import {
  CODE_RELATION_FIELDS,
  DEFAULT_RELATION_FIELDS,
  pickCodeRelation,
  pickDefaultRelation,
  pickRelation,
  pickUserRelation,
  USER_RELATION_FIELDS,
} from './relation-fields';

describe('pickRelation', () => {
  const catalog = {
    id: 'div-1',
    code: 'JKT',
    name: 'Jakarta',
    status: 'active',
    extra: 'secret',
  };

  const user = {
    id: 'user-1',
    username: 'admin',
    passwordHash: 'hashed',
  };

  it('picks default id, code, name fields', () => {
    expect(pickRelation(catalog, DEFAULT_RELATION_FIELDS)).toEqual({
      id: 'div-1',
      code: 'JKT',
      name: 'Jakarta',
    });
  });

  it('picks a custom field list for users', () => {
    expect(pickRelation(user, USER_RELATION_FIELDS)).toEqual({
      id: 'user-1',
      username: 'admin',
    });
  });

  it('returns null for null or undefined sources', () => {
    const missing: typeof catalog | null = null;
    const unset: typeof catalog | undefined = undefined;
    expect(
      pickRelation<typeof catalog, (typeof DEFAULT_RELATION_FIELDS)[number]>(
        missing,
        DEFAULT_RELATION_FIELDS,
      ),
    ).toBeNull();
    expect(
      pickRelation<typeof catalog, (typeof DEFAULT_RELATION_FIELDS)[number]>(
        unset,
        DEFAULT_RELATION_FIELDS,
      ),
    ).toBeNull();
  });

  it('does not copy fields outside the list', () => {
    const picked = pickRelation(catalog, DEFAULT_RELATION_FIELDS);
    expect(picked).not.toHaveProperty('status');
    expect(picked).not.toHaveProperty('extra');
  });
});

describe('pickCodeRelation', () => {
  it('picks id and code only', () => {
    expect(
      pickCodeRelation({
        id: 'so-1',
        code: 'SO-001',
      }),
    ).toEqual({ id: 'so-1', code: 'SO-001' });
    expect(CODE_RELATION_FIELDS).toEqual(['id', 'code']);
    expect(pickCodeRelation(null)).toBeNull();
  });
});

describe('pickDefaultRelation / pickUserRelation', () => {
  it('maps catalog and user sources without leaking extra fields', () => {
    expect(
      pickDefaultRelation({
        id: 'div-1',
        code: 'JKT',
        name: 'Jakarta',
      }),
    ).toEqual({ id: 'div-1', code: 'JKT', name: 'Jakarta' });
    expect(pickDefaultRelation(null)).toBeNull();
    expect(pickUserRelation({ id: 'user-1', username: 'admin' })).toEqual({
      id: 'user-1',
      username: 'admin',
    });
  });
});