using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace PamhagenSysCtrl.Helpers.Pipeline {
    public class Press : INode, ISink {

        public const double DIAMETER = 120;

        public double CenterX { get; set; }
        public double CenterY { get; set; }
        public string Label { get; set; }

        public ISet<IEdge> Inputs { get; set; }
        public ISet<IEdge> Outputs { get; set; }

        protected Func<bool> CallbackIsFull;

        public double TopY => CenterY - DIAMETER / 2;
        public bool IsFull => CallbackIsFull();

        public int? CapacityLiters { get; set; }

        private Shape? _circle;
        private TextBlock? _text;


        public Press(string label, double x, double y, int capacityLiters, Func<bool> cbFull) {
            CenterX = x;
            CenterY = y;
            Label = label;
            CapacityLiters = capacityLiters;
            CallbackIsFull = cbFull;
            Inputs = new HashSet<IEdge>();
            Outputs = new HashSet<IEdge>();
        }

        public void Draw(Canvas canvas) {
            _circle = new Ellipse() {
                Width = DIAMETER,
                Height = DIAMETER,
                Stroke = Brushes.Black,
                StrokeThickness = 2,
                Fill = Brushes.WhiteSmoke,
            };
            _text = new() {
                Text = CapacityLiters.HasValue ? $"{Label}\n{CapacityLiters:N0}"  : Label,
                FontSize = 14,
                Width = DIAMETER,
                TextAlignment = TextAlignment.Center,
                VerticalAlignment = VerticalAlignment.Center,
            };
            _circle.SetValue(Canvas.LeftProperty, CenterX - DIAMETER / 2);
            _circle.SetValue(Canvas.TopProperty, CenterY - DIAMETER / 2);
            _text.SetValue(Canvas.LeftProperty, CenterX - DIAMETER / 2);
            _text.SetValue(Canvas.TopProperty, CenterY - (CapacityLiters.HasValue ? 20 : 10));
            canvas.Children.Add(_circle);
            canvas.Children.Add(_text);
        }

        public bool Update(double x, double y, bool down) {
            var hover = Math.Sqrt(Math.Pow(CenterX - x, 2) + Math.Pow(CenterY - y, 2)) <= DIAMETER / 2;
            _circle?.Fill = hover ? Brushes.LightGray : Brushes.WhiteSmoke;
            return hover;
        }
    }
}