import { Result } from '@/lib/contracts/Result';
import { Service, type DomainError } from '@/lib/contracts/services/Service';
import { type LeagueSettingsApiDto } from '@/lib/types/tbd/LeagueSettingsApiDto';

export class LeagueSettingsService implements Service {
  private static cachedMemberships = new Map<string, unknown[]>();

  async getSettingsData(leagueId: string): Promise<Result<LeagueSettingsApiDto, DomainError>> {
    // Mock data since backend not implemented
    const mockData: LeagueSettingsApiDto = {
      leagueId,
      league: {
        id: leagueId,
        name: 'Mock League',
        description: 'A mock league for demonstration',
        visibility: 'public',
        ownerId: 'owner-123',
        createdAt: '2024-01-01T00:00:00Z',
        updatedAt: '2024-01-01T00:00:00Z',
      },
      config: {
        maxDrivers: 20,
        scoringPresetId: 'preset-1',
        allowLateJoin: true,
        requireApproval: false,
      },
    };
    return Result.ok(mockData);
  }

  static getCachedMembershipsIterator(): IterableIterator<[string, unknown[]]> {
    return this.cachedMemberships.entries();
  }

  static getMembership(leagueId: string, driverId: string): unknown | null {
    const members = this.cachedMemberships.get(leagueId);
    if (!members) return null;
    return members.find((m: any) => m.driverId === driverId) || null;
  }
}