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> RunGalaxyAuthoredBackgroundProbeAsync(GalaxyMapView map,string directory)
    {
        map.Systems=[];map.CurrentSystem="";map.ClearSelection();
        map.Filter=GalaxyMapFilter.Default with{ShowGrid=false,ShowMarkers=false,ShowGalacticZonesPlane=false,
            ShowRegionNames=false,ShowNebulaNames=false,ShowGalacticZoneNames=false,ShowConstellations=false};
        var rows=new List<object>();var aboveChanged=0;
        try
        {
            foreach(var (name,focus,zoom) in new[]{("sol",new Coordinates(0,0,0),1d),
                ("centre",new Coordinates(15,-30,25895),.125d),("above",new Coordinates(15,20000,25895),.0125d)})
            {
                map.Centre=focus;map.ResetCamera();map.Zoom(zoom);map.AdvanceCameraMotionForProbe(256);
                map.SetOriginalPlaneEnabledForProbe(true);map.RenderNowForProbe();var on=map.CapturePixelsForProbe();
                await SaveModelFrameAsync(new(on.Width,on.Height,on.Pixels,0),Path.Combine(directory,"authored-background-"+name+".png"));
                map.SetOriginalPlaneEnabledForProbe(false);map.RenderNowForProbe();var off=map.CapturePixelsForProbe();
                var changed=0;
                for(var i=0;i<on.Pixels.Length;i+=4)
                    if(Math.Max(Math.Abs(on.Pixels[i]-off.Pixels[i]),Math.Max(Math.Abs(on.Pixels[i+1]-off.Pixels[i+1]),Math.Abs(on.Pixels[i+2]-off.Pixels[i+2])))>3)changed++;
                if(name=="above")
                {
                    aboveChanged=changed;
                    await SaveModelFrameAsync(new(off.Width,off.Height,off.Pixels,0),Path.Combine(directory,"authored-background-above-without-plane.png"));
                }
                if(!map.OriginalPlaneReadyForProbe||!map.OriginalSceneHdrDrawnForProbe||map.VisibleStars!=0)
                    throw new InvalidOperationException("Authored background integration lacks its original resources/HDR scope or introduced catalogue stars.");
                rows.Add(new{name,focus,actualPose=map.ActualCameraPoseForProbe,planeContributionPixelsAbove3=changed,
                    originalPlaneReady=map.OriginalPlaneReadyForProbe,originalMilkyWayInstances=map.OriginalMilkyWayInstancesForProbe,
                    sharedSceneHdr=map.OriginalSceneHdrDrawnForProbe,visibleCatalogueStars=map.VisibleStars});
            }
            if(aboveChanged==0)throw new InvalidOperationException("The original plane made no visible contribution in the above-plane main renderer view.");
        }
        finally{map.SetOriginalPlaneEnabledForProbe(true);}
        var report=new{views=rows,cameraCoordinatesAreExplicitRendererFixtures=true,generatedCatalogueCoordinates=false,
            planeControlledToggle=true,sourceLayerOrder=new[]{"Plane1","Core10","MilkyWay13"},originalCompleteBackground=false,gameAccess=false};
        await File.WriteAllTextAsync(Path.Combine(directory,"authored-background-probe.json"),JsonSerializer.Serialize(report,new JsonSerializerOptions{WriteIndented=true}));
        return report;
    }
}