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

namespace DesertPaintCodex.Views
{
    public class ReactionUnitView : UserControl
    {
        public static readonly DirectProperty<ReactionUnitView, Reaction?> ReactionProperty = AvaloniaProperty.RegisterDirect<ReactionUnitView, Reaction?>( nameof(Reaction),
            o => o.Reaction,
            (o, v) => o.Reaction = v);
        private Reaction? _reaction;
        public Reaction? Reaction { get => _reaction; set => SetAndRaise(ReactionProperty, ref _reaction, value); }

        private readonly Border    _inertBox;
        
        private readonly Border    _redBox;
        private readonly Border    _greenBox;
        private readonly Border    _blueBox;
        
        private readonly TextBlock _redQty;
        private readonly TextBlock _greenQty;
        private readonly TextBlock _blueQty;
        
        private readonly Path      _redArrow;
        private readonly Path      _greenArrow;
        private readonly Path      _blueArrow;
        
        
        public ReactionUnitView()
        {
            InitializeComponent();

            _inertBox = this.FindControl<Border>("InertBox");
            
            _redBox     = this.FindControl<Border>("RedBox");
            _greenBox   = this.FindControl<Border>("GreenBox");
            _blueBox    = this.FindControl<Border>("BlueBox");
            
            _redQty   = _redBox.FindControl<TextBlock>("RedQty");
            _greenQty = _greenBox.FindControl<TextBlock>("GreenQty");
            _blueQty  = _blueBox.FindControl<TextBlock>("BlueQty");
            
            _redArrow   = _redBox.FindControl<Path>("RedArrow");
            _greenArrow = _greenBox.FindControl<Path>("GreenArrow");
            _blueArrow  = _blueBox.FindControl<Path>("BlueArrow");
            
            ReactionProperty.Changed.AddClassHandler<ReactionUnitView>((x, _) => x.UpdateReaction());

            UpdateReaction();
        }

        private void InitializeComponent()
        {
            AvaloniaXamlLoader.Load(this);
        }
        
        private void UpdateReaction()
        {
            if (_reaction == null)
            {
                _inertBox.IsVisible  = false;
                _redBox.IsVisible    = false;
                _greenBox.IsVisible  = false;
                _blueBox.IsVisible  = false;
                return;
            }

            _inertBox.IsVisible = (_reaction.Red == 0) && (_reaction.Green == 0) && (_reaction.Blue == 0);
            
            UpdateColor(_redBox,   _redQty,   _redArrow,   _reaction.Red);
            UpdateColor(_greenBox, _greenQty, _greenArrow, _reaction.Green);
            UpdateColor(_blueBox,  _blueQty,  _blueArrow,  _reaction.Blue);
        }
        
        private void UpdateColor(IControl box, TextBlock qty, IControl arrow, int value)
        {
            switch (value)
            {
                case > 0:
                    arrow.Classes.Remove("DownArrow");
                    arrow.Classes.Add("UpArrow");
                    qty.Text      = value.ToString();
                    box.IsVisible = true;
                    break;
                case < 0:
                    arrow.Classes.Remove("UpArrow");
                    arrow.Classes.Add("DownArrow");
                    qty.Text      = value.ToString();
                    box.IsVisible = true;
                    break;
                default:
                    box.IsVisible = false;
                    break;
            }
        }
    }
}