import { describe, it, expect, beforeEach, vi, Mock } from 'vitest';
import { GetLeagueAdminUseCase } from './GetLeagueAdminUseCase';
import type { ILeagueRepository } from '../../domain/repositories/ILeagueRepository';
import type { GetLeagueAdminUseCaseParams } from './GetLeagueAdminUseCaseParams';
import { RacingDomainValidationError } from '../../domain/errors/RacingDomainError';

describe('GetLeagueAdminUseCase', () => {
  let mockLeagueRepo: { findById: Mock };

  beforeEach(() => {
    mockLeagueRepo = { findById: vi.fn() };
  });

  const createUseCase = () => new GetLeagueAdminUseCase(
    mockLeagueRepo as unknown as ILeagueRepository,
  );

  const params: GetLeagueAdminUseCaseParams = {
    leagueId: 'league1',
  };

  it('should return error when league not found', async () => {
    mockLeagueRepo.findById.mockResolvedValue(null);

    const useCase = createUseCase();
    const result = await useCase.execute(params);

    expect(result.isErr()).toBe(true);
    expect(result.unwrapErr()).toBeInstanceOf(RacingDomainValidationError);
    expect(result.unwrapErr().message).toBe('League not found');
  });

  it('should return league data when league found', async () => {
    const league = { id: 'league1', ownerId: 'owner1' };
    mockLeagueRepo.findById.mockResolvedValue(league);

    const useCase = createUseCase();
    const result = await useCase.execute(params);

    expect(result.isOk()).toBe(true);
    expect(result.value).toEqual({
      league: {
        id: 'league1',
        ownerId: 'owner1',
      },
    });
  });
});