#include <algorithm>
#include <dlfcn.h>
#include <iostream>
#include <opts.h>
#include <stdexcept>

#include <adapters/boostAsio/deadlineTimerAReq.h>
#include <livoxProto1/protocol.h>
#include <user/intrinThresholdParams.h>
#include <user/senseApiDesc.h>

#include "livoxGen1Internal.h"

namespace smo::stim_buff {

constexpr int LIVOX_GEN1_DEVICE_COMMAND_DELAY_MS = 5;

// Salmanoff hooks, obtained from SMO_GET_STIM_BUFF_API_DESC_FN_NAME().
const SmoCallbacks *smoHooksPtr = nullptr;
SmoThreadingModelDesc smoThreadingModelDesc;

// Local collection of stimulus producers
std::vector<std::shared_ptr<StimulusProducer>> managedStimulusProducers;

LivoxProto1DllState::LivoxProto1DllState()
: dlopenHandle(nullptr, DlCloser),
  livoxProto1_main(nullptr),
  livoxProto1_exit(nullptr),
  livoxProto1_getOrCreateDeviceCReq(nullptr),
  livoxProto1_destroyDeviceCReq(nullptr),
  livoxProto1_device_enablePcloudDataCReq(nullptr),
  livoxProto1_device_disablePcloudDataCReq(nullptr),
  livoxProto1_device_getReturnModeCReq(nullptr),
  livoxProto1_getPcloudDataFdDesc(nullptr)
{}

void LivoxProto1DllState::DlCloser(void *handle)
{
	if (handle) {
		dlclose(handle);
	}
}

LivoxProto1DllState livoxProto1;

std::shared_ptr<StimulusProducer> getStimulusProducer(
	const std::shared_ptr<device::DeviceAttachmentSpec> &spec)
{
	for (const auto &stimProducer : managedStimulusProducers)
	{
		if (livoxProto1::comms::deviceIdentifiersEqual(
				stimProducer->deviceAttachmentSpec->deviceSelector,
				spec->deviceSelector)
			&& stimProducer->exportsQualeIfaceApi(spec->qualeIfaceApi))
		{
			return stimProducer;
		}
	}

	return nullptr;
}

size_t parseNDgramsPerFrame(
	const std::shared_ptr<device::DeviceAttachmentSpec> &spec)
{
	const std::vector<std::string> nDgramsPerFrameParamNames = {
		"n-dgrams-per-frame",
		"num-dgrams-per-frame"
	};

	return static_cast<size_t>(
		device::DeviceAttachmentSpec::parseOptionalParamAsIntWithSynonyms(
			spec->stimBuffApiParams,
			nDgramsPerFrameParamNames,
			84));
}

LivoxProviderParams parseLivoxProviderParams(
	const std::shared_ptr<device::DeviceAttachmentSpec> &desc)
{
	using device::DeviceAttachmentSpec;

	const auto& providerParams = desc->providerParams;

	static const std::vector<std::string> cmdTimeoutSynonyms = {
		"cmd-timeout-ms",
		"command-timeout-ms",
	};
	static const std::vector<std::string> retryDelaySynonyms = {
		"retry-delay-ms",
	};
	static const std::vector<std::string> smoSubnetSynonyms = {
		"smo-subnet-nbits",
	};
	static const std::vector<std::string> dataPortSynonyms = {
		"data-port",
	};
	static const std::vector<std::string> cmdPortSynonyms = {
		"cmd-port",
	};
	static const std::vector<std::string> imuPortSynonyms = {
		"imu-port",
	};
	static const std::vector<std::string> smoIpSynonyms = {
		"smo-ip",
	};

	DeviceAttachmentSpec::rejectUnknownParams(
		providerParams,
		std::string(__func__) + ": Unknown provider parameter: ",
		cmdTimeoutSynonyms,
		retryDelaySynonyms,
		smoSubnetSynonyms,
		dataPortSynonyms,
		cmdPortSynonyms,
		imuPortSynonyms,
		smoIpSynonyms);

	LivoxProviderParams params;

	if (const auto matchedParam = DeviceAttachmentSpec::findOptionalParamWithSynonyms(
			providerParams, cmdTimeoutSynonyms))
	{
		params.commandTimeoutMs = DeviceAttachmentSpec::parseParamValueAsInt(
			matchedParam->first, matchedParam->second);
	}

	if (const auto matchedParam = DeviceAttachmentSpec::findOptionalParamWithSynonyms(
			providerParams, retryDelaySynonyms))
	{
		params.retryDelayMs = DeviceAttachmentSpec::parseParamValueAsInt(
			matchedParam->first, matchedParam->second);
	}

	if (const auto matchedParam = DeviceAttachmentSpec::findOptionalParamWithSynonyms(
			providerParams, smoSubnetSynonyms))
	{
		params.smoSubnetNbits = static_cast<uint8_t>(
			DeviceAttachmentSpec::parseParamValueAsInt(
				matchedParam->first, matchedParam->second));
	}

	if (const auto matchedParam = DeviceAttachmentSpec::findOptionalParamWithSynonyms(
			providerParams, dataPortSynonyms))
	{
		params.dataPort = static_cast<uint16_t>(
			DeviceAttachmentSpec::parseParamValueAsInt(
				matchedParam->first, matchedParam->second));
	}

	if (const auto matchedParam = DeviceAttachmentSpec::findOptionalParamWithSynonyms(
			providerParams, cmdPortSynonyms))
	{
		params.cmdPort = static_cast<uint16_t>(
			DeviceAttachmentSpec::parseParamValueAsInt(
				matchedParam->first, matchedParam->second));
	}

	if (const auto matchedParam = DeviceAttachmentSpec::findOptionalParamWithSynonyms(
			providerParams, imuPortSynonyms))
	{
		params.imuPort = static_cast<uint16_t>(
			DeviceAttachmentSpec::parseParamValueAsInt(
				matchedParam->first, matchedParam->second));
	}

	if (const auto matchedParam = DeviceAttachmentSpec::findOptionalParamWithSynonyms(
			providerParams, smoIpSynonyms))
	{
		if (matchedParam->second.empty()) {
			throw std::runtime_error(
				std::string(__func__) + ": smo-ip parameter is empty");
		}

		if (matchedParam->second.find('.') == std::string::npos
			|| std::count(
				matchedParam->second.begin(),
				matchedParam->second.end(),
				'.') != 3)
		{
			throw std::runtime_error(
				std::string(__func__)
				+ ": smo-ip parameter is not an IPv4 address");
		}

		params.smoIp = matchedParam->second;
	}

	return params;
}

constexpr size_t MAX_STIM_PRODUCERS_PER_DEVICE = 2;

// Helper method to ensure StimBuffer is attached
// Returns true if successful, false on error
bool ensureStimBufferAttachedWithoutDuplicates(
	const std::shared_ptr<PcloudStimulusProducer> &stimProducer,
	const std::shared_ptr<device::DeviceAttachmentSpec> &spec)
{
	if (!stimProducer) {
		std::cerr << __func__ << ": stimProducer is null" << std::endl;
		return false;
	}

	// Check for duplicate qualeIfaceApi
	const std::string &qualeIfaceApi = spec->qualeIfaceApi;
	if (stimProducer->hasBufferWithQualeIfaceApi(qualeIfaceApi)) {
		std::cerr << __func__ << ": Buffer with qualeIfaceApi '"
			<< qualeIfaceApi << "' already exists for this producer. "
			"Each producer can only have one buffer per qualeIfaceApi."
			<< std::endl;
		return false;
	}

	// Call getOrCreateAttachedStimulusBuffer (may throw, catch and return failure)
	try {
		stimProducer->getOrCreateAttachedStimulusBuffer(spec);
	} catch (const std::exception &e) {
		std::cerr << __func__ << ": Failed to create StimBuffer: "
			<< e.what() << ". Producer is committed, DeviceReattacher will retry."
			<< std::endl;
		// Return false so caller can handle error callback
		return false;
	}

	return true;
}

void addManagedStimulusProducer(
	const std::shared_ptr<PcloudStimulusProducer> &producer,
	const std::shared_ptr<livoxProto1::Device> &device)
{
	if (!producer || !device) {
		throw std::runtime_error(
			std::string(__func__) + ": producer and device must be non-null");
	}

	device->nAttachedStimulusProducers++;
	if (device->nAttachedStimulusProducers > MAX_STIM_PRODUCERS_PER_DEVICE)
	{
		device->nAttachedStimulusProducers--;
		throw std::runtime_error(
			std::string(__func__) + ": Each LivoxGen1 device can only have "
			"at most two StimulusProducers attached to it. Found "
			+ std::to_string(device->nAttachedStimulusProducers + 1) + ".");
	}

	managedStimulusProducers.push_back(producer);
	if (false
		/*managedStimulusProducers.size() >= 2*nDevicesKnownToGen1Lib */)
	{
		/**	TODO:
		 * It would be nice to add an nDevicesKnownToGen1Lib counter, and
		 * then add a check here to ensure that
		 * managedStimulusProducers.size() is always less than or equal to
		 * 2*nDevicesKnownToGen1Lib.
		 *
		 * (2 stim producers per device).
		 */
#if 0
		throw std::runtime_error(
			std::string(__func__) + ": Number of StimulusProducers attached "
			"to LivoxGen1 devices known to the library ("
			+ std::to_string(managedStimulusProducers.size())
			+ ") is greater than "
			"expected. Lib knows about "
			+ std::to_string(nDevicesKnownToGen1Lib) + " devices, "
			"so there should be at most "
			+ std::to_string(2*nDevicesKnownToGen1Lib)
			+ " StimulusProducers attached to devices.");
#endif
	}

	producer->start();
}

sscl::co::ViralNonPostingInvoker<bool> removeManagedStimulusProducerIfUnused(
	const std::shared_ptr<PcloudStimulusProducer> &producer,
	const std::shared_ptr<sscl::ComponentThread> &/*componentThread*/)
{
	if (!producer) {
		co_return true;
	}

	if (!producer->attachedStimulusBuffers.empty()) {
		co_return true;
	}

	// No other buffers - stop and remove StimProducer
	producer->stop();

	auto it = std::find_if(
		managedStimulusProducers.begin(),
		managedStimulusProducers.end(),
		[&producer](const std::shared_ptr<StimulusProducer> &candidate)
		{
			/**	FIXME:
			 * When we implement the ImuStimulusProducer, we need to make
			 * sure we handle that properly here.
			 */
			auto pcloudProducer =
				std::dynamic_pointer_cast<PcloudStimulusProducer>(candidate);
			return pcloudProducer && pcloudProducer == producer;
		});
	if (it != managedStimulusProducers.end()) {
		managedStimulusProducers.erase(it);
	}

	if (!producer->device) {
		co_return true;
	}

	if (producer->device->nAttachedStimulusProducers > 0) {
		producer->device->nAttachedStimulusProducers--;
	}

	if (producer->device->nAttachedStimulusProducers > 0) {
		co_return true;
	}

	const bool destroyed = co_await (*livoxProto1.livoxProto1_destroyDeviceCReq)(
		producer->device);
	if (!destroyed)
	{
		std::cerr << __func__ << ": Failed to destroy dev "
			"device " << producer->deviceAttachmentSpec->deviceSelector
			<< " for stim producer.\n";

		co_return false;
	}

	co_return true;
}

namespace {

void stopAllManagedProducersBeforeFinalize()
{
	for (const auto &producer : managedStimulusProducers)
	{
		if (!producer) {
			continue;
		}

		producer->stop();
	}
}

bool validateAttachRequest(
	const std::shared_ptr<device::DeviceAttachmentSpec> &desc)
{
	// Validate qualeIfaceApi
	const std::string &qualeIfaceApi = desc->qualeIfaceApi;
	if (qualeIfaceApi == "gyro" || qualeIfaceApi == "accel")
	{
		// These are for ImuStimulusProducer (not yet implemented)
		std::cerr << __func__ << ": qualeIfaceApi '" << qualeIfaceApi
			<< "' requires ImuStimulusProducer which is not yet implemented"
			<< std::endl;
		return false;
	}

	try {
		smo::intrin::validateNoIntrinParamsOnQualeIface(
			desc->qualeIfaceApi,
			desc->qualeIfaceApiParams);
	} catch (const std::runtime_error &e) {
		std::cerr << __func__ << ": " << e.what() << std::endl;
		return false;
	}

	if (!PcloudStimulusProducer::supportsQualeIfaceApi(qualeIfaceApi))
	{
		// Unknown qualeIfaceApi
		std::cerr << __func__ << ": Unsupported qualeIfaceApi '"
			<< qualeIfaceApi << "' for LivoxGen1. "
			"Supported values: mesh, pcloudIntensity, "
			"pcloudLightAmbience, pcloudDarkAmbience"
			<< std::endl;
		return false;
	}

	return true;
}

sscl::co::ViralNonPostingInvoker<StimBuffDeviceOpResult>
enablePcloudDataForAttach(
	const std::shared_ptr<device::DeviceAttachmentSpec> &desc,
	const std::shared_ptr<sscl::ComponentThread> &/*componentThread*/,
	const std::shared_ptr<livoxProto1::Device> &device)
{
	/* Enable pcloud data. Don't need delay since no commands were
	 * sent to device prior to us reaching here (or delay already handled).
	 */
	const bool enabled = co_await (*livoxProto1.livoxProto1_device_enablePcloudDataCReq)(
		device);

	if (!enabled)
	{
		std::cerr << __func__ << ": Failed to enable pcloud data for dev "
			<< desc->deviceSelector << std::endl;

		co_return StimBuffDeviceOpResult{false, desc};
	}

	if (smoHooksPtr->OptionParser_getOptions().verbose)
	{
		std::cout << __func__ << ": Enabled pcloud data for device: "
			<< desc->deviceSelector << std::endl;
	}

	co_return StimBuffDeviceOpResult{true, desc};
}

sscl::co::ViralNonPostingInvoker<StimBuffDeviceOpResult>
attachBufferAndEnablePcloud(
	const std::shared_ptr<device::DeviceAttachmentSpec> &desc,
	const std::shared_ptr<sscl::ComponentThread> &componentThread,
	const std::shared_ptr<PcloudStimulusProducer> &stimProducer)
{
	// Ensure StimBuffer is attached
	if (!ensureStimBufferAttachedWithoutDuplicates(stimProducer, desc)) {
		co_return StimBuffDeviceOpResult{false, desc};
	}

	// Continue to enable pcloud data if needed
	co_return co_await enablePcloudDataForAttach(
		desc, componentThread, stimProducer->device);
}

sscl::co::ViralNonPostingInvoker<StimBuffDeviceOpResult>
attachToExistingProducer(
	const std::shared_ptr<device::DeviceAttachmentSpec> &desc,
	const std::shared_ptr<sscl::ComponentThread> &componentThread,
	const std::shared_ptr<PcloudStimulusProducer> &stimProducer)
{
	// Case 1: Check if StimBuffer already exists
	auto existingBuffer = stimProducer->getAttachedStimulusBuffer(desc);
	if (existingBuffer)
	{
		// StimBuffer exists, check if pcloud data is active
		if (stimProducer->device && stimProducer->device->pcloudDataActive) {
			// Both StimBuffer and pcloud data are active, early return with success
			co_return StimBuffDeviceOpResult{true, desc};
		}

		// StimBuffer exists but pcloud data is not active, enable it
		co_return co_await enablePcloudDataForAttach(
			desc, componentThread,
			stimProducer->device);
	}

	/**	EXPLANATION:
	 * StimProducer exists, StimBuffer doesn't (DASpec doesn't match)
	 * Check if producer already has a buffer with the requested
	 * qualeIfaceApi but different DASpec - this is not allowed.
	 */
	if (stimProducer->hasBufferWithQualeIfaceApi(desc->qualeIfaceApi))
	{
		std::cerr << __func__ << ": Producer already has a buffer with "
			"qualeIfaceApi '" << desc->qualeIfaceApi
			<< "' but with a different DeviceAttachmentSpec. "
			"A single LivoxGen1 device cannot support multiple DASpecs "
			"with the same qualeIfaceApi."
			<< std::endl;

		co_return StimBuffDeviceOpResult{false, desc};
	}

	// Ensure StimBuffer is attached and enable pcloud data if needed
	co_return co_await attachBufferAndEnablePcloud(
		desc, componentThread, stimProducer);
}

sscl::co::ViralNonPostingInvoker<StimBuffDeviceOpResult>
attachByCreatingProducer(
	const std::shared_ptr<device::DeviceAttachmentSpec> &desc,
	const std::shared_ptr<sscl::ComponentThread> &componentThread)
{
	// StimProducer doesn't exist - need to create device first

	// Parse integer parameters from provider params with defaults
	/**	EXPLANATION:
	 * We may want to add a new param here called "command-delay-ms" to control
	 * the delay we insert between commands sent to the device. 5ms has been
	 * shown to be sufficient for the Livox Avia.
	 */

	/* The Livox Avia will generally respond to a handshake request within
	 * 5ms.
	 */
	/* Based on testing on a Livox Avia, the device will generally resume
	 * sending broadcast advertisement dgrams after about 5 seconds at most.
	 * Generally, it will resume sending them within 1-2 seconds.
	 */
	const LivoxProviderParams params = parseLivoxProviderParams(desc);
	LivoxProto1GetOrCreateDeviceResult deviceResult =
		co_await (*livoxProto1.livoxProto1_getOrCreateDeviceCReq)(
			desc->deviceSelector,
			componentThread,
			params.commandTimeoutMs, params.retryDelayMs,
			params.smoIp, params.smoSubnetNbits,
			params.dataPort, params.cmdPort, params.imuPort);

	if (!deviceResult.success || !deviceResult.device)
	{
		std::cerr << __func__ << ": Failed to create/find Livox device: "
			<< desc->deviceSelector << std::endl;

		co_return StimBuffDeviceOpResult{false, desc};
	}

	// Stash device pointer until after getReturnMode succeeds
	if (smoHooksPtr->OptionParser_getOptions().verbose)
	{
		std::cout << __func__ << ": Successfully attached/found Livox "
			"device: " << desc->deviceSelector << " (ID: "
			<< desc->deviceIdentifier << ")\n";
	}

	/* Delay here because getOrCreate just sent HandshakeReq, so device
	 * may not yet be ready for another command.
	 */
	// Initialize timer with LivoxGen1 metadata io_context
	boost::asio::deadline_timer commandDelayTimer(
		componentThread->getIoContext());
	const bool delayOk = co_await adapters::boostAsio::getDeadlineTimerAReqAwaiter(
		componentThread->getIoContext(),
		commandDelayTimer,
		boost::posix_time::milliseconds(LIVOX_GEN1_DEVICE_COMMAND_DELAY_MS));

	if (!delayOk)
	{
		std::cerr << __func__ << ": Delay timer failed before getReturnMode\n";
		co_return StimBuffDeviceOpResult{false, desc};
	}

	LivoxProto1GetReturnModeResult returnModeResult =
		co_await (*livoxProto1.livoxProto1_device_getReturnModeCReq)(
			deviceResult.device);

	if (!returnModeResult.success)
	{
		std::cerr << __func__ << ": Failed to get return mode for dev "
			<< desc->deviceSelector << std::endl;
		co_return StimBuffDeviceOpResult{false, desc};
	}

	if (smoHooksPtr->OptionParser_getOptions().verbose)
	{
		std::cout << __func__ << ": Got return mode ("
			<< static_cast<int>(returnModeResult.returnMode)
			<< ") for device: " << desc->deviceSelector << std::endl;
	}

	/* Check if PcloudStimulusProducer already exists
	 * (race condition or double-add)
	 */
	auto existingProducer = getStimulusProducer(desc);
	if (existingProducer)
	{
		throw std::runtime_error(
			std::string(__func__) + ": PcloudStimulusProducer already "
			"exists for device " + desc->deviceSelector + " "
			"(race condition or double-add)");
	}

	// Create & add PcloudStimulusProducer to collection since dev now ready
	PcloudStimulusProducer::PcloudFormatDesc formatDesc;
	formatDesc.format = PcloudStimulusProducer::PcloudFormatDesc::Format::XYZI;

	// Parse n-dgrams-per-frame from stim-buff-api params (default: 84)
	const size_t nDgramsPerFrame = parseNDgramsPerFrame(desc);

	auto pcloudDataProducer = std::make_shared<PcloudStimulusProducer>(
		desc, deviceResult.device,
		formatDesc, nDgramsPerFrame);

	addManagedStimulusProducer(pcloudDataProducer, deviceResult.device);

	// Ensure StimBuffer is attached
	co_return co_await attachBufferAndEnablePcloud(
		desc, componentThread, pcloudDataProducer);
}

} // namespace

sscl::co::DynamicViralPostingInvoker<StimBuffDeviceOpResult>
livoxGen1_attachDeviceCReq(
	[[maybe_unused]] sscl::co::ExplicitPostTarget postTarget,
	const std::shared_ptr<device::DeviceAttachmentSpec> &desc,
	const std::shared_ptr<sscl::ComponentThread> &componentThread)
{
	(void)postTarget;
	if (!livoxProto1.livoxProto1_getOrCreateDeviceCReq)
	{
		throw std::runtime_error(
			std::string(__func__) + ": LivoxProto1 getOrCreateDevice function "
			"not available");
	}

	if (!validateAttachRequest(desc)) {
		co_return StimBuffDeviceOpResult{false, desc};
	}

	auto stimProducer = std::dynamic_pointer_cast<PcloudStimulusProducer>(
		getStimulusProducer(desc));

	if (stimProducer)
	{
		co_return co_await attachToExistingProducer(
			desc,
			componentThread,
			stimProducer);
	}

	co_return co_await attachByCreatingProducer(desc, componentThread);
}

sscl::co::DynamicViralPostingInvoker<StimBuffDeviceOpResult>
livoxGen1_detachDeviceCReq(
	[[maybe_unused]] sscl::co::ExplicitPostTarget postTarget,
	const std::shared_ptr<device::DeviceAttachmentSpec> &desc)
{
	(void)postTarget;
	// Case 1: Check if StimBuffer doesn't exist (early return)
	auto stimProducerBase = getStimulusProducer(desc);
	if (!stimProducerBase) {
		// StimProducer doesn't exist, nothing to detach - success
		co_return StimBuffDeviceOpResult{true, desc};
	}

	auto stimProducer = std::dynamic_pointer_cast<PcloudStimulusProducer>(
		stimProducerBase);

	if (!stimProducer)
	{
		throw std::runtime_error(std::string(__func__)
			+ ": Failed to cast StimulusProducer to PcloudStimulusProducer "
			"for device " + desc->deviceSelector);
	}

	// Check if StimBuffer exists
	auto stimBuffer = stimProducer->getAttachedStimulusBuffer(desc);
	if (!stimBuffer) {
		// StimBuffer doesn't exist, nothing to detach - success
		co_return StimBuffDeviceOpResult{true, desc};
	}

	// Case 2: StimBuffer exists - proceed with detach
	auto requestComponentThread = stimProducer->device->componentThread;

	// Remove StimBuffer from collection if it exists
	stimProducer->destroyAttachedStimulusBuffer(stimBuffer);

	// Check if StimProducer has other buffers
	if (!stimProducer->attachedStimulusBuffers.empty()) {
		// Other buffers exist - just remove this buffer, done
		co_return StimBuffDeviceOpResult{true, desc};
	}

	// Last buffer on producer: disable pcloud before tearing down device
	// Disable point cloud data first
	const bool disabled = co_await (*livoxProto1.livoxProto1_device_disablePcloudDataCReq)(
		stimProducer->device);

	if (!disabled)
	{
		std::cerr << __func__ << ": Failed to disable pcloud data for "
			"stim producer " << desc->deviceSelector << std::endl;
		// Fallthrough.
	}

	// Add 5ms delay before destroying device

	// Helper method to delay and then call destroyDeviceReq
	// Initialize timer with LivoxGen1 metadata io_context
	boost::asio::deadline_timer commandDelayTimer(
		requestComponentThread->getIoContext());
	co_await adapters::boostAsio::getDeadlineTimerAReqAwaiter(
		requestComponentThread->getIoContext(),
		commandDelayTimer,
		boost::posix_time::milliseconds(LIVOX_GEN1_DEVICE_COMMAND_DELAY_MS));

	const bool removedOk = co_await removeManagedStimulusProducerIfUnused(
		stimProducer, requestComponentThread);
	if (!removedOk) {
		co_return StimBuffDeviceOpResult{false, desc};
	}

	if (smoHooksPtr->OptionParser_getOptions().verbose) {
		std::cout << __func__ << ": Successfully detached pcloud stim "
			"producer for device " << desc->deviceSelector
			<< " and possibly also destroyed device.\n";
	}

	co_return StimBuffDeviceOpResult{true, desc};
}

sscl::co::ViralNonPostingInvoker<int> livoxGen1_initializeCInd()
{
	if (!smoHooksPtr) {
		throw std::runtime_error(std::string(__func__) + ": SMO hooks "
			"pointers not filled in.");
	}

	// Load LivoxProto1 library
	auto libPath = smoHooksPtr->searchForLibInSmoSearchPaths("liblivoxProto1.so.0");
	livoxProto1.dlopenHandle.reset(dlopen(
		libPath.value_or("liblivoxProto1.so.0").c_str(),
		RTLD_LAZY));
	if (!livoxProto1.dlopenHandle) {
		throw std::runtime_error(
			std::string(__func__) +
			": Failed to load LivoxProto1 library: "
			+ (dlerror() ? dlerror() : "unknown error"));
	}

	// Get LivoxProto1 library functions
	livoxProto1.livoxProto1_main = reinterpret_cast<livoxProto1_mainFn *>(
		dlsym(livoxProto1.dlopenHandle.get(), "livoxProto1_main"));
	livoxProto1.livoxProto1_exit = reinterpret_cast<livoxProto1_exitFn *>(
		dlsym(livoxProto1.dlopenHandle.get(), "livoxProto1_exit"));
	livoxProto1.livoxProto1_getOrCreateDeviceCReq = reinterpret_cast<
		livoxProto1_getOrCreateDeviceCReqFn *>(
			dlsym(
				livoxProto1.dlopenHandle.get(),
				"livoxProto1_getOrCreateDeviceCReq"));
	livoxProto1.livoxProto1_destroyDeviceCReq = reinterpret_cast<
		livoxProto1_destroyDeviceCReqFn *>(
			dlsym(
				livoxProto1.dlopenHandle.get(),
				"livoxProto1_destroyDeviceCReq"));
	livoxProto1.livoxProto1_device_enablePcloudDataCReq = reinterpret_cast<
		livoxProto1_device_enablePcloudDataCReqFn *>(
			dlsym(
				livoxProto1.dlopenHandle.get(),
				"livoxProto1_device_enablePcloudDataCReq"));
	livoxProto1.livoxProto1_device_disablePcloudDataCReq = reinterpret_cast<
		livoxProto1_device_disablePcloudDataCReqFn *>(
			dlsym(
				livoxProto1.dlopenHandle.get(),
				"livoxProto1_device_disablePcloudDataCReq"));
	livoxProto1.livoxProto1_device_getReturnModeCReq = reinterpret_cast<
		livoxProto1_device_getReturnModeCReqFn *>(
			dlsym(
				livoxProto1.dlopenHandle.get(),
				"livoxProto1_device_getReturnModeCReq"));
	livoxProto1.livoxProto1_getPcloudDataFdDesc = reinterpret_cast<
		livoxProto1_getPcloudDataFdDescFn *>(
			dlsym(
				livoxProto1.dlopenHandle.get(),
				"livoxProto1_getPcloudDataFdDesc"));

	if (!livoxProto1.livoxProto1_main
		|| !livoxProto1.livoxProto1_exit
		|| !livoxProto1.livoxProto1_getOrCreateDeviceCReq
		|| !livoxProto1.livoxProto1_destroyDeviceCReq
		|| !livoxProto1.livoxProto1_device_enablePcloudDataCReq
		|| !livoxProto1.livoxProto1_device_disablePcloudDataCReq
		|| !livoxProto1.livoxProto1_device_getReturnModeCReq
		|| !livoxProto1.livoxProto1_getPcloudDataFdDesc)
	{
		throw std::runtime_error(
			std::string(__func__) + ": Failed to get LivoxProto1 library functions");
	}

	(*livoxProto1.livoxProto1_main)(
		smoThreadingModelDesc.componentThread,
		*smoHooksPtr);
	co_return 0;
}

sscl::co::ViralNonPostingInvoker<int> livoxGen1_finalizeCInd()
{
	stopAllManagedProducersBeforeFinalize();

	managedStimulusProducers.clear();
	if (livoxProto1.livoxProto1_exit) {
		(*livoxProto1.livoxProto1_exit)();
	}

	livoxProto1.dlopenHandle.reset(nullptr);
	livoxProto1 = LivoxProto1DllState();
	co_return 0;
}

static const StimBuffApiDesc livoxGen1ApiDesc = {
	.name = "livoxGen1",
	.exportedQualeIfaceApis = {
		{.name = "mesh"},
		{.name = "pcloudIntensity"},
		{.name = "pcloudLightAmbience"},
		{.name = "pcloudDarkAmbience"},
		{.name = "gyro"},
		{.name = "accel"}
	},
	.sal_mgmt_libOps = {
		.initializeCInd = livoxGen1_initializeCInd,
		.finalizeCInd = livoxGen1_finalizeCInd,
		.attachDeviceCReq = livoxGen1_attachDeviceCReq,
		.detachDeviceCReq = livoxGen1_detachDeviceCReq
	}
};

extern "C" SMO_GET_STIM_BUFF_API_DESC_FN_TYPEDEF
	SMO_GET_STIM_BUFF_API_DESC_FN_NAME;

const StimBuffApiDesc& SMO_GET_STIM_BUFF_API_DESC_FN_NAME(
	const SmoCallbacks& callbacks,
	const SmoThreadingModelDesc& threadingModel)
{
	smoHooksPtr = &callbacks;
	smoThreadingModelDesc = threadingModel;
	return livoxGen1ApiDesc;
}

} // namespace smo::stim_buff