import { describe, it, expect, beforeEach } from 'vitest';
import { register, resolve, listTargetFormats, _resetForTests } from '../../src/converters/registry.js';

beforeEach(() => {
  _resetForTests();
});

describe('converter registry', () => {
  it('resolves a registered source/target pair', () => {
    const convert = async () => {};
    register({ family: 'image', sourceFormat: 'png', targetFormat: 'webp', convert });

    const entry = resolve('png', 'webp');

    expect(entry.family).toBe('image');
    expect(entry.convert).toBe(convert);
  });

  it('returns null for an unregistered pair', () => {
    expect(resolve('png', 'made-up')).toBeNull();
  });

  it('lists all target formats registered for a source format', () => {
    register({ family: 'image', sourceFormat: 'png', targetFormat: 'webp', convert: async () => {} });
    register({ family: 'image', sourceFormat: 'png', targetFormat: 'jpg', convert: async () => {} });
    register({ family: 'document', sourceFormat: 'docx', targetFormat: 'pdf', convert: async () => {} });

    expect(listTargetFormats('png').sort()).toEqual(['jpg', 'webp']);
    expect(listTargetFormats('docx')).toEqual(['pdf']);
    expect(listTargetFormats('unknown-format')).toEqual([]);
  });
});