import { IQueryHandler, QueryHandler } from '@nestjs/cqrs';
import { EpicReadModel } from '@task-stream/api/tracker/domain';
import { FindIssuesRepository } from '../ports/find-issues.repository';
import { GetEpicsQuery } from './get-epics.query';
import { ReadAccess } from './read-access';

@QueryHandler(GetEpicsQuery)
export class GetEpicsQueryHandler
  implements IQueryHandler<GetEpicsQuery, EpicReadModel[]>
{
  constructor(
    private readonly findIssues: FindIssuesRepository,
    private readonly access: ReadAccess,
  ) {}

  async execute(query: GetEpicsQuery): Promise<EpicReadModel[]> {
    await this.access.assertSeesWholeProject(query.projectId, query.viewerId);
    return this.findIssues.epics(query.projectId);
  }
}