#include "RTC/RTCP/FuzzerPacket.hpp"
#include "RTC/RTCP/FuzzerBye.hpp"
#include "RTC/RTCP/FuzzerFeedbackPs.hpp"
#include "RTC/RTCP/FuzzerFeedbackRtp.hpp"
#include "RTC/RTCP/FuzzerReceiverReport.hpp"
#include "RTC/RTCP/FuzzerSdes.hpp"
#include "RTC/RTCP/FuzzerSenderReport.hpp"
#include "RTC/RTCP/FuzzerXr.hpp"
#include "RTC/RTCP/Packet.hpp"
#include <cstring> // std::memcpy()

namespace
{
	alignas(4) thread_local uint8_t DataBuffer[65536];
} // namespace

void FuzzerRtcRtcpPacket::Fuzz(const uint8_t* data, size_t len)
{
	if (!RTC::RTCP::Packet::IsRtcp(data, len))
	{
		return;
	}

	// NOTE: We need to copy given data into another buffer because we are gonna
	// write into it.
	std::memcpy(DataBuffer, data, len);

	RTC::RTCP::Packet* packet = RTC::RTCP::Packet::Parse(DataBuffer, len);

	if (!packet)
	{
		return;
	}

	while (packet != nullptr)
	{
		auto* previousPacket = packet;

		switch (RTC::RTCP::Type(packet->GetType()))
		{
			case RTC::RTCP::Type::SR:
			{
				auto* sr = dynamic_cast<RTC::RTCP::SenderReportPacket*>(packet);

				FuzzerRtcRtcpSenderReport::Fuzz(sr);

				break;
			}

			case RTC::RTCP::Type::RR:
			{
				auto* rr = dynamic_cast<RTC::RTCP::ReceiverReportPacket*>(packet);

				FuzzerRtcRtcpReceiverReport::Fuzz(rr);

				break;
			}

			case RTC::RTCP::Type::SDES:
			{
				auto* sdes = dynamic_cast<RTC::RTCP::SdesPacket*>(packet);

				FuzzerRtcRtcpSdes::Fuzz(sdes);

				break;
			}

			case RTC::RTCP::Type::BYE:
			{
				auto* bye = dynamic_cast<RTC::RTCP::ByePacket*>(packet);

				FuzzerRtcRtcpBye::Fuzz(bye);

				break;
			}

			case RTC::RTCP::Type::RTPFB:
			{
				FuzzerRtcRtcpFeedbackRtp::Fuzz(packet);

				break;
			}

			case RTC::RTCP::Type::PSFB:
			{
				FuzzerRtcRtcpFeedbackPs::Fuzz(packet);

				break;
			}

			case RTC::RTCP::Type::XR:
			{
				auto* xr = dynamic_cast<RTC::RTCP::ExtendedReportPacket*>(packet);

				FuzzerRtcRtcpExtendedReport::Fuzz(xr);

				break;
			}

			default:
			{
			}
		}

		packet = packet->GetNext();

		delete previousPacket;
	}
}