using Gtk;
using LibHac.Tools.FsSystem;
using Ryujinx.Audio.Backends.OpenAL;
using Ryujinx.Audio.Backends.SDL2;
using Ryujinx.Audio.Backends.SoundIo;
using Ryujinx.Common.Configuration;
using Ryujinx.Common.Configuration.Hid;
using Ryujinx.Common.GraphicsDriver;
using Ryujinx.Configuration;
using Ryujinx.Configuration.System;
using Ryujinx.HLE.FileSystem;
using Ryujinx.HLE.HOS.Services.Time.TimeZone;
using Ryujinx.Ui.Helper;
using Ryujinx.Ui.Widgets;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Reflection;
using System.Threading.Tasks;

using GUI = Gtk.Builder.ObjectAttribute;

namespace Ryujinx.Ui.Windows
{
    public class SettingsWindow : Window
    {
        private readonly MainWindow             _parent;
        private readonly ListStore              _gameDirsBoxStore;
        private readonly ListStore              _audioBackendStore;
        private readonly TimeZoneContentManager _timeZoneContentManager;
        private readonly HashSet<string>        _validTzRegions;

        private long  _systemTimeOffset;
        private float _previousVolumeLevel;

#pragma warning disable CS0649, IDE0044
        [GUI] CheckButton     _errorLogToggle;
        [GUI] CheckButton     _warningLogToggle;
        [GUI] CheckButton     _infoLogToggle;
        [GUI] CheckButton     _stubLogToggle;
        [GUI] CheckButton     _debugLogToggle;
        [GUI] CheckButton     _fileLogToggle;
        [GUI] CheckButton     _guestLogToggle;
        [GUI] CheckButton     _fsAccessLogToggle;
        [GUI] Adjustment      _fsLogSpinAdjustment;
        [GUI] ComboBoxText    _graphicsDebugLevel;
        [GUI] CheckButton     _dockedModeToggle;
        [GUI] CheckButton     _discordToggle;
        [GUI] CheckButton     _checkUpdatesToggle;
        [GUI] CheckButton     _showConfirmExitToggle;
        [GUI] CheckButton     _hideCursorOnIdleToggle;
        [GUI] CheckButton     _vSyncToggle;
        [GUI] CheckButton     _shaderCacheToggle;
        [GUI] CheckButton     _ptcToggle;
        [GUI] CheckButton     _internetToggle;
        [GUI] CheckButton     _fsicToggle;
        [GUI] RadioButton     _mmSoftware;
        [GUI] RadioButton     _mmHost;
        [GUI] RadioButton     _mmHostUnsafe;
        [GUI] CheckButton     _expandRamToggle;
        [GUI] CheckButton     _ignoreToggle;
        [GUI] CheckButton     _directKeyboardAccess;
        [GUI] CheckButton     _directMouseAccess;
        [GUI] ComboBoxText    _systemLanguageSelect;
        [GUI] ComboBoxText    _systemRegionSelect;
        [GUI] Entry           _systemTimeZoneEntry;
        [GUI] EntryCompletion _systemTimeZoneCompletion;
        [GUI] Box             _audioBackendBox;
        [GUI] ComboBox        _audioBackendSelect;
        [GUI] Label           _audioVolumeLabel;
        [GUI] Scale           _audioVolumeSlider;
        [GUI] SpinButton      _systemTimeYearSpin;
        [GUI] SpinButton      _systemTimeMonthSpin;
        [GUI] SpinButton      _systemTimeDaySpin;
        [GUI] SpinButton      _systemTimeHourSpin;
        [GUI] SpinButton      _systemTimeMinuteSpin;
        [GUI] Adjustment      _systemTimeYearSpinAdjustment;
        [GUI] Adjustment      _systemTimeMonthSpinAdjustment;
        [GUI] Adjustment      _systemTimeDaySpinAdjustment;
        [GUI] Adjustment      _systemTimeHourSpinAdjustment;
        [GUI] Adjustment      _systemTimeMinuteSpinAdjustment;
        [GUI] CheckButton     _custThemeToggle;
        [GUI] Entry           _custThemePath;
        [GUI] ToggleButton    _browseThemePath;
        [GUI] Label           _custThemePathLabel;
        [GUI] TreeView        _gameDirsBox;
        [GUI] Entry           _addGameDirBox;
        [GUI] ComboBoxText    _galThreading;
        [GUI] Entry           _graphicsShadersDumpPath;
        [GUI] ComboBoxText    _anisotropy;
        [GUI] ComboBoxText    _aspectRatio;
        [GUI] ComboBoxText    _resScaleCombo;
        [GUI] Entry           _resScaleText;
        [GUI] ToggleButton    _configureController1;
        [GUI] ToggleButton    _configureController2;
        [GUI] ToggleButton    _configureController3;
        [GUI] ToggleButton    _configureController4;
        [GUI] ToggleButton    _configureController5;
        [GUI] ToggleButton    _configureController6;
        [GUI] ToggleButton    _configureController7;
        [GUI] ToggleButton    _configureController8;
        [GUI] ToggleButton    _configureControllerH;

#pragma warning restore CS0649, IDE0044

        public SettingsWindow(MainWindow parent, VirtualFileSystem virtualFileSystem, HLE.FileSystem.Content.ContentManager contentManager) : this(parent, new Builder("Ryujinx.Ui.Windows.SettingsWindow.glade"), virtualFileSystem, contentManager) { }

        private SettingsWindow(MainWindow parent, Builder builder, VirtualFileSystem virtualFileSystem, HLE.FileSystem.Content.ContentManager contentManager) : base(builder.GetObject("_settingsWin").Handle)
        {
            Icon = new Gdk.Pixbuf(Assembly.GetExecutingAssembly(), "Ryujinx.Ui.Resources.Logo_Ryujinx.png");

            _parent = parent;

            builder.Autoconnect(this);

            _timeZoneContentManager = new TimeZoneContentManager();
            _timeZoneContentManager.InitializeInstance(virtualFileSystem, contentManager, IntegrityCheckLevel.None);

            _validTzRegions = new HashSet<string>(_timeZoneContentManager.LocationNameCache.Length, StringComparer.Ordinal); // Zone regions are identifiers. Must match exactly.

            // Bind Events.
            _configureController1.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Player1);
            _configureController2.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Player2);
            _configureController3.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Player3);
            _configureController4.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Player4);
            _configureController5.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Player5);
            _configureController6.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Player6);
            _configureController7.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Player7);
            _configureController8.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Player8);
            _configureControllerH.Pressed += (sender, args) => ConfigureController_Pressed(sender, PlayerIndex.Handheld);
            _systemTimeZoneEntry.FocusOutEvent += TimeZoneEntry_FocusOut;

            _resScaleCombo.Changed += (sender, args) => _resScaleText.Visible = _resScaleCombo.ActiveId == "-1";
            _galThreading.Changed += (sender, args) =>
            {
                if (_galThreading.ActiveId != ConfigurationState.Instance.Graphics.BackendThreading.Value.ToString())
                {
                    GtkDialog.CreateInfoDialog("Warning - Backend Threading", "Ryujinx must be restarted after changing this option for it to apply fully. Depending on your platform, you may need to manually disable your driver's own multithreading when using Ryujinx's.");
                }
            };

            // Setup Currents.
            if (ConfigurationState.Instance.Logger.EnableFileLog)
            {
                _fileLogToggle.Click();
            }

            if (ConfigurationState.Instance.Logger.EnableError)
            {
                _errorLogToggle.Click();
            }

            if (ConfigurationState.Instance.Logger.EnableWarn)
            {
                _warningLogToggle.Click();
            }

            if (ConfigurationState.Instance.Logger.EnableInfo)
            {
                _infoLogToggle.Click();
            }

            if (ConfigurationState.Instance.Logger.EnableStub)
            {
                _stubLogToggle.Click();
            }

            if (ConfigurationState.Instance.Logger.EnableDebug)
            {
                _debugLogToggle.Click();
            }

            if (ConfigurationState.Instance.Logger.EnableGuest)
            {
                _guestLogToggle.Click();
            }

            if (ConfigurationState.Instance.Logger.EnableFsAccessLog)
            {
                _fsAccessLogToggle.Click();
            }

            foreach (GraphicsDebugLevel level in Enum.GetValues(typeof(GraphicsDebugLevel)))
            {
                _graphicsDebugLevel.Append(level.ToString(), level.ToString());
            }

            _graphicsDebugLevel.SetActiveId(ConfigurationState.Instance.Logger.GraphicsDebugLevel.Value.ToString());

            if (ConfigurationState.Instance.System.EnableDockedMode)
            {
                _dockedModeToggle.Click();
            }

            if (ConfigurationState.Instance.EnableDiscordIntegration)
            {
                _discordToggle.Click();
            }

            if (ConfigurationState.Instance.CheckUpdatesOnStart)
            {
                _checkUpdatesToggle.Click();
            }

            if (ConfigurationState.Instance.ShowConfirmExit)
            {
                _showConfirmExitToggle.Click();
            }

            if (ConfigurationState.Instance.HideCursorOnIdle)
            {
                _hideCursorOnIdleToggle.Click();
            }

            if (ConfigurationState.Instance.Graphics.EnableVsync)
            {
                _vSyncToggle.Click();
            }

            if (ConfigurationState.Instance.Graphics.EnableShaderCache)
            {
                _shaderCacheToggle.Click();
            }

            if (ConfigurationState.Instance.System.EnablePtc)
            {
                _ptcToggle.Click();
            }

            if (ConfigurationState.Instance.System.EnableInternetAccess)
            {
                _internetToggle.Click();
            }

            if (ConfigurationState.Instance.System.EnableFsIntegrityChecks)
            {
                _fsicToggle.Click();
            }

            switch (ConfigurationState.Instance.System.MemoryManagerMode.Value)
            {
                case MemoryManagerMode.SoftwarePageTable:
                    _mmSoftware.Click();
                    break;
                case MemoryManagerMode.HostMapped:
                    _mmHost.Click();
                    break;
                case MemoryManagerMode.HostMappedUnsafe:
                    _mmHostUnsafe.Click();
                    break;
            }

            if (ConfigurationState.Instance.System.ExpandRam)
            {
                _expandRamToggle.Click();
            }

            if (ConfigurationState.Instance.System.IgnoreMissingServices)
            {
                _ignoreToggle.Click();
            }

            if (ConfigurationState.Instance.Hid.EnableKeyboard)
            {
                _directKeyboardAccess.Click();
            }

            if (ConfigurationState.Instance.Hid.EnableMouse)
            {
                _directMouseAccess.Click();
            }

            if (ConfigurationState.Instance.Ui.EnableCustomTheme)
            {
                _custThemeToggle.Click();
            }

            // Custom EntryCompletion Columns. If added to glade, need to override more signals
            ListStore tzList = new ListStore(typeof(string), typeof(string), typeof(string));
            _systemTimeZoneCompletion.Model = tzList;

            CellRendererText offsetCol = new CellRendererText();
            CellRendererText abbrevCol = new CellRendererText();

            _systemTimeZoneCompletion.PackStart(offsetCol, false);
            _systemTimeZoneCompletion.AddAttribute(offsetCol, "text", 0);
            _systemTimeZoneCompletion.TextColumn = 1; // Regions Column
            _systemTimeZoneCompletion.PackStart(abbrevCol, false);
            _systemTimeZoneCompletion.AddAttribute(abbrevCol, "text", 2);

            int maxLocationLength = 0;

            foreach (var (offset, location, abbr) in _timeZoneContentManager.ParseTzOffsets())
            {
                var hours = Math.DivRem(offset, 3600, out int seconds);
                var minutes = Math.Abs(seconds) / 60;

                var abbr2 = (abbr.StartsWith('+') || abbr.StartsWith('-')) ? string.Empty : abbr;

                tzList.AppendValues($"UTC{hours:+0#;-0#;+00}:{minutes:D2} ", location, abbr2);
                _validTzRegions.Add(location);

                maxLocationLength = Math.Max(maxLocationLength, location.Length);
            }

            _systemTimeZoneEntry.WidthChars = Math.Max(20, maxLocationLength + 1); // Ensure minimum Entry width
            _systemTimeZoneEntry.Text = _timeZoneContentManager.SanityCheckDeviceLocationName(ConfigurationState.Instance.System.TimeZone);

            _systemTimeZoneCompletion.MatchFunc = TimeZoneMatchFunc;

            _systemLanguageSelect.SetActiveId(ConfigurationState.Instance.System.Language.Value.ToString());
            _systemRegionSelect.SetActiveId(ConfigurationState.Instance.System.Region.Value.ToString());
            _galThreading.SetActiveId(ConfigurationState.Instance.Graphics.BackendThreading.Value.ToString());
            _resScaleCombo.SetActiveId(ConfigurationState.Instance.Graphics.ResScale.Value.ToString());
            _anisotropy.SetActiveId(ConfigurationState.Instance.Graphics.MaxAnisotropy.Value.ToString());
            _aspectRatio.SetActiveId(((int)ConfigurationState.Instance.Graphics.AspectRatio.Value).ToString());

            _custThemePath.Buffer.Text           = ConfigurationState.Instance.Ui.CustomThemePath;
            _resScaleText.Buffer.Text            = ConfigurationState.Instance.Graphics.ResScaleCustom.Value.ToString();
            _resScaleText.Visible                = _resScaleCombo.ActiveId == "-1";
            _graphicsShadersDumpPath.Buffer.Text = ConfigurationState.Instance.Graphics.ShadersDumpPath;
            _fsLogSpinAdjustment.Value           = ConfigurationState.Instance.System.FsGlobalAccessLogMode;
            _systemTimeOffset                    = ConfigurationState.Instance.System.SystemTimeOffset;

            _gameDirsBox.AppendColumn("", new CellRendererText(), "text", 0);
            _gameDirsBoxStore  = new ListStore(typeof(string));
            _gameDirsBox.Model = _gameDirsBoxStore;

            foreach (string gameDir in ConfigurationState.Instance.Ui.GameDirs.Value)
            {
                _gameDirsBoxStore.AppendValues(gameDir);
            }

            if (_custThemeToggle.Active == false)
            {
                _custThemePath.Sensitive      = false;
                _custThemePathLabel.Sensitive = false;
                _browseThemePath.Sensitive    = false;
            }

            //Setup system time spinners
            UpdateSystemTimeSpinners();

            _audioBackendStore = new ListStore(typeof(string), typeof(AudioBackend));

            TreeIter openAlIter  = _audioBackendStore.AppendValues("OpenAL", AudioBackend.OpenAl);
            TreeIter soundIoIter = _audioBackendStore.AppendValues("SoundIO", AudioBackend.SoundIo);
            TreeIter sdl2Iter    = _audioBackendStore.AppendValues("SDL2", AudioBackend.SDL2);
            TreeIter dummyIter   = _audioBackendStore.AppendValues("Dummy", AudioBackend.Dummy);

            _audioBackendSelect = ComboBox.NewWithModelAndEntry(_audioBackendStore);
            _audioBackendSelect.EntryTextColumn = 0;
            _audioBackendSelect.Entry.IsEditable = false;

            switch (ConfigurationState.Instance.System.AudioBackend.Value)
            {
                case AudioBackend.OpenAl:
                    _audioBackendSelect.SetActiveIter(openAlIter);
                    break;
                case AudioBackend.SoundIo:
                    _audioBackendSelect.SetActiveIter(soundIoIter);
                    break;
                case AudioBackend.SDL2:
                    _audioBackendSelect.SetActiveIter(sdl2Iter);
                    break;
                case AudioBackend.Dummy:
                    _audioBackendSelect.SetActiveIter(dummyIter);
                    break;
                default:
                    throw new ArgumentOutOfRangeException();
            }

            _audioBackendBox.Add(_audioBackendSelect);
            _audioBackendSelect.Show();

            _previousVolumeLevel            = ConfigurationState.Instance.System.AudioVolume;
            _audioVolumeLabel               = new Label("Volume: ");
            _audioVolumeSlider              = new Scale(Orientation.Horizontal, 0, 100, 1);
            _audioVolumeLabel.MarginStart   = 10;
            _audioVolumeSlider.ValuePos     = PositionType.Right;
            _audioVolumeSlider.WidthRequest = 200;

            _audioVolumeSlider.Value        =  _previousVolumeLevel * 100;
            _audioVolumeSlider.ValueChanged += VolumeSlider_OnChange;
            _audioBackendBox.Add(_audioVolumeLabel);
            _audioBackendBox.Add(_audioVolumeSlider);
            _audioVolumeLabel.Show();
            _audioVolumeSlider.Show();

            bool openAlIsSupported  = false;
            bool soundIoIsSupported = false;
            bool sdl2IsSupported    = false;

            Task.Run(() =>
            {
                openAlIsSupported  = OpenALHardwareDeviceDriver.IsSupported;
                soundIoIsSupported = SoundIoHardwareDeviceDriver.IsSupported;
                sdl2IsSupported    = SDL2HardwareDeviceDriver.IsSupported;
            });

            // This function runs whenever the dropdown is opened
            _audioBackendSelect.SetCellDataFunc(_audioBackendSelect.Cells[0], (layout, cell, model, iter) =>
            {
                cell.Sensitive = ((AudioBackend)_audioBackendStore.GetValue(iter, 1)) switch
                {
                    AudioBackend.OpenAl  => openAlIsSupported,
                    AudioBackend.SoundIo => soundIoIsSupported,
                    AudioBackend.SDL2    => sdl2IsSupported,
                    AudioBackend.Dummy   => true,
                    _ => throw new ArgumentOutOfRangeException()
                };
            });
        }

        private void UpdateSystemTimeSpinners()
        {
            //Bind system time events
            _systemTimeYearSpin.ValueChanged   -= SystemTimeSpin_ValueChanged;
            _systemTimeMonthSpin.ValueChanged  -= SystemTimeSpin_ValueChanged;
            _systemTimeDaySpin.ValueChanged    -= SystemTimeSpin_ValueChanged;
            _systemTimeHourSpin.ValueChanged   -= SystemTimeSpin_ValueChanged;
            _systemTimeMinuteSpin.ValueChanged -= SystemTimeSpin_ValueChanged;

            //Apply actual system time + SystemTimeOffset to system time spin buttons
            DateTime systemTime = DateTime.Now.AddSeconds(_systemTimeOffset);

            _systemTimeYearSpinAdjustment.Value   = systemTime.Year;
            _systemTimeMonthSpinAdjustment.Value  = systemTime.Month;
            _systemTimeDaySpinAdjustment.Value    = systemTime.Day;
            _systemTimeHourSpinAdjustment.Value   = systemTime.Hour;
            _systemTimeMinuteSpinAdjustment.Value = systemTime.Minute;

            //Format spin buttons text to include leading zeros
            _systemTimeYearSpin.Text   = systemTime.Year.ToString("0000");
            _systemTimeMonthSpin.Text  = systemTime.Month.ToString("00");
            _systemTimeDaySpin.Text    = systemTime.Day.ToString("00");
            _systemTimeHourSpin.Text   = systemTime.Hour.ToString("00");
            _systemTimeMinuteSpin.Text = systemTime.Minute.ToString("00");

            //Bind system time events
            _systemTimeYearSpin.ValueChanged   += SystemTimeSpin_ValueChanged;
            _systemTimeMonthSpin.ValueChanged  += SystemTimeSpin_ValueChanged;
            _systemTimeDaySpin.ValueChanged    += SystemTimeSpin_ValueChanged;
            _systemTimeHourSpin.ValueChanged   += SystemTimeSpin_ValueChanged;
            _systemTimeMinuteSpin.ValueChanged += SystemTimeSpin_ValueChanged;
        }

        private void SaveSettings()
        {
            List<string> gameDirs = new List<string>();

            _gameDirsBoxStore.GetIterFirst(out TreeIter treeIter);
            for (int i = 0; i < _gameDirsBoxStore.IterNChildren(); i++)
            {
                gameDirs.Add((string)_gameDirsBoxStore.GetValue(treeIter, 0));

                _gameDirsBoxStore.IterNext(ref treeIter);
            }

            if (!float.TryParse(_resScaleText.Buffer.Text, out float resScaleCustom) || resScaleCustom <= 0.0f)
            {
                resScaleCustom = 1.0f;
            }

            if (_validTzRegions.Contains(_systemTimeZoneEntry.Text))
            {
                ConfigurationState.Instance.System.TimeZone.Value = _systemTimeZoneEntry.Text;
            }

            MemoryManagerMode memoryMode = MemoryManagerMode.SoftwarePageTable;

            if (_mmHost.Active)
            {
                memoryMode = MemoryManagerMode.HostMapped;
            }

            if (_mmHostUnsafe.Active)
            {
                memoryMode = MemoryManagerMode.HostMappedUnsafe;
            }

            BackendThreading backendThreading = Enum.Parse<BackendThreading>(_galThreading.ActiveId);
            if (ConfigurationState.Instance.Graphics.BackendThreading != backendThreading)
            {
                DriverUtilities.ToggleOGLThreading(backendThreading == BackendThreading.Off);
            }

            ConfigurationState.Instance.Logger.EnableError.Value               = _errorLogToggle.Active;
            ConfigurationState.Instance.Logger.EnableWarn.Value                = _warningLogToggle.Active;
            ConfigurationState.Instance.Logger.EnableInfo.Value                = _infoLogToggle.Active;
            ConfigurationState.Instance.Logger.EnableStub.Value                = _stubLogToggle.Active;
            ConfigurationState.Instance.Logger.EnableDebug.Value               = _debugLogToggle.Active;
            ConfigurationState.Instance.Logger.EnableGuest.Value               = _guestLogToggle.Active;
            ConfigurationState.Instance.Logger.EnableFsAccessLog.Value         = _fsAccessLogToggle.Active;
            ConfigurationState.Instance.Logger.EnableFileLog.Value             = _fileLogToggle.Active;
            ConfigurationState.Instance.Logger.GraphicsDebugLevel.Value        = Enum.Parse<GraphicsDebugLevel>(_graphicsDebugLevel.ActiveId);
            ConfigurationState.Instance.System.EnableDockedMode.Value          = _dockedModeToggle.Active;
            ConfigurationState.Instance.EnableDiscordIntegration.Value         = _discordToggle.Active;
            ConfigurationState.Instance.CheckUpdatesOnStart.Value              = _checkUpdatesToggle.Active;
            ConfigurationState.Instance.ShowConfirmExit.Value                  = _showConfirmExitToggle.Active;
            ConfigurationState.Instance.HideCursorOnIdle.Value                 = _hideCursorOnIdleToggle.Active;
            ConfigurationState.Instance.Graphics.EnableVsync.Value             = _vSyncToggle.Active;
            ConfigurationState.Instance.Graphics.EnableShaderCache.Value       = _shaderCacheToggle.Active;
            ConfigurationState.Instance.System.EnablePtc.Value                 = _ptcToggle.Active;
            ConfigurationState.Instance.System.EnableInternetAccess.Value      = _internetToggle.Active;
            ConfigurationState.Instance.System.EnableFsIntegrityChecks.Value   = _fsicToggle.Active;
            ConfigurationState.Instance.System.MemoryManagerMode.Value         = memoryMode;
            ConfigurationState.Instance.System.ExpandRam.Value                 = _expandRamToggle.Active;
            ConfigurationState.Instance.System.IgnoreMissingServices.Value     = _ignoreToggle.Active;
            ConfigurationState.Instance.Hid.EnableKeyboard.Value               = _directKeyboardAccess.Active;
            ConfigurationState.Instance.Hid.EnableMouse.Value                  = _directMouseAccess.Active;
            ConfigurationState.Instance.Ui.EnableCustomTheme.Value             = _custThemeToggle.Active;
            ConfigurationState.Instance.System.Language.Value                  = Enum.Parse<Language>(_systemLanguageSelect.ActiveId);
            ConfigurationState.Instance.System.Region.Value                    = Enum.Parse<Configuration.System.Region>(_systemRegionSelect.ActiveId);
            ConfigurationState.Instance.System.SystemTimeOffset.Value          = _systemTimeOffset;
            ConfigurationState.Instance.Ui.CustomThemePath.Value               = _custThemePath.Buffer.Text;
            ConfigurationState.Instance.Graphics.ShadersDumpPath.Value         = _graphicsShadersDumpPath.Buffer.Text;
            ConfigurationState.Instance.Ui.GameDirs.Value                      = gameDirs;
            ConfigurationState.Instance.System.FsGlobalAccessLogMode.Value     = (int)_fsLogSpinAdjustment.Value;
            ConfigurationState.Instance.Graphics.MaxAnisotropy.Value           = float.Parse(_anisotropy.ActiveId, CultureInfo.InvariantCulture);
            ConfigurationState.Instance.Graphics.AspectRatio.Value             = Enum.Parse<AspectRatio>(_aspectRatio.ActiveId);
            ConfigurationState.Instance.Graphics.BackendThreading.Value        = backendThreading;
            ConfigurationState.Instance.Graphics.ResScale.Value                = int.Parse(_resScaleCombo.ActiveId);
            ConfigurationState.Instance.Graphics.ResScaleCustom.Value          = resScaleCustom;
            ConfigurationState.Instance.System.AudioVolume.Value               = (float)_audioVolumeSlider.Value / 100.0f;

            _previousVolumeLevel = ConfigurationState.Instance.System.AudioVolume.Value;

            if (_audioBackendSelect.GetActiveIter(out TreeIter activeIter))
            {
                ConfigurationState.Instance.System.AudioBackend.Value = (AudioBackend)_audioBackendStore.GetValue(activeIter, 1);
            }

            ConfigurationState.Instance.ToFileFormat().SaveConfig(Program.ConfigurationPath);
            _parent.UpdateGraphicsConfig();
            ThemeHelper.ApplyTheme();
        }

        //
        // Events
        //
        private void TimeZoneEntry_FocusOut(object sender, FocusOutEventArgs e)
        {
            if (!_validTzRegions.Contains(_systemTimeZoneEntry.Text))
            {
                _systemTimeZoneEntry.Text = _timeZoneContentManager.SanityCheckDeviceLocationName(ConfigurationState.Instance.System.TimeZone);
            }
        }

        private bool TimeZoneMatchFunc(EntryCompletion compl, string key, TreeIter iter)
        {
            key = key.Trim().Replace(' ', '_');

            return ((string)compl.Model.GetValue(iter, 1)).Contains(key, StringComparison.OrdinalIgnoreCase) || // region
                   ((string)compl.Model.GetValue(iter, 2)).StartsWith(key, StringComparison.OrdinalIgnoreCase) || // abbr
                   ((string)compl.Model.GetValue(iter, 0))[3..].StartsWith(key); // offset
        }

        private void SystemTimeSpin_ValueChanged(object sender, EventArgs e)
        {
            int year   = _systemTimeYearSpin.ValueAsInt;
            int month  = _systemTimeMonthSpin.ValueAsInt;
            int day    = _systemTimeDaySpin.ValueAsInt;
            int hour   = _systemTimeHourSpin.ValueAsInt;
            int minute = _systemTimeMinuteSpin.ValueAsInt;

            if (!DateTime.TryParse(year + "-" + month + "-" + day + " " + hour + ":" + minute, out DateTime newTime))
            {
                UpdateSystemTimeSpinners();

                return;
            }

            newTime = newTime.AddSeconds(DateTime.Now.Second).AddMilliseconds(DateTime.Now.Millisecond);

            long systemTimeOffset = (long)Math.Ceiling((newTime - DateTime.Now).TotalMinutes) * 60L;

            if (_systemTimeOffset != systemTimeOffset)
            {
                _systemTimeOffset = systemTimeOffset;
                UpdateSystemTimeSpinners();
            }
        }

        private void AddDir_Pressed(object sender, EventArgs args)
        {
            if (Directory.Exists(_addGameDirBox.Buffer.Text))
            {
                _gameDirsBoxStore.AppendValues(_addGameDirBox.Buffer.Text);
            }
            else
            {
                FileChooserNative fileChooser = new FileChooserNative("Choose the game directory to add to the list", this, FileChooserAction.SelectFolder, "Add", "Cancel")
                {
                    SelectMultiple = true
                };

                if (fileChooser.Run() == (int)ResponseType.Accept)
                {
                    foreach (string directory in fileChooser.Filenames)
                    {
                        bool directoryAdded = false;

                        if (_gameDirsBoxStore.GetIterFirst(out TreeIter treeIter))
                        {
                            do
                            {
                                if (directory.Equals((string)_gameDirsBoxStore.GetValue(treeIter, 0)))
                                {
                                    directoryAdded = true;
                                    break;
                                }
                            } while(_gameDirsBoxStore.IterNext(ref treeIter));
                        }

                        if (!directoryAdded)
                        {
                            _gameDirsBoxStore.AppendValues(directory);
                        }
                    }
                }

                fileChooser.Dispose();
            }

            _addGameDirBox.Buffer.Text = "";

            ((ToggleButton)sender).SetStateFlags(StateFlags.Normal, true);
        }

        private void RemoveDir_Pressed(object sender, EventArgs args)
        {
            TreeSelection selection = _gameDirsBox.Selection;

            if (selection.GetSelected(out TreeIter treeIter))
            {
                _gameDirsBoxStore.Remove(ref treeIter);
            }

            ((ToggleButton)sender).SetStateFlags(StateFlags.Normal, true);
        }

        private void CustThemeToggle_Activated(object sender, EventArgs args)
        {
            _custThemePath.Sensitive      = _custThemeToggle.Active;
            _custThemePathLabel.Sensitive = _custThemeToggle.Active;
            _browseThemePath.Sensitive    = _custThemeToggle.Active;
        }

        private void BrowseThemeDir_Pressed(object sender, EventArgs args)
        {
            using (FileChooserNative fileChooser = new FileChooserNative("Choose the theme to load", this, FileChooserAction.Open, "Select", "Cancel"))
            {
                FileFilter filter = new FileFilter()
                {
                    Name = "Theme Files"
                };
                filter.AddPattern("*.css");

                fileChooser.AddFilter(filter);

                if (fileChooser.Run() == (int)ResponseType.Accept)
                {
                    _custThemePath.Buffer.Text = fileChooser.Filename;
                }
            }

            _browseThemePath.SetStateFlags(StateFlags.Normal, true);
        }

        private void ConfigureController_Pressed(object sender, PlayerIndex playerIndex)
        {
            ((ToggleButton)sender).SetStateFlags(StateFlags.Normal, true);

            ControllerWindow controllerWindow = new ControllerWindow(_parent, playerIndex);

            controllerWindow.SetSizeRequest((int)(controllerWindow.DefaultWidth * Program.WindowScaleFactor), (int)(controllerWindow.DefaultHeight * Program.WindowScaleFactor));
            controllerWindow.Show();
        }

        private void VolumeSlider_OnChange(object sender, EventArgs args)
        {
            ConfigurationState.Instance.System.AudioVolume.Value = (float)(_audioVolumeSlider.Value / 100);
        }

        private void SaveToggle_Activated(object sender, EventArgs args)
        {
            SaveSettings();
            Dispose();
        }

        private void ApplyToggle_Activated(object sender, EventArgs args)
        {
            SaveSettings();
        }

        private void CloseToggle_Activated(object sender, EventArgs args)
        {
            ConfigurationState.Instance.System.AudioVolume.Value = _previousVolumeLevel;
            Dispose();
        }
    }
}