import { Result, ok, err } from '../../../../../shared/core/Result';
import { BaseUseCase } from '../../../../../shared/core/UseCase';
import { UseCaseError } from '../../../../../shared/core/UseCaseError';
import { AppError } from '../../../../../shared/core/AppError';
import { IEventPublisher } from '../../../../../shared/application/events/IEventPublisher';
import { ICardRepository } from '../../../domain/ICardRepository';
import { ICollectionRepository } from '../../../domain/ICollectionRepository';
import { CardId } from '../../../domain/value-objects/CardId';
import { CollectionId } from '../../../domain/value-objects/CollectionId';
import { CuratorId } from '../../../domain/value-objects/CuratorId';
import { CardCollectionService } from '../../../domain/services/CardCollectionService';

export interface AddCardToCollectionDTO {
  cardId: string;
  collectionIds: string[];
  curatorId: string;
}

export interface AddCardToCollectionResponseDTO {
  cardId: string;
}

export class ValidationError extends UseCaseError {
  constructor(message: string) {
    super(message);
  }
}

export class AddCardToCollectionUseCase extends BaseUseCase<
  AddCardToCollectionDTO,
  Result<
    AddCardToCollectionResponseDTO,
    ValidationError | AppError.UnexpectedError
  >
> {
  constructor(
    private cardRepository: ICardRepository,
    private cardCollectionService: CardCollectionService,
    eventPublisher: IEventPublisher,
  ) {
    super(eventPublisher);
  }

  async execute(
    request: AddCardToCollectionDTO,
  ): Promise<
    Result<
      AddCardToCollectionResponseDTO,
      ValidationError | AppError.UnexpectedError
    >
  > {
    try {
      // Validate and create CuratorId
      const curatorIdResult = CuratorId.create(request.curatorId);
      if (curatorIdResult.isErr()) {
        return err(
          new ValidationError(
            `Invalid curator ID: ${curatorIdResult.error.message}`,
          ),
        );
      }
      const curatorId = curatorIdResult.value;

      // Validate and create CardId
      const cardIdResult = CardId.createFromString(request.cardId);
      if (cardIdResult.isErr()) {
        return err(
          new ValidationError(`Invalid card ID: ${cardIdResult.error.message}`),
        );
      }
      const cardId = cardIdResult.value;

      // Validate and create CollectionIds
      const collectionIds: CollectionId[] = [];
      for (const collectionIdStr of request.collectionIds) {
        const collectionIdResult =
          CollectionId.createFromString(collectionIdStr);
        if (collectionIdResult.isErr()) {
          return err(
            new ValidationError(
              `Invalid collection ID: ${collectionIdResult.error.message}`,
            ),
          );
        }
        collectionIds.push(collectionIdResult.value);
      }

      // Find the card
      const cardResult = await this.cardRepository.findById(cardId);
      if (cardResult.isErr()) {
        return err(AppError.UnexpectedError.create(cardResult.error));
      }

      const card = cardResult.value;
      if (!card) {
        return err(new ValidationError(`Card not found: ${request.cardId}`));
      }

      // Add card to collections using domain service
      const addToCollectionsResult =
        await this.cardCollectionService.addCardToCollections(
          card,
          collectionIds,
          curatorId,
        );
      if (addToCollectionsResult.isErr()) {
        if (addToCollectionsResult.error instanceof AppError.UnexpectedError) {
          return err(addToCollectionsResult.error);
        }
        return err(new ValidationError(addToCollectionsResult.error.message));
      }

      // Publish events for all affected collections
      const updatedCollections = addToCollectionsResult.value;
      for (const collection of updatedCollections) {
        const publishResult = await this.publishEventsForAggregate(collection);
        if (publishResult.isErr()) {
          console.error(
            'Failed to publish events for collection:',
            publishResult.error,
          );
          // Don't fail the operation if event publishing fails
        }
      }

      return ok({
        cardId: card.cardId.getStringValue(),
      });
    } catch (error) {
      return err(AppError.UnexpectedError.create(error));
    }
  }
}