jest.mock('../../server/lib/postgres', () => ({
  get: jest.fn(),
  run: jest.fn(),
}));

const { get, run } = require('../../server/lib/postgres');
const { deleteAccount, signUp } = require('../../server/lib/auth');

describe('server auth account deletion', () => {
  beforeEach(() => {
    jest.clearAllMocks();
    get.mockResolvedValue(null);
    run.mockResolvedValue({ lastId: null, changes: 1, rows: [] });
  });

  it('removes auth and billing rows so the same email can sign up again', async () => {
    const email = 'same@example.com';

    await signUp({}, email, 'First User', 'password-1');
    await deleteAccount({}, 'usr_deleted');
    await signUp({}, email, 'Second User', 'password-2');

    const authDeletes = run.mock.calls.filter(([, sql]) => (
      typeof sql === 'string' && sql.includes('DELETE FROM auth_users')
    ));
    expect(authDeletes).toHaveLength(1);

    const billingAccountDeletes = run.mock.calls.filter(([, sql]) => (
      typeof sql === 'string' && sql.includes('DELETE FROM billing_accounts')
    ));
    expect(billingAccountDeletes).toHaveLength(1);

    const signupChecks = get.mock.calls.filter(([, sql], params) => (
      typeof sql === 'string'
      && sql.includes('SELECT id FROM auth_users WHERE LOWER(email)')
      && params?.[0] === email
    ));
    expect(signupChecks).toHaveLength(2);
  });
});