package acl

import (
	"fmt"

	"gorm.io/gorm"
)

type Service struct {
	initialized bool

	db *gorm.DB
}

func NewService(db *gorm.DB) (*Service, error) {
	if db == nil {
		return nil, fmt.Errorf("db is required")
	}
	return &Service{
		db: db,
	}, nil
}

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

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

	// AutoMigrate models
	err := s.db.AutoMigrate(&UserRole{}, &Resource{}, &Role{}, &RoleResource{})
	if err != nil {
		return fmt.Errorf("failed to migrate ACL models: %w", err)
	}

	s.initialized = true
	return nil
}