package useCases

import "RenewCMS/internal/domain/image"

type ListVariantsUseCase struct {
	variants image.VariantRepository
	files    image.VariantFileRepository
}

func NewListVariantsUseCase(variants image.VariantRepository, files image.VariantFileRepository) *ListVariantsUseCase {
	return &ListVariantsUseCase{variants, files}
}

func (u *ListVariantsUseCase) List() ([]VariantSummary, error) {
	variants, err := u.variants.List()
	if err != nil {
		return nil, err
	}
	totals, err := u.files.Totals()
	if err != nil {
		return nil, err
	}
	summaries := make([]VariantSummary, 0, len(variants))
	for _, variant := range variants {
		summaries = append(summaries, summarize(variant, totals))
	}
	return summaries, nil
}