject(new Error(msg.error.message));
            else pending.resolve(msg.result);
          }
        }
      } catch {}
    });

    this.ws.addEventListener('close', () => {
      for (const [id, pending] of this.pending.entries()) {
        this.pending.delete(id);
        if (pending.timer) clearTimeout(pending.timer);
        pending.reject(new Error('CDP connection closed.'));
      }
    });
  }

  static async connect(url: string, timeoutMs: number): Promise<CdpConnection> {
    const ws = new WebSocket(url);
    await new Promise<void>((resolve, reject) => {
      const timer = setTimeout(() => reject(new Error('CDP connection timeout.')), timeoutMs);
      ws.addEventListener('open', () => { clearTimeout(timer); resolve(); });
      ws.addEventListener('error', () => { clearTimeout(timer); reject(new Error('CDP connection failed.')); });
    });
    return new CdpConnection(ws);
  }

  on(method: string, handler: (params: unknown) => void): void {
    if (!this.eventHandlers.has(method)) this.eventHandlers.set(method, new Set());
    this.eventHandlers.get(method)!.add(handler);
  }

  async send<T = unknown>(method: string, params?: Record<string, unknown>, options?: { sessionId?: string; timeoutMs?: number }): Promise<T> {
    const id = ++this.nextId;
    const message: Record<string, unknown> = { id, method };
    if (params) message.params = params;
    if (options?.sessionId) message.sessionId = options.sessionId;

    const timeoutMs = options?.timeoutMs ?? 15_000;

    const result = await new Promise<unknown>((resolve, reject) => {
      const timer = timeoutMs > 0 ? setTimeout(() => { this.pending.delete(id); reject(new Error(`CDP timeout: ${method}`)); }, timeoutMs) : null;
      this.pending.set(id, { resolve, reject, timer });
      this.ws.send(JSON.stringify(message));
    });

    return result as T;
  }

  close(): void {
    try { this.ws.close(); } catch {}
  }
}

export interface ChromeSession {
  cdp: CdpConnection;
  sessionId: string;
  targetId: string;
}

export async function tryConnectExisting(port: number): Promise<CdpConnection | null> {
  try {
    const version = await fetchJson<{ webSocketDebuggerUrl?: string }>(`http://127.0.0.1:${port}/json/version`);
    if (version.webSocketDebuggerUrl) {
      const cdp = await CdpConnection.connect(version.webSocketDebuggerUrl, 5_000);
      return cdp;
    }
  } catch {}
  return null;
}

export async function findExistingChromeDebugPort(): Promise<number | null> {
  if (process.platform !== 'darwin' && process.platform !== 'linux') return null;
  try {
    const { execSync } = await import('node:child_process');
    const cmd = process.platform === 'darwin'
      ? `lsof -nP -iTCP -sTCP:LISTEN 2>/dev/null | grep -i 'google\\|chrome' | awk '{print $9}' | sed 's/.*://'`
      : `ss -tlnp 2>/dev/null | grep -i chrome | awk '{print $4}' | sed 's/.*://'`;
    const output = execSync(cmd, { encoding: 'utf-8', timeout: 5_000 }).trim();
    if (!output) return null;
    const ports = output.split('\n').map(p => parseInt(p, 10)).filter(p => !isNaN(p) && p > 0);
    for (const port of ports) {
      try {
        const version = await fetchJson<{ webSocketDebuggerUrl?: string }>(`http://127.0.0.1:${port}/json/version`);
        if (version.webSocketDebuggerUrl) return port;
      } catch {}
    }
  } catch {}
  return null;
}

export async function launchChrome(url: string, profileDir?: string): Promise<{ cdp: CdpConnection; chrome: ReturnType<typeof spawn> }> {
  const chromePath = findChromeExecutable();
  if (!chromePath) throw new Error('Chrome not found. Set WECHAT_BROWSER_CHROME_PATH env var.');

  const profile = profileDir ?? getDefaultProfileDir();
  await mkdir(profile, { recursive: true });

  const port = await getFreePort();
  console.log(`[cdp] Launching Chrome (profile: ${profile})`);

  const chrome = spawn(chromePath, [
    `--remote-debugging-port=${port}`,
    `--user-data-dir=${profile}`,
    '--no-first-run',
    '--no-default-browser-check',
    '--disable-blink-features=AutomationControlled',
    '--start-maximized',
    url,
  ], { stdio: 'ignore' });

  const wsUrl = await waitForChromeDebugPort(port, 30_000);
  const cdp = await CdpConnection.connect(wsUrl, 30_000);

  return { cdp, chrome };
}

export async function getPageSession(cdp: CdpConnection, urlPattern: string): Promise<ChromeSession> {
  const targets = await cdp.send<{ targetInfos: Array<{ targetId: string; url: string; type: string }> }>('Target.getTargets');
  let pageTarget = targets.targetInfos.find((t) => t.type === 'page' && t.url.includes(urlPattern));

  if (!pageTarget) throw new Error(`Page not found: ${urlPattern}`);

  const { sessionId } = await cdp.send<{ sessionId: string }>('Target.attachToTarget', { targetId: pageTarget.targetId, flatten: true });

  await cdp.send('Page.enable', {}, { sessionId });
  await cdp.send('Runtime.enable', {}, { sessionId });
  await cdp.send('DOM.enable', {}, { sessionId });

  return { cdp, sessionId, targetId: pageTarget.targetId };
}

export async function waitForNewTab(cdp: CdpConnection, initialIds: Set<string>, urlPattern: string, timeoutMs = 30_000): Promise<string> {
  const start = Date.now();
  while (Date.now() - start < timeoutMs) {
    const targets = await cdp.send<{ targetInfos: Array<{ targetId: string; url: string; type: string }> }>('Target.getTargets');
    const newTab = targets.targetInfos.find(t => t.type === 'page' && !initialIds.has(t.targetId) && t.url.includes(urlPattern));
    if (newTab) return newTab.targetId;
    await sleep(500);
  }
  throw new Error(`New tab not found: ${urlPattern}`);
}

export async function clickElement(session: ChromeSession, selector: string): Promise<void> {
  const posResult = await session.cdp.send<{ result: { value: string } }>('Runtime.evaluate', {
    expression: `
      (function() {
        const el = document.querySelector('${selector}');
        if (!el) return 'null';
        el.scrollIntoView({ block: 'center' });
        const rect = el.getBoundingClientRect();
        return JSON.stringify({ x: rect.x + rect.width / 2, y: rect.y + rect.height / 2 });
      })()
    `,
    returnByValue: true,
  }, { sessionId: session.sessionId });

  if (posResult.result.value === 'null') throw new Error(`Element not found: ${selector}`);
  const pos = JSON.parse(posResult.result.value);

  await session.cdp.send('Input.dispatchMouseEvent', { type: 'mousePressed', x: pos.x, y: pos.y, button: 'left', clickCount: 1 }, { sessionId: session.sessionId });
  await sleep(50);
  await session.cdp.send('Input.dispatchMouseEvent', { type: 'mouseReleased', x: pos.x, y: pos.y, button: 'left', clickCount: 1 }, { sessionId: session.sessionId });
}

export async function typeText(session: ChromeSession, text: string): Promise<void> {
  const lines = text.split('\n');
  for (let i = 0; i < lines.length; i++) {
    if (lines[i].length > 0) {
      await session.cdp.send('Input.insertText', { text: lines[i] }, { sessionId: session.sessionId });
    }
    if (i < lines.length - 1) {
      await session.cdp.send('Input.dispatchKeyEvent', { type: 'keyDown', key: 'Enter', code: 'Enter', windowsVirtualKeyCode: 13 }, { sessionId: session.sessionId });
      await session.cdp.send('Input.dispatchKeyEvent', { type: 'keyUp', key: 'Enter', code: 'Enter', windowsVirtualKeyCode: 13 }, { sessionId: session.sessionId });
    }
    await sleep(30);
  }
}

export async function pasteFromClipboard(session: ChromeSession): Promise<void> {
  const modifiers = process.platform === 'darwin' ? 4 : 2;
  await session.cdp.send('Input.dispatchKeyEvent', { type: 'keyDown', key: 'v', code: 'KeyV', modifiers, windowsVirtualKeyCode: 86 }, { sessionId: session.sessionId });
  await session.cdp.send('Input.dispatchKeyEvent', { type: 'keyUp', key: 'v', code: 'KeyV', modifiers, windowsVirtualKeyCode: 86 }, { sessionId: session.sessionId });
}

export async function evaluate<T = unknown>(session: ChromeSession, expression: string): Promise<T> {
  const result = await session.cdp.send<{ result: { value: T } }>('Runtime.evaluate', {
    expression,
    returnByValue: true,
  }, { sessionId: session.sessionId });
  return result.result.value;
}

import { spawnSync } from 'node:child_process';
import fs from 'node:fs';
import { mkdtemp, rm, writeFile } from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import process from 'node:process';
import { findChromeExecutable, getDefaultProfileDir } from './cdp.ts';

interface CheckResult {
  name: string;
  ok: boolean;
  detail: string;
}

const results: CheckResult[] = [];

function log(label: string, ok: boolean, detail: string): void {
  results.push({ name: label, ok, detail });
  const icon = ok ? '✅' : '❌';
  console.log(`${icon} ${label}: ${detail}`);
}

function warn(label: string, detail: string): void {
  results.push({ name: label, ok: true, detail });
  console.log(`⚠️  ${label}: ${detail}`);
}

async function checkChrome(): Promise<void> {
  const chromePath = findChromeExecutable();
  if (chromePath) {
    log('Chrome', true, chromePath);
  } else {
    log('Chrome', false, 'Not found. Set WECHAT_BROWSER_CHROME_PATH env var or install Chrome.');
  }
}

async function checkProfileIsolation(): Promise<void> {
  const profileDir = getDefaultProfileDir();
  const userChromeDir = process.platform === 'darwin'
    ? path.join(os.homedir(), 'Library', 'Application Support', 'Google', 'Chrome')
    : process.platform === 'win32'
      ? path.join(os.homedir(), 'AppData', 'Local', 'Google', 'Chrome', 'User Data')
      : path.join(os.homedir(), '.config', 'google-chrome');

  const isIsolated = !profileDir.startsWith(userChromeDir);
  log('Profile isolation', isIsolated, `Skill profile: ${profileDir}`);

  if (isIsolated) {
    const exists = fs.existsSync(profileDir);
    if (exists) {
      log('Profile dir', true, 'Exists and accessible');
    } else {
      try {
        fs.mkdirSync(profileDir, { recursive: true });
        log('Profile dir', true, 'Created successfully');
      } catch (e) {
        log('Profile dir', false, `Cannot create: ${e instanceof Error ? e.message : String(e)}`);
      }
    }
  }
}

async function checkAccessibility(): Promise<void> {
  if (process.platform !== 'darwin') {
    log('Accessibility', true, `Skipped (not macOS, platform: ${process.platform})`);
    return;
  }

  const result = spawnSync('osascript', ['-e', `
    tell application "System Events"
      set frontApp to name of first application process whose frontmost is true
      return frontApp
    end tell
  `], { stdio: 'pipe', timeout: 10_000 });

  if (result.status === 0) {
    const app = result.stdout?.toString().trim();
    log('Accessibility (System Events)', true, `Frontmost app: ${app}`);
  } else {
    const stderr = result.stderr?.toString().trim() || '';
    if (stderr.includes('not allowed assistive access') || stderr.includes('1002')) {
      log('Accessibility (System Events)', false,
        'Denied. Grant access: System Settings → Privacy & Security → Accessibility → enable your terminal app');
    } else {
      log('Accessibility (System Events)', false, `Failed: ${stderr}`);
    }
  }
}

async function checkClipboardCopy(): Promise<void> {
  if (process.platform !== 'darwin') {
    log('Clipboard copy (image)', true, `Skipped (not macOS)`);
    return;
  }

  const tmpDir = await mkdtemp(path.join(os.tmpdir(), 'wechat-check-'));
  try {
    const testPng = path.join(tmpDir, 'test.png');
    const swiftSrc = `import AppKit
import Foundation
let size = NSSize(width: 2, height: 2)
let image = NSImage(size: size)
image.lockFocus()
NSColor.red.set()
NSBezierPath.fill(NSRect(origin: .zero, size: size))
image.unlockFocus()
guard let tiff = image.tiffRepresentation,
      let rep = NSBitmapImageRep(data: tiff),
      let png = rep.representation(using: .png, properties: [:]) else {
  FileHandle.standardError.write("Failed to create test PNG\\n".data(using: .utf8)!)
  exit(1)
}
try png.write(to: URL(fileURLWithPath: CommandLine.arguments[1]))
`;
    const genScript = path.join(tmpDir, 'gen.swift');
    await writeFile(genScript, swiftSrc, 'utf8');
    const genResult = spawnSync('swift', [genScript, testPng], { stdio: 'pipe', timeout: 30_000 });
    if (genResult.status !== 0) {
      log('Clipboard copy (image)', false, `Cannot create test image: ${genResult.stderr?.toString().trim()}`);
      return;
    }

    const clipSrc = `import AppKit
import Foundation
guard let image = NSImage(contentsOfFile: CommandLine.arguments[1]) else {
  FileHandle.standardError.write("Failed to load image\\n".data(using: .utf8)!)
  exit(1)
}
let pb = NSPasteboard.general
pb.clearContents()
if !pb.writeObjects([image]) {
  FileHandle.standardError.write("Failed to write to clipboard\\n".data(using: .utf8)!)
  exit(1)
}
`;
    const clipScript = path.join(tmpDir, 'clip.swift');
    await writeFile(clipScript, clipSrc, 'utf8');
    const clipResult = spawnSync('swift', [clipScript, testPng], { stdio: 'pipe', timeout: 30_000 });
    if (clipResult.status === 0) {
      log('Clipboard copy (image)', true, 'Can copy image to clipboard via Swift/AppKit');
    } else {
      log('Clipboard copy (image)', false, `Failed: ${clipResult.stderr?.toString().trim()}`);
    }
  } finally {
    await rm(tmpDir, { recursive: true, force: true });
  }
}

async function checkPasteKeystroke(): Promise<void> {
  if (process.platform === 'darwin') {
    const result = spawnSync('osascript', ['-e', `
      tell application "System Events"
        set canSend to true
        return canSend
      end tell
    `], { stdio: 'pipe', timeout: 10_000 });

    if (result.status === 0) {
      log('Paste keystroke (osascript)', true, 'System Events can send keystrokes');
    } else {
      const stderr = result.stderr?.toString().trim() || '';
      log('Paste keystroke (osascript)', false, `Cannot send keystrokes: ${stderr}`);
    }
  } else if (process.platform === 'linux') {
    const xdotool = spawnSync('which', ['xdotool'], { stdio: 'pipe' });
    const ydotool = spawnSync('which', ['ydotool'], { stdio: 'pipe' });
    if (xdotool.status === 0) {
      log('Paste keystroke', true, 'xdotool available (X11)');
    } else if (ydotool.status === 0) {
      log('Paste keystroke', true, 'ydotool available (Wayland)');
    } else {
      log('Paste keystroke', false, 'No tool found. Install xdotool (X11) or ydotool (Wayland).');
    }
  } else if (process.platform === 'win32') {
    log('Paste keystroke', true, 'Windows uses PowerShell SendKeys (built-in)');
  }
}

async function checkBun(): Promise<void> {
  const result = spawnSync('npx', ['-y', 'bun', '--version'], { stdio: 'pipe', timeout: 30_000 });
  if (result.status === 0) {
    log('Bun runtime', true, `v${result.stdout?.toString().trim()}`);
  } else {
    log('Bun runtime', false, 'Cannot run bun. Install: curl -fsSL https://bun.sh/install | bash');
  }
}

async function checkApiCredentials(): Promise<void> {
  const cwd = process.cwd();
  const projectEnv = path.join(cwd, '.baoyu-skills', '.env');
  const userEnv = path.join(os.homedir(), '.baoyu-skills', '.env');

  let found = false;
  for (const envPath of [projectEnv, userEnv]) {
    if (fs.existsSync(envPath)) {
      const content = fs.readFileSync(envPath, 'utf8');
      if (content.includes('WECHAT_APP_ID')) {
        log('API credentials', true, `Found in ${envPath}`);
        found = true;
        break;
      }
    }
  }

  if (!found) {
    warn('API credentials', 'Not found. Required for API publishing method. Run the skill to set up via guided flow.');
  }
}

async function checkRunningChromeConflict(): Promise<void> {
  if (process.platform !== 'darwin') return;

  const result = spawnSync('pgrep', ['-f', 'Google Chrome'], { stdio: 'pipe' });
  const pids = result.stdout?.toString().trim().split('\n').filter(Boolean) || [];

  if (pids.length > 0) {
    warn('Running Chrome instances', `${pids.length} Chrome process(es) detected. The skill uses --user-data-dir for isolation, so this is safe.`);
  } else {
    log('Running Chrome instances', true, 'No existing Chrome processes');
  }
}

async function main(): Promise<void> {
  console.log('=== baoyu-post-to-wechat: Permission & Environment Check ===\n');

  await checkChrome();
  await checkProfileIsolation();
  await checkBun();
  await checkAccessibility();
  await checkClipboardCopy();
  await checkPasteKeystroke();
  await checkApiCredentials();
  await checkRunningChromeConflict();

  console.log('\n--- Summary ---');
  const failed = results.filter((r) => !r.ok);
  if (failed.length === 0) {
    console.log('All checks passed. Ready to post to WeChat.');
  } else {
    console.log(`${failed.length} issue(s) found:`);
    for (const f of failed) {
      console.log(`  ❌ ${f.name}: ${f.detail}`);
    }
    process.exit(1);
  }
}

await main().catch((err) => {
  console.error(`Error: ${err instanceof Error ? err.message : String(err)}`);
  process.exit(1);
});

import { spawn } from 'node:child_process';
import fs from 'node:fs';
import { mkdtemp, rm, writeFile } from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import process from 'node:process';

const SUPPORTED_IMAGE_EXTS = new Set(['.jpg', '.jpeg', '.png', '.gif', '.webp']);

function printUsage(exitCode = 0): never {
  console.log(`Copy image or HTML to system clipboard

Supports:
  - Image files (jpg, png, gif, webp) - copies as image data
  - HTML content - copies as rich text for paste

Usage:
  # Copy image to clipboard
  npx -y bun copy-to-clipboard.ts image /path/to/image.jpg

  # Copy HTML to clipboard
  npx -y bun copy-to-clipboard.ts html "<p>Hello</p>"

  # Copy HTML from file
  npx -y bun copy-to-clipboard.ts html --file /path/to/content.html
`);
  process.exit(exitCode);
}

function resolvePath(filePath: string): string {
  return path.isAbsolute(filePath) ? filePath : path.resolve(process.cwd(), filePath);
}

function inferImageMimeType(imagePath: string): string {
  const ext = path.extname(imagePath).toLowerCase();
  switch (ext) {
    case '.jpg':
    case '.jpeg':
      return 'image/jpeg';
    case '.png':
      return 'image/png';
    case '.gif':
      return 'image/gif';
    case '.webp':
      return 'image/webp';
    default:
      return 'application/octet-stream';
  }
}

type RunResult = { stdout: string; stderr: string; exitCode: number };

async function runCommand(
  command: string,
  args: string[],
  options?: { input?: string | Buffer; allowNonZeroExit?: boolean },
): Promise<RunResult> {
  return await new Promise<RunResult>((resolve, reject) => {
    const child = spawn(command, args, { stdio: ['pipe', 'pipe', 'pipe'] });
    const stdoutChunks: Buffer[] = [];
    const stderrChunks: Buffer[] = [];

    child.stdout.on('data', (chunk) => stdoutChunks.push(Buffer.from(chunk)));
    child.stderr.on('data', (chunk) => stderrChunks.push(Buffer.from(chunk)));
    child.on('error', reject);
    child.on('close', (code) => {
      resolve({
        stdout: Buffer.concat(stdoutChunks).toString('utf8'),
        stderr: Buffer.concat(stderrChunks).toString('utf8'),
        exitCode: code ?? 0,
      });
    });

    if (options?.input != null) child.stdin.write(options.input);
    child.stdin.end();
  }).then((result) => {
    if (!options?.allowNonZeroExit && result.exitCode !== 0) {
      const details = result.stderr.trim() || result.stdout.trim();
      throw new Error(`Command failed (${command}): exit ${result.exitCode}${details ? `\n${details}` : ''}`);
    }
    return result;
  });
}

async function commandExists(command: string): Promise<boolean> {
  if (process.platform === 'win32') {
    const result = await runCommand('where', [command], { allowNonZeroExit: true });
    return result.exitCode === 0 && result.stdout.trim().length > 0;
  }
  const result = await runCommand('which', [command], { allowNonZeroExit: true });
  return result.exitCode === 0 && result.stdout.trim().length > 0;
}

async function runCommandWithFileStdin(command: string, args: string[], filePath: string): Promise<void> {
  await new Promise<void>((resolve, reject) => {
    const child = spawn(command, args, { stdio: ['pipe', 'pipe', 'pipe'] });
    const stderrChunks: Buffer[] = [];
    const stdoutChunks: Buffer[] = [];

    child.stdout.on('data', (chunk) => stdoutChunks.push(Buffer.from(chunk)));
    child.stderr.on('data', (chunk) => stderrChunks.push(Buffer.from(chunk)));
    child.on('error', reject);
    child.on('close', (code) => {
      const exitCode = code ?? 0;
      if (exitCode !== 0) {
        const details = Buffer.concat(stderrChunks).toString('utf8').trim() || Buffer.concat(stdoutChunks).toString('utf8').trim();
        reject(
          new Error(`Command failed (${command}): exit ${exitCode}${details ? `\n${details}` : ''}`),
        );
        return;
      }
      resolve();
    });

    fs.createReadStream(filePath).on('error', reject).pipe(child.stdin);
  });
}

async function withTempDir<T>(prefix: string, fn: (tempDir: string) => Promise<T>): Promise<T> {
  const tempDir = await mkdtemp(path.join(os.tmpdir(), prefix));
  try {
    return await fn(tempDir);
  } finally {
    await rm(tempDir, { recursive: true, force: true });
  }
}

function getMacSwiftClipboardSource(): string {
  return `import AppKit
import Foundation

func die(_ message: String, _ code: Int32 = 1) -> Never {
  FileHandle.standardError.write(message.data(using: .utf8)!)
  exit(code)
}

if CommandLine.arguments.count < 3 {
  die("Usage: clipboard.swift <image|html> <path>\\n")
}

let mode = CommandLine.arguments[1]
let inputPath = CommandLine.arguments[2]
let pasteboard = NSPasteboard.general
pasteboard.clearContents()

switch mode {
case "image":
  guard let image = NSImage(contentsOfFile: inputPath) else {
    die("Failed to load image: \\(inputPath)\\n")
  }
  if !pasteboard.writeObjects([image]) {
    die("Failed to write image to clipboard\\n")
  }

case "html":
  let url = URL(fileURLWithPath: inputPath)
  let data: Data
  do {
    data = try Data(contentsOf: url)
  } catch {
    die("Failed to read HTML file: \\(inputPath)\\n")
  }

  _ = pasteboard.setData(data, forType: .html)

  let options: [NSAttributedString.DocumentReadingOptionKey: Any] = [
    .documentType: NSAttributedString.DocumentType.html,
    .characterEncoding: String.Encoding.utf8.rawValue
  ]

  if let attr = try? NSAttributedString(data: data, options: options, documentAttributes: nil) {
    pasteboard.setString(attr.string, forType: .string)
    if let rtf = try? attr.data(
      from: NSRange(location: 0, length: attr.length),
      documentAttributes: [.documentType: NSAttributedString.DocumentType.rtf]
    ) {
      _ = pasteboard.setData(rtf, forType: .rtf)
    }
  } else if let html = String(data: data, encoding: .utf8) {
    pasteboard.setString(html, forType: .string)
  }

default:
  die("Unknown mode: \\(mode)\\n")
}
`;
}

async function copyImageMac(imagePath: string): Promise<void> {
  await withTempDir('copy-to-clipboard-', async (tempDir) => {
    const swiftPath = path.join(tempDir, 'clipboard.swift');
    await writeFile(swiftPath, getMacSwiftClipboardSource(), 'utf8');
    await runCommand('swift', [swiftPath, 'image', imagePath]);
  });
}

async function copyHtmlMac(htmlFilePath: string): Promise<void> {
  await withTempDir('copy-to-clipboard-', async (tempDir) => {
    const swiftPath = path.join(tempDir, 'clipboard.swift');
    await writeFile(swiftPath, getMacSwiftClipboardSource(), 'utf8');
    await runCommand('swift', [swiftPath, 'html', htmlFilePath]);
  });
}

async function copyImageLinux(imagePath: string): Promise<void> {
  const mime = inferImageMimeType(imagePath);
  if (await commandExists('wl-copy')) {
    await runCommandWithFileStdin('wl-copy', ['--type', mime], imagePath);
    return;
  }
  if (await commandExists('xclip')) {
    await runCommand('xclip', ['-selection', 'clipboard', '-t', mime, '-i', imagePath]);
    return;
  }
  throw new Error('No clipboard tool found. Install `wl-clipboard` (wl-copy) or `xclip`.');
}

async function copyHtmlLinux(htmlFilePath: string): Promise<void> {
  if (await commandExists('wl-copy')) {
    await runCommandWithFileStdin('wl-copy', ['--type', 'text/html'], htmlFilePath);
    return;
  }
  if (await commandExists('xclip')) {
    await runCommand('xclip', ['-selection', 'clipboard', '-t', 'text/html', '-i', htmlFilePath]);
    return;
  }
  throw new Error('No clipboard tool found. Install `wl-clipboard` (wl-copy) or `xclip`.');
}

async function copyImageWindows(imagePath: string): Promise<void> {
  const escaped = imagePath.replace(/'/g, "''");
  const ps = [
    'Add-Type -AssemblyName System.Windows.Forms',
    'Add-Type -AssemblyName System.Drawing',
    `$img = [System.Drawing.Image]::FromFile('${escaped}')`,
    '[System.Windows.Forms.Clipboard]::SetImage($img)',
    '$img.Dispose()',
  ].join('; ');
  await runCommand('powershell.exe', ['-NoProfile', '-Sta', '-Command', ps]);
}

async function copyHtmlWindows(htmlFilePath: string): Promise<void> {
  const escaped = htmlFilePath.replace(/'/g, "''");
  const ps = [
    'Add-Type -AssemblyName System.Windows.Forms',
    `$html = Get-Content -Raw -LiteralPath '${escaped}'`,
    '[System.Windows.Forms.Clipboard]::SetText($html, [System.Windows.Forms.TextDataFormat]::Html)',
  ].join('; ');
  await runCommand('powershell.exe', ['-NoProfile', '-Sta', '-Command', ps]);
}

async function copyImageToClipboard(imagePathInput: string): Promise<void> {
  const imagePath = resolvePath(imagePathInput);
  const ext = path.extname(imagePath).toLowerCase();
  if (!SUPPORTED_IMAGE_EXTS.has(ext)) {
    throw new Error(
      `Unsupported image type: ${ext || '(none)'} (supported: ${Array.from(SUPPORTED_IMAGE_EXTS).join(', ')})`,
    );
  }
  if (!fs.existsSync(imagePath)) throw new Error(`File not found: ${imagePath}`);

  switch (process.platform) {
    case 'darwin':
      await copyImageMac(imagePath);
      return;
    case 'linux':
      await copyImageLinux(imagePath);
      return;
    case 'win32':
      await copyImageWindows(imagePath);
      return;
    default:
      throw new Error(`Unsupported platform: ${process.platform}`);
  }
}

async function copyHtmlFileToClipboard(htmlFilePathInput: string): Promise<void> {
  const htmlFilePath = resolvePath(htmlFilePathInput);
  if (!fs.existsSync(htmlFilePath)) throw new Error(`File not found: ${htmlFilePath}`);

  switch (process.platform) {
    case 'darwin':
      await copyHtmlMac(htmlFilePath);
      return;
    case 'linux':
      await copyHtmlLinux(htmlFilePath);
      return;
    case 'win32':
      await copyHtmlWindows(htmlFilePath);
      return;
    default:
      throw new Error(`Unsupported platform: ${process.platform}`);
  }
}

async function readStdinText(): Promise<string | null> {
  if (process.stdin.isTTY) return null;
  const chunks: Buffer[] = [];
  for await (const chunk of process.stdin) {
    chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
  }
  const text = Buffer.concat(chunks).toString('utf8');
  return text.length > 0 ? text : null;
}

async function copyHtmlToClipboard(args: string[]): Promise<void> {
  let htmlFile: string | undefined;
  const positional: string[] = [];

  for (let i = 0; i < args.length; i += 1) {
    const arg = args[i] ?? '';
    if (arg === '--help' || arg === '-h') printUsage(0);
    if (arg === '--file') {
      htmlFile = args[i + 1];
      i += 1;
      continue;
    }
    if (arg.startsWith('--file=')) {
      htmlFile = arg.slice('--file='.length);
      continue;
    }
    if (arg === '--') {
      positional.push(...args.slice(i + 1));
      break;
    }
    if (arg.startsWith('-')) {
      throw new Error(`Unknown option: ${arg}`);
    }
    positional.push(arg);
  }

  if (htmlFile && positional.length > 0) {
    throw new Error('Do not pass HTML text when using --file.');
  }

  if (htmlFile) {
    await copyHtmlFileToClipboard(htmlFile);
    return;
  }

  const htmlFromArgs = positional.join(' ').trim();
  const htmlFromStdin = (await readStdinText())?.trim() ?? '';
  const html = htmlFromArgs || htmlFromStdin;
  if (!html) throw new Error('Missing HTML input. Provide a string or use --file.');

  await withTempDir('copy-to-clipboard-', async (tempDir) => {
    const htmlPath = path.join(tempDir, 'input.html');
    await writeFile(htmlPath, html, 'utf8');
    await copyHtmlFileToClipboard(htmlPath);
  });
}

async function main(): Promise<void> {
  const argv = process.argv.slice(2);
  if (argv.length === 0) printUsage(1);

  const command = argv[0];
  if (command === '--help' || command === '-h') printUsage(0);

  if (command === 'image') {
    const imagePath = argv[1];
    if (!imagePath) throw new Error('Missing image path.');
    await copyImageToClipboard(imagePath);
    return;
  }

  if (command === 'html') {
    await copyHtmlToClipboard(argv.slice(1));
    return;
  }

  throw new Error(`Unknown command: ${command}`);
}

await main().catch((err) => {
  const message = err instanceof Error ? err.message : String(err);
  console.error(`Error: ${message}`);
  process.exit(1);
});

import fs from 'node:fs';
import path from 'node:path';
import { mkdir, writeFile } from 'node:fs/promises';
import os from 'node:os';
import { createHash } from 'node:crypto';
import { fileURLToPath } from 'node:url';
import https from 'node:https';
import http from 'node:http';
import { spawnSync } from 'node:child_process';
import process from 'node:process';

interface ImageInfo {
  placeholder: string;
  localPath: string;
  originalPath: string;
}

interface ParsedResult {
  title: string;
  author: string;
  summary: string;
  htmlPath: string;
  contentImages: ImageInfo[];
}

function downloadFile(url: string, destPath: string): Promise<void> {
  return new Promise((resolve, reject) => {
    const protocol = url.startsWith('https') ? https : http;
    const file = fs.createWriteStream(destPath);

    const request = protocol.get(url, { headers: { 'User-Agent': 'Mozilla/5.0' } }, (response) => {
      if (response.statusCode === 301 || response.statusCode === 302) {
        const redirectUrl = response.headers.location;
        if (redirectUrl) {
          file.close();
          fs.unlinkSync(destPath);
          downloadFile(redirectUrl, destPath).then(resolve).catch(reject);
          return;
        }
      }

      if (response.statusCode !== 200) {
        file.close();
        fs.unlinkSync(destPath);
        reject(new Error(`Failed to download: ${response.statusCode}`));
        return;
      }

      response.pipe(file);
      file.on('finish', () => {
        file.close();
        resolve();
      });
    });

    request.on('error', (err) => {
      file.close();
      fs.unlink(destPath, () => {});
      reject(err);
    });

    request.setTimeout(30000, () => {
      request.destroy();
      reject(new Error('Download timeout'));
    });
  });
}

function getImageExtension(urlOrPath: string): string {
  const match = urlOrPath.match(/\.(jpg|jpeg|png|gif|webp)(\?|$)/i);
  return match ? match[1]!.toLowerCase() : 'png';
}

async function resolveImagePath(imagePath: string, baseDir: string, tempDir: string): Promise<string> {
  if (imagePath.startsWith('http://') || imagePath.startsWith('https://')) {
    const hash = createHash('md5').update(imagePath).digest('hex').slice(0, 8);
    const ext = getImageExtension(imagePath);
    const localPath = path.join(tempDir, `remote_${hash}.${ext}`);

    if (!fs.existsSync(localPath)) {
      console.error(`[md-to-wechat] Downloading: ${imagePath}`);
      await downloadFile(imagePath, localPath);
    }
    return localPath;
  }

  if (path.isAbsolute(imagePath)) {
    return imagePath;
  }

  return path.resolve(baseDir, imagePath);
}

function parseFrontmatter(content: string): { frontmatter: Record<string, string>; body: string } {
  const match = content.match(/^---\r?\n([\s\S]*?)\r?\n---\r?\n([\s\S]*)$/);
  if (!match) return { frontmatter: {}, body: content };

  const frontmatter: Record<string, string> = {};
  const lines = match[1]!.split('\n');
  for (const line of lines) {
    const colonIdx = line.indexOf(':');
    if (colonIdx > 0) {
      const key = line.slice(0, colonIdx).trim();
      let value = line.slice(colonIdx + 1).trim();
      if ((value.startsWith('"') && value.endsWith('"')) || (value.startsWith("'") && value.endsWith("'"))) {
        value = value.slice(1, -1);
      }
      frontmatter[key] = value;
    }
  }

  return { frontmatter, body: match[2]! };
}

export async function convertMarkdown(markdownPath: string, options?: { title?: string; theme?: string; color?: string }): Promise<ParsedResult> {
  const baseDir = path.dirname(markdownPath);
  const content = fs.readFileSync(markdownPath, 'utf-8');
  const theme = options?.theme ?? 'default';

  const { frontmatter, body } = parseFrontmatter(content);

  let title = options?.title ?? frontmatter.title ?? '';
  let bodyWithoutTitle = body;
  if (!title) {
    const lines = body.split('\n');
    for (const line of lines) {
      const trimmed = line.trim();
      if (!trimmed) continue;
      const headingMatch = trimmed.match(/^#{1,2}\s+(.+)$/);
      if (headingMatch) {
        title = headingMatch[1]!;
        bodyWithoutTitle = body.replace(/^#{1,2}\s+.+\r?\n?/, '');
      }
      break;
    }
  } else {
    bodyWithoutTitle = body.replace(/^#{1,2}\s+.+\r?\n?/, '');
  }
  if (!title) title = path.basename(markdownPath, path.extname(markdownPath));
  const author = frontmatter.author || '';
  let summary = frontmatter.description || frontmatter.summary || '';

  if (!summary) {
    const lines = bodyWithoutTitle.split('\n');
    for (const line of lines) {
      const trimmed = line.trim();
      if (!trimmed) continue;
      if (trimmed.startsWith('#')) continue;
      if (trimmed.startsWith('![')) continue;
      if (trimmed.startsWith('>')) continue;
      if (trimmed.startsWith('-') || trimmed.startsWith('*')) continue;
      if (/^\d+\./.test(trimmed)) continue;

      const cleanText = trimmed
        .replace(/\*\*(.+?)\*\*/g, '$1')
        .replace(/\*(.+?)\*/g, '$1')
        .replace(/\[([^\]]+)\]\([^)]+\)/g, '$1')
        .replace(/`([^`]+)`/g, '$1');

      if (cleanText.length > 20) {
        summary = cleanText.length > 120 ? cleanText.slice(0, 117) + '...' : cleanText;
        break;
      }
    }
  }

  const images: Array<{ src: string; placeholder: string }> = [];
  let imageCounter = 0;

  const modifiedBody = bodyWithoutTitle.replace(/!\[([^\]]*)\]\(([^)]+)\)/g, (match, alt, src) => {
    const placeholder = `WECHATIMGPH_${++imageCounter}`;
    images.push({ src, placeholder });
    return placeholder;
  });

  const modifiedMarkdown = `---\n${Object.entries(frontmatter).map(([k, v]) => `${k}: ${v}`).join('\n')}\n---\n${modifiedBody}`;

  const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'wechat-article-images-'));
  const tempMdPath = path.join(tempDir, 'temp-article.md');
  await writeFile(tempMdPath, modifiedMarkdown, 'utf-8');

  const __filename = fileURLToPath(import.meta.url);
  const __dirname = path.dirname(__filename);
  const renderScript = path.join(__dirname, 'md', 'render.ts');

  const renderArgs = ['-y', 'bun', renderScript, tempMdPath, '--theme', theme];
  if (options?.color) renderArgs.push('--color', options.color);

  console.error(`[md-to-wechat] Rendering markdown with theme: ${theme}${options?.color ? `, color: ${options.color}` : ''}`);

  const result = spawnSync('npx', renderArgs, {
    stdio: ['inherit', 'pipe', 'pipe'],
    cwd: baseDir,
  });

  if (result.status !== 0) {
    const stderr = result.stderr?.toString() || '';
    throw new Error(`Render failed: ${stderr}`);
  }

  const htmlPath = tempMdPath.replace(/\.md$/i, '.html');
  if (!fs.existsSync(htmlPath)) {
    throw new Error(`HTML file not generated: ${htmlPath}`);
  }

  const contentImages: ImageInfo[] = [];
  for (const img of images) {
    const localPath = await resolveImagePath(img.src, baseDir, tempDir);
    contentImages.push({
      placeholder: img.placeholder,
      localPath,
      originalPath: img.src,
    });
  }

  return {
    title,
    author,
    summary,
    htmlPath,
    contentImages,
  };
}

function printUsage(): never {
  console.log(`Convert Markdown to WeChat-ready HTML with image placeholders

Usage:
  npx -y bun md-to-wechat.ts <markdown_file> [options]

Options:
  --title <title>     Override title
  --theme <name>      Theme name (default, grace, simple, modern)
  --color <name|hex>  Primary color (blue, green, vermilion, etc. or hex)
  --help              Show this help

Output JSON format:
{
  "title": "Article Title",
  "htmlPath": "/tmp/wechat-article-images/temp-article.html",
  "contentImages": [
    {
      "placeholder": "WECHATIMGPH_1",
      "localPath": "/tmp/wechat-image/img.png",
      "originalPath": "imgs/image.png"
    }
  ]
}

Example:
  npx -y bun md-to-wechat.ts article.md
  npx -y bun md-to-wechat.ts article.md --theme grace
  npx -y bun md-to-wechat.ts article.md --theme modern --color blue
`);
  process.exit(0);
}

async function main(): Promise<void> {
  const args = process.argv.slice(2);
  if (args.length === 0 || args.includes('--help') || args.includes('-h')) {
    printUsage();
  }

  let markdownPath: string | undefined;
  let title: string | undefined;
  let theme: string | undefined;
  let color: string | undefined;

  for (let i = 0; i < args.length; i++) {
    const arg = args[i]!;
    if (arg === '--title' && args[i + 1]) {
      title = args[++i];
    } else if (arg === '--theme' && args[i + 1]) {
      theme = args[++i];
    } else if (arg === '--color' && args[i + 1]) {
      color = args[++i];
    } else if (!arg.startsWith('-')) {
      markdownPath = arg;
    }
  }

  if (!markdownPath) {
    console.error('Error: Markdown file path is required');
    process.exit(1);
  }

  if (!fs.existsSync(markdownPath)) {
    console.error(`Error: File not found: ${markdownPath}`);
    process.exit(1);
  }

  const result = await convertMarkdown(markdownPath, { title, theme, color });
  console.log(JSON.stringify(result, null, 2));
}

await main().catch((err) => {
  console.error(`Error: ${err instanceof Error ? err.message : String(err)}`);
  process.exit(1);
});

import type { CliOptions, ThemeName } from "./types.js";
import {
  FONT_FAMILY_MAP,
  FONT_SIZE_OPTIONS,
  COLOR_PRESETS,
  CODE_BLOCK_THEMES,
} from "./constants.js";
import { THEME_NAMES } from "./themes.js";
import { loadExtendConfig } from "./extend-config.js";

export function printUsage(): void {
  console.error(
    [
      "Usage:",
      "  npx tsx src/md/render.ts <markdown_file> [options]",
      "",
      "Options:",
      `  --theme <name>        Theme (${THEME_NAMES.join(", ")})`,
      `  --color <name|hex>    Primary color: ${Object.keys(COLOR_PRESETS).join(", ")}, or hex`,
      `  --font-family <name>  Font: ${Object.keys(FONT_FAMILY_MAP).join(", ")}, or CSS value`,
      `  --font-size <N>       Font size: ${FONT_SIZE_OPTIONS.join(", ")} (default: 16px)`,
      `  --code-theme <name>   Code highlight theme (default: github)`,
      `  --mac-code-block      Show Mac-style code block header`,
      `  --line-number         Show line numbers in code blocks`,
      `  --cite                Enable footnote citations`,
      `  --count               Show reading time / word count`,
      `  --legend <value>      Image caption: title-alt, alt-title, title, alt, none`,
      `  --keep-title          Keep the first heading in output`,
    ].join("\n")
  );
}

function parseArgValue(argv: string[], i: number, flag: string): string | null {
  const arg = argv[i]!;
  if (arg.includes("=")) {
    return arg.slice(flag.length + 1);
  }
  const next = argv[i + 1];
  return next ?? null;
}

function resolveFontFamily(value: string): string {
  return FONT_FAMILY_MAP[value] ?? value;
}

function resolveColor(value: string): string {
  return COLOR_PRESETS[value] ?? value;
}

export function parseArgs(argv: string[]): CliOptions | null {
  const ext = loadExtendConfig();

  let inputPath = "";
  let theme: ThemeName = ext.default_theme ?? "default";
  let keepTitle = ext.keep_title ?? false;
  let primaryColor: string | undefined = ext.default_color ? resolveColor(ext.default_color) : undefined;
  let fontFamily: string | undefined = ext.default_font_family ? resolveFontFamily(ext.default_font_family) : undefined;
  let fontSize: string | undefined = ext.default_font_size ?? undefined;
  let codeTheme = ext.default_code_theme ?? "github";
  let isMacCodeBlock = ext.mac_code_block ?? true;
  let isShowLineNumber = ext.show_line_number ?? false;
  let citeStatus = ext.cite ?? false;
  let countStatus = ext.count ?? false;
  let legend = ext.legend ?? "alt";

  for (let i = 0; i < argv.length; i += 1) {
    const arg = argv[i]!;

    if (!arg.startsWith("--") && !inputPath) {
      inputPath = arg;
      continue;
    }

    if (arg === "--help" || arg === "-h") {
      return null;
    }

    if (arg === "--keep-title") { keepTitle = true; continue; }
    if (arg === "--mac-code-block") { isMacCodeBlock = true; continue; }
    if (arg === "--no-mac-code-block") { isMacCodeBlock = false; continue; }
    if (arg === "--line-number") { isShowLineNumber = true; continue; }
    if (arg === "--cite") { citeStatus = true; continue; }
    if (arg === "--count") { countStatus = true; continue; }

    if (arg === "--theme" || arg.startsWith("--theme=")) {
      const val = parseArgValue(argv, i, "--theme");
      if (!val) { console.error("Missing value for --theme"); return null; }
      theme = val as ThemeName;
      if (!arg.includes("=")) i += 1;
      continue;
    }

    if (arg === "--color" || arg.startsWith("--color=")) {
      const val = parseArgValue(argv, i, "--color");
      if (!val) { console.error("Missing value for --color"); return null; }
      primaryColor = resolveColor(val);
      if (!arg.includes("=")) i += 1;
      continue;
    }

    if (arg === "--font-family" || arg.startsWith("--font-family=")) {
      const val = parseArgValue(argv, i, "--font-family");
      if (!val) { console.error("Missing value for --font-family"); return null; }
      fontFamily = resolveFontFamily(val);
      if (!arg.includes("=")) i += 1;
      continue;
    }

    if (arg === "--font-size" || arg.startsWith("--font-size=")) {
      const val = parseArgValue(argv, i, "--font-size");
      if (!val) { console.error("Missing value for --font-size"); return null; }
      fontSize = val.endsWith("px") ? val : `${val}px`;
      if (!FONT_SIZE_OPTIONS.includes(fontSize)) {
        console.error(`Invalid font size: ${fontSize}. Valid: ${FONT_SIZE_OPTIONS.join(", ")}`);
        return null;
      }
      if (!arg.includes("=")) i += 1;
      continue;
    }

    if (arg === "--code-theme" || arg.startsWith("--code-theme=")) {
      const val = parseArgValue(argv, i, "--code-theme");
      if (!val) { console.error("Missing value for --code-theme"); return null; }
      codeTheme = val;
      if (!CODE_BLOCK_THEMES.includes(codeTheme)) {
        console.error(`Unknown code theme: ${codeTheme}`);
        return null;
      }
      if (!arg.includes("=")) i += 1;
      continue;
    }

    if (arg === "--legend" || arg.startsWith("--legend=")) {
      const val = parseArgValue(argv, i, "--legend");
      if (!val) { console.error("Missing value for --legend"); return null; }
      const valid = ["title-alt", "alt-title", "title", "alt", "none"];
      if (!valid.includes(val)) {
        console.error(`Invalid legend: ${val}. Valid: ${valid.join(", ")}`);
        return null;
      }
      legend = val;
      if (!arg.includes("=")) i += 1;
      continue;
    }

    console.error(`Unknown argument: ${arg}`);
    return null;
  }

  if (!inputPath) {
    return null;
  }

  if (!THEME_NAMES.includes(theme)) {
    console.error(`Unknown theme: ${theme}`);
    return null;
  }

  return {
    inputPath, theme, keepTitle, primaryColor, fontFamily, fontSize,
    codeTheme, isMacCodeBlock, isShowLineNumber, citeStatus, countStatus, legend,
  };
}