import { Inject, Injectable } from '@nestjs/common';
import { ISSUE_REPOSITORY, type IIssueRepository } from '../../../domain/repositories/issue.repository.interface.js';
import { IssueNotFoundException } from '../../../domain/exceptions/issue-not-found.exception.js';
import { GetIssueQuery } from './get-issue.query.js';
import { IssueWithUsersDto } from '../../dto/issue-with-users.dto.js';
import { IssueUserExpanderService } from '../../services/issue-user-expander.service.js';

@Injectable()
export class GetIssueUseCase {
  constructor(
    @Inject(ISSUE_REPOSITORY)
    private readonly issueRepository: IIssueRepository,
    private readonly issueUserExpander: IssueUserExpanderService,
  ) {}

  async execute(query: GetIssueQuery): Promise<IssueWithUsersDto> {
    const issue = await this.issueRepository.findById(query.id, query.userId);

    if (!issue) {
      throw new IssueNotFoundException(query.id);
    }

    return this.issueUserExpander.expand(issue);
  }
}