import assert from 'node:assert/strict';
import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import test from 'node:test';

import { ensureParentDir } from './ensureParentDir';

void test('ensureParentDir: creates nested parent', async () => {
  const root = await fs.mkdtemp(path.join(os.tmpdir(), 'dnd-mkdir-'));
  try {
    const file = path.join(root, 'a', 'b', 'out.ttrpg.zip');
    await ensureParentDir(file);
    const st = await fs.stat(path.dirname(file));
    assert.equal(st.isDirectory(), true);
  } finally {
    await fs.rm(root, { recursive: true, force: true });
  }
});

void test('ensureParentDir: drive root is a no-op (Windows)', async () => {
  if (process.platform !== 'win32') return;
  // Must not throw EPERM the way fs.mkdir('E:\\') often does.
  await ensureParentDir('E:\\campaign.ttrpg.zip');
  await ensureParentDir('C:\\file.ttrpg.zip');
});