import type { IRaceRepository } from '../../domain/repositories/IRaceRepository';
import type { ILeagueRepository } from '../../domain/repositories/ILeagueRepository';
import type { IResultRepository } from '../../domain/repositories/IResultRepository';
import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
import type { IPenaltyRepository } from '../../domain/repositories/IPenaltyRepository';
import type {
  IRaceResultsDetailPresenter,
  RaceResultsDetailViewModel,
  RaceResultsPenaltySummaryViewModel,
} from '../presenters/IRaceResultsDetailPresenter';
import type { UseCase } from '@gridpilot/shared/application/UseCase';
import type { League } from '../../domain/entities/League';
import type { Result } from '../../domain/entities/Result';
import type { Driver } from '../../domain/entities/Driver';
import type { Penalty } from '../../domain/entities/Penalty';

export interface GetRaceResultsDetailParams {
  raceId: string;
  driverId?: string;
}

function buildPointsSystem(league: League | null): Record<number, number> | undefined {
  if (!league) return undefined;

  const pointsSystems: Record<string, Record<number, number>> = {
    'f1-2024': {
      1: 25,
      2: 18,
      3: 15,
      4: 12,
      5: 10,
      6: 8,
      7: 6,
      8: 4,
      9: 2,
      10: 1,
    },
    indycar: {
      1: 50,
      2: 40,
      3: 35,
      4: 32,
      5: 30,
      6: 28,
      7: 26,
      8: 24,
      9: 22,
      10: 20,
      11: 19,
      12: 18,
      13: 17,
      14: 16,
      15: 15,
    },
  };

  const customPoints = league.settings.customPoints;
  if (customPoints) {
    return customPoints;
  }

  const preset = pointsSystems[league.settings.pointsSystem];
  if (preset) {
    return preset;
  }

  return pointsSystems['f1-2024'];
}

function getFastestLapTime(results: Result[]): number | undefined {
  if (results.length === 0) return undefined;
  return Math.min(...results.map((r) => r.fastestLap));
}

function mapPenaltySummary(penalties: Penalty[]): RaceResultsPenaltySummaryViewModel[] {
  return penalties.map((p) => ({
    driverId: p.driverId,
    type: p.type,
    ...(p.value !== undefined ? { value: p.value } : {}),
  }));
}

export class GetRaceResultsDetailUseCase
  implements
    UseCase<
      GetRaceResultsDetailParams,
      RaceResultsDetailViewModel,
      RaceResultsDetailViewModel,
      IRaceResultsDetailPresenter
    >
{
  constructor(
    private readonly raceRepository: IRaceRepository,
    private readonly leagueRepository: ILeagueRepository,
    private readonly resultRepository: IResultRepository,
    private readonly driverRepository: IDriverRepository,
    private readonly penaltyRepository: IPenaltyRepository,
  ) {}

  async execute(
    params: GetRaceResultsDetailParams,
    presenter: IRaceResultsDetailPresenter,
  ): Promise<void> {
    presenter.reset();
    const { raceId, driverId } = params;

    const race = await this.raceRepository.findById(raceId);

    if (!race) {
      const errorViewModel: RaceResultsDetailViewModel = {
        race: null,
        league: null,
        results: [],
        drivers: [],
        penalties: [],
        ...(driverId ? { currentDriverId: driverId } : {}),
        error: 'Race not found',
      };
      presenter.present(errorViewModel);
      return;
    }

    const [league, results, drivers, penalties] = await Promise.all([
      this.leagueRepository.findById(race.leagueId),
      this.resultRepository.findByRaceId(raceId),
      this.driverRepository.findAll(),
      this.penaltyRepository.findByRaceId(raceId),
    ]);

    const effectiveCurrentDriverId =
      driverId ?? (drivers.length > 0 ? drivers[0]!.id : undefined);

    const pointsSystem = buildPointsSystem(league as League | null);
    const fastestLapTime = getFastestLapTime(results);
    const penaltySummary = mapPenaltySummary(penalties);

    const viewModel: RaceResultsDetailViewModel = {
      race: {
        id: race.id,
        leagueId: race.leagueId,
        track: race.track,
        scheduledAt: race.scheduledAt,
        status: race.status,
      },
      league: league
        ? {
            id: league.id,
            name: league.name,
          }
        : null,
      results,
      drivers,
      penalties: penaltySummary,
      ...(pointsSystem ? { pointsSystem } : {}),
      ...(fastestLapTime !== undefined ? { fastestLapTime } : {}),
      ...(effectiveCurrentDriverId ? { currentDriverId: effectiveCurrentDriverId } : {}),
    };

    presenter.present(viewModel);
  }
}