using System;
using Avalonia;
using Avalonia.Input;
using Avalonia.Media;
using CommunityToolkit.Mvvm.Input;
using SimpleDraw.Models;

namespace SimpleDraw.ViewModels;

public class MainWindowViewModel : ViewModelBase
{
#pragma warning disable CA1822 // Mark members as static
    public MainWindowViewModel()
    {
        DisplaySplitEvent = new RelayCommand(DisplaySplit);
        CloseAppEvent = new RelayCommand(CloseApp);
        MaximizeAppEvent = new RelayCommand(MaximizeApp);
        MinimizeAppEvent = new RelayCommand(MinimizeApp);

        ColorPalette =
        [
            new ColorPickerButton
            {
                Color = new SolidColorBrush(new Color(r: 255, g: 255, b: 255, a: 255)),
            },

            new ColorPickerButton
            {
                Color = new SolidColorBrush(new Color(r: 0, g: 0, b: 0, a: 255)),
            },

            new ColorPickerButton
            {
                Color = new SolidColorBrush(new Color(r: 128, g: 128, b: 128, a: 255)),
            },

            new ColorPickerButton
            {
                Color = new SolidColorBrush(new Color(r: 255, g: 0, b: 0, a: 255)),
            },

            new ColorPickerButton
            {
                Color = new SolidColorBrush(new Color(r: 0, g: 255, b: 0, a: 255)),
            },

            new ColorPickerButton
            {
                Color = new SolidColorBrush(new Color(r: 0, g: 0, b: 255, a: 255)),
            },

            new ColorPickerButton
            {
                Color = new SolidColorBrush(new Color(r: 128, g: 0, b: 128, a: 255)),
            },

            new ColorPickerButton
            {
                Color = new SolidColorBrush(new Color(r: 128, g: 128, b: 0, a: 255)),
            }

        ];

        foreach (ColorPickerButton colorPickerButton in ColorPalette)
        {
            var currentColor = colorPickerButton.Color;
            colorPickerButton.SelectColorCommand = new RelayCommand(() => ChangeSelectedColor(currentColor));
        }
        
        Brush = new SolidColorBrush(Colors.Black);
        CanvasPointerPressedCommand = new RelayCommand<PointerPressedEventArgs>(OnCanvasPointerPressed);
        CanvasPointerMovedCommand = new RelayCommand<PointerEventArgs>(OnCanvasPointerMoved);
        CanvasPointerReleasedCommand = new RelayCommand<PointerReleasedEventArgs>(OnCanvasPointerReleased);
    }
    
#pragma warning restore CA1822 // Mark members as static

    private void ChangeSelectedColor(SolidColorBrush color)
    {
        Brush = color;
        SelectedColor = color.Color.ToString();
    }
    
    private void OnCanvasPointerPressed(PointerPressedEventArgs? e)
    {
        if (e == null) return;
        
        IsDrawing = true;
        DrawingPoints.Add(new DrawingPoints(Brush, BrushThickness));
        DrawingPoint = DrawingPoints[^1];
        // DrawingPoints.DrawingPointsList.Add(DrawingPoints.CurrentDrawingPoints);
        
        if (e.Source is Visual visual)
        {
            var point = e.GetPosition(visual);
            DrawingPoint.CurrentDrawingPoints.Add(point);
        }
    }
    
    private void OnCanvasPointerMoved(PointerEventArgs? e)
    {
        if (e == null || !IsDrawing) return;
        if (e.Source is Visual visual)
        {
            var point = e.GetPosition(visual);
            DrawingPoint?.CurrentDrawingPoints.Add(point);
        }
    }

    private void OnCanvasPointerReleased(PointerReleasedEventArgs? e)
    {
        IsDrawing = false;
    }
}