import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
import type { ITotalDriversPresenter, TotalDriversResultDTO } from '../presenters/ITotalDriversPresenter';
import type { UseCase } from '@core/shared/application/UseCase';

/**
 * Use Case for retrieving total number of drivers.
 */
export class GetTotalDriversUseCase
  implements UseCase<void, TotalDriversResultDTO, any, ITotalDriversPresenter>
{
  constructor(private readonly driverRepository: IDriverRepository) {}

  async execute(_input: void, presenter: ITotalDriversPresenter): Promise<void> {
    presenter.reset();

    const drivers = await this.driverRepository.findAll();
    const dto: TotalDriversResultDTO = {
      totalDrivers: drivers.length,
    };

    presenter.present(dto);
  }
}