package useCases

import (
	"RenewCMS/internal/domain/user"
	"strings"
	"unicode/utf8"
)

const maxDisplayNameRunes = 60

type UpdateUserProfileUseCase struct {
	userRepository user.Repository
}

func NewUpdateUserProfileUseCase(userRepository user.Repository) *UpdateUserProfileUseCase {
	return &UpdateUserProfileUseCase{userRepository}
}

func (u *UpdateUserProfileUseCase) UpdateDisplayName(userId uint32, displayName string) (user.User, error) {
	trimmed := strings.TrimSpace(displayName)
	if utf8.RuneCountInString(trimmed) > maxDisplayNameRunes {
		return user.User{}, user.ErrInvalidDisplayName
	}
	return u.userRepository.UpdateDisplayName(userId, trimmed)
}