import { CommandHandler, EventPublisher, ICommandHandler } from '@nestjs/cqrs';
import { CommentFactory } from '@task-stream/api/tracker/domain';
import { AddCommentCommand } from './add-comment.command';
import { CommandResult, ack } from './command-result';
import { WriteAccess } from './write-access';

@CommandHandler(AddCommentCommand)
export class AddCommentCommandHandler
  implements ICommandHandler<AddCommentCommand>
{
  constructor(
    private readonly access: WriteAccess,
    private readonly commentFactory: CommentFactory,
    private readonly eventPublisher: EventPublisher,
  ) {}

  async execute(command: AddCommentCommand): Promise<CommandResult> {
    const { issue } = await this.access.issueForContributor(
      command.issueId,
      command.actorId,
    );
    const comment = this.commentFactory.create({
      issueId: issue.id,
      projectId: issue.projectId,
      authorId: command.actorId,
      body: command.body,
    });

    this.eventPublisher.mergeObjectContext(comment);
    await comment.commitAndWait();
    return ack(comment);
  }
}