package user

import "fmt"

type Service struct {
	initialized bool

	store UserCRUD
}

func NewService(store UserCRUD) (*Service, error) {
	if store == nil {
		return nil, fmt.Errorf("store is nil")
	}
	return &Service{
		store: store,
	}, nil
}

func (s *Service) isInitialized() bool {
	return s.initialized
}

func (s *Service) Init() error {
	if s.isInitialized() {
		return nil
	}

	err := s.store.init()
	if err != nil {
		return fmt.Errorf("failed to initialize user store: %w", err)
	}

	s.initialized = true
	return nil
}

func (s *Service) Create(user *User) error {
	if !s.isInitialized() {
		return fmt.Errorf("user service is not initialized")
	}
	return s.store.Create(user)
}

func (s *Service) GetBy(by, value string) (*User, error) {
	if !s.isInitialized() {
		return nil, fmt.Errorf("user service is not initialized")
	}
	return s.store.GetBy(by, value)
}

func (s *Service) Update(user *User) error {
	if !s.isInitialized() {
		return fmt.Errorf("user service is not initialized")
	}
	return s.store.Update(user)
}

func (s *Service) Delete(id int64) error {
	if !s.isInitialized() {
		return fmt.Errorf("user service is not initialized")
	}
	return s.store.Delete(id)
}