using System.Text.Json;
using System.Collections.Specialized;
using XFEEDToolBox.Core.Presentation;
using XFEEDToolBox.Core.Navigation;
using XFEEDToolBox.Views;

namespace XFEEDToolBox;

public partial class App
{
    private static async Task RunCurrentSystemProbeAsync(string path)
    {
        var directory=Path.GetDirectoryName(Path.GetFullPath(path))!;Directory.CreateDirectory(directory);
        string? failure=null;object? result=null;
        static void Require(bool value,string message){if(!value)throw new InvalidOperationException(message);}
        try
        {
            Require(ViewModel.OfflinePreview,"Current-system fixture requires --offline-preview and an isolated data directory.");
            Require(Runtime.FlightDriver is null&&Runtime.Journal.Sequence==0,"Offline fixture must not bind a game or read the live Journal.");
            MainWindow.AppWindow.Move(new(-30000,-30000));MainWindow.AppWindow.Resize(new(1680,1080));MainWindow.AppWindow.Show(false);
            AppShellPage.Current!.Navigate(typeof(CurrentSystemPage));await Task.Delay(350);
            Require(!ViewModel.CurrentSystemReading,"Offline fixture started a live catalogue read.");
            var page=(CurrentSystemPage)AppShellPage.Current.CurrentPage!;
            var categories=new[]{SystemLocationCategory.Signal,SystemLocationCategory.Asteroid,SystemLocationCategory.Signal,SystemLocationCategory.Carrier,SystemLocationCategory.Signal,
                SystemLocationCategory.Station,SystemLocationCategory.PointOfInterest,SystemLocationCategory.Star,SystemLocationCategory.Settlement,SystemLocationCategory.Planet,SystemLocationCategory.LandablePlanet};
            var names=new[]{"$USS_DegradedEmissions;","HIP 12099 A Belt Cluster 2","$USS_EncodedEmissions;","SPACEBALL1 | L1NK","$USS_HighGradeEmissions;",
                "Ray Enterprise","$MULTIPLAYER_SCENARIO42_TITLE;","HIP 12099","Jameson Crash Site","HIP 12099 1","HIP 12099 1 b"};
            var rows=Enumerable.Range(0,149).Select(i=>
            {
                var kind=i<categories.Length?categories[i]:SystemLocationCategory.Station;
                return new SystemLocation(i+1,(ulong)i+100,i<names.Length?names[i]:$"离线测试地点 {i+1:000}","",i,kind,
                    kind is SystemLocationCategory.Station or SystemLocationCategory.Carrier or SystemLocationCategory.Settlement?70+i:null,
                    new(0,0,1000+i*1000),1000+i*1000,i==5,"interface-probe-"+i);
            }).ToArray();
            var snapshot=new CurrentSystemSnapshot(1,"HIP 12099",1,1,DateTimeOffset.UtcNow,rows);
            ViewModel.ApplyCurrentSystemSnapshot(snapshot);await Task.Delay(150);page.UpdateLayout();
            var list=Descendants(page).OfType<ListView>().Single();
            var scroll=Descendants(list).OfType<ScrollViewer>().First();
            Require(ViewModel.CurrentSystemLocations.Count==149,"Current system catalogue did not reach its real ListView.");
            Require(ViewModel.CurrentSystemLocations[0].Name=="衰变信号"&&ViewModel.CurrentSystemLocations[1].Name=="HIP 12099 A 小行星带 2","Actual ListView did not use the built-in Chinese resource.");
            var first=ViewModel.CurrentSystemLocations.ToArray();var actions=new List<NotifyCollectionChangedAction>();var properties=new List<string>();
            ViewModel.CurrentSystemLocations.CollectionChanged+=(_,e)=>actions.Add(e.Action);
            foreach(var row in first)row.PropertyChanged+=(_,e)=>properties.Add(e.PropertyName!);
            var selected=first[12];ViewModel.SelectedSystemLocation=selected;
            scroll.ChangeView(null,650,null,true);await Task.Delay(120);page.UpdateLayout();var offset=scroll.VerticalOffset;
            var status=ViewModel.CurrentSystemStatus;
            for(var sample=1;sample<=60;sample++)
                ViewModel.ApplyCurrentSystemSnapshot(snapshot with{Sequence=sample+1,ObservedAt=snapshot.ObservedAt.AddSeconds(sample*3),
                    Locations=rows.Select(x=>x with{Position=new(1,sample,3),DistanceMetres=x.DistanceMetres+.001}).ToArray()});
            await Task.Delay(100);page.UpdateLayout();
            Require(actions.Count==0&&properties.Count==0,"Unchanged displayed values caused list/property notifications.");
            Require(Math.Abs(scroll.VerticalOffset-offset)<.1&&ViewModel.CurrentSystemStatus==status&&!ViewModel.CurrentSystemReading,"Unchanged samples disturbed scrolling, the header or loading state.");
            var stableProperties=properties.Count;var stableEvents=actions.Count;
            var changed=rows.Select(x=>x.Key==selected.Record.Key?x with{DistanceMetres=60500}:x).ToArray();
            ViewModel.ApplyCurrentSystemSnapshot(snapshot with{Sequence=62,Locations=changed});await Task.Delay(100);page.UpdateLayout();
            Require(actions.Count==0&&properties.SequenceEqual(new[]{"Distance"}),"A distance change refreshed more than its displayed binding.");
            Require(ReferenceEquals(selected,ViewModel.SelectedSystemLocation)&&first.Zip(ViewModel.CurrentSystemLocations).All(x=>ReferenceEquals(x.First,x.Second)),"Distance update recreated/reordered rows or reset selection.");
            var container=list.ContainerFromItem(selected);
            Require(container is not null&&Descendants(container).OfType<TextBlock>().Any(t=>t.Text=="60.5 km"),"The visible row's actual XAML distance binding did not update.");
            var distanceProperties=properties.ToArray();
            var anchor=first.First(x=>list.ContainerFromItem(x) is FrameworkElement element&&element.TransformToVisual(list).TransformPoint(new()).Y>=0);
            double AnchorY()=>((FrameworkElement)list.ContainerFromItem(anchor)).TransformToVisual(list).TransformPoint(new()).Y;
            var anchorY=AnchorY();
            var signal=new SystemLocation(2000,9000,"$USS_DegradedEmissions;","",22,SystemLocationCategory.Signal,null,new(0,0,1500),1500,false,"new-signal");
            ViewModel.ApplyCurrentSystemSnapshot(snapshot with{Sequence=63,Locations=changed.Append(signal).OrderBy(x=>x.DistanceMetres).ToArray()});await Task.Delay(100);page.UpdateLayout();var addedAnchorY=AnchorY();
            ViewModel.ApplyCurrentSystemSnapshot(snapshot with{Sequence=64,Locations=changed.OrderBy(x=>x.DistanceMetres).ToArray()});await Task.Delay(100);page.UpdateLayout();var removedAnchorY=AnchorY();
            Require(actions.SequenceEqual(new[]{NotifyCollectionChangedAction.Add,NotifyCollectionChangedAction.Remove}),"Signal arrival/removal caused a whole-list operation.");
            Require(Math.Abs(anchorY-addedAnchorY)<2&&Math.Abs(anchorY-removedAnchorY)<2,"Adding/removing a signal moved the currently visible anchor.");
            Require(ReferenceEquals(selected,ViewModel.SelectedSystemLocation),"Signal changes reset selection.");
            await CapturePageAsync(page,Path.Combine(directory,"current-system-incremental.png"));
            ViewModel.CurrentSystemSearch="高阶材料";Require(ViewModel.CurrentSystemLocations.Count==1,"Chinese navigation name search failed.");
            ViewModel.CurrentSystemSearch="HighGradeEmissions";Require(ViewModel.CurrentSystemLocations.Count==1,"Original native name search failed.");
            ViewModel.CurrentSystemSearch="";ViewModel.SelectedSystemLocation=ViewModel.CurrentSystemLocations.Single(x=>x.Name=="Ray Enterprise");
            ViewModel.ShowSystemStations=false;Require(ViewModel.CurrentSystemLocations.All(x=>x.Record.Category!=SystemLocationCategory.Station)&&ViewModel.SelectedSystemLocation is null,"Station filter did not apply.");
            ViewModel.ShowSystemStations=true;ViewModel.CurrentSystemSearch="Jameson";Require(ViewModel.CurrentSystemLocations.Count==1,"Proper name search failed.");
            ViewModel.CurrentSystemSearch="";ViewModel.SelectedSystemLocation=ViewModel.CurrentSystemLocations.Single(x=>x.Name=="Ray Enterprise");
            scroll.ChangeView(null,0,null,true);
            Require(!ViewModel.StartSystemFlightCommand.CanExecute(null),"Unverified local flight controls must remain disabled.");
            await Task.Delay(100);page.UpdateLayout();await CapturePageAsync(page,Path.Combine(directory,"current-system.png"));
            result=new{visible=ViewModel.CurrentSystemLocations.Count,unchangedSamples=60,stableEvents,stableProperties,distanceProperties,signalEvents=actions.Select(x=>x.ToString()).Take(2).ToArray(),
                scrollOffsetBefore=offset,anchorY,addedAnchorY,removedAnchorY,rowPreserved=true,selectionPreserved=true,searchPassed=true,localizedNames=first.Take(11).Select(x=>x.Name),
                nativeLocalFlightReady=ViewModel.SystemFlightReady,gameFlightCommandsInvoked=false,gameRestartInvoked=false,gameChannelBound=Runtime.FlightDriver is not null,journalEvents=Runtime.Journal.Sequence,fixtureOnly=true};
        }
        catch(Exception error){failure=error.ToString();}
        await File.WriteAllTextAsync(path,JsonSerializer.Serialize(new{result,failure,uiError=ViewModel.ErrorMessage},new JsonSerializerOptions{WriteIndented=true}));MainWindow.Close();
    }
}