/*
* Copyright 2016 Nu-book Inc.
* Copyright 2016 ZXing authors
*/
// SPDX-License-Identifier: Apache-2.0

#pragma once

#include "ByteArray.h"

#include <vector>

namespace ZXing::QRCode {

class Version;
enum class ErrorCorrectionLevel;

/**
* <p>Encapsulates a block of data within a QR Code. QR Codes may split their data into
* multiple blocks, each of which is a unit of data and error-correction codewords. Each
* is represented by an instance of this class.</p>
*
* @author Sean Owen
*/
class DataBlock
{
public:
	int numDataCodewords() const { return _numDataCodewords; }

	const ByteArray& codewords() const { return _codewords; }

	ByteArray& codewords() { return _codewords; }

	/**
	* <p>When QR Codes use multiple data blocks, they are actually interleaved.
	* That is, the first byte of data block 1 to n is written, then the second bytes, and so on. This
	* method will separate the data into original blocks.</p>
	*
	* @param rawCodewords bytes as read directly from the QR Code
	* @param version version of the QR Code
	* @param ecLevel error-correction level of the QR Code
	* @return DataBlocks containing original bytes, "de-interleaved" from representation in the
	*         QR Code
	*/
	static std::vector<DataBlock> GetDataBlocks(const ByteArray& rawCodewords, const Version& version, ErrorCorrectionLevel ecLevel);

private:
	int _numDataCodewords = 0;
	ByteArray _codewords;
};

} // namespace ZXing::QRCode