mnemo_cards/mnemo_cards_backend/lib/packs/pack_dto_converter.dart

import 'package:injectable/injectable.dart';
import 'package:mnemo_cards_backend/api/ads/ads_manager.dart';
import 'package:mnemo_cards_backend/extensions.dart';
import 'package:mnemo_cards_common_backend/mnemo_cards_common_backend.dart';
import 'package:mnemo_cards_backend/packs/card_model_extension.dart';
import 'package:mnemo_cards_common/mnemo_cards_common.dart';

import 'products_price_resolver.dart';

bool canOpenForAd(String? id) => id != null;

@LazySingleton()
class PackDtoConverter {
  final ProductsPriceResolver _productsPriceResolver;
  final AdsManager _adsManager;

  const PackDtoConverter(this._productsPriceResolver, this._adsManager);

  Future<CardPackPreviewDto> toCardPackPreviewDto(
    CardPackModel model,
    UserModel? userModel,
  ) async {
    // Check access via purchases list (source of truth is user_packs table in DB)
    // user.purchases is a cached list of pack IDs the user has access to
    bool available = userModel != null &&
        (userModel.purchases.contains(model.id?.toString()) ||
            userModel.admin);
    if (userModel != null && !available) {
      available =
          userModel.subscriptionModel?.features.contains(
            SubscriptionFeatureEnum.packs,
          ) ==
          true;
    }

    String? price = model.price;
    if (userModel != null && !available) {
      price = await _productsPriceResolver.userPackPrice(userModel, model);
    }

    final canOpenForAdVal = !available && canOpenForAd(model.id);

    // Generate cover image URL
    String? coverUrl;
    if (model.cover != null && model.cover!.isNotEmpty) {
      final coverValue = model.cover!.trim();

      // If it's already a remote URL, use it directly
      if (coverValue.startsWith('http://') ||
          coverValue.startsWith('https://')) {
        coverUrl = coverValue;
      }
      // If it's a UUID or any other value, use API endpoint
      else if (coverValue.isNotEmpty) {
        coverUrl = '/api/v2/packs/${model.id.toString()}/cover';
      }
    }

    return CardPackPreviewDto(
      id: model.id.toString(),
      title: model.title,
      subtitle: model.subtitle,
      cards: model.cards.length,
      tests: model.tests.length,
      price: price,
      imageUrl: coverUrl,
      color: model.color,
      isAvailable: available,
      // trail: 'asset:icons/gift.png',
      tip: available
          ? null
          : canOpenForAdVal
          ? AssetPackTip('icons/ad.webp', position: PackTipPosition.bottomRight)
          : AssetPackTip(
              'icons/lock.webp',
              position: PackTipPosition.bottomRight,
            ),
      version: model.version,
    );
  }

  Future<CardPackBuyDto> toCardPackBuyDto(
    CardPackModel model,
    UserModel? userModel,
  ) async {
    final price = userModel == null
        ? model.price
        : await _productsPriceResolver.userPackPrice(userModel, model);

    final canOpenForAdVal = userModel != null && canOpenForAd(model.id);
    String? _adsKey;

    if (canOpenForAdVal) {
      _adsKey = _adsManager.getAdsKey([model], userModel);
    }

    return CardPackBuyDto(
      id: model.id.toString(),
      title: model.title,
      subtitle: model.subtitle,
      appStoreId: model.appStoreId,
      rustoreId: model.rustoreId,
      googlePlayId: model.googlePlayId,
      cards: await Future.wait(
        (model.previewCards.isNotEmpty
                ? model.previewCards
                : model.cards.take(3))
            .toDtosList(model.cardsOrder)
            .map(
              (dto) async => dto.copyWith(
                image:
                    null, // Legacy: card images should be stored in MinIO, not read from disk
              ),
            ),
      ),
      items: [
        if (model.description != null) TextItem(title: model.description),
        if (_adsKey == null) ...[
          SpacerItem(),
          TextItem(
            subtitle: 'Открыть все темы с подпиской!',
            deeplink: SubscriptionOpenDeeplink().uri.toString(),
          ),
        ],
        if (_adsKey != null) ...[
          SpacerItem(),
          TextItem(
            subtitle: 'Эту тему можно открыть, посмотрев рекламу',
            deeplink: ProductForAdDeeplink(
              model.toDto(),
              _adsKey,
            ).uri.toString(),
          ),
        ],
        SpacerItem(flex: 0, height: 10),
        if (_adsKey == null) ...[
          TextItem(
            subtitle: 'Оплатить российской картой',
            deeplink: PurchaseInitDeeplink(
              id: model.id.toString(),
              productType: MnemoCardsProductType.pack,
              paymentId: model.id.toString(),
              paymentSystem: PaymentSystem.yookassa,
            ).uri.toString(),
          ),
        ],
        SpacerItem(height: 20, flex: 0),
      ],
      color: model.color,
      version: model.version,
      price: price,
    );
  }

  Future<EditCardPackDto> toEditDto(
    CardPackModel model, {
    bool withCards = true,
    bool withTests = false,
    bool withUsers = false,
  }) async {
    return EditCardPackDto(
      id: model.id.toString(),
      title: model.title,
      subtitle: model.subtitle,
      color: model.color,
      version: model.version,
      cover:
          null, // Legacy: covers should be stored in MinIO, not read from disk
      size: model.size,
      googlePlayId: model.googlePlayId,
      rustoreId: model.rustoreId,
      appStoreId: model.appStoreId,
      price: model.price,
      description: model.description,
      enabled: model.enabled,
      addCardIds: withCards
          ? model.cards.map((c) => c.id.toString()).toList()
          : null,
      addTestIds: withTests
          ? model.tests.map((t) => t.id.toString()).toList()
          : null,
      removeCardIds: null,
      removeTestIds: null,
      previewCards: model.previewCards
          .map((card) => card.id.toString())
          .whereNotNull()
          .toList(),
      order: model.order,
      cardsOrder: model.cardsOrder,
    );
  }

  CardPackDto toDto(CardPackModel model) {
    return CardPackDto(
      id: model.id.toString(),
      title: model.title,
      subtitle: model.subtitle,
      cards: model.cards.toDtosList(model.cardsOrder),
      color: model.color,
      version: model.version,
    );
  }

  CardPackModel toModel(EditCardPackDto dto, CardPackModel? model) {
    return CardPackModel(
      title: dto.title ?? model?.title ?? '',
      subtitle: dto.subtitle ?? model?.subtitle ?? '',
      size: dto.size ?? model?.size ?? 0,
      color: dto.color ?? model?.color,
      cover: dto.cover ?? model?.cover,
      description: dto.description ?? model?.description,
      version: dto.version ?? model?.version,
      id: model?.id ?? dto.id,
      googlePlayId: dto.googlePlayId ?? model?.googlePlayId,
      rustoreId: dto.rustoreId ?? model?.rustoreId,
      appStoreId: dto.appStoreId ?? model?.appStoreId,
      price: dto.price ?? model?.price,
      enabled: dto.enabled ?? model?.enabled ?? false,
      order: dto.order ?? model?.order ?? 0,
      cardsOrder: dto.cardsOrder ?? model?.cardsOrder ?? const [],
      currency: model?.currency ?? 'RUB',
    );
  }
}