import { BadRequestException, ValidationPipe } from '@nestjs/common';

import { CredentialsDto } from '../modules/auth/presentation/auth.dto';
import {
  CreateBankCardDto,
  UpdateBankCardDto,
} from '../modules/banking/bank-cards/presentation/bank-card.dto';

describe('DTO validation', () => {
  const pipe = new ValidationPipe({
    forbidUnknownValues: true, transform: true, whitelist: true });

  it('requires credentials and normalizes a valid email', async () => {
    const metadata = { type: 'body' as const, metatype: CredentialsDto };
    await expect(pipe.transform({}, metadata)).rejects.toBeInstanceOf(
      BadRequestException,
    );
    await expect(
      pipe.transform({ email: 'user@example.com' }, metadata),
    ).rejects.toBeInstanceOf(BadRequestException);
    await expect(
      pipe.transform(
        { email: ' User@Example.com ', password: 'long-enough-password' },
        metadata,
      ),
    ).resolves.toEqual({
      email: 'user@example.com',
      password: 'long-enough-password',
    });
  });

  it('requires and validates nested money in a new card', async () => {
    const metadata = { type: 'body' as const, metatype: CreateBankCardDto };
    const card = {
      id: '00000000-0000-4000-8000-000000000001',
      name: 'Everyday',
      openingDate: '2026-09-13',
    };
    for (const openingBalance of [undefined, null, {}, { currency: 'RUB' }]) {
      await expect(
        pipe.transform({ ...card, openingBalance }, metadata),
      ).rejects.toBeInstanceOf(BadRequestException);
    }
    const valid = {
      ...card,
      openingBalance: { currency: 'RUB', value: '100.00' },
    };
    await expect(pipe.transform(valid, metadata)).resolves.toEqual(valid);
  });

  it('keeps update fields optional while requiring version and rejecting null', async () => {
    const metadata = { type: 'body' as const, metatype: UpdateBankCardDto };
    await expect(pipe.transform({}, metadata)).rejects.toBeInstanceOf(
      BadRequestException,
    );
    await expect(
      pipe.transform({ version: 1, name: null }, metadata),
    ).rejects.toBeInstanceOf(BadRequestException);
    await expect(
      pipe.transform({ version: 1 }, metadata),
    ).resolves.toMatchObject({ version: 1 });
  });
});