using System.Text.Json;
using XFEEDToolBox.Controls;
using XFEEDToolBox.Core.Galaxy;
using XFEEDToolBox.Core.Models;

namespace XFEEDToolBox;

public partial class App
{
    private static async Task<object> RunGalaxyBlackHoleProbeAsync(string directory,IReadOnlyList<GalacticSystem> recorded)
    {
        static void Require(bool value,string message){if(!value)throw new InvalidOperationException(message);}
        var candidates=recorded.Where(s=>s.SystemAddress is >0&&s.Position.IsValid).ToArray();
        var actual=candidates.FirstOrDefault(s=>string.Equals(s.StarClass,"H",StringComparison.OrdinalIgnoreCase))??candidates.First();
        // The name, address, star class and coordinates remain captured data.
        // Classification41, RGBA and physical size are explicit test inputs;
        // this does not establish an observed black hole at this address.
        var appearance=new GalaxyOriginalStellarAppearance(0xffe0b070,0xffe0b070,1,1,41,.7f,.7f,false);
        var target=actual with{OriginalAppearance=appearance};
        var previous=MainWindow.Content;var host=new Grid();var map=new GalaxyMapView();host.Children.Add(map);MainWindow.Content=host;
        var observations=new Dictionary<string,object>();
        async Task Save(string name)
        {
            map.RenderNowForProbe();var pixels=map.CapturePixelsForProbe();
            var peak=0;var nonBlack=0;
            for(var i=0;i<pixels.Pixels.Length;i+=4)
            {var rgb=Math.Max(pixels.Pixels[i],Math.Max(pixels.Pixels[i+1],pixels.Pixels[i+2]));peak=Math.Max(peak,rgb);if(rgb>0)nonBlack++;}
            observations[name]=new{pixels.Width,pixels.Height,submittedBlackHoles=map.OriginalBlackHolesDrawnForProbe,
                retainedModelHits=map.VisibleStars,nameLabels=map.VisibleNameLabels,gpuPeakRgb=peak,gpuNonBlackPixels=nonBlack,
                submissionIsNotPixelVisibility=true};
            using(await map.FreezeForXamlProbeAsync())await CaptureRefinementElementAsync(host,Path.Combine(directory,name+".png"));
        }
        try
        {
            var basis=GalaxyMapFilter.Default with{Mode=GalaxyMapMode.Realistic,Values=null,ShowLabels=true,ShowMarkers=false,
                ShowRoute=true,ShowBackground=false,ShowGrid=false,ShowLinks=false,ShowConstellations=false,
                ShowCurrentTradeFlows=false,ShowHistoricalTradeFlows=false,ShowRegionNames=false,ShowNebulaNames=false,
                ShowGalacticZonesPlane=false,ShowGalacticZoneNames=false};
            map.Filter=basis;map.Systems=[target];
            await Task.Delay(180);map.SetCameraPoseForProbe(new(actual.Position,0,0,24));map.RenderNowForProbe();
            Require(!map.CameraMotionPendingForProbe&&map.OriginalBlackHolesDrawnForProbe==1&&map.VisibleStars==1&&map.VisibleNameLabels==1,
                "Realistic NavigationMarkers did not submit the synthetic physical black hole and its actual recorded name independently of ShowMarkers.");
            map.SelectAt(map.ProjectForProbe(target.Position));Require(map.Selection?.SystemAddress==target.SystemAddress,"The retained black-hole fixture did not preserve the exact recorded hit.");
            map.ClearSelection();map.RenderNowForProbe();await Save("black-hole-near");

            map.Filter=basis with{ShowRoute=false,ShowMarkers=true};map.RenderNowForProbe();
            Require(map.OriginalBlackHolesDrawnForProbe==0&&map.VisibleStars==1&&map.VisibleNameLabels==1,
                "The general marker switch replaced the independent NavigationMarkers gate for the special GPU pass.");
            await Save("black-hole-no-special");

            // A non-black original background exposes a destination-alpha
            // rectangular wipe that an all-black source fixture cannot reveal.
            map.Filter=basis with{ShowBackground=true};map.RenderNowForProbe();
            for(var wait=0;map.OriginalMilkyWayLoadPendingForProbe&&wait<100;wait++){await Task.Delay(20);map.RenderNowForProbe();}
            Require(map.OriginalBlackHolesDrawnForProbe==1,"The original background prevented the black-hole material from being submitted.");
            await Save("black-hole-background");
            map.Filter=map.Filter with{ShowRoute=false};map.RenderNowForProbe();await Save("black-hole-background-no-special");

            map.Filter=basis with{Mode=GalaxyMapMode.Map,Category=GalaxyFilterCategory.StarClass};map.RenderNowForProbe();
            Require(map.OriginalBlackHolesDrawnForProbe==0&&map.VisibleStars==1&&map.VisibleNameLabels==1,
                "Classified mode submitted the separate physical black-hole material or lost the ordinary classified point.");
            map.Filter=map.Filter with{Values=new HashSet<string>(),IncludeUnknown=false};map.RenderNowForProbe();
            Require(map.OriginalBlackHolesDrawnForProbe==0&&map.VisibleStars==0&&map.VisibleNameLabels==0&&map.FilteredModels==0,
                "The special physical type bypassed an empty strict classified filter.");
            map.SelectAt(map.ProjectForProbe(target.Position));Require(map.Selection is null,"The strict hidden black-hole fixture retained a hit.");
            await Save("black-hole-strict-empty");

            map.Filter=basis;map.Systems=[target with{OriginalAppearance=appearance with{RealisticRgba=0x00e0b070}}];map.RenderNowForProbe();
            Require(map.OriginalBlackHolesDrawnForProbe==0&&map.VisibleStars==0&&map.VisibleNameLabels==0,
                "An explicit original alpha-zero style retained a black-hole model, name or GPU submission.");
            map.SelectAt(map.ProjectForProbe(target.Position));Require(map.Selection is null,"An alpha-zero black hole retained a hit.");
            map.Systems=[target with{OriginalAppearance=appearance with{Classification=4}}];map.RenderNowForProbe();
            Require(map.OriginalBlackHolesDrawnForProbe==0&&map.VisibleStars==1,"A non-special physical classification entered the separate black-hole material.");

            var result=new{actual.Name,actual.SystemAddress,actual.Position,recordedStarClass=actual.StarClass,
                classificationExplicitSyntheticFixture=41,physicalSizeExplicitSyntheticFixture=.7f,appearanceRgbaExplicitSyntheticFixture=true,
                fixtureIsNotObservedBlackHole=true,generatedCatalogueCoordinates=false,cameraPoseExplicitFixture=true,cameraDistance=24,
                realisticNavigationMarkersSubmitsOne=true,generalMarkerSwitchIndependent=true,navigationMarkersOffSubmitsNone=true,
                classifiedUsesOrdinaryPoint=true,ordinaryClassificationHasNoSpecialSubmission=true,
                strictEmptyNoSpecialModelLabelOrHit=true,explicitOriginalAlphaZeroNoModelLabelOrHit=true,
                submissionCountDoesNotEstablishPixelVisibility=true,observations,gameAccess=false};
            await File.WriteAllTextAsync(Path.Combine(directory,"black-hole-probe.json"),JsonSerializer.Serialize(result,new JsonSerializerOptions{WriteIndented=true}));
            return result;
        }
        finally{map.SuspendPage();MainWindow.Content=previous;}
    }
}