import { Injectable } from '@nestjs/common';
import { CommandBus, QueryBus } from '@nestjs/cqrs';
import { CommentReadModel } from '@task-stream/api/tracker/domain';
import { AddCommentCommand } from './commands/add-comment.command';
import { CommandResult } from './commands/command-result';
import { DeleteCommentCommand } from './commands/delete-comment.command';
import { EditCommentCommand } from './commands/edit-comment.command';
import { Page } from './ports/find-issues.repository';
import { GetCommentsQuery } from './queries/get-comments.query';

@Injectable()
export class CommentsService {
  constructor(
    private readonly commandBus: CommandBus,
    private readonly queryBus: QueryBus,
  ) {}

  add(actorId: string, issueId: string, body: string): Promise<CommandResult> {
    return this.commandBus.execute(
      new AddCommentCommand(actorId, issueId, body),
    );
  }

  edit(
    actorId: string,
    commentId: string,
    body: string,
  ): Promise<CommandResult> {
    return this.commandBus.execute(
      new EditCommentCommand(actorId, commentId, body),
    );
  }

  delete(actorId: string, commentId: string): Promise<CommandResult> {
    return this.commandBus.execute(
      new DeleteCommentCommand(actorId, commentId),
    );
  }

  list(
    viewerId: string | null,
    issueId: string,
    limit?: number,
    offset?: number,
  ): Promise<Page<CommentReadModel>> {
    return this.queryBus.execute(
      new GetCommentsQuery(viewerId, issueId, limit, offset),
    );
  }
}