import { Result } from '@/lib/contracts/Result';
import { PageQuery } from '@/lib/contracts/page-queries/PageQuery';
import { PresentationError, mapToPresentationError } from '@/lib/contracts/page-queries/PresentationError';
import { RacesViewData } from '@/lib/view-data/RacesViewData';
import { RacesService } from '@/lib/services/races/RacesService';
import { RacesViewDataBuilder } from '@/lib/builders/view-data/RacesViewDataBuilder';

/**
 * Races Page Query
 * 
 * Fetches races data for the main races page.
 * Returns Result<RacesViewData, PresentationError>
 */
export class RacesPageQuery implements PageQuery<RacesViewData, void> {
  async execute(): Promise<Result<RacesViewData, PresentationError>> {
    try {
      // Manual wiring: Service creates its own dependencies
      const service = new RacesService();
      
      // Get races data
      const result = await service.getRacesPageData();
      
      if (result.isErr()) {
        return Result.err(mapToPresentationError(result.getError()));
      }
      
      // Transform to ViewData using builder
      const viewData = RacesViewDataBuilder.build(result.unwrap());
      return Result.ok(viewData);
    } catch (error: unknown) {
      const message = error instanceof Error ? error.message : 'Failed to execute races page query';
      return Result.err(message as PresentationError);
    }
  }
}