"math"
	"net/url"
	"sort"
	"strings"
	"sync"

	"github.com/tinylib/msgp/msgp"
)

// Recycler will override the internal reuse in typed handlers.
// When this is supported, the handler will not do internal pooling of objects,
// call Recycle() when the object is no longer needed.
// The recycler should handle nil pointers.
type Recycler interface {
	Recycle()
}

// MSS is a map[string]string that can be serialized.

	size   int64 // actual object size regardless of compression/encryption
	offset int64
	reader io.ReadCloser

	// reader can be closed idempotently multiple times
	closerOnce sync.Once
	// Error storing reader.Close()
	closerErr error
}

// NewObjectReadSeekCloser creates a new ObjectReadSeekCloser.
func NewObjectReadSeekCloser(segmentReader ObjectSegmentReaderFn, actualSize int64) *ObjectReadSeekCloser {

	for k, v := range encMetadata {
		metadata[k] = v
	}

	// Ensure that metadata does not contain sensitive information
	crypto.RemoveSensitiveEntries(metadata)

	if isCompressible(r.Header, object) {
		// Storing the compression metadata.
		metadata[ReservedMetadataPrefix+"compression"] = compressionAlgorithmV2
	}

	opts, err := putOptsFromReq(ctx, r, bucket, object, metadata)
	if err != nil {

	}
	h.ignoreNilConn = true
	return h
}

// WithSharedResponse indicates it is unsafe to reuse the response
// when it has been returned on a handler.
// This will disable automatic response recycling/pooling.
// Typically this is used when the response sharing part of its data structure.
func (h *SingleHandler[Req, Resp]) WithSharedResponse() *SingleHandler[Req, Resp] {
	h.sharedResp = true
	return h
}

	// IndexCB will return any index created but the compression.
	// Object must have been read at this point.
	IndexCB func() []byte

	// InclFreeVersions indicates that free versions need to be included
	// when looking up a version by fi.VersionID
	InclFreeVersions bool
	// SkipFreeVersion skips adding a free version when a tiered version is
	// being 'replaced'
	// Note: Used only when a tiered object is being expired.

// An S3 implementation has to remember the content MD5 of objects
// in case of SSE-S3. However, storing the ETag of an encrypted
// object in plaintext may reveal some information about the object.
// For example, two objects with the same ETag are identical with
// a very high probability.
//
// Therefore, an S3 implementation may encrypt an ETag before storing
// it. In this case, the stored ETag may not be a well-formed S3 ETag.

}

// hashOrder - hashes input key to return consistent
// hashed integer slice. Returned integer order is salted
// with an input key. This results in consistent order.
// NOTE: collisions are fine, we are not looking for uniqueness
// in the slices returned.
func hashOrder(key string, cardinality int) []int {
	if cardinality <= 0 {
		// Returns an empty int slice for cardinality < 0.
		return nil
	}

		return "", false, errors.New("no Base DNs given")
	}

	// Check that DN exists in the LDAP directory.
	validatedDN, err := xldap.LookupDN(conn, dn)
	if err != nil {
		return "", false, fmt.Errorf("Error looking up DN %s: %w", dn, err)
	}
	if validatedDN == "" {
		return "", false, nil
	}

	// This will not return an error as the argument is validated to be a DN.
	pdn, _ := ldap.ParseDN(validatedDN)