using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.Shapes;
using Avalonia.Markup.Xaml;
using DesertPaintCodex.Models;

namespace DesertPaintCodex.Views
{
    public class ClipArrowsView : UserControl
    {
        public static readonly DirectProperty<ClipArrowsView, ClipType> FlagsProperty = AvaloniaProperty.RegisterDirect<ClipArrowsView, ClipType>( nameof(Flags),
            o => o.Flags,
            (o, v) => o.Flags = v);
        private ClipType _flags;
        public ClipType Flags { get => _flags; set => SetAndRaise(FlagsProperty, ref _flags, value); }

        private readonly Path _redArrow;
        private readonly Path _greenArrow;
        private readonly Path _blueArrow;
        
        public ClipArrowsView()
        {
            InitializeComponent();
            
            _redArrow   = this.FindControl<Path>("RedArrow");
            _greenArrow = this.FindControl<Path>("GreenArrow");
            _blueArrow  = this.FindControl<Path>("BlueArrow");
            
            FlagsProperty.Changed.AddClassHandler<ClipArrowsView>((x, _) => x.UpdateFlags());

            UpdateFlags();
        }

        private void InitializeComponent()
        {
            AvaloniaXamlLoader.Load(this);
        }

        private void UpdateFlags()
        {
            UpdateArrow(_redArrow,   ClipType.RedHigh,   ClipType.RedLow);
            UpdateArrow(_greenArrow, ClipType.GreenHigh, ClipType.GreenLow);
            UpdateArrow(_blueArrow,  ClipType.BlueHigh,  ClipType.BlueLow);
        }

        private void UpdateArrow(IControl arrow, ClipType highFlag, ClipType lowFlag)
        {
            if (_flags.HasFlag(highFlag))
            {
                arrow.Classes.Remove("DownArrow");
                arrow.Classes.Add("UpArrow");
                arrow.IsVisible = true;
            }
            else if (_flags.HasFlag(lowFlag))
            {
                arrow.Classes.Remove("UpArrow");
                arrow.Classes.Add("DownArrow");
                arrow.IsVisible = true;
            }
            else
            {
                arrow.IsVisible = false;
            }
        }
    }
}