// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

import { Sha256 } from '@aws-crypto/sha256-js';
import { SourceData } from '@smithy/types';

import { getHexFromBytes } from './getHexFromBytes';

/**
 * Calculate a hash from a `SourceData`
 * @param {SourceData} data Value to hash.
 * @returns {string} Hex-encoded hash.
 * @private
 */
export const getHashFromData = (data: SourceData): string => {
	const sha256 = new Sha256();
	sha256.update(data);

	const hashedData = sha256.digestSync();
	const hashHexFromUint8 = getHexFromBytes(hashedData);

	return new Array(64 - hashHexFromUint8.length).join('0') + hashHexFromUint8;
};