package useCases

import (
	"RenewCMS/internal/domain/audit"
	"RenewCMS/internal/domain/image"
	"context"
)

type PurgeImageVariantUseCase struct {
	images   image.Repository
	variants image.VariantRepository
	files    image.VariantFileRepository
	cache    variantCache
	recorder audit.Recorder
}

func NewPurgeImageVariantUseCase(images image.Repository, variants image.VariantRepository, files image.VariantFileRepository, storage image.Storage, recorder audit.Recorder) *PurgeImageVariantUseCase {
	return &PurgeImageVariantUseCase{images, variants, files, variantCache{files, storage}, recorder}
}

func (u *PurgeImageVariantUseCase) Purge(ctx context.Context, id uint32, name string) (VariantPurgeResult, error) {
	img, err := u.images.Get(id)
	if err != nil {
		return VariantPurgeResult{}, err
	}
	variant, err := u.variants.Get(name)
	if err != nil {
		return VariantPurgeResult{}, err
	}
	if variant.Name != name {
		return VariantPurgeResult{}, image.ErrVariantNotFound
	}

	event := audit.NewEvent(audit.ActionVariantPurgeImage, audit.CategoryMedia)
	event.Target = imageTarget(img)
	row, found, err := u.files.Find(name, image.StoredName(img.Path))
	if err != nil {
		recordFailure(ctx, u.recorder, event, err)
		return VariantPurgeResult{}, err
	}
	if !found {
		return VariantPurgeResult{}, nil
	}
	purged, err := u.cache.purge([]image.VariantFile{row})
	if err != nil {
		recordFailure(ctx, u.recorder, event, err)
		return VariantPurgeResult{}, err
	}
	event.Params = variantPurgeParams(purged)
	u.recorder.Record(ctx, event)
	return purged, nil
}