import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
import type { IRankingService } from '../../domain/services/IRankingService';
import type { IDriverStatsService } from '../../domain/services/IDriverStatsService';
import type { IImageServicePort } from '../ports/IImageServicePort';
import type {
  IDriversLeaderboardPresenter,
  DriversLeaderboardResultDTO,
  DriversLeaderboardViewModel,
} from '../presenters/IDriversLeaderboardPresenter';
import type { UseCase } from '@gridpilot/shared/application/UseCase';

/**
 * Use Case for retrieving driver leaderboard data.
 * Orchestrates domain logic and delegates presentation to the presenter.
 */
export class GetDriversLeaderboardUseCase
  implements UseCase<void, DriversLeaderboardResultDTO, DriversLeaderboardViewModel, IDriversLeaderboardPresenter>
{
  constructor(
    private readonly driverRepository: IDriverRepository,
    private readonly rankingService: IRankingService,
    private readonly driverStatsService: IDriverStatsService,
    private readonly imageService: IImageServicePort,
  ) {}

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

    const drivers = await this.driverRepository.findAll();
    const rankings = this.rankingService.getAllDriverRankings();

    const stats: DriversLeaderboardResultDTO['stats'] = {};
    const avatarUrls: DriversLeaderboardResultDTO['avatarUrls'] = {};

    for (const driver of drivers) {
      const driverStats = this.driverStatsService.getDriverStats(driver.id);
      if (driverStats) {
        stats[driver.id] = driverStats;
      }
      avatarUrls[driver.id] = this.imageService.getDriverAvatar(driver.id);
    }

    const dto: DriversLeaderboardResultDTO = {
      drivers,
      rankings,
      stats,
      avatarUrls,
    };

    presenter.present(dto);
  }
}