using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using CommunityToolkit.Mvvm.Input;
using Controls.ViewModels;
using NamedPipes;
using NrxDebugVisualizer.Models;
using NrxDebugVisualizer.Scenes;
using Num.Roto.Visualization.Math.Geometry;
using Num.Roto.Visualization.Math.Utilities;
using Num.Roto.Visualization.Types;
using Num.Roto.Visualization.VulkanLib.SceneInteraction;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Threading;
using KontractFrame = System.ValueTuple<System.Numerics.Vector3, System.Numerics.Quaternion, float>;
namespace NrxDebugVisualizer.ViewModels;

internal sealed partial class MainWindowViewModel : ViewModelBase
{
    public ProportionalDockControlViewModel ProportionalDockControlViewModel { get; } = new();
    public VulkanSceneControlViewModel VulkanSceneControlViewModel => ProportionalDockControlViewModel.VulkanSceneControlViewModel;
    public SceneTreeViewViewModel SceneTreeViewViewModel => ProportionalDockControlViewModel.SceneTreeViewViewModel?? throw new InvalidOperationException("SceneTreeViewViewModel is not available");
    public SceneInteraction SceneInteraction => ProportionalDockControlViewModel.SceneInteraction;

    public DebugVisualizerScene DebugVisualizerScene => ProportionalDockControlViewModel.Scene as DebugVisualizerScene ?? throw new InvalidOperationException("Scene is not a DebugVisualizerScene");

    private PipeServer PipeServer {get;init;}
    public MainWindowViewModel()
    {
        ProportionalDockControlViewModel.Scene = new DebugVisualizerScene();
        ProportionalDockControlViewModel.Scene.SelectedCamera.DefaultFrame = CameraView.Frame(ViewPosition);
        PipeServer = new PipeServer(nameof(NrxDebugVisualizer), UpdateScene, cancellationToken: CancellationToken.None);
    }

    #region Commands
    [RelayCommand]
    public static void ShowLogViewer()
    {
        Log.LogViewerEnabled = true;
    }
    [RelayCommand]
    private static void Exit(object? parameter)
    {
        if (Application.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktopApp)
        {
            desktopApp.Shutdown();
        }
    }
    [RelayCommand]
    internal void ResetCamera()
    {
        ProportionalDockControlViewModel.VulkanSceneControlViewModel.ResetCamera(CameraView.Frame(ViewPosition));
    }

    [RelayCommand]
    internal void FitToWindow()
    {
        ProportionalDockControlViewModel.Scene?.FitToWindow(0.95f);
        ProportionalDockControlViewModel.VulkanSceneControlViewModel.SceneInteraction.Update();
    }
    #endregion

    #region Camera View
    public static IEnumerable<CameraView.Position> ViewPositions => Enum.GetValues<CameraView.Position>();
    private CameraView.Position _viewPosition = CameraView.Position.Custom1;
    public CameraView.Position ViewPosition
    {
        get => _viewPosition;
        set
        {
            if (_viewPosition == value) return;
            _viewPosition = value;
            OnPropertyChanged();
            if (_viewPosition == CameraView.Position.User) return;
            ProportionalDockControlViewModel.Scene?.SelectedCamera.DefaultFrame = CameraView.Frame(_viewPosition);
            FitToWindow();
        }
    }
    #endregion

    #region Pipe Server 
    private void UpdateScene(VisualizerModel visualizerModel)
    {
        SetPoint(visualizerModel.Point);
        SetPointList(visualizerModel.PointArray);
        SetFrame(visualizerModel.Frame);
        SetFrameList(visualizerModel.FrameArray);
        SceneInteraction.Update();
    }
    private static Frame ToFrame(KontractFrame kontractFrame)
    {
        var (translation, orientation, scale) = kontractFrame;
        return new Frame(translation, scale, orientation);
    }
    private static Frame[] ToFrameArray(IEnumerable<KontractFrame> frameList)
    {
        return [.. frameList.Select(ToFrame)];
    }

    private void SetPoint(Vector3? point)
    {
        if (point is null) return;
        DebugVisualizerScene.AddPointGeometry(point.Value, 5f);
    }

    private void SetPointList(Vector3[]? pointList)
    {
        if (pointList == null || pointList.Length < 1) return;
        DebugVisualizerScene.AddPointListGeometry(pointList, 5);
    }

    private void SetFrame(KontractFrame? kontractFrame)
    {
        if (kontractFrame is null) return;
        DebugVisualizerScene.AddFrameGeometry(ToFrame(kontractFrame.Value), 1);
    }

    private void SetFrameList(KontractFrame[]? frameArray)
    {
        if (frameArray == null || frameArray.Length < 1) return;
        DebugVisualizerScene.AddFrameListGeometry(ToFrameArray(frameArray), 1);
    }
    #endregion
}