import { IUseCase } from '../../core/application/IUseCase';
import { Result } from '../../core/domain/Result';
import { DomainError, ValidationError } from '../../core/domain/DomainError';
import { IListRepository } from '../domain/IListRepository';
import { NoteList } from '../domain/NoteList';

export interface GetListsRequest {
  ownerId: string;
  category?: string;
}

export class GetListsUseCase implements IUseCase<GetListsRequest, NoteList[]> {
  constructor(private readonly listRepository: IListRepository) {}

  public async execute(req: GetListsRequest): Promise<Result<NoteList[], DomainError>> {
    if (!req.ownerId) {
      return Result.fail(new ValidationError('Owner ID is required'));
    }

    const lists = await this.listRepository.findListsByOwner(req.ownerId, req.category);
    return Result.ok(lists);
  }
}