package blobstor

import (
	"os"

	"github.com/nspcc-dev/neofs-api-go/pkg/object"
	"github.com/pkg/errors"
)

// DeleteBigPrm groups the parameters of DeleteBig operation.
type DeleteBigPrm struct {
	address
}

// DeleteBigRes groups resulting values of DeleteBig operation.
type DeleteBigRes struct{}

// DeleteBig removes object from shallow dir of BLOB storage.
//
// Returns any error encountered that did not allow
// to completely remove the object.
//
// Returns ErrObjectNotFound if there is no object to delete.
func (b *BlobStor) DeleteBig(prm *DeleteBigPrm) (*DeleteBigRes, error) {
	b.mtx.Lock()
	defer b.mtx.Unlock()

	err := b.fsTree.delete(prm.addr)
	if errors.Is(err, errFileNotFound) {
		err = ErrObjectNotFound
	}

	return nil, err
}

func (t *fsTree) delete(addr *object.Address) error {
	p := t.treePath(addr)

	if _, err := os.Stat(p); os.IsNotExist(err) {
		return errFileNotFound
	}

	return os.Remove(p)
}