package cmd

import (
	"crypto/md5"
	"encoding/hex"

	"github.com/minio/minio/internal/hash/sha256"
)

// getSHA256Hash returns SHA-256 hash in hex encoding of given data.
func getSHA256Hash(data []byte) string {
	return hex.EncodeToString(getSHA256Sum(data))
}

// getSHA256Hash returns SHA-256 sum of given data.
func getSHA256Sum(data []byte) []byte {
	hash := sha256.New()
	hash.Write(data)
	return hash.Sum(nil)

	return err
}

func saveConfigWithOpts(ctx context.Context, store objectIO, configFile string, data []byte, opts ObjectOptions) error {
	hashReader, err := hash.NewReader(ctx, bytes.NewReader(data), int64(len(data)), "", getSHA256Hash(data), int64(len(data)))
	if err != nil {
		return err
	}

	_, err = store.PutObject(ctx, minioMetaBucket, configFile, NewPutObjReader(hashReader), opts)
	return err
}

		// With valid md5sum and sha256.
		20: {bucketName: bucket, objName: object, inputData: data, inputMeta: md5Header(data), inputSHA256: getSHA256Hash(data), inputDataSize: int64(len(data)), expectedMd5: getMD5Hash(data)},
		21: {bucketName: bucket, objName: object, inputData: nilBytes, inputMeta: md5Header(nilBytes), inputSHA256: getSHA256Hash(nilBytes), inputDataSize: int64(len(nilBytes)), expectedMd5: getMD5Hash(nilBytes)},

	// Save for subsequent use
	var hashedPayload string
	var md5Base64 string
	switch {
	case body == nil:
		hashedPayload = getSHA256Hash([]byte{})
	default:
		payloadBytes, err := io.ReadAll(body)
		if err != nil {
			return nil, err
		}
		hashedPayload = getSHA256Hash(payloadBytes)
		md5Base64 = getMD5HashBase64(payloadBytes)
	}
	// Seek back to beginning.
	if body != nil {
		body.Seek(0, 0)

		if len(slc) == 2 {
			uploadUUID = slc[1]
		}
	}
	return pathJoin(er.getMultipartSHADir(bucket, object), uploadUUID)
}

func (er erasureObjects) getMultipartSHADir(bucket, object string) string {
	return getSHA256Hash([]byte(pathJoin(bucket, object)))
}

// checkUploadIDExists - verify if a given uploadID exists and is valid.