public class ReactionTest : INotifyPropertyChanged, IProgress<float>, IComparable<ReactionTest>

    {

        public enum TestState

        {

            Unset = -1,

            Untested,

            Scanning,

            LabNotFound,

            ClippedResult,

            GoodResult,

            Saved

        }

        public Reagent Reagent1 { get; }

        public Reagent Reagent2 { get; }

        {

            set

            {

                NotifyPropertyChanged(nameof(CanScan));

            }

        }

        private ClipType _clipType;

        public ClipType Clipped {

            get => _clipType;

            set

            {

                _clipType = value;

                NotifyPropertyChanged(nameof(Clipped));

            }

        }

        public bool IsAllCatalysts { get; }

        private Reaction? _reaction;

        public TestState State

        {

            get => _state;

            set

            {

                _state = value;

                NotifyPropertyChanged(nameof(State));

                NotifyPropertyChanged(nameof(Requires3Way));

                NotifyPropertyChanged(nameof(CanScan));

                NotifyPropertyChanged(nameof(IsScanning));

                NotifyPropertyChanged(nameof(HasResults));

                NotifyPropertyChanged(nameof(HasReaction));

                NotifyPropertyChanged(nameof(CanClear));

                NotifyPropertyChanged(nameof(CanSave));

                NotifyPropertyChanged(nameof(NoLab));

                NotifyPropertyChanged(nameof(CanPickBuffer));

            }

        }

        public bool Requires3Way =>

            (State == TestState.ClippedResult) || IsAllCatalysts;

        public bool IsScanning => State == TestState.Scanning;

        public bool HasResults => (ObservedColor != null) && (State is TestState.ClippedResult or TestState.GoodResult or TestState.LabNotFound);

        public bool HasReaction => State is TestState.ClippedResult or TestState.GoodResult or TestState.Saved;

        public bool CanClear => State is TestState.ClippedResult or TestState.GoodResult or TestState.Saved;

        public bool CanSave => State == TestState.GoodResult;

        public bool NoLab => State == TestState.LabNotFound;

        public bool CanPickBuffer => (State == TestState.ClippedResult) || IsAllCatalysts;

        private PaintColor? _hypotheticalColor;

        public PaintColor? HypotheticalColor { get => _hypotheticalColor; set { _hypotheticalColor = value; NotifyPropertyChanged(nameof(HypotheticalColor)); } }

        private PaintColor? _observedColor;

        public PaintColor? ObservedColor { get => _observedColor; set { _observedColor = value; NotifyPropertyChanged(nameof(ObservedColor)); } }

        private readonly PaintRecipe _recipe = new();

        public bool IsStub { get; }

        public ReactionTest(Reagent reagent1, Reagent reagent2, Reaction? reaction, ClipType clipType, bool isStub = false)

        {

            Reagent1 = reagent1;

            Reagent2 = reagent2;

            IsAllCatalysts = reagent1.IsCatalyst && reagent2.IsCatalyst;

            Clipped = clipType;

            Reaction = reaction;

            State = (reaction != null) ? TestState.Saved :

                (clipType == ClipType.None) ? TestState.Untested : TestState.ClippedResult;

            _recipe.AddReagent(reagent1.Name);

            _recipe.AddReagent(reagent2.Name);

            IsStub = isStub;

            UpdateHypotheticalColor();

        }

        #region Actions

        public async Task StartScan()

        {

            Clipped = ClipType.None;

            ScanProgress = 0;

            Reaction = null;

            BadReaction = null;

            State = TestState.Scanning;

            bool foundLab = await ReactionScannerService.Instance.CaptureReactionAsync(this);

            if (foundLab)

            {

                ObservedColor = ReactionScannerService.Instance.RecordedColor;

                if (_observedColor != null)

                {

                    Clipped = _observedColor.Red switch

                        {

                            0   => ClipType.RedLow,

                            255 => ClipType.RedHigh,

                            _   => ClipType.None

                        }

                        | _observedColor.Green switch

                        {

                            0   => ClipType.GreenLow,

                            255 => ClipType.GreenHigh,

                            _   => ClipType.None

                        }

                        | _observedColor.Blue switch

                        {

                            0   => ClipType.BlueLow,

                            255 => ClipType.BlueHigh,

            }

            Reaction = null;

            BadReaction = null;

            Clipped = ClipType.None;

            State = TestState.Untested;

        }

        public void SaveReaction()

        {

            PlayerProfile? profile = ProfileManager.CurrentProfile;

            if (profile == null) return;

            profile.Reactions.Set(Reagent1, Reagent2, Reaction);

            profile.Save();

            State = TestState.Saved;

        }

        #endregion

        #region Internals

        private Reaction? CalculateReaction()

        {

            if (ProfileManager.CurrentProfile == null) return null;

            if (HypotheticalColor == null) return null;

            if (ObservedColor == null) return null;

            {

            }

            return ReactionScannerService.CalculateReaction(HypotheticalColor, ObservedColor);

        }

        private void UpdateHypotheticalColor()

        {

            HypotheticalColor = null;

        }

        #endregion

        #region Interface Implementations

        public event PropertyChangedEventHandler? PropertyChanged;

        [NotifyPropertyChangedInvocator]

        private void NotifyPropertyChanged([CallerMemberName] string? propertyName = null)

        {

            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

        }

                            RecordedColor = reactedColor;

                            _lastSwatchX  = x;

                            _lastSwatchY  = y;

                            _firstRun     = false;

                            IsCaptured    = true;

                            return true;

                        }

                    }

                    WriteLog(LogVerbosity.Excessive, "False-positive patch of color {0},{1},{2} at {3},{4}", patchColor.R, patchColor.G, patchColor.B, roughX, roughY);

                }

            }

            return false;

        }

        {

            // A 3-reagent reaction.

            Debug.Assert(reaction1 != null);

            Debug.Assert(reaction2 != null);

            int r = reactedColor.Red   - expectedColor.Red   - reaction1.Red   - reaction2.Red;

            int g = reactedColor.Green - expectedColor.Green - reaction1.Green - reaction2.Green;

            int b = reactedColor.Blue  - expectedColor.Blue  - reaction1.Blue  - reaction2.Blue;

            return new Reaction(r, g, b);

        }

        public static Reaction CalculateReaction(PaintColor expectedColor, PaintColor reactedColor)

        {

            // A 2-reagent reaction.

            int r = reactedColor.Red   - expectedColor.Red;

            int g = reactedColor.Green - expectedColor.Green;

using DesertPaintCodex.Util;

using ReactiveUI;

namespace DesertPaintCodex.ViewModels

{

    public class ReactionTestViewModel : ViewModelBase

    {

        private ReactionTest _reactionTest = Constants.StubReactionTest;

        public ReactionTest ReactionTest

        {

            get => _reactionTest;

            set => this.RaiseAndSetIfChanged(ref _reactionTest, value);

        }

        private readonly List<Reagent> _allPigmentList = new();

        private readonly List<Reagent> _allReagentList = new();

        public ReactionTestViewModel()

        {

            List<string> reagentNames = ReagentService.Names;

            foreach (var reagent in reagentNames.Select(ReagentService.GetReagent))

            {

                if (!reagent.IsCatalyst)

                { 

                    _allPigmentList.Add(reagent);

                }

                _allReagentList.Add(reagent);

            }

            this.WhenAnyValue(x => x.ReactionTest)

                .Subscribe(_ => UpdateDerivedState());

        private void SetupTest()

        {

            if (ReactionTest.Requires3Way)

            {

                FilterBufferPigments();

            }

        }

        private void FilterBufferPigments()

        {

            // Avalonia doesn't really have proper filtering for listy controls yet.

            PlayerProfile? profile = ProfileManager.CurrentProfile;

            if (profile == null) return;

            ReactionSet reactions = profile.Reactions;

            List<Reagent> bufferList = ReactionTest.IsAllCatalysts ? _allPigmentList : _allReagentList;

            {

            }

            // BufferPigmentList.AddRange(_allPigmentList.Where(pigment =>

            //         pigment != ReactionTest.Reagent1 && pigment != ReactionTest.Reagent2));

        }

        public async void Analyze()

        {

            Debug.WriteLine("Analyze");

            try

            {

                await ReactionTest.StartScan();

                await FinalizeTestResults.Execute();

            }

            catch (OperationCanceledException)

            {

        }

        public void CancelScan()

        {

            ReactionTest.CancelScan();

        }

        public async Task OpenScreenSettings()

        {

            await ShowScreenSettingsDialog.Handle(new ScreenSettingsViewModel());

        }

        public async Task ShowClipInfo()

        {

            await ShowInfoBox("Clipped Reactions", "The Pigment Lab is only capable of displaying color channel values in the 0-255 range. However, sometimes, your reactions will push one or more channels outside of that range. When that happens, the value will be clamped either to 0 or 255. In this case, we say that the reaction was \"Clipped.\"\n\nThis is nothing to panic about, though. We solve this issue by using a third (buffer) reagent to offset the extreme value, so that it falls within measurable range, similar to how we test Catalyst+Catalyst reactions. Desert Paint Codex will automatically do the math for this, but it does move clipped reactions towards the end of your test list, because you'll want any reactions between the buffer reagent and your two test reagents already known, prior to running your buffered test.");

        }

        private void Test()

        {

            Debug.WriteLine("Test complete");

        }

        public Interaction<ScreenSettingsViewModel, Unit> ShowScreenSettingsDialog { get; }

        public ReactiveCommand<Unit, Unit> ClearReaction { get; }

        public ReactiveCommand<Unit, Unit> SaveReaction { get; }

        public ReactiveCommand<Unit, Unit> FinalizeTestResults { get; }

    }

}

             mc:Ignorable="d" d:DesignWidth="310" d:DesignHeight="450"

             x:Class="DesertPaintCodex.Views.ReactionTestView"

             IsVisible="{Binding Path=!ReactionTest.IsStub}"

             >

    <Design.DataContext>

        <vm:ReactionTestViewModel />

    </Design.DataContext>

    <UserControl.Styles>

        <Style Selector="StackPanel.ReagentRow">

            <Setter Property="Orientation" Value="Horizontal"/>

            <Setter Property="Spacing" Value="10"/>

            <Setter Property="Height" Value="30"/>

        </Style>

        <Style Selector="TextBlock.ReagentLabel">

            <Setter Property="VerticalAlignment" Value="Center"/>

            <Setter Property="TextAlignment" Value="Right"/>

            <Setter Property="Width" Value="80"/>

        </Style>

        <Style Selector="TextBlock.ReagentName">

            <Setter Property="VerticalAlignment" Value="Center"/>

            <Setter Property="Width" Value="120"/>

        </Style>

    </UserControl.Styles>

    <StackPanel Spacing="20" Margin="20 0 0 0">

        <StackPanel DockPanel.Dock="Top" Orientation="Vertical" Spacing="5">

            <TextBlock Classes="BlockHeader">REAGENTS</TextBlock>

            <Border Classes="ThinFrame">

                <StackPanel Orientation="Vertical" Spacing="10">

                                  IsVisible="{Binding ReactionTest.CanPickBuffer}"

                                  PlaceholderText="Choose" Width="120" Height="30">

                            <ComboBox.ItemTemplate>

                                <DataTemplate>

                                    <TextBlock Text="{Binding Name}" />

                                </DataTemplate>

                            </ComboBox.ItemTemplate>

                        </ComboBox>

                        <Border Classes="ReagentSwatch"

                    </StackPanel>

                    <StackPanel Classes="ReagentRow">

                        <TextBlock Classes="ReagentLabel">Reagent #1:</TextBlock>

                        <TextBlock Classes="ReagentName" Text="{Binding ReactionTest.Reagent1.Name}" />

                        <Border Classes="ReagentSwatch"

                            Background="{Binding ReactionTest.Reagent1.Color, Converter={StaticResource paintToBrush}, FallbackValue=#00000000}" />

                    </StackPanel>

                    <StackPanel Classes="ReagentRow">

                        <TextBlock Classes="ReagentLabel">Reagent #2:</TextBlock>

                        <TextBlock Classes="ReagentName" Text="{Binding ReactionTest.Reagent2.Name}" />

                        <Border Classes="ReagentSwatch"

                            Background="{Binding ReactionTest.Reagent2.Color, Converter={StaticResource paintToBrush}, FallbackValue=#00000000}" />

                    </StackPanel>

                </StackPanel>

            </Border>

        </StackPanel>

        <StackPanel DockPanel.Dock="Top" Orientation="Vertical" Spacing="5">

            <TextBlock Classes="BlockHeader">HYPOTHETICAL COLOR</TextBlock>

            <views:PaintSwatchView ShowName="False" Color="{Binding ReactionTest.HypotheticalColor}"/>

        </StackPanel>

         <Grid ColumnDefinitions="*,15,*" IsVisible="{Binding ReactionTest.CanScan}">

            <Button Grid.Column="0" Padding="11 5 11 5" Command="{Binding Analyze}">Analyze Mixture</Button>

            <Button Grid.Column="2" Padding="11 5 11 5" Command="{Binding MarkInert}">Mark Inert</Button>

        </Grid>

        <StackPanel Orientation="Vertical" Spacing="10" IsVisible="{Binding ReactionTest.IsScanning}">

            <ProgressBar DockPanel.Dock="Top" Value="{Binding ReactionTest.ScanProgress}" Height="20" />