import { RacesViewData, RacesRace } from '@/lib/view-data/races/RacesViewData';

/**
 * Races View Data Builder
 * 
 * Transforms API DTO into ViewData for the races template.
 * Deterministic, side-effect free.
 */
export class RacesViewDataBuilder {
  static build(apiDto: any): RacesViewData {
    const races = apiDto.races.map((race: any) => ({
      id: race.id,
      track: race.track,
      car: race.car,
      scheduledAt: race.scheduledAt,
      status: race.status as 'scheduled' | 'running' | 'completed' | 'cancelled',
      sessionType: 'race',
      leagueId: race.leagueId,
      leagueName: race.leagueName,
      strengthOfField: race.strengthOfField ?? undefined,
      isUpcoming: race.status === 'scheduled',
      isLive: race.status === 'running',
      isPast: race.status === 'completed',
    }));

    const totalCount = races.length;
    const scheduledRaces = races.filter((r: RacesRace) => r.isUpcoming);
    const runningRaces = races.filter((r: RacesRace) => r.isLive);
    const completedRaces = races.filter((r: RacesRace) => r.isPast);

    return {
      races,
      totalCount,
      scheduledRaces,
      runningRaces,
      completedRaces,
    };
  }
}