import type { ITeamRepository } from '../../domain/repositories/ITeamRepository';
import type { ITeamMembershipRepository } from '../../domain/repositories/ITeamMembershipRepository';
import type { Logger } from '@core/shared/application';
import { Result } from '@core/shared/application/Result';
import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
import type { UseCaseOutputPort } from '@core/shared/application/UseCaseOutputPort';

export type GetAllTeamsInput = {};

export type GetAllTeamsErrorCode = 'REPOSITORY_ERROR';

export interface TeamSummary {
  id: string;
  name: string;
  tag: string;
  description: string;
  ownerId: string;
  leagues: string[];
  createdAt: Date;
  memberCount: number;
}

export interface GetAllTeamsResult {
  teams: TeamSummary[];
  totalCount: number;
}

/**
 * Use Case for retrieving all teams.
 */
export class GetAllTeamsUseCase {
  constructor(
    private readonly teamRepository: ITeamRepository,
    private readonly teamMembershipRepository: ITeamMembershipRepository,
    private readonly logger: Logger,
    private readonly output: UseCaseOutputPort<GetAllTeamsResult>,
  ) {}

  async execute(
    _input: GetAllTeamsInput = {},
  ): Promise<Result<void, ApplicationErrorCode<GetAllTeamsErrorCode, { message: string }>>> {
    this.logger.debug('Executing GetAllTeamsUseCase');

    try {
      const teams = await this.teamRepository.findAll();

      const enrichedTeams: TeamSummary[] = await Promise.all(
        teams.map(async (team) => {
          const memberCount = await this.teamMembershipRepository.countByTeamId(team.id);
          return {
            id: team.id,
            name: team.name.props,
            tag: team.tag.props,
            description: team.description.props,
            ownerId: team.ownerId.toString(),
            leagues: team.leagues.map(l => l.toString()),
            createdAt: team.createdAt.toDate(),
            memberCount,
          };
        }),
      );

      const result: GetAllTeamsResult = {
        teams: enrichedTeams,
        totalCount: enrichedTeams.length,
      };

      this.logger.debug('Successfully retrieved all teams.');
      this.output.present(result);

      return Result.ok(undefined);
    } catch (error) {
      this.logger.error('Error retrieving all teams', error instanceof Error ? error : new Error(String(error)));
      return Result.err({
        code: 'REPOSITORY_ERROR',
        details: { message: error instanceof Error ? error.message : 'Failed to load teams' },
      });
    }
  }
}