import {
  describe,
  expect,
  it
} from 'vitest';

import { buildAttachmentExportFileName } from './attachment-export.rules';

describe('buildAttachmentExportFileName', () => {
  it('appends the timestamp before the extension so exports never collide', () => {
    expect(buildAttachmentExportFileName('report.pdf', 1_720_900_000_000)).toBe('report-1720900000000.pdf');
  });

  it('appends the timestamp at the end when there is no extension', () => {
    expect(buildAttachmentExportFileName('README', 42)).toBe('README-42');
  });

  it('keeps dotfiles intact instead of treating the leading dot as an extension', () => {
    expect(buildAttachmentExportFileName('.env', 42)).toBe('.env-42');
  });

  it('strips directory components from the filename', () => {
    expect(buildAttachmentExportFileName('../secret/../../etc/passwd.txt', 7)).toBe('passwd-7.txt');
    expect(buildAttachmentExportFileName('folder\\file.bin', 7)).toBe('file-7.bin');
  });

  it('falls back to a generic name when the filename is empty after sanitising', () => {
    expect(buildAttachmentExportFileName('   ', 7)).toBe('attachment-7');
    expect(buildAttachmentExportFileName('a/b/', 7)).toBe('attachment-7');
  });
});