/**
 * 将邮�?/4 子目录内业务附件平铺到邮件根目录�? * 用法: pnpm exec tsx scripts/flatten-mail-attachments.ts
 */
import fs from "fs/promises";
import path from "path";

const MAIL_ROOT = path.join(process.cwd(), "docx", "邮件");

async function exists(p: string): Promise<boolean> {
  try {
    await fs.access(p);
    return true;
  } catch {
    return false;
  }
}

async function moveUp(subdir: string, mailDir: string): Promise<string[]> {
  const moved: string[] = [];
  if (!(await exists(subdir))) return moved;
  const entries = await fs.readdir(subdir, { withFileTypes: true });
  for (const e of entries) {
    if (!e.isFile()) continue;
    const src = path.join(subdir, e.name);
    const dest = path.join(mailDir, e.name);
    if (await exists(dest)) {
      // 同名已在根：删子目录副本
      await fs.unlink(src);
      moved.push(`${e.name} (root exists, removed nested)`);
      continue;
    }
    await fs.rename(src, dest);
    moved.push(e.name);
  }
  // 清空后删子目�?  const left = await fs.readdir(subdir);
  if (!left.length) await fs.rmdir(subdir);
  return moved;
}

async function main() {
  const ops: Array<{ mail: string; nested: string }> = [
    { mail: "邮件3", nested: "WHSU5574991 卡转�? },
    {
      mail: "邮件4",
      nested: "原箱号YT2604021091=FBA199R49LD6-MDW2=76件换标操作指�?,
    },
  ];

  for (const op of ops) {
    const mailDir = path.join(MAIL_ROOT, op.mail);
    const nested = path.join(mailDir, op.nested);
    const moved = await moveUp(nested, mailDir);
    console.log(
      JSON.stringify({ mail: op.mail, nested: op.nested, moved }, null, 2),
    );
  }
}

main().catch((e) => {
  console.error(e);
  process.exitCode = 1;
});