// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include <zencore/iobuffer.h>
#include <zencore/iohash.h>

#include <functional>

namespace zen {

class IoBuffer;
class CbPackage;
class CompositeBuffer;

struct CbPackageHeader
{
	uint32_t HeaderMagic;
	uint32_t AttachmentCount;
	uint32_t Reserved1;
	uint32_t Reserved2;
};

static_assert(sizeof(CbPackageHeader) == 16);

static constinit uint32_t kCbPkgMagic = 0xaa77aacc;

struct CbAttachmentEntry
{
	uint64_t AttachmentSize;
	uint32_t Flags;
	IoHash	 AttachmentHash;

	enum
	{
		kIsCompressed = (1u << 0),	// Is marshaled using compressed buffer storage format
		kIsObject	  = (1u << 1),	// Is compact binary object
	};
};

static_assert(sizeof(CbAttachmentEntry) == 32);

std::vector<IoBuffer> FormatPackageMessage(const CbPackage& Data);
CompositeBuffer		  FormatPackageMessageBuffer(const CbPackage& Data);
CbPackage			  ParsePackageMessage(
				IoBuffer												  Payload,
				std::function<IoBuffer(const IoHash& Cid, uint64_t Size)> CreateBuffer = [](const IoHash&, uint64_t Size) -> IoBuffer {
		return IoBuffer{Size};
				});

}  // namespace zen