package service

import (
	"ego/internal/conf"
	"strings"
	"sync"
)

type SysSequenceService struct {
	mutex     sync.Mutex
	tableName string
}

// SysSequenceServiceBuilder 创建一个SysSequenceService
func SysSequenceServiceBuilder(tableName string) *SysSequenceService {
	return &SysSequenceService{
		tableName: tableName,
	}
}

// GenerateId 根据表名生成ID（使用序列）
func (s *SysSequenceService) GenerateId() (string, error) {
	s.mutex.Lock()
	defer s.mutex.Unlock()
	var id string
	err := conf.Db.Raw("SELECT NEXTVAL(?)", strings.ToLower(s.tableName)).Scan(&id).Error
	if err != nil {
		return "", err
	}
	return id, nil
}