import type { IRaceRegistrationRepository } from '@gridpilot/racing/domain/repositories/IRaceRegistrationRepository';
import type { WithdrawFromRaceCommandDTO } from '../dto/WithdrawFromRaceCommandDTO';

/**
 * Mirrors legacy withdrawFromRace behavior:
 * - throws when driver is not registered
 * - removes registration and cleans up empty race sets
 *
 * The repository encapsulates the in-memory or persistent details.
 */
export class WithdrawFromRaceUseCase {
  constructor(
    private readonly registrationRepository: IRaceRegistrationRepository,
  ) {}

  async execute(command: WithdrawFromRaceCommandDTO): Promise<void> {
    const { raceId, driverId } = command;

    // Let repository enforce "not registered" error behavior to match legacy logic.
    await this.registrationRepository.withdraw(raceId, driverId);
  }
}