// ValidateRepositoryName validates a repository name.
func ValidateRepositoryName(reposName string) error {
	if err := validateNoSchema(reposName); err != nil {
		return err
	}

	_, remoteName := splitReposName(reposName)

	return v2.ValidateRepositoryName(remoteName)
}

// RepositoryScoped returns the scoped cache.
func (rbds *redisBlobDescriptorService) RepositoryScoped(repo string) (distribution.BlobDescriptorService, error) {
	if err := v2.ValidateRepositoryName(repo); err != nil {
		return nil, err
	}

	return &repositoryScopedRedisBlobDescriptorService{
		repo:     repo,
		upstream: rbds,
	}, nil
}

func validateRemoteName(remoteName string) error {

	if !strings.Contains(remoteName, "/") {

		// the repository name must not be a valid image ID
		if err := image.ValidateID(remoteName); err == nil {
			return fmt.Errorf("Invalid repository name (%s), cannot specify 64-byte hexadecimal strings", remoteName)
		}
	}

	return v2.ValidateRepositoryName(remoteName)
}

func (imbdcp *inMemoryBlobDescriptorCacheProvider) RepositoryScoped(repo string) (distribution.BlobDescriptorService, error) {
	if err := v2.ValidateRepositoryName(repo); err != nil {
		return nil, err
	}

	imbdcp.mu.RLock()
	defer imbdcp.mu.RUnlock()

	return &repositoryScopedInMemoryBlobDescriptorCache{
		repo:       repo,
		parent:     imbdcp,
		repository: imbdcp.repositories[repo],
	}, nil
}

// NewRepository creates a new Repository for the given repository name and base URL
func NewRepository(ctx context.Context, name, baseURL string, transport http.RoundTripper) (distribution.Repository, error) {
	if err := v2.ValidateRepositoryName(name); err != nil {
		return nil, err
	}

	ub, err := v2.NewURLBuilderFromString(baseURL)
	if err != nil {
		return nil, err
	}

	client := &http.Client{
		Transport: transport,
		// TODO(dmcgowan): create cookie jar
	}

	return &repository{
		client:  client,
		ub:      ub,
		name:    name,
		context: ctx,
	}, nil
}

// Repository returns an instance of the repository tied to the registry.
// Instances should not be shared between goroutines but are cheap to
// allocate. In general, they should be request scoped.
func (reg *registry) Repository(ctx context.Context, name string) (distribution.Repository, error) {
	if err := v2.ValidateRepositoryName(name); err != nil {
		return nil, distribution.ErrRepositoryNameInvalid{
			Name:   name,
			Reason: err,
		}
	}

	var descriptorCache distribution.BlobDescriptorService
	if reg.blobDescriptorCacheProvider != nil {
		var err error
		descriptorCache, err = reg.blobDescriptorCacheProvider.RepositoryScoped(name)
		if err != nil {
			return nil, err
		}
	}

	return &repository{
		ctx:             ctx,
		registry:        reg,
		name:            name,
		descriptorCache: descriptorCache,
	}, nil
}