package bolt

import (
	bolt "go.etcd.io/bbolt"
	"net/url"
	"time"
	"os"
)

type BoltStorage struct {
	DB *bolt.DB
}

func (stor *BoltStorage) Shutdown() {
	stor.DB.Close()
}

func New(u *url.URL) (*BoltStorage, error) {
	path := u.Opaque
	if u.Path != "" {
		path = u.Path
	}

	db, err := bolt.Open(path, 0600, &bolt.Options{Timeout: 3 * time.Second})
	if err != nil {
		return nil, err
	}
	return &BoltStorage{DB: db}, nil
}

func (stor *BoltStorage) Backup(bpath string) error {
	tx, err := stor.DB.Begin(false)
	if err != nil {
		return err
	}
	defer tx.Rollback()

	err = tx.CopyFile(bpath, os.FileMode(0600))
	if err != nil {
		return err
	}
	return nil
}