#include "emu_settings.h"

#include <atomic>
#include <chrono>
#include <condition_variable>
#include <mutex>

#include "Utilities/Config.h"
#include "Utilities/Thread.h"
#include "Utilities/StrUtil.h"

#include <QMessageBox>
#include <QLineEdit>

#include "Emu/System.h"
#include "Emu/system_config.h"
#if defined(_WIN32) || defined(HAVE_VULKAN)
#include "Emu/RSX/VK/VKHelpers.h"
#endif

#include "3rdparty/OpenAL/include/alext.h"

LOG_CHANNEL(cfg_log, "CFG");

extern std::string g_cfg_defaults; //! Default settings grabbed from Utilities/Config.h

inline std::string sstr(const QString& _in) { return _in.toStdString(); }
inline std::string sstr(const QVariant& _in) { return sstr(_in.toString()); }

// Emit sorted YAML
namespace
{
	static NEVER_INLINE void emitData(YAML::Emitter& out, const YAML::Node& node)
	{
		// TODO
		out << node;
	}

	// Incrementally load YAML
	static NEVER_INLINE void operator +=(YAML::Node& left, const YAML::Node& node)
	{
		if (node && !node.IsNull())
		{
			if (node.IsMap())
			{
				for (const auto& pair : node)
				{
					if (pair.first.IsScalar())
					{
						auto&& lhs = left[pair.first.Scalar()];
						lhs += pair.second;
					}
					else
					{
						// Exotic case (TODO: probably doesn't work)
						auto&& lhs = left[YAML::Clone(pair.first)];
						lhs += pair.second;
					}
				}
			}
			else if (node.IsScalar() || node.IsSequence())
			{
				// Scalars and sequences are replaced completely, but this may change in future.
				// This logic may be overwritten by custom demands of every specific cfg:: node.
				left = node;
			}
		}
	}
}

// Helper methods to interact with YAML and the config settings.
namespace cfg_adapter
{
	static cfg::_base& get_cfg(cfg::_base& root, const std::string& name)
	{
		if (root.get_type() == cfg::type::node)
		{
			for (const auto& pair : static_cast<cfg::node&>(root).get_nodes())
			{
				if (pair.first == name)
				{
					return *pair.second;
				}
			}
		}

		fmt::throw_exception("Node not found: %s", name);
	}

	static cfg::_base& get_cfg(cfg::_base& root, cfg_location::const_iterator begin, cfg_location::const_iterator end)
	{
		return begin == end ? root : get_cfg(get_cfg(root, *begin), begin + 1, end);
	}

	static YAML::Node get_node(const YAML::Node& node, cfg_location::const_iterator begin, cfg_location::const_iterator end)
	{
		return begin == end ? node : get_node(node[*begin], begin + 1, end); // TODO
	}

	/** Syntactic sugar to get a setting at a given config location. */
	static YAML::Node get_node(const YAML::Node& node, cfg_location loc)
	{
		return get_node(node, loc.cbegin(), loc.cend());
	}
}

/** Returns possible options for values for some particular setting.*/
static QStringList getOptions(cfg_location location)
{
	QStringList values;
	auto begin = location.cbegin();
	auto end = location.cend();
	for (const auto& v : cfg_adapter::get_cfg(g_cfg, begin, end).to_list())
	{
		values.append(qstr(v));
	}
	return values;
}

emu_settings::Render_Creator::Render_Creator(const QString& name_null, const QString& name_vulkan, const QString& name_openGL)
	: name_Null(name_null)
	, name_Vulkan(name_vulkan)
	, name_OpenGL(name_openGL)
{
#if defined(WIN32) || defined(HAVE_VULKAN)
	// Some drivers can get stuck when checking for vulkan-compatible gpus, f.ex. if they're waiting for one to get
	// plugged in. This whole contraption is for showing an error message in case that happens, so that user has
	// some idea about why the emulator window isn't showing up.

	static std::atomic<bool> was_called = false;
	if (was_called.exchange(true))
		fmt::throw_exception("Render_Creator cannot be created more than once" HERE);

	static std::mutex mtx;
	static std::condition_variable cond;
	static bool thread_running = true;
	static bool device_found = false;

	static QStringList compatible_gpus;

	std::thread enum_thread = std::thread([&]
	{
		thread_ctrl::set_native_priority(-1);

		vk::context device_enum_context;
		if (device_enum_context.createInstance("RPCS3", true))
		{
			device_enum_context.makeCurrentInstance();
			std::vector<vk::physical_device> &gpus = device_enum_context.enumerateDevices();

			if (!gpus.empty())
			{
				device_found = true;

				for (auto &gpu : gpus)
				{
					compatible_gpus.append(qstr(gpu.get_name()));
				}
			}
		}

		std::scoped_lock{mtx}, thread_running = false;
		cond.notify_all();
	});

	{
		std::unique_lock lck(mtx);
		cond.wait_for(lck, std::chrono::seconds(10), [&]{ return !thread_running; });
	}

	if (thread_running)
	{
		cfg_log.error("Vulkan device enumeration timed out");
		const auto button = QMessageBox::critical(nullptr, tr("Vulkan Check Timeout"),
			tr("Querying for Vulkan-compatible devices is taking too long. This is usually caused by malfunctioning "
			"graphics drivers, reinstalling them could fix the issue.\n\n"
			"Selecting ignore starts the emulator without Vulkan support."),
			QMessageBox::Ignore | QMessageBox::Abort, QMessageBox::Abort);

		enum_thread.detach();
		if (button != QMessageBox::Ignore)
			std::exit(1);

		supportsVulkan = false;
	}
	else
	{
		supportsVulkan = device_found;
		vulkanAdapters = std::move(compatible_gpus);
		enum_thread.join();
	}
#endif

	// Graphics Adapter
	Vulkan = Render_Info(name_Vulkan, vulkanAdapters, supportsVulkan, emu_settings::VulkanAdapter, true);
	OpenGL = Render_Info(name_OpenGL);
	NullRender = Render_Info(name_Null);

	renderers = { &Vulkan, &OpenGL, &NullRender };
}

emu_settings::Microphone_Creator::Microphone_Creator()
{
	RefreshList();
}

void emu_settings::Microphone_Creator::RefreshList()
{
	microphones_list.clear();
	microphones_list.append(mic_none);

	if (alcIsExtensionPresent(NULL, "ALC_ENUMERATION_EXT") == AL_TRUE)
	{
		const char *devices = alcGetString(NULL, ALC_CAPTURE_DEVICE_SPECIFIER);

		while (*devices != 0)
		{
			microphones_list.append(qstr(devices));
			devices += strlen(devices) + 1;
		}
	}
	else
	{
		// Without enumeration we can only use one device
		microphones_list.append(qstr(alcGetString(NULL, ALC_DEFAULT_DEVICE_SPECIFIER)));
	}
}

std::string emu_settings::Microphone_Creator::SetDevice(u32 num, QString& text)
{
	if (text == mic_none)
		sel_list[num-1] = "";
	else
		sel_list[num-1] = text.toStdString();

	const std::string final_list = sel_list[0] + "@@@" + sel_list[1] + "@@@" + sel_list[2] + "@@@" + sel_list[3] + "@@@";
	return final_list;
}

void emu_settings::Microphone_Creator::ParseDevices(std::string list)
{
	for (u32 index = 0; index < 4; index++)
	{
		sel_list[index] = "";
	}

	const auto devices_list = fmt::split(list, { "@@@" });
	for (u32 index = 0; index < std::min<u32>(4, ::size32(devices_list)); index++)
	{
		sel_list[index] = devices_list[index];
	}
}

emu_settings::emu_settings()
	: QObject()
	, m_render_creator(
		GetLocalizedSetting("Null", emu_settings::Renderer, static_cast<int>(video_renderer::null)),
		GetLocalizedSetting("Vulkan", emu_settings::Renderer, static_cast<int>(video_renderer::vulkan)),
		GetLocalizedSetting("OpenGl", emu_settings::Renderer, static_cast<int>(video_renderer::opengl)))
{
}

emu_settings::~emu_settings()
{
}

void emu_settings::LoadSettings(const std::string& title_id)
{
	m_title_id = title_id;

	// Create config path if necessary
	fs::create_path(title_id.empty() ? fs::get_config_dir() : Emulator::GetCustomConfigDir());

	// Load default config
	m_defaultSettings = YAML::Load(g_cfg_defaults);
	m_currentSettings = YAML::Load(g_cfg_defaults);

	// Add global config
	fs::file config(fs::get_config_dir() + "/config.yml", fs::read + fs::write + fs::create);
	m_currentSettings += YAML::Load(config.to_string());
	config.close();

	// Add game config
	if (!title_id.empty())
	{
		const std::string config_path_new = Emulator::GetCustomConfigPath(m_title_id);
		const std::string config_path_old = Emulator::GetCustomConfigPath(m_title_id, true);

		if (fs::is_file(config_path_new))
		{
			config = fs::file(config_path_new, fs::read + fs::write);
			m_currentSettings += YAML::Load(config.to_string());
			config.close();
		}
		else if (fs::is_file(config_path_old))
		{
			config = fs::file(config_path_old, fs::read + fs::write);
			m_currentSettings += YAML::Load(config.to_string());
			config.close();
		}
	}
}

void emu_settings::SaveSettings()
{
	fs::file config;
	YAML::Emitter out;
	emitData(out, m_currentSettings);

	std::string config_name;

	if (m_title_id.empty())
	{
		config_name = fs::get_config_dir() + "/config.yml";
	}
	else
	{
		config_name = Emulator::GetCustomConfigPath(m_title_id);
	}

	config = fs::file(config_name, fs::read + fs::write + fs::create);

	// Save config
	config.seek(0);
	config.trunc(0);
	config.write(out.c_str(), out.size());

	// Check if the running config/title is the same as the edited config/title.
	if (config_name == g_cfg.name || m_title_id == Emu.GetTitleID())
	{
		// Update current config
		g_cfg.from_string(config.to_string(), !Emu.IsStopped());

		if (!Emu.IsStopped()) // Don't spam the log while emulation is stopped. The config will be logged on boot anyway.
		{
			cfg_log.notice("Updated configuration:\n%s\n", g_cfg.to_string());
		}
	}

	config.close();
}

void emu_settings::EnhanceComboBox(QComboBox* combobox, SettingsType type, bool is_ranged, bool use_max, int max, bool sorted)
{
	if (!combobox)
	{
		cfg_log.fatal("EnhanceComboBox '%s' was used with an invalid object", GetSettingName(type));
		return;
	}

	if (is_ranged)
	{
		if (sorted)
		{
			cfg_log.warning("EnhanceCombobox '%s': ignoring sorting request on ranged combo box", GetSettingName(type));
		}

		const QStringList range = GetSettingOptions(type);

		const int max_item = use_max ? max : range.last().toInt();

		for (int i = range.first().toInt(); i <= max_item; i++)
		{
			combobox->addItem(QString::number(i), QVariant(QString::number(i)));
		}
	}
	else
	{
		QStringList settings = GetSettingOptions(type);

		for (const QString& setting : settings)
		{
			const QString localized_setting = GetLocalizedSetting(setting, type, combobox->count());
			combobox->addItem(localized_setting, QVariant(setting));
		}

		if (sorted)
		{
			combobox->model()->sort(0, Qt::AscendingOrder);
		}
	}

	const std::string selected = GetSetting(type);
	const int index = combobox->findData(qstr(selected));

	if (index == -1)
	{
		const std::string def = GetSettingDefault(type);
		cfg_log.fatal("EnhanceComboBox '%s' tried to set an invalid value: %s. Setting to default: %s", GetSettingName(type), selected, def);
		combobox->setCurrentIndex(combobox->findData(qstr(def)));
		m_broken_types.insert(type);
	}
	else
	{
		combobox->setCurrentIndex(index);
	}

	connect(combobox, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged), [=, this](int index)
	{
		SetSetting(type, sstr(combobox->itemData(index)));
	});
}

void emu_settings::EnhanceCheckBox(QCheckBox* checkbox, SettingsType type)
{
	if (!checkbox)
	{
		cfg_log.fatal("EnhanceCheckBox '%s' was used with an invalid object", GetSettingName(type));
		return;
	}

	std::string def = GetSettingDefault(type);
	std::transform(def.begin(), def.end(), def.begin(), ::tolower);

	if (def != "true" && def != "false")
	{
		cfg_log.fatal("EnhanceCheckBox '%s' was used with an invalid SettingsType", GetSettingName(type));
		return;
	}

	std::string selected = GetSetting(type);
	std::transform(selected.begin(), selected.end(), selected.begin(), ::tolower);

	if (selected == "true")
	{
		checkbox->setChecked(true);
	}
	else if (selected != "false")
	{
		cfg_log.fatal("EnhanceCheckBox '%s' tried to set an invalid value: %s. Setting to default: %s", GetSettingName(type), selected, def);
		checkbox->setChecked(def == "true");
		m_broken_types.insert(type);
	}

	connect(checkbox, &QCheckBox::stateChanged, [=, this](int val)
	{
		const std::string str = val != 0 ? "true" : "false";
		SetSetting(type, str);
	});
}

void emu_settings::EnhanceSlider(QSlider* slider, SettingsType type)
{
	if (!slider)
	{
		cfg_log.fatal("EnhanceSlider '%s' was used with an invalid object", GetSettingName(type));
		return;
	}

	const QStringList range = GetSettingOptions(type);
	bool ok_def, ok_sel, ok_min, ok_max;

	const int def = qstr(GetSettingDefault(type)).toInt(&ok_def);
	const int min = range.first().toInt(&ok_min);
	const int max = range.last().toInt(&ok_max);

	if (!ok_def || !ok_min || !ok_max)
	{
		cfg_log.fatal("EnhanceSlider '%s' was used with an invalid SettingsType", GetSettingName(type));
		return;
	}

	const QString selected = qstr(GetSetting(type));
	int val = selected.toInt(&ok_sel);

	if (!ok_sel || val < min || val > max)
	{
		cfg_log.fatal("EnhanceSlider '%s' tried to set an invalid value: %d. Setting to default: %d. Allowed range: [%d, %d]", GetSettingName(type), val, def, min, max);
		val = def;
		m_broken_types.insert(type);
	}

	slider->setRange(min, max);
	slider->setValue(val);

	connect(slider, &QSlider::valueChanged, [=, this](int value)
	{
		SetSetting(type, sstr(value));
	});
}

void emu_settings::EnhanceSpinBox(QSpinBox* spinbox, SettingsType type, const QString& prefix, const QString& suffix)
{
	if (!spinbox)
	{
		cfg_log.fatal("EnhanceSpinBox '%s' was used with an invalid object", GetSettingName(type));
		return;
	}

	const QStringList range = GetSettingOptions(type);
	bool ok_def, ok_sel, ok_min, ok_max;

	const int def = qstr(GetSettingDefault(type)).toInt(&ok_def);
	const int min = range.first().toInt(&ok_min);
	const int max = range.last().toInt(&ok_max);

	if (!ok_def || !ok_min || !ok_max)
	{
		cfg_log.fatal("EnhanceSpinBox '%s' was used with an invalid type", GetSettingName(type));
		return;
	}

	const std::string selected = GetSetting(type);
	int val = qstr(selected).toInt(&ok_sel);

	if (!ok_sel || val < min || val > max)
	{
		cfg_log.fatal("EnhanceSpinBox '%s' tried to set an invalid value: %d. Setting to default: %d. Allowed range: [%d, %d]", GetSettingName(type), selected, def, min, max);
		val = def;
		m_broken_types.insert(type);
	}

	spinbox->setPrefix(prefix);
	spinbox->setSuffix(suffix);
	spinbox->setRange(min, max);
	spinbox->setValue(val);

	connect(spinbox, &QSpinBox::textChanged, [=, this](const QString&/* text*/)
	{
		SetSetting(type, sstr(spinbox->cleanText()));
	});
}

void emu_settings::EnhanceDoubleSpinBox(QDoubleSpinBox* spinbox, SettingsType type, const QString& prefix, const QString& suffix)
{
	if (!spinbox)
	{
		cfg_log.fatal("EnhanceDoubleSpinBox '%s' was used with an invalid object", GetSettingName(type));
		return;
	}

	const QStringList range = GetSettingOptions(type);
	bool ok_def, ok_sel, ok_min, ok_max;

	const double def = qstr(GetSettingDefault(type)).toDouble(&ok_def);
	const double min = range.first().toDouble(&ok_min);
	const double max = range.last().toDouble(&ok_max);

	if (!ok_def || !ok_min || !ok_max)
	{
		cfg_log.fatal("EnhanceDoubleSpinBox '%s' was used with an invalid type", GetSettingName(type));
		return;
	}

	const std::string selected = GetSetting(type);
	double val = qstr(selected).toDouble(&ok_sel);

	if (!ok_sel || val < min || val > max)
	{
		cfg_log.fatal("EnhanceDoubleSpinBox '%s' tried to set an invalid value: %f. Setting to default: %f. Allowed range: [%f, %f]", GetSettingName(type), val, def, min, max);
		val = def;
		m_broken_types.insert(type);
	}

	spinbox->setPrefix(prefix);
	spinbox->setSuffix(suffix);
	spinbox->setRange(min, max);
	spinbox->setValue(val);

	connect(spinbox, &QDoubleSpinBox::textChanged, [=, this](const QString&/* text*/)
	{
		SetSetting(type, sstr(spinbox->cleanText()));
	});
}

void emu_settings::EnhanceEdit(QLineEdit* edit, SettingsType type)
{
	if (!edit)
	{
		cfg_log.fatal("EnhanceEdit '%s' was used with an invalid object", GetSettingName(type));
		return;
	}

	const std::string set_text = GetSetting(type);
	edit->setText(qstr(set_text));

	connect(edit, &QLineEdit::textChanged, [=, this](const QString &text)
	{
		SetSetting(type, sstr(text));
	});
}

std::vector<std::string> emu_settings::GetLoadedLibraries()
{
	return m_currentSettings["Core"]["Load libraries"].as<std::vector<std::string>, std::initializer_list<std::string>>({});
}

void emu_settings::SaveSelectedLibraries(const std::vector<std::string>& libs)
{
	m_currentSettings["Core"]["Load libraries"] = libs;
}

QStringList emu_settings::GetSettingOptions(SettingsType type) const
{
	return getOptions(const_cast<cfg_location&&>(m_settings_location[type]));
}

std::string emu_settings::GetSettingName(SettingsType type) const
{
	const cfg_location loc = m_settings_location[type];
	return loc[loc.size() - 1];
}

std::string emu_settings::GetSettingDefault(SettingsType type) const
{
	return cfg_adapter::get_node(m_defaultSettings, m_settings_location[type]).Scalar();
}

std::string emu_settings::GetSetting(SettingsType type) const
{
	return cfg_adapter::get_node(m_currentSettings, m_settings_location[type]).Scalar();
}

void emu_settings::SetSetting(SettingsType type, const std::string& val)
{
	cfg_adapter::get_node(m_currentSettings, m_settings_location[type]) = val;
}

void emu_settings::OpenCorrectionDialog(QWidget* parent)
{
	if (!m_broken_types.empty() && QMessageBox::question(parent, tr("Fix invalid settings?"),
		tr(
			"Your config file contained one or more unrecognized values for settings.\n"
			"Their default value will be used until they are corrected.\n"
			"Consider that a correction might render them invalid for other versions of RPCS3.\n"
			"\n"
			"Do you wish to let the program correct them for you?\n"
			"This change will only be final when you save the config."
		),
		QMessageBox::Yes | QMessageBox::No, QMessageBox::No) == QMessageBox::Yes)
	{
		for (const auto& type : m_broken_types)
		{
			const std::string def = GetSettingDefault(type);
			const std::string old = GetSetting(type);
			SetSetting(type, def);
			cfg_log.success("The config entry '%s' was corrected from '%s' to '%s'", GetSettingName(type), old, def);
		}

		m_broken_types.clear();
		cfg_log.success("You need to save the settings in order to make these changes permanent!");
	}
}

QString emu_settings::GetLocalizedSetting(const QString& original, SettingsType type, int index) const
{
	switch (type)
	{
	case emu_settings::SPUBlockSize:
		switch (static_cast<spu_block_size_type>(index))
		{
		case spu_block_size_type::safe: return tr("Safe");
		case spu_block_size_type::mega: return tr("Mega");
		case spu_block_size_type::giga: return tr("Giga");
		}
		break;
	case emu_settings::EnableTSX:
		switch (static_cast<tsx_usage>(index))
		{
		case tsx_usage::disabled: return tr("Disabled");
		case tsx_usage::enabled: return tr("Enabled");
		case tsx_usage::forced: return tr("Forced");
		}
		break;
	case emu_settings::Renderer:
		switch (static_cast<video_renderer>(index))
		{
		case video_renderer::null: return tr("Disable Video Output");
		case video_renderer::opengl: return tr("OpenGL");
		case video_renderer::vulkan: return tr("Vulkan");
		}
		break;
	case emu_settings::FrameLimit:
		switch (static_cast<frame_limit_type>(index))
		{
		case frame_limit_type::none: return tr("Off");
		case frame_limit_type::_59_94: return tr("59.94");
		case frame_limit_type::_50: return tr("50");
		case frame_limit_type::_60: return tr("60");
		case frame_limit_type::_30: return tr("30");
		case frame_limit_type::_auto: return tr("Auto");
		}
		break;
	case emu_settings::MSAA:
		switch (static_cast<msaa_level>(index))
		{
		case msaa_level::none: return tr("Disabled");
		case msaa_level::_auto: return tr("Auto");
		}
		break;
	case emu_settings::AudioRenderer:
		switch (static_cast<audio_renderer>(index))
		{
		case audio_renderer::null: return tr("Disable Audio Output");
#ifdef _WIN32
		case audio_renderer::xaudio: return tr("XAudio2");
#endif
#ifdef HAVE_ALSA
		case audio_renderer::alsa: return tr("ALSA");
#endif
#ifdef HAVE_PULSE
		case audio_renderer::pulse: return tr("PulseAudio");
#endif
		case audio_renderer::openal: return tr("OpenAL");
#ifdef HAVE_FAUDIO
		case audio_renderer::faudio: return tr("FAudio");
#endif
		}
		break;
	case emu_settings::MicrophoneType:
		switch (static_cast<microphone_handler>(index))
		{
		case microphone_handler::null: return tr("Disabled");
		case microphone_handler::standard: return tr("Standard");
		case microphone_handler::singstar: return tr("SingStar");
		case microphone_handler::real_singstar: return tr("Real SingStar");
		case microphone_handler::rocksmith: return tr("Rocksmith");
		}
		break;
	case emu_settings::KeyboardHandler:
		switch (static_cast<keyboard_handler>(index))
		{
		case keyboard_handler::null: return tr("Null");
		case keyboard_handler::basic: return tr("Basic");
		}
		break;
	case emu_settings::MouseHandler:
		switch (static_cast<mouse_handler>(index))
		{
		case mouse_handler::null: return tr("Null");
		case mouse_handler::basic: return tr("Basic");
		}
		break;
	case emu_settings::CameraType:
		switch (static_cast<fake_camera_type>(index))
		{
		case fake_camera_type::unknown: return tr("Unknown");
		case fake_camera_type::eyetoy: return tr("EyeToy");
		case fake_camera_type::eyetoy2: return tr("PS Eye");
		case fake_camera_type::uvc1_1: return tr("UVC 1.1");
		}
		break;
	case emu_settings::Camera:
		switch (static_cast<camera_handler>(index))
		{
		case camera_handler::null: return tr("Null");
		case camera_handler::fake: return tr("Fake");
		}
		break;
	case emu_settings::Move:
		switch (static_cast<move_handler>(index))
		{
		case move_handler::null: return tr("Null");
		case move_handler::fake: return tr("Fake");
		case move_handler::mouse: return tr("Mouse");
		}
		break;
	case emu_settings::InternetStatus:
		switch (static_cast<np_internet_status>(index))
		{
		case np_internet_status::disabled: return tr("Disconnected");
		case np_internet_status::enabled: return tr("Connected");
		}
		break;
	case emu_settings::PSNStatus:
		switch (static_cast<np_psn_status>(index))
		{
		case np_psn_status::disabled: return tr("Disconnected");
		case np_psn_status::fake: return tr("Simulated");
		}
		break;
	case emu_settings::SleepTimersAccuracy:
		switch (static_cast<sleep_timers_accuracy_level>(index))
		{
		case sleep_timers_accuracy_level::_as_host: return tr("As Host");
		case sleep_timers_accuracy_level::_usleep: return tr("Usleep Only");
		case sleep_timers_accuracy_level::_all_timers: return tr("All Timers");
		}
		break;
	case emu_settings::PerfOverlayDetailLevel:
		switch (static_cast<detail_level>(index))
		{
		case detail_level::minimal: return tr("Minimal");
		case detail_level::low: return tr("Low");
		case detail_level::medium: return tr("Medium");
		case detail_level::high: return tr("High");
		}
		break;
	case emu_settings::PerfOverlayPosition:
		switch (static_cast<screen_quadrant>(index))
		{
		case screen_quadrant::top_left: return tr("Top Left");
		case screen_quadrant::top_right: return tr("Top Right");
		case screen_quadrant::bottom_left: return tr("Bottom Left");
		case screen_quadrant::bottom_right: return tr("Bottom Right");
		}
		break;
	default:
		break;
	}

	return original;
}