import type { LeagueScheduleDTO } from '@/lib/types/generated/LeagueScheduleDTO';
import type { LeagueSeasonSummaryDTO } from '@/lib/types/generated/LeagueSeasonSummaryDTO';
import type { LeagueScheduleViewData, ScheduleRaceData } from '@/lib/view-data/LeagueScheduleViewData';

/**
 * LeagueScheduleViewDataBuilder
 *
 * Transforms API DTOs into LeagueScheduleViewData for server-side rendering.
 * Deterministic; side-effect free; no HTTP calls.
 */
export class LeagueScheduleViewDataBuilder {
  static build(input: {
    schedule: LeagueScheduleDTO;
    seasons: LeagueSeasonSummaryDTO[];
    leagueId: string;
  }): LeagueScheduleViewData {
    const { schedule, seasons, leagueId } = input;
    
    // Transform races - using available fields from RaceDTO
    const races: ScheduleRaceData[] = (schedule.races || []).map(race => ({
      id: race.id,
      name: race.name,
      track: race.leagueName || 'Unknown Track',
      car: 'Unknown Car',
      scheduledAt: race.date,
      status: 'scheduled',
    }));
    
    return {
      leagueId,
      races,
      seasons: seasons.map(s => ({
        seasonId: s.seasonId,
        name: s.name,
        status: s.status,
      })),
    };
  }
}