import 'reflect-metadata';
import { plainToInstance } from 'class-transformer';
import { validate } from 'class-validator';
import { describe, expect, it } from 'vitest';
import { CreateCustomModuleDto, UpdateCustomModuleDto } from './custom-module.dto';

async function errorsFor<T extends object>(cls: new () => T, plain: Record<string, unknown>) {
  const dto = plainToInstance(cls, plain);
  const errors = await validate(dto as object);
  return errors.map((e) => e.property);
}

const valid = { name: 'Wiki', url: 'https://example.com', category: 'infrastructure' };

describe('CreateCustomModuleDto', () => {
  it('nimmt einen gueltigen Eintrag an', async () => {
    expect(await errorsFor(CreateCustomModuleDto, valid)).toEqual([]);
  });

  it.each([
    'http://example.com',
    'javascript:alert(1)',
    'data:text/html,x',
    'ftp://x',
    'kaputt',
    'https://user:pw@example.com',
    'https://user@example.com',
  ])('lehnt die Adresse %s ab', async (url) => {
    expect(await errorsFor(CreateCustomModuleDto, { ...valid, url })).toContain('url');
  });

  it('lehnt eine unbekannte Kategorie ab', async () => {
    expect(await errorsFor(CreateCustomModuleDto, { ...valid, category: 'other' })).toContain(
      'category',
    );
  });

  it.each(['', '   '])('lehnt den Namen %j ab', async (name) => {
    expect(await errorsFor(CreateCustomModuleDto, { ...valid, name })).toContain('name');
  });

  it('trimmt den Namen', () => {
    const dto = plainToInstance(CreateCustomModuleDto, { ...valid, name: '  Wiki  ' });
    expect(dto.name).toBe('Wiki');
  });

  it('lehnt zu lange Namen und Adressen ab', async () => {
    expect(await errorsFor(CreateCustomModuleDto, { ...valid, name: 'a'.repeat(101) })).toContain(
      'name',
    );
    const longUrl = `https://example.com/${'a'.repeat(2048)}`;
    expect(await errorsFor(CreateCustomModuleDto, { ...valid, url: longUrl })).toContain('url');
  });
});

describe('UpdateCustomModuleDto', () => {
  it('akzeptiert Teilmengen', async () => {
    expect(await errorsFor(UpdateCustomModuleDto, { name: 'Neu' })).toEqual([]);
    expect(await errorsFor(UpdateCustomModuleDto, {})).toEqual([]);
  });

  it('prueft jedes gesetzte Feld gleich', async () => {
    expect(await errorsFor(UpdateCustomModuleDto, { url: 'http://example.com' })).toContain('url');
    expect(await errorsFor(UpdateCustomModuleDto, { category: 'other' })).toContain('category');
    expect(await errorsFor(UpdateCustomModuleDto, { name: ' ' })).toContain('name');
  });

  it.each([
    'name',
    'url',
    'category',
  ])('lehnt %s: null ab statt es durchzulassen', async (field) => {
    expect(await errorsFor(UpdateCustomModuleDto, { [field]: null })).toContain(field);
  });
});