//
//  GuiMenu.cpp
//
//  Main menu.
//  Some submenus are covered in separate source files.
//

#include "guis/GuiMenu.h"

#include "components/OptionListComponent.h"
#include "components/SliderComponent.h"
#include "components/SwitchComponent.h"
#include "guis/GuiCollectionSystemsOptions.h"
#include "guis/GuiComplexTextEditPopup.h"
#include "guis/GuiDetectDevice.h"
#include "guis/GuiGeneralScreensaverOptions.h"
#include "guis/GuiMsgBox.h"
#include "guis/GuiScraperMenu.h"
#include "guis/GuiSettings.h"
#include "views/UIModeController.h"
#include "views/ViewController.h"
#include "views/gamelist/IGameListView.h"
#include "CollectionSystemManager.h"
#include "EmulationStation.h"
#include "FileSorts.h"
#include "Platform.h"
#include "Scripting.h"
#include "SystemData.h"
#include "VolumeControl.h"

#include <algorithm>

#if defined(__linux__) || defined(_WIN64)
#include <SDL2/SDL_events.h>
#else
#include "SDL_events.h"
#endif

GuiMenu::GuiMenu(Window* window) : GuiComponent(window),
        mMenu(window, "MAIN MENU"), mVersion(window)
{
    bool isFullUI = UIModeController::getInstance()->isUIModeFull();

    if (isFullUI)
        addEntry("SCRAPER", 0x777777FF, true, [this] { openScraperSettings(); });

    if (isFullUI)
        addEntry("UI SETTINGS", 0x777777FF, true, [this] { openUISettings(); });

    addEntry("SOUND SETTINGS", 0x777777FF, true, [this] { openSoundSettings(); });

    if (isFullUI)
        addEntry("GAME COLLECTION SETTINGS", 0x777777FF, true, [this] {
                openCollectionSystemSettings(); });

    if (isFullUI)
        addEntry("OTHER SETTINGS", 0x777777FF, true, [this] { openOtherSettings(); });

    if (isFullUI)
        addEntry("CONFIGURE INPUT", 0x777777FF, true, [this] { openConfigInput(); });

    addEntry("QUIT", 0x777777FF, true, [this] {openQuitMenu(); });

    addChild(&mMenu);
    addVersionInfo();
    setSize(mMenu.getSize());
    setPosition((Renderer::getScreenWidth() - mSize.x()) / 2,
            Renderer::getScreenHeight() * 0.15f);
}

void GuiMenu::openScraperSettings()
{
    // Open the scrape menu.
    mWindow->pushGui(new GuiScraperMenu(mWindow));
}

void GuiMenu::openSoundSettings()
{
    auto s = new GuiSettings(mWindow, "SOUND SETTINGS");

    // System volume.
    auto volume = std::make_shared<SliderComponent>(mWindow, 0.f, 100.f, 1.f, "%");
    volume->setValue((float)VolumeControl::getInstance()->getVolume());
    s->addWithLabel("SYSTEM VOLUME", volume);
    s->addSaveFunc([volume] { VolumeControl::getInstance()->
            setVolume((int)Math::round(volume->getValue())); });

    if (UIModeController::getInstance()->isUIModeFull()) {
    // The ALSA Audio Card and Audio Device selection code is disabled at the moment.
    // As PulseAudio controls the sound devices for the desktop environment, it doesn't
    // make much sense to be able to select ALSA devices directly. Normally (always?)
    // the selection doesn't make any difference at all. But maybe some PulseAudio
    // settings could be added later on, if needed.
    // The code is still active for Raspberry Pi though as I'm not sure if this is
    // useful for that device.
    //    #if defined(__linux__)
        #ifdef _RPI_
        // audio card
        auto audio_card = std::make_shared<OptionListComponent<std::string>>
                (mWindow, getHelpStyle(), "AUDIO CARD", false);
        std::vector<std::string> audio_cards;
        #ifdef _RPI_
        // RPi Specific  Audio Cards
        audio_cards.push_back("local");
        audio_cards.push_back("hdmi");
        audio_cards.push_back("both");
        #endif
        audio_cards.push_back("default");
        audio_cards.push_back("sysdefault");
        audio_cards.push_back("dmix");
        audio_cards.push_back("hw");
        audio_cards.push_back("plughw");
        audio_cards.push_back("null");
        if (Settings::getInstance()->getString("AudioCard") != "") {
            if (std::find(audio_cards.begin(), audio_cards.end(),
                    Settings::getInstance()->getString("AudioCard")) == audio_cards.end()) {
                audio_cards.push_back(Settings::getInstance()->getString("AudioCard"));
            }
        }
        for (auto ac = audio_cards.cbegin(); ac != audio_cards.cend(); ac++)
            audio_card->add(*ac, *ac, Settings::getInstance()->getString("AudioCard") == *ac);
        s->addWithLabel("AUDIO CARD", audio_card);
        s->addSaveFunc([audio_card] {
            Settings::getInstance()->setString("AudioCard", audio_card->getSelected());
            VolumeControl::getInstance()->deinit();
            VolumeControl::getInstance()->init();
        });

        // Volume control device.
        auto vol_dev = std::make_shared<OptionListComponent<std::string>>
                (mWindow, getHelpStyle(), "AUDIO DEVICE", false);
        std::vector<std::string> transitions;
        transitions.push_back("PCM");
        transitions.push_back("Speaker");
        transitions.push_back("Master");
        transitions.push_back("Digital");
        transitions.push_back("Analogue");
        if (Settings::getInstance()->getString("AudioDevice") != "") {
            if (std::find(transitions.begin(), transitions.end(),
                    Settings::getInstance()->getString("AudioDevice")) == transitions.end()) {
                transitions.push_back(Settings::getInstance()->getString("AudioDevice"));
            }
        }
        for (auto it = transitions.cbegin(); it != transitions.cend(); it++)
            vol_dev->add(*it, *it, Settings::getInstance()->getString("AudioDevice") == *it);
        s->addWithLabel("AUDIO DEVICE", vol_dev);
        s->addSaveFunc([vol_dev] {
            Settings::getInstance()->setString("AudioDevice", vol_dev->getSelected());
            VolumeControl::getInstance()->deinit();
            VolumeControl::getInstance()->init();
        });
        #endif

        #ifdef _RPI_
        // OMX player Audio Device
        auto omx_audio_dev = std::make_shared<OptionListComponent<std::string>>
                (mWindow, getHelpStyle(), "OMX PLAYER AUDIO DEVICE", false);
        std::vector<std::string> omx_cards;
        // RPi Specific  Audio Cards
        omx_cards.push_back("local");
        omx_cards.push_back("hdmi");
        omx_cards.push_back("both");
        omx_cards.push_back("alsa:hw:0,0");
        omx_cards.push_back("alsa:hw:1,0");
        if (Settings::getInstance()->getString("OMXAudioDev") != "") {
            if (std::find(omx_cards.begin(), omx_cards.end(),
                    Settings::getInstance()->getString("OMXAudioDev")) == omx_cards.end()) {
                omx_cards.push_back(Settings::getInstance()->getString("OMXAudioDev"));
            }
        }
        for (auto it = omx_cards.cbegin(); it != omx_cards.cend(); it++)
            omx_audio_dev->add(*it, *it, Settings::getInstance()->getString("OMXAudioDev") == *it);
        s->addWithLabel("OMX PLAYER AUDIO DEVICE", omx_audio_dev);
        s->addSaveFunc([omx_audio_dev] {
            if (Settings::getInstance()->getString("OMXAudioDev") != omx_audio_dev->getSelected())
                Settings::getInstance()->setString("OMXAudioDev", omx_audio_dev->getSelected());
        });
        #endif

        // Video audio.
        auto video_audio = std::make_shared<SwitchComponent>(mWindow);
        video_audio->setState(Settings::getInstance()->getBool("GamelistVideoAudio"));
        s->addWithLabel("PLAY AUDIO FOR VIDEO FILES IN GAMELIST VIEWS", video_audio);
        s->addSaveFunc([video_audio] { Settings::getInstance()->setBool("GamelistVideoAudio",
                video_audio->getState()); });

        // Navigation sounds.
        auto navigation_sounds = std::make_shared<SwitchComponent>(mWindow);
        navigation_sounds->setState(Settings::getInstance()->
                getBool("NavigationSounds"));
        s->addWithLabel("NAVIGATION SOUNDS", navigation_sounds);
        s->addSaveFunc([navigation_sounds] {
            if (navigation_sounds->getState() &&
                    !Settings::getInstance()->getBool("NavigationSounds") &&
                    PowerSaver::getMode() == PowerSaver::INSTANT) {
                Settings::getInstance()->setString("PowerSaverMode", "default");
                PowerSaver::init();
            }
            Settings::getInstance()->setBool("NavigationSounds",
                    navigation_sounds->getState());
        });
    }

    mWindow->pushGui(s);
}

void GuiMenu::openUISettings()
{
    auto s = new GuiSettings(mWindow, "UI SETTINGS");

    // Optionally start in selected system/gamelist.
    auto systemfocus_list = std::make_shared<OptionListComponent<std::string>>
            (mWindow, getHelpStyle(), "GAMELIST ON STARTUP", false);
    systemfocus_list->add("NONE", "", Settings::getInstance()->getString("StartupSystem") == "");
    for (auto it = SystemData::sSystemVector.cbegin();
            it != SystemData::sSystemVector.cend(); it++) {
        if ("retropie" != (*it)->getName()) {
            systemfocus_list->add((*it)->getName(), (*it)->getName(),
                    Settings::getInstance()->getString("StartupSystem") == (*it)->getName());
        }
    }
    s->addWithLabel("GAMELIST TO SHOW ON STARTUP", systemfocus_list);
    s->addSaveFunc([systemfocus_list] {
        Settings::getInstance()->setString("StartupSystem", systemfocus_list->getSelected());
    });

    // GameList view style.
    auto gamelist_style = std::make_shared<OptionListComponent<std::string>>
            (mWindow, getHelpStyle(), "GAMELIST VIEW STYLE", false);
    std::vector<std::string> styles;
    styles.push_back("automatic");
    styles.push_back("basic");
    styles.push_back("detailed");
    styles.push_back("video");
    styles.push_back("grid");

    for (auto it = styles.cbegin(); it != styles.cend(); it++)
        gamelist_style->add(*it, *it, Settings::getInstance()->
                getString("GamelistViewStyle") == *it);
    s->addWithLabel("GAMELIST VIEW STYLE", gamelist_style);
    s->addSaveFunc([gamelist_style] {
        bool needReload = false;
        if (Settings::getInstance()->getString("GamelistViewStyle") !=
                gamelist_style->getSelected())
            needReload = true;
        Settings::getInstance()->setString("GamelistViewStyle", gamelist_style->getSelected());
        if (needReload)
            ViewController::get()->reloadAll();
    });

    // Transition style.
    auto transition_style = std::make_shared<OptionListComponent<std::string>>
            (mWindow, getHelpStyle(), "TRANSITION STYLE", false);
    std::vector<std::string> transitions;
    transitions.push_back("fade");
    transitions.push_back("slide");
    transitions.push_back("instant");
    for (auto it = transitions.cbegin(); it != transitions.cend(); it++)
        transition_style->add(*it, *it, Settings::getInstance()->
                getString("TransitionStyle") == *it);
    s->addWithLabel("TRANSITION STYLE", transition_style);
    s->addSaveFunc([transition_style] {
        if (Settings::getInstance()->getString("TransitionStyle") == "instant" &&
            transition_style->getSelected() != "instant" &&
            PowerSaver::getMode() == PowerSaver::INSTANT) {
            Settings::getInstance()->setString("PowerSaverMode", "default");
            PowerSaver::init();
        }
        Settings::getInstance()->setString("TransitionStyle", transition_style->getSelected());
    });

    // Theme selection.
    auto themeSets = ThemeData::getThemeSets();

    if (!themeSets.empty()) {
        std::map<std::string, ThemeSet>::const_iterator selectedSet =
                themeSets.find(Settings::getInstance()->getString("ThemeSet"));
        if (selectedSet == themeSets.cend())
            selectedSet = themeSets.cbegin();

        auto theme_set = std::make_shared<OptionListComponent<std::string>>
                (mWindow, getHelpStyle(), "THEME SET", false);
        for (auto it = themeSets.cbegin(); it != themeSets.cend(); it++)
            theme_set->add(it->first, it->first, it == selectedSet);
        s->addWithLabel("THEME SET", theme_set);

        Window* window = mWindow;
        s->addSaveFunc([window, theme_set] {
            bool needReload = false;
            std::string oldTheme = Settings::getInstance()->getString("ThemeSet");
            if (oldTheme != theme_set->getSelected())
                needReload = true;

            Settings::getInstance()->setString("ThemeSet", theme_set->getSelected());

            if (needReload) {
                Scripting::fireEvent("theme-changed", theme_set->getSelected(), oldTheme);
                CollectionSystemManager::get()->updateSystemsList();
                ViewController::get()->goToStart();
                // TODO - replace this with some sort of signal-based implementation.
                ViewController::get()->reloadAll();
            }
        });
    }

    // UI mode.
    auto UImodeSelection = std::make_shared<OptionListComponent<std::string>>
            (mWindow, getHelpStyle(), "UI MODE", false);
    std::vector<std::string> UImodes = UIModeController::getInstance()->getUIModes();
    for (auto it = UImodes.cbegin(); it != UImodes.cend(); it++)
        UImodeSelection->add(*it, *it, Settings::getInstance()->getString("UIMode") == *it);
    s->addWithLabel("UI MODE", UImodeSelection);
    Window* window = mWindow;
    s->addSaveFunc([ UImodeSelection, window, this] {
        std::string selectedMode = UImodeSelection->getSelected();
        if (selectedMode != "full") {
            std::string msg = "YOU ARE CHANGING THE UI TO A RESTRICTED MODE:\n\"" +
                    Utils::String::toUpper(selectedMode) + "\"\n";
            msg += "THIS WILL HIDE MOST MENU OPTIONS TO PREVENT CHANGES TO THE SYSTEM.\n";
            msg += "TO UNLOCK AND RETURN TO THE FULL UI, ENTER THIS CODE: \n";
            msg += "\"" + UIModeController::getInstance()->getFormattedPassKeyStr() + "\"\n\n";
            msg += "DO YOU WANT TO PROCEED?";
            window->pushGui(new GuiMsgBox(window, this->getHelpStyle(), msg,
                "YES", [selectedMode] {
                    LOG(LogDebug) << "Setting UI mode to " << selectedMode;
                    Settings::getInstance()->setString("UIMode", selectedMode);
                    Settings::getInstance()->saveFile();
            }, "NO",nullptr));
        }
    });

    // Default gamelist sort order.
    typedef OptionListComponent<const FileData::SortType*> SortList;
    std::string sortOrder;
    auto defaultSortOrder = std::make_shared<SortList>
            (mWindow, getHelpStyle(), "DEFAULT SORT ORDER", false);
    for (auto it = FileSorts::SortTypes.cbegin(); it != FileSorts::SortTypes.cend(); it++) {
        if (it->description == Settings::getInstance()->getString("DefaultSortOrder")) {
            sortOrder = it->description;
            break;
        }
    }
    // If an invalid sort order was defined in es_settings.cfg, then apply the default
    // sort order 'filename, ascending'.
    if (sortOrder == "")
        sortOrder = "filename, ascending";

    for (auto it = FileSorts::SortTypes.cbegin(); it != FileSorts::SortTypes.cend(); it++) {
        const FileData::SortType& sort = *it;
        if (sort.description == sortOrder)
            defaultSortOrder->add(sort.description, &sort, true);
        else
            defaultSortOrder->add(sort.description, &sort, false);
    }
    s->addWithLabel("DEFAULT SORT ORDER", defaultSortOrder);
    s->addSaveFunc([defaultSortOrder, sortOrder] {
        std::string selectedSortOrder = defaultSortOrder.get()->getSelected()->description;
        if (selectedSortOrder != sortOrder) {
            Settings::getInstance()->setString("DefaultSortOrder", selectedSortOrder);

            // Activate the new sort order by setting up the sort type per system
            // and then resorting all gamelists.
            for (auto it = SystemData::sSystemVector.cbegin(); it !=
                    SystemData::sSystemVector.cend(); it++) {

                bool favoritesSorting;

                if ((*it)->getName() == "recent")
                    continue;

                if (CollectionSystemManager::get()->getIsCustomCollection(*it))
                    favoritesSorting = Settings::getInstance()->getBool("FavFirstCustom");
                else
                    favoritesSorting = Settings::getInstance()->getBool("FavoritesFirst");

                FileData* rootFolder = (*it)->getRootFolder();
                rootFolder->getSystem()->setupSystemSortType(rootFolder);

                rootFolder->sort(getSortTypeFromString(
                        rootFolder->getSortTypeString()), favoritesSorting);
                ViewController::get()->reloadGameListView(*it);

                // Jump to the first row of the gamelist.
                IGameListView* gameList = ViewController::get()->getGameListView((*it)).get();
                gameList->setCursor(gameList->getFirstEntry());

            }
        }
    });

    // Sort favorites on top of the gamelists.
    auto favoritesFirstSwitch = std::make_shared<SwitchComponent>(mWindow);
    favoritesFirstSwitch->setState(Settings::getInstance()->getBool("FavoritesFirst"));
    s->addWithLabel("SORT FAVORITES ON TOP OF GAMELISTS", favoritesFirstSwitch);
    s->addSaveFunc([favoritesFirstSwitch] {
    if (Settings::getInstance()->setBool("FavoritesFirst", favoritesFirstSwitch->getState()))
        for (auto it = SystemData::sSystemVector.cbegin(); it !=
                SystemData::sSystemVector.cend(); it++) {
            // The favorites and recent gamelists never sort favorites on top.
            if ((*it)->getName() == "favorites" || (*it)->getName() == "recent" ||
                    (*it)->getName() == "collections")
                continue;
            // Don't re-sort custom collections as they have their own option
            // for whether to sort favorites on top or not (FavFirstCustom).
            if (CollectionSystemManager::get()->getIsCustomCollection((*it)))
                continue;

            FileData* rootFolder = (*it)->getRootFolder();
            rootFolder->sort(getSortTypeFromString(rootFolder->getSortTypeString()),
                    Settings::getInstance()->getBool("FavoritesFirst"));
            ViewController::get()->reloadGameListView(*it);

            // Jump to the first row of the gamelist.
            IGameListView* gameList = ViewController::get()->getGameListView((*it)).get();
            gameList->setCursor(gameList->getFirstEntry());
        }
    });

    // Enable filters (ForceDisableFilters).
    auto enable_filter = std::make_shared<SwitchComponent>(mWindow);
    enable_filter->setState(!Settings::getInstance()->getBool("ForceDisableFilters"));
    s->addWithLabel("GAMELIST FILTERS", enable_filter);
    s->addSaveFunc([enable_filter] {
        bool filter_is_enabled = !Settings::getInstance()->getBool("ForceDisableFilters");
        Settings::getInstance()->setBool("ForceDisableFilters", !enable_filter->getState());
        if (enable_filter->getState() != filter_is_enabled)
                ViewController::get()->ReloadAndGoToStart();
    });

    // Quick system select (left/right in game list view).
    auto quick_sys_select = std::make_shared<SwitchComponent>(mWindow);
    quick_sys_select->setState(Settings::getInstance()->getBool("QuickSystemSelect"));
    s->addWithLabel("QUICK SYSTEM SELECT", quick_sys_select);
    s->addSaveFunc([quick_sys_select] { Settings::getInstance()->setBool("QuickSystemSelect",
            quick_sys_select->getState()); });

    // Carousel transition option.
    auto move_carousel = std::make_shared<SwitchComponent>(mWindow);
    move_carousel->setState(Settings::getInstance()->getBool("MoveCarousel"));
    s->addWithLabel("CAROUSEL TRANSITIONS", move_carousel);
    s->addSaveFunc([move_carousel] {
        if (move_carousel->getState() &&
            !Settings::getInstance()->getBool("MoveCarousel") &&
            PowerSaver::getMode() == PowerSaver::INSTANT) {
            Settings::getInstance()->setString("PowerSaverMode", "default");
            PowerSaver::init();
        }
        Settings::getInstance()->setBool("MoveCarousel", move_carousel->getState());
    });

    // Show help.
    auto show_help = std::make_shared<SwitchComponent>(mWindow);
    show_help->setState(Settings::getInstance()->getBool("ShowHelpPrompts"));
    s->addWithLabel("ON-SCREEN HELP", show_help);
    s->addSaveFunc([show_help] { Settings::getInstance()->setBool("ShowHelpPrompts",
            show_help->getState()); });

    // Whether to show start menu in Kid Mode.
    auto show_kidstartmenu = std::make_shared<SwitchComponent>(mWindow);
    show_kidstartmenu->setState(Settings::getInstance()->getBool("ShowKidStartMenu"));
    s->addWithLabel("SHOW START MENU IN KID MODE", show_kidstartmenu);
    s->addSaveFunc([show_kidstartmenu] { Settings::getInstance()->setBool("ShowKidStartMenu",
            show_kidstartmenu->getState()); });

    // Screensaver.
    ComponentListRow screensaver_row;
    screensaver_row.elements.clear();
    screensaver_row.addElement(std::make_shared<TextComponent>
            (mWindow, "SCREENSAVER SETTINGS", Font::get(FONT_SIZE_MEDIUM), 0x777777FF), true);
    screensaver_row.addElement(makeArrow(mWindow), false);
    screensaver_row.makeAcceptInputHandler(std::bind(&GuiMenu::openScreensaverOptions, this));
    s->addRow(screensaver_row);

    mWindow->pushGui(s);
}

void GuiMenu::openOtherSettings()
{
    auto s = new GuiSettings(mWindow, "OTHER SETTINGS");

    // Maximum VRAM.
    auto max_vram = std::make_shared<SliderComponent>(mWindow, 0.f, 1000.f, 10.f, "Mb");
    max_vram->setValue((float)(Settings::getInstance()->getInt("MaxVRAM")));
    s->addWithLabel("VRAM LIMIT", max_vram);
    s->addSaveFunc([max_vram] { Settings::getInstance()->setInt("MaxVRAM",
            (int)Math::round(max_vram->getValue())); });

    #ifdef __unix__
    // Fullscreen mode.
    auto fullscreen_mode = std::make_shared<OptionListComponent<std::string>>
            (mWindow, getHelpStyle(), "FULLSCREEN MODE", false);
    std::vector<std::string> screenmode;
    screenmode.push_back("normal");
    screenmode.push_back("borderless");
    for (auto it = screenmode.cbegin(); it != screenmode.cend(); it++)
        fullscreen_mode->add(*it, *it, Settings::getInstance()->getString("FullscreenMode") == *it);
    s->addWithLabel("FULLSCREEN MODE (REQUIRES RESTART)", fullscreen_mode);
    s->addSaveFunc([fullscreen_mode] {
        if (Settings::getInstance()->getString("FullscreenMode") == "normal" &&
            fullscreen_mode->getSelected() != "normal") {
            Settings::getInstance()->setString("PowerSaverMode", "default");
            PowerSaver::init();
        }
        Settings::getInstance()->setString("FullscreenMode", fullscreen_mode->getSelected());
    });
    #endif

    // Power saver.
    auto power_saver = std::make_shared<OptionListComponent<std::string>>
            (mWindow, getHelpStyle(), "POWER SAVER MODES", false);
    std::vector<std::string> modes;
    modes.push_back("disabled");
    modes.push_back("default");
    modes.push_back("enhanced");
    modes.push_back("instant");
    for (auto it = modes.cbegin(); it != modes.cend(); it++)
        power_saver->add(*it, *it, Settings::getInstance()->getString("PowerSaverMode") == *it);
    s->addWithLabel("POWER SAVER MODES", power_saver);
    s->addSaveFunc([this, power_saver] {
        if (Settings::getInstance()->getString("PowerSaverMode") !=
                "instant" && power_saver->getSelected() == "instant") {
            Settings::getInstance()->setString("TransitionStyle", "instant");
            Settings::getInstance()->setBool("MoveCarousel", false);
            Settings::getInstance()->setBool("NavigationSounds", false);
        }
        Settings::getInstance()->setString("PowerSaverMode", power_saver->getSelected());
        PowerSaver::init();
    });

    #ifdef _RPI_
    // Video Player - VideoOmxPlayer.
    auto omx_player = std::make_shared<SwitchComponent>(mWindow);
    omx_player->setState(Settings::getInstance()->getBool("VideoOmxPlayer"));
    s->addWithLabel("USE OMX PLAYER (HW ACCELERATED)", omx_player);
    s->addSaveFunc([omx_player] {
        // Need to reload all views to re-create the right video components.
        bool needReload = false;
        if (Settings::getInstance()->getBool("VideoOmxPlayer") != omx_player->getState())
            needReload = true;

        Settings::getInstance()->setBool("VideoOmxPlayer", omx_player->getState());

        if (needReload)
            ViewController::get()->reloadAll();
    });
    #endif

    // When to save game metadata.
    auto gamelistsSaveMode = std::make_shared<OptionListComponent<std::string>>
            (mWindow, getHelpStyle(), "SAVE METADATA", false);
    std::vector<std::string> saveModes;
    saveModes.push_back("on exit");
    saveModes.push_back("always");
    saveModes.push_back("never");

    for (auto it = saveModes.cbegin(); it != saveModes.cend(); it++) {
        gamelistsSaveMode->add(*it, *it, Settings::getInstance()->
                getString("SaveGamelistsMode") == *it);
    }
    s->addWithLabel("WHEN TO SAVE GAME METADATA", gamelistsSaveMode);
    s->addSaveFunc([gamelistsSaveMode] {
        Settings::getInstance()->setString("SaveGamelistsMode", gamelistsSaveMode->getSelected());
    });

    // Game media directory.
    ComponentListRow row;
    auto mediaDirectory = std::make_shared<TextComponent>(mWindow, "GAME MEDIA DIRECTORY",
            Font::get(FONT_SIZE_MEDIUM), 0x777777FF);
    auto bracket = std::make_shared<ImageComponent>(mWindow);
    bracket->setImage(":/graphics/arrow.svg");
    bracket->setResize(Vector2f(0, Font::get(FONT_SIZE_MEDIUM)->getLetterHeight()));

    row.addElement(mediaDirectory, true);
    row.addElement(bracket, false);

    std::string title = "ENTER GAME MEDIA DIRECTORY";
    std::string mediaDirectoryStaticText = "Default directory:";
    std::string defaultDirectoryText = "~/.emulationstation/downloaded_media/";
    std::string initValue = Settings::getInstance()->getString("MediaDirectory");
    bool multiLine = false;

    auto updateVal = [](const std::string& newVal) {
        Settings::getInstance()->setString("MediaDirectory", newVal);
        Settings::getInstance()->saveFile();
        ViewController::get()->reloadAll();
    };

    row.makeAcceptInputHandler([this, title, mediaDirectoryStaticText,
            defaultDirectoryText, initValue, updateVal, multiLine] {
                mWindow->pushGui(new GuiComplexTextEditPopup(mWindow, getHelpStyle(),
                title, mediaDirectoryStaticText, defaultDirectoryText,
                Settings::getInstance()->getString("MediaDirectory"),
                updateVal, multiLine, "SAVE", "SAVE CHANGES?"));
    });
    s->addRow(row);

    #ifdef _WIN64
    // Hide taskbar during ES program session.
    auto hide_taskbar = std::make_shared<SwitchComponent>(mWindow);
    hide_taskbar->setState(Settings::getInstance()->getBool("HideTaskbar"));
    s->addWithLabel("HIDE TASKBAR (REQUIRES RESTART)", hide_taskbar);
    s->addSaveFunc([hide_taskbar] { Settings::getInstance()->
            setBool("HideTaskbar", hide_taskbar->getState()); });

    // Run ES in the background when a game has been launched.
    auto run_in_background = std::make_shared<SwitchComponent>(mWindow);
    run_in_background->setState(Settings::getInstance()->getBool("RunInBackground"));
    s->addWithLabel("RUN IN BACKGROUND (WHILE GAME IS LAUNCHED)", run_in_background);
    s->addSaveFunc([run_in_background] { Settings::getInstance()->
            setBool("RunInBackground", run_in_background->getState()); });
    #endif

    // Allow overriding of the launch command per game (the option to disable this is
    // intended primarily for testing purposes).
    auto launchcommand_override = std::make_shared<SwitchComponent>(mWindow);
    launchcommand_override->setState(Settings::getInstance()->getBool("LaunchCommandOverride"));
    s->addWithLabel("PER GAME LAUNCH COMMAND OVERRIDE", launchcommand_override);
    s->addSaveFunc([launchcommand_override] { Settings::getInstance()->
            setBool("LaunchCommandOverride", launchcommand_override->getState()); });

    // Hidden files.
    auto hidden_files = std::make_shared<SwitchComponent>(mWindow);
    hidden_files->setState(Settings::getInstance()->getBool("ShowHiddenFiles"));
    s->addWithLabel("SHOW HIDDEN FILES AND FOLDERS (REQUIRES RESTART)", hidden_files);
    s->addSaveFunc([hidden_files] { Settings::getInstance()->setBool("ShowHiddenFiles",
            hidden_files->getState()); });

    // Hidden games.
    auto hidden_games = std::make_shared<SwitchComponent>(mWindow);
    hidden_games->setState(Settings::getInstance()->getBool("ShowHiddenGames"));
    s->addWithLabel("SHOW HIDDEN GAMES (REQUIRES RESTART)", hidden_games);
    s->addSaveFunc([hidden_games] {
        Settings::getInstance()->setBool("ShowHiddenGames",
        hidden_games->getState());
    });

    // Custom event scripts, fired using Scripting::fireEvent().
    auto custom_eventscripts = std::make_shared<SwitchComponent>(mWindow);
    custom_eventscripts->setState(Settings::getInstance()->getBool("CustomEventScripts"));
    s->addWithLabel("CUSTOM EVENT SCRIPTS", custom_eventscripts);
    s->addSaveFunc([custom_eventscripts] { Settings::getInstance()->
            setBool("CustomEventScripts", custom_eventscripts->getState()); });

    auto parse_gamelists = std::make_shared<SwitchComponent>(mWindow);
    parse_gamelists->setState(Settings::getInstance()->getBool("ParseGamelistOnly"));
    s->addWithLabel("ONLY SHOW ROMS FROM GAMELIST.XML FILES", parse_gamelists);
    s->addSaveFunc([parse_gamelists] { Settings::getInstance()->
            setBool("ParseGamelistOnly", parse_gamelists->getState()); });

    auto local_art = std::make_shared<SwitchComponent>(mWindow);
    local_art->setState(Settings::getInstance()->getBool("LocalArt"));
    s->addWithLabel("DISPLAY GAME ART FROM ROM DIRECTORIES", local_art);
    s->addSaveFunc([local_art] { Settings::getInstance()->
            setBool("LocalArt", local_art->getState()); });

    // Framerate.
    auto framerate = std::make_shared<SwitchComponent>(mWindow);
    framerate->setState(Settings::getInstance()->getBool("DrawFramerate"));
    s->addWithLabel("SHOW FRAMERATE", framerate);
    s->addSaveFunc([framerate] { Settings::getInstance()->setBool("DrawFramerate",
            framerate->getState()); });

    // Hide Reboot System option in the quit menu.
    auto show_rebootsystem = std::make_shared<SwitchComponent>(mWindow);
    show_rebootsystem->setState(Settings::getInstance()->getBool("ShowRebootSystem"));
    s->addWithLabel("SHOW \"REBOOT SYSTEM\" MENU ENTRY", show_rebootsystem);
    s->addSaveFunc([show_rebootsystem] { Settings::getInstance()->setBool("ShowRebootSystem",
            show_rebootsystem->getState()); });

    // Hide Power Off System option in the quit menu.
    auto show_poweroffsystem = std::make_shared<SwitchComponent>(mWindow);
    show_poweroffsystem->setState(Settings::getInstance()->getBool("ShowPoweroffSystem"));
    s->addWithLabel("SHOW \"POWER OFF SYSTEM\" MENU ENTRY", show_poweroffsystem);
    s->addSaveFunc([show_poweroffsystem] { Settings::getInstance()->setBool("ShowPoweroffSystem",
            show_poweroffsystem->getState()); });

    mWindow->pushGui(s);
}

void GuiMenu::openConfigInput()
{
    Window* window = mWindow;
    window->pushGui(new GuiMsgBox(window, getHelpStyle(),
            "ARE YOU SURE YOU WANT TO CONFIGURE INPUT?", "YES", [window] {
        window->pushGui(new GuiDetectDevice(window, false, nullptr));
    }, "NO", nullptr)
    );
}

void GuiMenu::openQuitMenu()
{
    auto s = new GuiSettings(mWindow, "QUIT");

    Window* window = mWindow;
    HelpStyle style = getHelpStyle();

    ComponentListRow row;
    if (UIModeController::getInstance()->isUIModeFull()) {
        if (Settings::getInstance()->getBool("ShowExit")) {
            row.makeAcceptInputHandler([window, this] {
                window->pushGui(new GuiMsgBox(window, this->getHelpStyle(),
                    "REALLY QUIT?", "YES", [] {
                        Scripting::fireEvent("quit");
                        quitES();
                }, "NO", nullptr));
            });
            row.addElement(std::make_shared<TextComponent>(window, "QUIT EMULATIONSTATION",
                    Font::get(FONT_SIZE_MEDIUM), 0x777777FF), true);
            s->addRow(row);
        }
    }

    if (Settings::getInstance()->getBool("ShowRebootSystem")) {
        row.elements.clear();
        row.makeAcceptInputHandler([window, this] {
            window->pushGui(new GuiMsgBox(window, this->getHelpStyle(),
                    "REALLY REBOOT?", "YES", [] {
                    Scripting::fireEvent("quit", "reboot");
                    Scripting::fireEvent("reboot");
                    if (quitES(QuitMode::REBOOT) != 0) {
                        LOG(LogWarning) << "Reboot terminated with non-zero result!";
                    }
            }, "NO", nullptr));
        });
        row.addElement(std::make_shared<TextComponent>(window, "REBOOT SYSTEM",
                Font::get(FONT_SIZE_MEDIUM), 0x777777FF), true);
        s->addRow(row);
    }

    if (Settings::getInstance()->getBool("ShowPoweroffSystem")) {
        row.elements.clear();
        row.makeAcceptInputHandler([window, this] {
            window->pushGui(new GuiMsgBox(window, this->getHelpStyle(),
                    "REALLY POWER OFF?", "YES", [] {
                    Scripting::fireEvent("quit", "poweroff");
                    Scripting::fireEvent("poweroff");
                    if (quitES(QuitMode::POWEROFF) != 0) {
                        LOG(LogWarning) << "Power off terminated with non-zero result!";
                    }
            }, "NO", nullptr));
        });
        row.addElement(std::make_shared<TextComponent>(window, "POWER OFF SYSTEM",
                Font::get(FONT_SIZE_MEDIUM), 0x777777FF), true);
        s->addRow(row);
    }

    mWindow->pushGui(s);
}

void GuiMenu::addVersionInfo()
{
    mVersion.setFont(Font::get(FONT_SIZE_SMALL));
    mVersion.setColor(0x5E5E5EFF);
    mVersion.setText("EMULATIONSTATION-DE  V" + Utils::String::toUpper(PROGRAM_VERSION_STRING));
    mVersion.setHorizontalAlignment(ALIGN_CENTER);
    addChild(&mVersion);
}

void GuiMenu::openScreensaverOptions() {
    mWindow->pushGui(new GuiGeneralScreensaverOptions(mWindow, "SCREENSAVER SETTINGS"));
}

void GuiMenu::openCollectionSystemSettings() {
    mWindow->pushGui(new GuiCollectionSystemsOptions(mWindow));
}

void GuiMenu::onSizeChanged()
{
    mVersion.setSize(mSize.x(), 0);
    mVersion.setPosition(0, mSize.y() - mVersion.getSize().y());
}

void GuiMenu::addEntry(const char* name, unsigned int color,
        bool add_arrow, const std::function<void()>& func)
{
    std::shared_ptr<Font> font = Font::get(FONT_SIZE_MEDIUM);

    // Populate the list.
    ComponentListRow row;
    row.addElement(std::make_shared<TextComponent>(mWindow, name, font, color), true);

    if (add_arrow) {
        std::shared_ptr<ImageComponent> bracket = makeArrow(mWindow);
        row.addElement(bracket, false);
    }

    row.makeAcceptInputHandler(func);

    mMenu.addRow(row);
}

void GuiMenu::close(bool closeAllWindows)
{
    std::function<void()> closeFunc;
    if (!closeAllWindows) {
        closeFunc = [this] { delete this; };
    }
    else {
        Window* window = mWindow;
        closeFunc = [window, this] {
            while (window->peekGui() != ViewController::get())
                delete window->peekGui();
        };
    }
    closeFunc();
}

bool GuiMenu::input(InputConfig* config, Input input)
{
    if (GuiComponent::input(config, input))
        return true;

    const bool isStart = config->isMappedTo("start", input);
    if (input.value != 0 && (config->isMappedTo("b", input) || isStart)) {
        close(isStart);
        return true;
    }

    return false;
}

std::vector<HelpPrompt> GuiMenu::getHelpPrompts()
{
    std::vector<HelpPrompt> prompts;
    prompts.push_back(HelpPrompt("up/down", "choose"));
    prompts.push_back(HelpPrompt("a", "select"));
    prompts.push_back(HelpPrompt("b", "close menu"));
    prompts.push_back(HelpPrompt("start", "close menu"));
    return prompts;
}

HelpStyle GuiMenu::getHelpStyle()
{
    HelpStyle style = HelpStyle();
    style.applyTheme(ViewController::get()->getState().getSystem()->getTheme(), "system");
    return style;
}